W25X16A
16M-BIT
SERIAL FLASH MEMORY WITH
4KB SECTORS AND DUAL OUTPUT SPI
-1-
Publication Release Date: August 7, 2009
Revision B
W25X16A
Table of Contents
1
GENERAL DESCRIPTION ......................................................................................................... 4
2
FEATURES ................................................................................................................................. 4
3
PIN CONFIGURATION SOIC 150-MIL ....................................................................................... 5
4
PIN CONFIGURATION SOIC 208-MIL ....................................................................................... 5
5
PAD CONFIGURATION WSON 6X5-MM................................................................................... 6
6
PIN CONFIGURATION PDIP 300-MIL ....................................................................................... 6
7
PIN DESCRIPTION SOIC 150/208-MIL, PDIP 300-MIL, WSON 6X5 ........................................ 7
8
PIN CONFIGURATION SOIC 300-MIL ....................................................................................... 7
9
PIN DESCRIPTION SOIC 300-MIL ............................................................................................ 8
9.1
Package Types ............................................................................................................... 9
9.2
Chip Select (/CS) ............................................................................................................ 9
9.3
Serial Data Output (DO) ................................................................................................. 9
9.4
Write Protect (/WP) ......................................................................................................... 9
9.5
HOLD (/HOLD)................................................................................................................ 9
9.6
Serial Clock (CLK) .......................................................................................................... 9
9.7
Serial Data Input / Output (DIO) ..................................................................................... 9
10
BLOCK DIAGRAM .................................................................................................................... 10
11
FUNCTIONAL DESCRIPTION ................................................................................................. 11
11.1
11.2
SPI OPERATIONS........................................................................................................ 11
11.1.1
SPI Modes ....................................................................................................................11
11.1.2
Dual Output SPI............................................................................................................11
11.1.3
Hold Function ...............................................................................................................11
WRITE PROTECTION .................................................................................................. 12
11.2.1
12
Write Protect Features..................................................................................................12
CONTROL AND STATUS REGISTERS ................................................................................... 13
12.1
12.2
STATUS REGISTER .................................................................................................... 13
12.1.1
BUSY............................................................................................................................13
12.1.2
Write Enable Latch (WEL) ............................................................................................13
12.1.3
Block Protect Bits (BP2, BP1, BP0) ..............................................................................13
12.1.4
Top/Bottom Block Protect (TB) .....................................................................................13
12.1.5
Reserved Bits ...............................................................................................................14
12.1.6
Status Register Protect (SRP) ......................................................................................14
12.1.7
Status Register Memory Protection ..............................................................................15
INSTRUCTIONS ........................................................................................................... 16
12.2.1
Manufacturer and Device Identification.........................................................................16
-2-
W25X16A
13
14
15
Instruction Set...............................................................................................................17
12.2.3
Write Enable (06h) ........................................................................................................18
12.2.4
Write Disable (04h) .......................................................................................................18
12.2.5
Read Status Register (05h) ..........................................................................................19
12.2.6
Write Status Register (01h) ..........................................................................................20
12.2.7
Read Data (03h) ...........................................................................................................21
12.2.8
Fast Read (0Bh) ...........................................................................................................22
12.2.9
Fast Read Dual Output (3Bh) .......................................................................................23
12.2.10
Page Program (02h) ...................................................................................................24
12.2.11
Sector Erase (20h) .....................................................................................................25
12.2.12
Block Erase (D8h) ......................................................................................................26
12.2.13
Chip Erase (C7h) ........................................................................................................27
12.2.14
Power-down (B9h) ......................................................................................................28
12.2.15
Release Power-down / Device ID (ABh) .....................................................................29
12.2.16
Read Manufacturer / Device ID (90h) .........................................................................31
12.2.17
JEDEC ID (9Fh)..........................................................................................................32
ELECTRICAL CHARACTERISTICS ......................................................................................... 33
13.1
Absolute Maximum Ratings .......................................................................................... 33
13.2
Operating Ranges ......................................................................................................... 33
13.3
Power-up Timing and Write Inhibit Threshold .............................................................. 34
13.4
DC Electrical Characteristics ........................................................................................ 35
13.5
AC Measurement Conditions ........................................................................................ 36
13.6
AC Electrical Characteristics ........................................................................................ 37
13.7
AC Electrical Characteristics (cont’d) ........................................................................... 38
13.8
Serial Output Timing ..................................................................................................... 39
13.9
Input Timing .................................................................................................................. 39
13.10
Hold Timing ................................................................................................................. 39
PACKAGE SPECIFICATION .................................................................................................... 40
14.1
8-Pin SOIC 150-mil (Package Code SN)...................................................................... 40
14.2
8-Pin SOIC 208-mil (Package Code SS) ...................................................................... 41
14.3
8-Pin PDIP 300-mil (Package Code DA) ...................................................................... 42
14.4
8-Contact 6x5mm WSON (Package Code ZP) ............................................................ 43
14.5
16-Pin SOIC 300-mil (Package Code SF) .................................................................... 45
ORDERING INFORMATION .................................................................................................... 46
15.1
16
12.2.2
Valid Part Numbers and Top Side Marking .................................................................. 47
REVISION HISTORY ................................................................................................................ 48
-3-
Publication Release Date: August 7, 2009
Revision B
W25X16A
1
GENERAL DESCRIPTION
The W25X16A (16M-bit) Serial Flash memory provide a storage solution for systems with limited
space, pins and power. The 25X series offers flexibility and performance well beyond ordinary Serial
Flash devices. They are ideal for code download applications as well as storing voice, text and data.
The devices operate on a single 2.7V to 3.6V power supply with current consumption as low as 5mA
active and 1µA for power-down. All devices are offered in space-saving packages.
The W25X16A array is organized into 8,192 programmable pages of 256-bytes each. Up to 256 bytes
can be programmed at a time using the Page Program instruction. Pages can be erased in groups of
16 (sector erase), groups of 256 (block erase) or the entire chip (chip erase). The W25X16A has 512
erasable sectors and 32 erasable blocks. The small 4KB sectors allow for greater flexibility in
applications that require data and parameter storage. (See figure 2.)
The W25X16A supports the standard Serial Peripheral Interface (SPI), and a high performance dual
output SPI using four pins: Serial Clock, Chip Select, Serial Data I/O and Serial Data Out. SPI clock
frequencies of up to 100MHz are supported allowing equivalent clock rates of 200MHz when using the
Fast Read Dual Output instruction. These transfer rates are comparable to those of 8 and 16-bit
Parallel Flash memories.
A Hold pin, Write Protect pin and programmable write protect, with top or bottom array control
features, provide further control flexibility. Additionally, the device supports JEDEC standard
manufacturer and device identification.
2
FEATURES
Family of Serial Flash Memories
– W25X16A: 16M-bit / 2M-byte (2,097,152)
– 256-bytes per programmable page
– Uniform 4K-byte Sectors / 64K-byte Blocks
Low Power Consumption, Wide
Temperature Range
– Single 2.7 to 3.6V supply
– 5mA active current, 1µA Power-down (typ)
– -40° to +85°C operating range
SPI with Single or Dual Outputs
– Clock, Chip Select, Data I/O, Data Out
– Optional Hold function for SPI flexibility
Software and Hardware Write Protection
– Write-Protect all or portion of memory
– Enable/Disable protection with /WP pin
– Top or bottom array protection
Data Transfer up to 200M-bits / second
– Clock operation to 100MHz
– Fast Read Dual Output instruction
– Auto-increment Read capability
Space Efficient Packaging
– 8-pin SOIC 150-mil(1)
– 8-pin SOIC 208-mil
– 8-pin PDIP 300-mil
– 16-pin SOIC 300-mil
– 8-pad WSON 6x5-mm
Flexible Architecture with 4KB sectors
– Sector Erase (4K-bytes)
– Block Erase (64K-byte)
– Page program up to 256 bytes <2ms
– More than 100,000 erase/write cycles
– More than 20-year data retention
Note 1: Package type SN (SOIC8 150mil) is a special order package, please contact Winbond for ordering information.
-4-
W25X16A
3
PIN CONFIGURATION SOIC 150-MIL
Figure 1a. W25X16A Pin Assignments, 8-pin SOIC 150-mil (Package Code SN)
4
PIN CONFIGURATION SOIC 208-MIL
Figure 1b. W25X16A Pin Assignments, 8-pin SOIC 208-mil (Package Code SS)
-5-
Publication Release Date: August 7, 2009
Revision B
W25X16A
5
PAD CONFIGURATION WSON 6X5-MM
Figure 1c. W25X16A Pad Assignments, 8-pad WSON 6x5-mm (Package Code ZP)
6
PIN CONFIGURATION PDIP 300-MIL
Figure 1d. W25X16A Pin Assignments, 8-pin PDIP 300-mil (Package Code DA)
-6-
W25X16A
7
8
PIN DESCRIPTION SOIC 150/208-MIL, PDIP 300-MIL, WSON 6X5
PIN NO.
PIN NAME
I/O
FUNCTION
1
/CS
I
Chip Select Input
2
DO
O
Data Output
3
/WP
I
Write Protect Input
4
GND
5
DIO
I/O
Data Input / Output
6
CLK
I
Serial Clock Input
7
/HOLD
I
Hold Input
8
VCC
Ground
Power Supply
PIN CONFIGURATION SOIC 300-MIL
Figure 1e. W25X16A Pin Assignments, 16-pin SOIC 300-mil (Package Code SF)
-7-
Publication Release Date: August 7, 2009
Revision B
W25X16A
9
PIN DESCRIPTION SOIC 300-MIL
PIN NO.
PIN NAME
I/O
FUNCTION
1
/HOLD
I
2
VCC
Power Supply
3
N/C
No Connect
4
N/C
No Connect
5
N/C
No Connect
6
N/C
No Connect
7
/CS
I
Chip Select Input
8
DO
O
Data Output
9
/WP
I
Write Protect Input
10
GND
Ground
11
N/C
No Connect
12
N/C
No Connect
13
N/C
No Connect
14
N/C
No Connect
15
DIO
I/O
Data Input / Output
16
CLK
I
Serial Clock Input
Hold Input
-8-
W25X16A
9.1
Package Types
At the time this datasheet was published not all package types had been finalized. Contact Winbond
to confirm availability of these packages before designing to this specification. W25X16A is offered in
an 8-pin plastic 150-mil width SOIC (package code SN), 208-mil width SOIC (package code SS), 6x5mm WSON (package code ZP), 16-pin plastic 300-mil width SOIC (package code SF) and 300-mil
DIP (package code DA). See figures 1a-e. Package diagrams and dimensions are illustrated at the
end of this datasheet.
9.2
Chip Select (/CS)
The SPI Chip Select (/CS) pin enables and disables the device operation. When /CS is high the device
is deselected and the Serial Data Output (DO) pin is at high impedance. When deselected, the
device’s power consumption will be at standby levels unless an internal erase, program or status
register cycle is in progress. When /CS is brought low the device will be selected, power consumption
will increase to active levels and instructions can be written to and data read from the device. After
power-up, /CS must transition from high to low before a new instruction will be accepted. The /CS
input must track the VCC supply level at power-up (see “Write Protection” and figure 20). If needed a
pull-up resister on /CS can be used to accomplish this.
9.3
Serial Data Output (DO)
The SPI Serial Data Output (DO) pin provides a means for data and status to be serially read from
(shifted out of) the device. Data is shifted out on the falling edge of the Serial Clock (CLK) input pin.
9.4
Write Protect (/WP)
The Write Protect (/WP) pin can be used to prevent the Status Register from being written. Used in
conjunction with the Status Register’s Block Protect (BP2, BP1, and BP0) bits and Status Register
Protect (SRP) bits, a portion or the entire memory array can be hardware protected. The /WP pin is
active low.
9.5
HOLD (/HOLD)
The /HOLD pin allows the device to be paused while it is actively selected. When /HOLD is brought
low, while /CS is low, the DO pin will be at high impedance and signals on the DIO and CLK pins will
be ignored (don’t care). When /HOLD is brought high, device operation can resume. The /HOLD
function can be useful when multiple devices are sharing the same SPI signals. (“See Hold function”)
9.6
Serial Clock (CLK)
The SPI Serial Clock Input (CLK) pin provides the timing for serial input and output operations. ("See
SPI Operations")
9.7
Serial Data Input / Output (DIO)
The SPI Serial Data Input/Output (DIO) pin provides a means for instructions, addresses and data to
be serially written to (shifted into) the device. Data is latched on the rising edge of the Serial Clock
(CLK) input pin. The DIO pin is also used as an output pin when the Fast Read Dual Output instruction
is executed.
-9-
Publication Release Date: August 7, 2009
Revision B
W25X16A
10 BLOCK DIAGRAM
Block Segmentation
xxFF00h
•
xxF000h
Sector 15 (4KB)
xxFFFFh
•
xxF0FFh
xxEF00h
•
xxE000h
Sector 14 (4KB)
xxEFFFh
•
xxE0FFh
xxDF00h
•
xxD000h
Sector 13 (4KB)
xxDFFFh
•
xxD0FFh
1FFF00h
•
1F0000h
xx2FFFh
•
xx20FFh
xx1F00h
•
xx1000h
Sector 1 (4KB)
xx1FFFh
•
xx10FFh
xx0F00h
•
xx0000h
Sector 0 (4KB)
xx0FFFh
•
xx00FFh
Write Control
Logic
Status
Register
10FF00h
•
100000h
Block 16 (64KB)
10FFFFh
•
1000FFh
0FFF00h
•
0F0000h
Block 15 (64KB)
0FFFFFh
•
0F00FFh
•
•
•
08FF00h
•
080000h
Block 8 (64KB)
08FFFFh
•
0800FFh
07FF00h
•
070000h
Block 7 (64KB)
07FFFFh
•
0700FFh
•
•
•
High Voltage
Generators
00FF00h
•
000000h
/HOLD
/CS
DIO
DO
SPI
Command &
Control Logic
Page Address
Latch / Counter
Beginning
Page Address
Block 0 (64KB)
00FFFFh
•
0000FFh
Ending
Page Address
Column Decode
And 256-Byte Page Buffer
Data
Byte Address
Latch / Counter
Figure 2. W25X16A Block Diagram
- 10 -
W25X16A
Sector 2 (4KB)
Write Protect Logic and Row Decode
xx2F00h
•
xx2000h
CLK
1FFFFFh
•
1F00FFh
•
•
•
•
•
•
/WP
Block 31 (64KB)
W25X16A
11 FUNCTIONAL DESCRIPTION
11.1 SPI OPERATIONS
11.1.1 SPI Modes
The W25X16A is accessed through an SPI compatible bus consisting of four signals: Serial Clock
(CLK), Chip Select (/CS), Serial Data Input/Output (DIO) and Serial Data Output (DO). Both SPI bus
operation Modes 0 (0,0) and 3 (1,1) are supported. The primary difference between Mode 0 and Mode
3 concerns the normal state of the CLK signal when the SPI bus master is in standby and data is not
being transferred to the Serial Flash. For Mode 0 the CLK signal is normally low. For Mode 3 the CLK
signal is normally high. In either case data input on the DIO pin is sampled on the rising edge of the
CLK. Data on the DO and DIO pins are clocked out on the falling edge of CLK.
11.1.2 Dual Output SPI
The W25X16A supports Dual output operation when using the "Fast Read with Dual Output" (3B hex)
instruction. This feature allows data to be transferred from the Serial Flash memory at twice the rate
possible with the standard SPI. This instruction is ideal for quickly downloading code from Flash to
RAM upon power-up (code-shadowing) or for applications that cache code-segments to RAM for
execution. The Dual output feature simply allows the SPI input pin to also serve as an output during
this instruction. All other operations use the standard SPI interface with single output signal.
11.1.3 Hold Function
The /HOLD signal allows the W25X16A operation to be paused while it is actively selected (when /CS
is low). The /HOLD function may be useful in cases where the SPI data and clock signals are shared
with other devices. For example, consider if the page buffer was only partially written when a priority
interrupt requires use of the SPI bus. In this case the /HOLD function can save the state of the
instruction and the data in the buffer so programming can resume where it left off once the bus is
available again.
To initiate a /HOLD condition, the device must be selected with /CS low. A /HOLD condition will
activate on the falling edge of the /HOLD signal if the CLK signal is already low. If the CLK is not
already low the /HOLD condition will activate after the next falling edge of CLK. The /HOLD condition
will terminate on the rising edge of the /HOLD signal if the CLK signal is already low. If the CLK is not
already low the /HOLD condition will terminate after the next falling edge of CLK.
During a /HOLD condition, the Serial Data Output (DO) is high impedance, and Serial Data
Input/Output (DIO) and Serial Clock (CLK) are ignored. The Chip Select (/CS) signal should be kept
active (low) for the full duration of the /HOLD operation to avoid resetting the internal logic state of the
device.
- 11 -
Publication Release Date: August 7, 2009
Revision B
W25X16A
11.2 WRITE PROTECTION
Applications that use non-volatile memory must take into consideration the possibility of noise and
other adverse system conditions that may compromise data integrity. To address this concern the
W25X16A provides several means to protect data from inadvertent writes.
11.2.1 Write Protect Features
Device resets when VCC is below threshold.
Time delay write disable after Power-up.
Write enable/disable instructions.
Automatic write disable after program and erase.
Software write protection using Status Register.
Hardware write protection using Status Register and /WP pin.
Write Protection using Power-down instruction.
Upon power-up or at power-down the W25X16A will maintain a reset condition while VCC is below the
threshold value of VWI, (See Power-up Timing and Voltage Levels and Figure 20). While reset, all
operations are disabled and no instructions are recognized. During power-up and after the VCC
voltage exceeds VWI, all program and erase related instructions are further disabled for a time delay of
tPUW. This includes the Write Enable, Page Program, Sector Erase, Block Erase, Chip Erase and the
Write Status Register instructions. Note that the chip select pin (/CS) must track the VCC supply level
at power-up until the VCC-min level and tVSL time delay is reached. If needed a pull-up resister on /CS
can be used to accomplish this.
After power-up the device is automatically placed in a write-disabled state with the Status Register
Write Enable Latch (WEL) set to a 0. A Write Enable instruction must be issued before a Page
Program, Sector Erase, Chip Erase or Write Status Register instruction will be accepted. After
completing a program, erase or write instruction the Write Enable Latch (WEL) is automatically
cleared to a write-disabled state of 0.
Software controlled write protection is facilitated using the Write Status Register instruction and setting
the Status Register Protect (SRP) and Block Protect (TB, BP2, BP1, and BP0) bits. These Status
Register bits allow a portion or all of the memory to be configured as read only. Used in conjunction
with the Write Protect (/WP) pin, changes to the Status Register can be enabled or disabled under
hardware control. See Status Register for further information.
Additionally, the Power-down instruction offers an extra level of write protection as all instructions are
ignored except for the Release Power-down instruction.
- 12 -
W25X16A
12 CONTROL AND STATUS REGISTERS
The Read Status Register instruction can be used to provide status on the availability of the Flash
memory array, if the device is write enabled or disabled, and the state of write protection. The Write
Status Register instruction can be used to configure the devices write protection features. See Figure 3.
12.1 STATUS REGISTER
12.1.1 BUSY
BUSY is a read only bit in the status register (S0) that is set to a 1 state when the device is executing
a Page Program, Sector Erase, Block Erase, Chip Erase or Write Status Register instruction. During
this time the device will ignore further instructions except for the Read Status Register instruction (see
tW, tPP, tSE, tBE, and tCE in AC Characteristics). When the program, erase or write status register
instruction has completed, the BUSY bit will be cleared to a 0 state indicating the device is ready for
further instructions.
12.1.2 Write Enable Latch (WEL)
Write Enable Latch (WEL) is a read only bit in the status register (S1) that is set to a 1 after executing
a Write Enable Instruction. The WEL status bit is cleared to a 0 when the device is write disabled. A
write disable state occurs upon power-up or after any of the following instructions: Write Disable, Page
Program, Sector Erase, Block Erase, Chip Erase and Write Status Register.
12.1.3 Block Protect Bits (BP2, BP1, BP0)
The Block Protect Bits (BP2, BP1, and BP0) are non-volatile read/write bits in the status register (S4,
S3, and S2) that provide Write Protection control and status. Block Protect bits can be set using the
Write Status Register Instruction (see tW in AC characteristics). All, none or a portion of the memory
array can be protected from Program and Erase instructions (see Status Register Memory Protection
table). The factory default setting for the Block Protection Bits is 0, none of the array protected. The
Block Protect bits can not be written to if the Status Register Protect (SRP) bit is set to 1 and the Write
Protect (/WP) pin is low.
12.1.4 Top/Bottom Block Protect (TB)
The Top/Bottom bit (TB) controls if the Block Protect Bits (BP2, BP1, BP0) protect from the Top
(TB=0) or the Bottom (TB=1) of the array as shown in the Status Register Memory Protection table.
The TB bit is non-volatile and the factory default setting is TB=0. The TB bit can be set with the Write
Status Register Instruction provided that the Write Enable instruction has been issued. The TB bit can
not be written to if the Status Register Protect (SRP) bit is set to 1 and the Write Protect (/WP) pin is
low.
- 13 -
Publication Release Date: August 7, 2009
Revision B
W25X16A
12.1.5 Reserved Bits
Status register bit location S6 is reserved for future use. Current devices will read 0 for this bit
location. It is recommended to mask out the reserved bit when testing the Status Register. Doing this
will ensure compatibility with future devices.
12.1.6 Status Register Protect (SRP)
The Status Register Protect (SRP) bit is a non-volatile read/write bit in status register (S7) that can be
used in conjunction with the Write Protect (/WP) pin to disable writes to status register. When the SRP
bit is set to a 0 state (factory default) the /WP pin has no control over status register. When the SRP
pin is set to a 1, the Write Status Register instruction is locked out while the /WP pin is low. When the
/WP pin is high the Write Status Register instruction is allowed.
Figure 3. Status Register Bit Locations
- 14 -
W25X16A
12.1.7 Status Register Memory Protection
STATUS REGISTER(1)
TB
BP2 BP1 BP0
x
0
0
0
0
0
1
1
1
1
1
x
0
0
0
0
1
1
0
0
0
1
1
1
0
0
1
1
0
0
0
1
1
0
0
1
0
1
0
1
0
1
1
0
1
0
1
x
W25X16A (16M-BIT) MEMORY PROTECTION
BLOCK(S)
ADDRESSES
DENSITY
NONE
31
30 and 31
28 thru 31
24 thru 31
16 thru 31
0
0 and 1
0 thru 3
0 thru 7
0 thru 15
0 thru 31
NONE
1F0000h - 1FFFFFh
1E0000h - 1FFFFFh
1C0000h - 1FFFFFh
180000h - 1FFFFFh
100000h - 1FFFFFh
000000h - 00FFFFh
000000h - 01FFFFh
000000h - 03FFFFh
000000h - 07FFFFh
000000h - 0FFFFFh
000000h - 1FFFFFh
NONE
64KB
128KB
256KB
512KB
1MB
64KB
128KB
256KB
512KB
1MB
2MB
PORTION
NONE
Upper 1/32
Upper 1/16
Upper 1/8
Upper 1/4
Upper 1/2
Lower 1/32
Lower 1/16
Lower 1/8
Lower 1/4
Lower 1/2
ALL
Note:
1. x = don’t care
- 15 -
Publication Release Date: August 7, 2009
Revision B
W25X16A
12.2 INSTRUCTIONS
The instruction set of the W25X16A consists of fifteen basic instructions that are fully controlled
through the SPI bus (see Instruction Set table). Instructions are initiated with the falling edge of Chip
Select (/CS). The first byte of data clocked into the DIO input provides the instruction code. Data on
the DIO input is sampled on the rising edge of clock with most significant bit (MSB) first.
Instructions vary in length from a single byte to several bytes and may be followed by address bytes,
data bytes, dummy bytes (don’t care), and in some cases, a combination. Instructions are completed
with the rising edge of edge /CS. Clock relative timing diagrams for each instruction are included in
figures 4 through 19. All read instructions can be completed after any clocked bit. However, all
instructions that Write, Program or Erase must complete on a byte boundary (CS driven high after a
full 8-bits have been clocked) otherwise the instruction will be terminated. This feature further protects
the device from inadvertent writes. Additionally, while the memory is being programmed or erased, or
when the Status Register is being written, all instructions except for Read Status Register will be
ignored until the program or erase cycle has completed.
12.2.1 Manufacturer and Device Identification
MANUFACTURER ID
(M7-M0)
Winbond Serial Flash
EFh
Device ID
(ID7-ID0)
(ID15-ID0)
Instruction
ABh, 90h
9Fh
W25X16A
14h
3015h
- 16 -
W25X16A
12.2.2 Instruction Set (1)
INSTRUCTION
NAME
BYTE 1 BYTE 2
CODE
Write Enable
06h
Write Disable
Read Status
Register
Write Status
Register
Read Data
04h
Fast Read
BYTE 3
BYTE 4
BYTE 5
BYTE 6
N-BYTES
05h
(S7–S0)(1)
(2)
01h
S7–S0
03h
A23–A16
A15–A8
A7–A0
(D7–D0)
(Next byte)
0Bh
A23–A16
A15–A8
A7–A0
dummy
(D7–D0)
(one byte
per 4 clocks,
continuous)
Up to 256
bytes
Fast Read Dual
Output
3Bh
A23–A16
A15–A8
A7–A0
dummy
I/O =
(D6,D4,D2,D0)
O=
(D7,D5,D3,D1)
Page Program
02h
A23–A16
A15–A8
A7–A0
(D7–D0)
(Next byte)
D8h
A23–A16
A15–A8
A7–A0
20h
A23–A16
A15–A8
A7–A0
ABh
dummy
dummy
dummy
(ID7-ID0)(4)
(M7-M0)
Block Erase
(64KB)
Sector Erase
(4KB)
Chip Erase
Power-down
Release Powerdown / Device ID
Manufacturer/
Device ID (3)
C7h
B9h
90h
dummy
dummy
00h
JEDEC ID
9Fh
(M7-M0)
Manufacturer
(ID15-ID8)
Memory
Type
(ID7-ID0)
Capacity
continuous
(Next Byte)
continuous
(ID7-ID0)
Notes:
1. Data bytes are shifted with Most Significant Bit first. Byte fields with data in parenthesis “( )” indicate data being
read from the device on the DO pin.
2. The Status Register contents will repeat continuously until /CS terminates the instruction.
3. See Manufacturer and Device Identification table for Device ID information.
4. The Device ID will repeat continuously until /CS terminates the instruction.
- 17 -
Publication Release Date: August 7, 2009
Revision B
W25X16A
12.2.3 Write Enable (06h)
The Write Enable instruction (Figure 4) sets the Write Enable Latch (WEL) bit in the Status Register to
a 1. The WEL bit must be set prior to every Page Program, Sector Erase, Block Erase, Chip Erase
and Write Status Register instruction. The Write Enable instruction is entered by driving /CS low,
shifting the instruction code “06h” into the Data Input (DI) pin on the rising edge of CLK, and then
driving /CS high.
Figure 4. Write Enable Instruction Sequence Diagram
12.2.4 Write Disable (04h)
The Write Disable instruction (Figure 5) resets the Write Enable Latch (WEL) bit in the Status Register
to a 0. The Write Disable instruction is entered by driving /CS low, shifting the instruction code “04h”
into the DIO pin and then driving /CS high. Note that the WEL bit is automatically reset after Power-up
and upon completion of the Write Status Register, Page Program, Sector Erase, Block Erase and
Chip Erase instructions.
Figure 5. Write Disable Instruction Sequence Diagram
- 18 -
W25X16A
12.2.5 Read Status Register (05h)
The Read Status Register instruction allows the 8-bit Status Register to be read. The instruction is
entered by driving /CS low and shifting the instruction code “05h” into the DIO pin on the rising edge of
CLK. The status register bits are then shifted out on the DO pin at the falling edge of CLK with most
significant bit (MSB) first as shown in figure 6. The Status Register bits are shown in figure 3 and
include the BUSY, WEL, BP2-BP0, TB and SRP bits (see description of the Status Register earlier in
this datasheet).
The Status Register instruction may be used at any time, even while a Program, Erase or Write Status
Register cycle is in progress. This allows the BUSY status bit to be checked to determine when the
cycle is complete and if the device can accept another instruction. The Status Register can be read
continuously, as shown in Figure 6. The instruction is completed by driving /CS high.
Figure 6. Read Status Register Instruction Sequence Diagram
- 19 -
Publication Release Date: August 7, 2009
Revision B
W25X16A
12.2.6 Write Status Register (01h)
The Write Status Register instruction allows the Status Register to be written. A Write Enable
instruction must previously have been executed for the device to accept the Write Status Register
Instruction (Status Register bit WEL must equal 1). Once write enabled, the instruction is entered by
driving /CS low, sending the instruction code “01h”, and then writing the status register data byte as
illustrated in figure 7. The Status Register bits are shown in figure 3 and described earlier in this
datasheet.
Only non-volatile Status Register bits SRP, TB, BP2, BP1 and BP0 (bits 7, 5, 4, 3 and 2) can be
written to. All other Status Register bit locations are read-only and will not be affected by the Write
Status Register instruction.
The /CS pin must be driven high after the eighth bit of the last byte has been latched. If this is not
done the Write Status Register instruction will not be executed. After /CS is driven high, the self-timed
Write Status Register cycle will commence for a time duration of tW (See AC Characteristics). While
the Write Status Register cycle is in progress, the Read Status Register instruction may still accessed
to check the status of the BUSY bit. The BUSY bit is a 1 during the Write Status Register cycle and a
0 when the cycle is finished and ready to accept other instructions again. After the Write Register
cycle has finished the Write Enable Latch (WEL) bit in the Status Register will be cleared to 0.
The Write Status Register instruction allows the Block Protect bits (TB, BP2, BP1 and BP0) to be set
for protecting all, a portion, or none of the memory from erase and program instructions. Protected
areas become read-only (see Status Register Memory Protection table). The Write Status Register
instruction also allows the Status Register Protect bit (SRP) to be set. This bit is used in conjunction
with the Write Protect (/WP) pin to disable writes to the status register. When the SRP bit is set to a 0
state (factory default) the /WP pin has no control over the status register. When the SRP pin is set to a
1, the Write Status Register instruction is locked out while the /WP pin is low. When the /WP pin is
high the Write Status Register instruction is allowed.
Figure 7. Write Status Register Instruction Sequence Diagram
- 20 -
W25X16A
12.2.7 Read Data (03h)
The Read Data instruction allows one more data bytes to be sequentially read from the memory. The
instruction is initiated by driving the /CS pin low and then shifting the instruction code “03h” followed
by a 24-bit address (A23-A0) into the DIO pin. The code and address bits are latched on the rising
edge of the CLK pin. After the address is received, the data byte of the addressed memory location
will be shifted out on the DO pin at the falling edge of CLK with most significant bit (MSB) first. The
address is automatically incremented to the next higher address after each byte of data is shifted out
allowing for a continuous stream of data. This means that the entire memory can be accessed with a
single instruction as long as the clock continues. The instruction is completed by driving /CS high. The
Read Data instruction sequence is shown in figure 8. If a Read Data instruction is issued while an
Erase, Program or Write cycle is in process (BUSY=1) the instruction is ignored and will not have any
effects on the current cycle. The Read Data instruction allows clock rates from D.C. to a maximum of
fR (see AC Electrical Characteristics).
Figure 8. Read Data Instruction Sequence Diagram
- 21 -
Publication Release Date: August 7, 2009
Revision B
W25X16A
12.2.8 Fast Read (0Bh)
The Fast Read instruction is similar to the Read Data instruction except that it can operate at the
highest possible frequency of FR (see AC Electrical Characteristics). This is accomplished by adding
eight “dummy” clocks after the 24-bit address as shown in figure 9. The dummy clocks allow the
devices internal circuits additional time for setting up the initial address. During the dummy clocks the
data value on the DIO pin is a “don’t care”.
Figure 9. Fast Read Instruction Sequence Diagram
- 22 -
W25X16A
12.2.9 Fast Read Dual Output (3Bh)
The Fast Read Dual Output (3Bh) instruction is similar to the standard Fast Read (0Bh) instruction
except that data is output on two pins, DO and DIO, instead of just DO. This allows data to be
transferred from the W25X16A at twice the rate of standard SPI devices. The Fast Read Dual Output
instruction is ideal for quickly downloading code from Flash to RAM upon power-up or for applications
that cache code-segments to RAM for execution.
Similar to the Fast Read instruction, the Fast Read Dual Output instruction can operate at the highest
possible frequency of FR (see AC Electrical Characteristics). This is accomplished by adding eight
“dummy” clocks after the 24-bit address as shown in figure 10. The dummy clocks allow the device's
internal circuits additional time for setting up the initial address. The input data during the dummy
clocks is “don’t care”. However, the DIO pin should be high-impedance prior to the falling edge of the
first data out clock.
Figure 10. Fast Read Dual Output Instruction Sequence Diagram
- 23 -
Publication Release Date: August 7, 2009
Revision B
W25X16A
12.2.10 Page Program (02h)
The Page Program instruction allows up to 256 bytes of data to be programmed at previously erased
to all 1s (FFh) memory locations. A Write Enable instruction must be executed before the device will
accept the Page Program Instruction (Status Register bit WEL must equal 1). The instruction is
initiated by driving the /CS pin low then shifting the instruction code “02h” followed by a 24-bit address
(A23-A0) and at least one data byte, into the DIO pin. The /CS pin must be held low for the entire
length of the instruction while data is being sent to the device. The Page Program instruction
sequence is shown in figure 11.
If an entire 256 byte page is to be programmed, the last address byte (the 8 least significant address
bits) should be set to 0. If the last address byte is not zero, and the number of clocks exceed the
remaining page length, the addressing will wrap to the beginning of the page. In some cases, less
than 256 bytes (a partial page) can be programmed without having any effect on other bytes within the
same page. One condition to perform a partial page program is that the number of clocks can not
exceed the remaining page length. If more than 256 bytes are sent to the device the addressing will
wrap to the beginning of the page and overwrite previously sent data.
As with the write and erase instructions, the /CS pin must be driven high after the eighth bit of the last
byte has been latched. If this is not done the Page Program instruction will not be executed. After /CS
is driven high, the self-timed Page Program instruction will commence for a time duration of tpp (See
AC Characteristics). While the Page Program cycle is in progress, the Read Status Register
instruction may still be accessed for checking the status of the BUSY bit. The BUSY bit is a 1 during
the Page Program cycle and becomes a 0 when the cycle is finished and the device is ready to accept
other instructions again. After the Page Program cycle has finished the Write Enable Latch (WEL) bit
in the Status Register is cleared to 0. The Page Program instruction will not be executed if the
addressed page is protected by the Block Protect (BP2, BP1, and BP0) bits (see Status Register
Memory Protection table).
Figure 11. Page Program Instruction Sequence Diagram
- 24 -
W25X16A
12.2.11 Sector Erase (20h)
The Sector Erase instruction sets all memory within a specified sector (4K-bytes) to the erased state
of all 1s (FFh). A Write Enable instruction must be executed before the device will accept the Sector
Erase Instruction (Status Register bit WEL must equal 1). The instruction is initiated by driving the /CS
pin low and shifting the instruction code “20h” followed a 24-bit sector address (A23-A0) (see Figure
2). The Sector Erase instruction sequence is shown in figure 12.
The /CS pin must be driven high after the eighth bit of the last byte has been latched. If this is not
done the Sector Erase instruction will not be executed. After /CS is driven high, the self-timed Sector
Erase instruction will commence for a time duration of tSE (See AC Characteristics). While the Sector
Erase cycle is in progress, the Read Status Register instruction may still be accessed for checking the
status of the BUSY bit. The BUSY bit is a 1 during the Sector Erase cycle and becomes a 0 when the
cycle is finished and the device is ready to accept other instructions again. After the Sector Erase
cycle has finished the Write Enable Latch (WEL) bit in the Status Register is cleared to 0. The Sector
Erase instruction will not be executed if the addressed page is protected by the Block Protect (TB,
BP2, BP1, and BP0) bits (see Status Register Memory Protection table).
Figure 12. Sector Erase Instruction Sequence Diagram
- 25 -
Publication Release Date: August 7, 2009
Revision B
W25X16A
12.2.12 Block Erase (D8h)
The Block Erase instruction sets all memory within a specified block (64K-bytes) to the erased state of
all 1s (FFh). A Write Enable instruction must be executed before the device will accept the Block
Erase Instruction (Status Register bit WEL must equal 1). The instruction is initiated by driving the /CS
pin low and shifting the instruction code “D8h” followed a 24-bit block address (A23-A0) (see Figure
2). The Block Erase instruction sequence is shown in figure 13.
The /CS pin must be driven high after the eighth bit of the last byte has been latched. If this is not
done the Block Erase instruction will not be executed. After /CS is driven high, the self-timed Block
Erase instruction will commence for a time duration of tBE (See AC Characteristics). While the Block
Erase cycle is in progress, the Read Status Register instruction may still be accessed for checking the
status of the BUSY bit. The BUSY bit is a 1 during the Block Erase cycle and becomes a 0 when the
cycle is finished and the device is ready to accept other instructions again. After the Block Erase cycle
has finished the Write Enable Latch (WEL) bit in the Status Register is cleared to 0. The Block Erase
instruction will not be executed if the addressed page is protected by the Block Protect (TB, BP2, BP1,
and BP0) bits (see Status Register Memory Protection table).
Figure 13. Block Erase Instruction Sequence Diagram
- 26 -
W25X16A
12.2.13 Chip Erase (C7h)
The Chip Erase instruction sets all memory within the device to the erased state of all 1s (FFh). A
Write Enable instruction must be executed before the device will accept the Chip Erase Instruction
(Status Register bit WEL must equal 1). The instruction is initiated by driving the /CS pin low and
shifting the instruction code “C7h”. The Chip Erase instruction sequence is shown in figure 14.
The /CS pin must be driven high after the eighth bit has been latched. If this is not done the Chip
Erase instruction will not be executed. After /CS is driven high, the self-timed Chip Erase instruction
will commence for a time duration of tCE (See AC Characteristics). While the Chip Erase cycle is in
progress, the Read Status Register instruction may still be accessed to check the status of the BUSY
bit. The BUSY bit is a 1 during the Chip Erase cycle and becomes a 0 when finished and the device is
ready to accept other instructions again. After the Chip Erase cycle has finished the Write Enable
Latch (WEL) bit in the Status Register is cleared to 0. The Chip Erase instruction will not be executed
if any page is protected by the Block Protect (BP2, BP1, and BP0) bits (see Status Register Memory
Protection table).
Figure 14. Chip Erase Instruction Sequence Diagram
- 27 -
Publication Release Date: August 7, 2009
Revision B
W25X16A
12.2.14 Power-down (B9h)
Although the standby current during normal operation is relatively low, standby current can be further
reduced with the Power-down instruction. The lower power consumption makes the Power-down
instruction especially useful for battery powered applications (See ICC1 and ICC2 in AC
Characteristics). The instruction is initiated by driving the /CS pin low and shifting the instruction code
“B9h” as shown in figure 15.
The /CS pin must be driven high after the eighth bit has been latched. If this is not done the Powerdown instruction will not be executed. After /CS is driven high, the power-down state will entered
within the time duration of tDP (See AC Characteristics). While in the power-down state only the
Release from Power-down / Device ID instruction, which restores the device to normal operation, will
be recognized. All other instructions are ignored. This includes the Read Status Register instruction,
which is always available during normal operation. Ignoring all but one instruction makes the Power
Down state a useful condition for securing maximum write protection. The device always powers-up in
the normal operation with the standby current of ICC1.
Figure 15. Deep Power-down Instruction Sequence Diagram
- 28 -
W25X16A
12.2.15 Release Power-down / Device ID (ABh)
The Release from Power-down / Device ID instruction is a multi-purpose instruction. It can be used to
release the device from the power-down state, obtain the devices electronic identification (ID) number
or do both.
When used only to release the device from the power-down state, the instruction is issued by driving
the /CS pin low, shifting the instruction code “ABh” and driving /CS high as shown in figure 16. After
the time duration of tRES1 (See AC Characteristics) the device will resume normal operation and other
instructions will be accepted. The /CS pin must remain high during the tRES1 time duration.
When used only to obtain the Device ID while not in the power-down state, the instruction is initiated
by driving the /CS pin low and shifting the instruction code “ABh” followed by 3-dummy bytes. The
Device ID bits are then shifted out on the falling edge of CLK with most significant bit (MSB) first as
shown in figure 17. The Device ID value for the W25X16A is listed in Manufacturer and Device
Identification table. The Device ID can be read continuously. The instruction is completed by driving
/CS high.
When used to release the device from the power-down state and obtain the Device ID, the instruction
is the same as previously described, and shown in figure 17, except that after /CS is driven high it
must remain high for a time duration of tRES2 (See AC Characteristics). After this time duration the
device will resume normal operation and other instructions will be accepted.
If the Release from Power-down / Device ID instruction is issued while an Erase, Program or Write
cycle is in process (when BUSY equals 1) the instruction is ignored and will not have any effects on
the current cycle
Figure 16. Release Power-down Instruction Sequence
- 29 -
Publication Release Date: August 7, 2009
Revision B
W25X16A
Figure 17. Release Power-down / Device ID Instruction Sequence Diagram
- 30 -
W25X16A
12.2.16 Read Manufacturer / Device ID (90h)
The Read Manufacturer/Device ID instruction is an alternative to the Release from Power-down /
Device ID instruction that provides both the JEDEC assigned manufacturer ID and the specific device
ID.
The Read Manufacturer/Device ID instruction is very similar to the Release from Power-down / Device
ID instruction. The instruction is initiated by driving the /CS pin low and shifting the instruction code
“90h” followed by a 24-bit address (A23-A0) of 000000h. After which, the Manufacturer ID for Winbond
(EFh) and the Device ID are shifted out on the falling edge of CLK with most significant bit (MSB) first
as shown in figure 18. The Device ID value for the W25X16A is listed in Manufacturer and Device
Identification table. If the 24-bit address is initially set to 000001h the Device ID will be read first and
then followed by the Manufacturer ID. The Manufacturer and Device IDs can be read continuously,
alternating from one to the other. The instruction is completed by driving /CS high.
Figure 18. Read Manufacturer / Device ID Diagram
- 31 -
Publication Release Date: August 7, 2009
Revision B
W25X16A
12.2.17 JEDEC ID (9Fh)
For compatibility reasons, the W25X16A provides several instructions to electronically determine the
identity of the device. The Read JEDEC ID instruction is compatible with the JEDEC standard for SPI
compatible serial memories that was adopted in 2003.
The instruction is initiated by driving the /CS pin low and shifting the instruction code “9Fh”. The
JEDEC assigned Manufacturer ID byte for Winbond (EFh) and two Device ID bytes, Memory Type
(ID15-ID8) and Capacity (ID7-ID0) are then shifted out on the falling edge of CLK with most significant
bit (MSB) first as shown in figure 19. For memory type and capacity values refer to Manufacturer and
Device Identification table.
Figure 19. Read JEDEC ID
- 32 -
W25X16A
13 ELECTRICAL CHARACTERISTICS
13.1 Absolute Maximum Ratings (1)
PARAMETERS
SYMBOL
Supply Voltage
VCC
Voltage applied to any Pin
VIO
Transient Voltage on any Pin
VIOT
Storage Temperature
Lead Temperature
Electrostatic Discharge Voltage
CONDITIONS
RANGE
UNIT
–0.6 to +4.0
V
Relative to Ground
–0.6 to VCC +0.4
V
<20nS Transient
Relative to Ground
–2.0V to VCC+2.0V
V
TSTG
–65 to +150
°C
TLEAD
See Note (2)
°C
–2000 to +2000
V
VESD
Human Body
Model(3)
Notes:
1. This device has been designed and tested for the specified operation ranges. Proper operation
outside of these levels is not guaranteed. Exposure to absolute maximum ratings may affect device
reliability. Exposure beyond absolute maximum ratings may cause permanent damage.
2. Compliant with JEDEC Standard J-STD-20C for small body Sn-Pb or Pb-free (Green) assembly
and the European directive on restrictions on hazardous substances (RoHS) 2002/95/EU.
3. JEDEC Std JESD22-A114A (C1=100 pF, R1=1500 ohms, R2=500 ohms).
13.2 Operating Ranges
PARAMETER
Supply Voltage
Ambient Temperature,
Operating
SYMBOL
VCC
TA
SPEC
CONDITIONS
MIN
MAX
F R0 = 75MHz, fR = 50MHz
2.7
3.6
F R1 = 100MHz, fR = 50MHz
3.0
3.6
Industrial
–40
+85
0
+70
(1)
Commercial
UNIT
V
°C
Note:
1. Commercial temperature only applies to Fast Read (F R1 ) and 100K cycles endurance for 4K byte
sectors . Industrial temperature applies to all other parameters.
- 33 -
Publication Release Date: August 7, 2009
Revision B
W25X16A
13.3 Power-up Timing and Write Inhibit Threshold
SPEC
PARAMETER
SYMBOL
VCC (min) to /CS Low
tVSL(1)
10
Time Delay Before Write Instruction
tPUW
1
10
ms
Write Inhibit Threshold Voltage
VWI
1
2
V
(1)
(1)
MIN
Note:
1. These parameters are characterized only.
Figure 20. Power-up Timing and Voltage Levels
- 34 -
MAX
UNIT
µs
W25X16A
13.4 DC Electrical Characteristics
SPEC
PARAMETER
SYMBOL
CONDITIONS
Input Capacitance
CIN(1)
VIN = 0V(2)
6
pF
Output Capacitance
Cout(1)
VOUT = 0V(2)
8
pF
Input Leakage
ILI
±2
µA
I/O Leakage
ILO
±2
µA
Standby Current
ICC1
/CS = VCC,
VIN = GND or VCC
25
50
µA
Power-down Current
ICC2
/CS = VCC,
VIN = GND or VCC
<1
10
µA
Current Read Data /
Dual Output Read
ICC3
C = 0.1 VCC / 0.9 VCC
DO = Open
5/6
7/8
mA
ICC3
C = 0.1 VCC / 0.9 VCC
DO = Open
7/8
11/12
mA
ICC3
C = 0.1 VCC / 0.9 VCC
DO = Open
9/10
13/15
mA
ICC3
C = 0.1 VCC / 0.9 VCC
DO = Open
13/14
18/20
mA
Current Page
Program
ICC4
/CS = VCC
20
25
mA
Current Write Status
Register
ICC5
/CS = VCC
10
18
mA
Current Sector/Block
Erase
ICC6
/CS = VCC
20
25
mA
Current Chip Erase
ICC7
/CS = VCC
20
25
mA
Input Low Voltage
VIL
–0.5
VCC x 0.3
V
Input High Voltage
VIH
VCC x0.7
VCC +0.4
V
Output Low Voltage
VOL
IOL = 1.6 mA
0.4
V
Output High Voltage
VOH
IOH = –100 µA
1MHz(2)
Current Read Data /
Dual Output Read
33MHz(2)
Current Read Data /
Dual Output Read
50MHz(2)
Current Read Data /
Dual Output Read
100MHz
(2)
MIN
TYP
VCC –0.2
MAX
UNIT
V
Notes:
1. Tested on sample basis and specified through design and characterization data. TA=25° C, VCC 3V.
2. Checker Board Pattern.
- 35 -
Publication Release Date: August 7, 2009
Revision B
W25X16A
13.5 AC Measurement Conditions
PARAMETER
SYMBOL
Load Capacitance
SPEC
MIN
30
CL
Load Capacitance for FR 1 only
Input Rise and Fall Times
15
TR, TF
Input Pulse Voltages
Input Timing Reference Voltages
Output Timing Reference Voltages
MAX
5
UNIT
pF
ns
VIN
0.2 VCC to 0.8 VCC
V
IN
0.3 VCC to 0.7 VCC
V
OUT
0.5 VCC to 0.5 VCC
V
Note:
1. Output Hi-Z is defined as the point where data out is no longer driven.
Figure 21. AC Measurement I/O Waveform
- 36 -
W25X16A
13.6 AC Electrical Characteristics
DESCRIPTION
SYMBOL
SPEC
ALT
MIN
Clock frequency
for all instructions, except Read Data (03h)
2.7V-3.6V VCC & Industrial Temperature
TYP
UNIT
MAX
F R0
f C0
D.C.
75
MHz
F R1 (4)
f C1
D.C.
100
MHz
fR
D.C.
50
MHz
Clock High, Low Time, for Fast Read (0Bh, 3Bh) /
other instructions except Read Data (03h)
tCLH,
tCLL(1)
4.5
ns
Clock High, Low Time for Read Data (03h)
instruction
tCRLH,
tCRLL(1)
8
ns
Clock Rise Time peak to peak
tCLCH(2)
0.1
V/ns
Clock Fall Time peak to peak
tCHCL(2)
0.1
V/ns
5
ns
5
ns
Clock frequency, for Fast Read (0Bh, 3Bh) only
3.0V-3.6V VCC & Commercial Temperature
Clock freq. Read Data instruction 03h
/CS Active Setup Time relative to CLK
tSLCH
/CS Not Active Hold Time relative to CLK
tCHSL
Data In Setup Time
tDVCH
tDSU
2
ns
Data In Hold Time
tCHDX
tDH
5
ns
/CS Active Hold Time relative to CLK
tCHSH
5
ns
/CS Not Active Setup Time relative to CLK
tSHCH
5
ns
/CS Deselect Time (for Array Read Array Read /
Erase or Program Read Status Register)
tSHSL
tCSH
50/100
ns
tSHQZ(2)
tDIS
7
ns
Clock Low to Output Valid
2.7V-3.6V / 3.0V-3.6V
tCLQV
tV
7/6
ns
Output Hold Time
tCLQX
tHO
Output Disable Time
tCSS
0
ns
Continued – next page
- 37 -
Publication Release Date: August 7, 2009
Revision B
W25X16A
13.7 AC Electrical Characteristics (cont’d)
DESCRIPTION
SYMBOL
SPEC
ALT
MIN
TYP
UNIT
MAX
/HOLD Active Setup Time relative to CLK
tHLCH
5
ns
/HOLD Active Hold Time relative to CLK
tCHHH
5
ns
/HOLD Not Active Setup Time relative to CLK
tHHCH
5
ns
/HOLD Not Active Hold Time relative to CLK
tCHHL
5
ns
/HOLD to Output Low-Z
tHHQX(2)
tLZ
7
ns
/HOLD to Output High-Z
tHLQZ(2)
tHZ
12
ns
Write Protect Setup Time Before /CS Low
tWHSL(3)
20
ns
Write Protect Hold Time After /CS High
tSHWL(3)
100
ns
/CS High to Power-down Mode
tDP(2)
3
µs
/CS High to Standby Mode without Electronic
Signature Read
tRES1(2)
3
µs
/CS High to Standby Mode with Electronic
Signature Read
tRES2(2)
1.8
µs
Write Status Register Time
tW
10
15
ms
Byte Program Time (First Byte) (5)
t BP1
30
50
µs
Additional Byte Program Time (After First Byte) (5)
t BP2
6
12
µs
Page Program Time
tPP
1.6
3
ms
Sector Erase Time (4KB)
tSE
120
200
ms
Block Erase Time (64KB)
tBE
0.32
1
s
Chip Erase Time
tCE
10
20
s
Notes:
1.
2.
3.
4.
5.
Clock high + Clock low must be less than or equal to 1/fC.
Value guaranteed by design and/or characterization, not 100% tested in production.
Only applicable as a constraint for a Write Status Register instruction when Sector Protect Bit is set to 1.
Commercial temperature only applies to Fast Read (F R1 ). Industrial temperature applies to all other parameters.
For multiple bytes after first byte within a page, t BPN = t BP1 + t BP2 * N (typical) and t BPN = t BP1 + t BP2 * N (max), where
N = number of bytes programmed.
- 38 -
W25X16A
13.8 Serial Output Timing
13.9
13.10
Input Timing
Hold Timing
- 39 -
Publication Release Date: August 7, 2009
Revision B
W25X16A
14
PACKAGE SPECIFICATION
14.1 8-Pin SOIC 150-mil (Package Code SN)
8
5
c
E
HE
L
1
4
0.25
D
O
A
Y
e
SEATING PLANE
SYMBOL
A
A1
b
c
E(3)
D(3)
e(2)
HE
Y(4)
L
GAUGE PLANE
A1
b
MILLIMETERS
Min
Max
1.35
0.10
0.33
0.19
3.80
4.80
1.75
0.25
0.51
0.25
4.00
5.00
1.27 BSC
5.80
0.40
0°
6.20
0.10
1.27
10°
INCHES
Min
Max
0.053
0.069
0.004
0.010
0.013
0.020
0.008
0.010
0.150
0.157
0.188
0.196
0.050 BSC
0.228
0.244
0.004
0.016
0.050
0°
10°
Notes:
1. Controlling dimensions: millimeters, unless otherwise specified.
2. BSC = Basic lead spacing between centers.
3. Dimensions D and E do not include mold flash protrusions and should be measured from the bottom of the package.
4. Formed leads coplanarity with respect to seating plane shall be within 0.004 inches.
- 40 -
W25X16A
θ
14.2 8-Pin SOIC 208-mil (Package Code SS)
SYMBOL
A
A1
A2
b
C
D
D1
E
E1
e
H
L
y
θ
MILLIMETERS
INCHES
MIN
NOM
MAX
MIN
NOM
MAX
1.75
0.05
1.70
0.35
0.19
5.18
5.13
5.18
5.13
1.95
0.15
1.80
0.42
0.20
5.28
5.23
5.28
5.23
1.27 BSC
7.90
0.65
-
2.16
0.25
1.91
0.48
0.25
5.38
5.33
5.38
5.33
0.069
0.002
0.067
0.014
0.007
0.204
0.202
0.204
0.202
0.085
0.010
0.075
0.019
0.010
0.212
0.210
0.212
0.210
8.10
0.80
0.010
8°
0.303
0.020
0°
0.077
0.006
0.071
0.017
0.008
0.208
0.206
0.208
0.206
0.050 BSC
0.311
0.026
-
7.70
0.50
0°
0.319
0.031
0.004
8°
Notes:
1. Controlling dimensions: millimeters, unless otherwise specified.
2. BSC = Basic lead spacing between centers.
3. Dimensions D1 and E1 do not include mold flash protrusions and should be measured from the bottom of the package.
4. Formed leads coplanarity with respect to seating plane shall be within 0.004 inches.
- 41 -
Publication Release Date: August 7, 2009
Revision B
W25X16A
14.3 8-Pin PDIP 300-mil (Package Code DA)
D
8
5
E1
1
4
B
B
1
E
S
c
A1
A A2
Base Plane
L
Seating Plane
e1
eA
α
Symbol
Millimeters
Min
Inches
Typ.
Max
Min
Typ.
Max
0.175
A
---
---
4.45
---
---
A1
0.25
---
---
0.010
---
---
A2
3.18
3.30
3.43
0.125
0.130
0.135
B
0.41
0.46
0.56
0.016
0.018
0.022
B1
1.47
1.52
1.63
0.058
0.060
0.064
c
0.20
0.25
0.36
0.008
0.010
0.014
D
-
9.14
9.65
-
0.360
0.380
0.310
E
7.37
7.62
7.87
0.290
0.300
E1
6.22
6.35
6.48
0.245
0.250
0.255
e1
2.29
2.54
2.79
0.090
0.100
0.110
0.140
L
3.05
3.30
3.56
0.120
0.130
α
0
-
15
0
-
15
eA
8.51
9.02
9.53
0.335
0.355
0.375
- 42 -
W25X16A
14.4 8-Contact 6x5mm WSON (Package Code ZP)
SYMBOL
MILLIMETERS
INCHES
MIN
TYP.
MAX
MIN
TYP.
MAX
A
0.70
0.75
0.80
0.0275
0.0295
0.0314
A1
0.00
0.02
0.05
0.0000
0.0007
0.0019
b
0.35
0.40
0.48
0.0137
0.0157
0.0188
C
-
0.20 REF.
-
-
0.0078 REF.
-
D
5.90
6.00
6.10
0.2322
0.2362
0.2401
D2
3.35
3.40
3.45
0.1318
0.1338
0.1358
E
4.90
5.00
5.10
0.1929
0.1968
0.2007
E2
4.25
4.30
4.35
0.1673
0.1692
0.1712
E(2)
1.27 BSC
0.0500 BSC
L
0.55
0.60
0.65
0.0216
0.0236
0.0255
y
0.00
-
0.75
0.0000
-
0.0029
- 43 -
Publication Release Date: August 7, 2009
Revision B
W25X16A
8-Contact 6x5mm WSON Cont’d.
SYMBOL
MILLIMETERS
MIN
TYP.
INCHES
MAX
MIN
TYP.
MAX
SOLDER PATTERN
M
3.40
0.1338
N
4.30
0.1692
P
6.00
0.2360
Q
0.50
0.0196
R
0.75
0.0255
Notes:
1. Advanced Packaging Information; please contact Winbond for the latest minimum and maximum specifications.
2. BSC = Basic lead spacing between centers.
3. Dimensions D and E do not include mold flash protrusions and should be measured from the bottom of the package.
4. The metal pad area on the bottom center of the package is connected to the device ground (GND pin). Avoid placement of
exposed PCB vias under the pad.
- 44 -
W25X16A
14.5 16-Pin SOIC 300-mil (Package Code SF)
SYMBOL
A
A1
A2
b
C
D
E
E1
MILLIMETERS
MIN
NOM
MAX
MIN
NOM
MAX
2.36
0.10
0.33
0.18
10.08
10.01
7.39
2.49
2.31
0.41
0.23
10.31
10.31
7.49
2.64
0.30
0.51
0.28
10.49
10.64
7.59
0.093
0.004
0.013
0.007
0.397
0.394
0.291
0.098
0.091
0.016
0.009
0.406
0.406
0.295
0.104
0.012
0.020
0.011
0.413
0.419
0.299
1.27
0.076
8°
0.015
0°
2
E
L
y
θ
INCHES
1.27 BSC
0.38
0°
0.81
-
0.50 BSC
0.032
-
0.050
0.003
8°
Notes:
1. Controlling dimensions: inches, unless otherwise specified.
2. BSC = Basic lead spacing between centers.
3. Dimensions D and E1 do not include mold flash protrusions and should be measured from the bottom of the package.
- 45 -
Publication Release Date: August 7, 2009
Revision B
W25X16A
15
ORDERING INFORMATION (1)
16A
V
=
=
16M-bit
2.7V to 3.6V
SN
SS
SF
DA
ZP
=
=
=
=
=
8-pin SOIC 150-mil
8-pin SOIC 208-mil
16-pin SOIC 300-mil
8-pin DIP 300-mil
8-pad WSON 6x5mm
I
=
Industrial (-40ºC ~ +8º5C)
(Blank) Standard
G, Z =
Green Package (Lead-free, RoHS Compliant, Halogen-free (TBBA), Antimony-Oxide-free Sb 2 O 3 )
Notes:
nd
1a. Only the 2
letter is used for the part marking; WSON package type ZP is not used for the top marking.
1b. Standard bulk shipments are in Tube (shape E). Please specify alternate packing method, such as Tape
and Reel (shape T), when placing orders.
1c. The “W” prefix is not included on the part marking.
2.
SOIC-8 150mil is a Winbond Special Order.
- 46 -
W25X16A
15.1 Valid Part Numbers and Top Side Marking
The following table provides the valid part numbers for the 25X16A SpiFlash Memory. Please contact
Winbond for specific availability by density and package type. Winbond SpiFlash memories use an 11digit Product Number for ordering. However, due to limited space, the Top Side Marking on all
packages use an abbreviated 9-digit number.
PACKAGE TYPE
DENSITY
PRODUCT NUMBER
TOP SIDE MARKING
16M-bit
W25X16AVSNIG
25X16AVNIG
16M-bit
W25X16AVSSIG
25X16AVSIG
16M-bit
W25X16AVSFIG
25X16AVFIG
16M-bit
W25X16AVZPIG
25X16AVIG
16M-bit
W25X16AVDAIZ
25X16AVAIZ
(2)
SN
SOIC-8 150mil
SS
SOIC-8 208mil
SF
SOIC-16 300mil
ZP
WSON-8 6x5mm
DA
PDIP-8 300mil
Notes:
1.
For WSON packages, the package type ZP are not used in the top side marking.
2.
Package type SN (SOIC8 150mil) is a special order package, please contact Winbond for ordering
information.
- 47 -
Publication Release Date: August 7, 2009
Revision B
W25X16A
16 REVISION HISTORY
VERSION
A
B
DATE
07/09/08
08/07/09
PAGE
DESCRIPTION
New Create
Updated Max. Read Frequency to 100MHz
Updated Features section
Added SOIC-8 150mil package
Added G option for PDIP package
All
Updated Ordering Information
Removed G option for PDIP package
SOIC-8 150 Special Order
Update Package Diagrams
40~47
Trademarks
Winbond and SpiFlash are trademarks of Winbond Electronics Corporation.
All other marks are the property of their respective owner.
Important Notice
Winbond products are not designed, intended, authorized or warranted for use as components in
systems or equipment intended for surgical implantation, atomic energy control instruments, airplane
or spaceship instruments, transportation instruments, traffic signal instruments, combustion control
instruments, or for other applications intended to support or sustain life. Further more, Winbond
products are not intended for applications wherein failure of Winbond products could result or lead to a
situation wherein personal injury, death or severe property or environmental damage could occur.
Winbond customers using or selling these products for use in such applications do so at their own risk
and agree to fully indemnify Winbond for any damages resulting from such improper use or sales.
Information in this document is provided solely in connection with Winbond products. Winbond
reserves the right to make changes, corrections, modifications or improvements to this document and
the products and services described herein at any time, without notice.
- 48 -