Catalyst CAT25C08SI-1.8TE13 1k/2k/4k/8k/16k spi serial cmos e2prom Datasheet

Advanced Information
CAT25C01/02/04/08/16
1K/2K/4K/8K/16K SPI Serial CMOS E2PROM
FEATURES
■ 1,000,000 Program/Erase Cycles
■ 10 MHz SPI Compatible
■ 100 Year Data Retention
■ 1.8 to 6.0 Volt Operation
■ Self-Timed Write Cycle
■ Hardware and Software Protection
■ 8-Pin DIP/SOIC, 8/14-Pin TSSOP and 8-Pin MSOP
■ Zero Standby Current
■ 16/32-Byte Page Write Buffer
■ Low Power CMOS Technology
■ Block Write Protection
■ SPI Modes (0,0 & 1,1)
– Protect 1/4, 1/2 or all of E2PROM Array
■ Commercial, Industrial and Automotive
Temperature Ranges
DESCRIPTION
input (SCK), data in (SI) and data out (SO) are required
to access the device. The HOLD pin may be used to
suspend any serial communication without resetting the
serial sequence. The CAT25C01/02/04/08/16 is designed with software and hardware write protection
features including Block Write protection. The device is
available in 8-pin DIP, 8-pin SOIC, 8-pin MSOP and 8/
14-pin TSSOP packages.
The CAT25C01/02/04/08/16 is a 1K/2K/4K/8K/16K Bit
SPI Serial CMOS E2PROM internally organized as
128x8/256x8/512x8/1024x8/2048x8 bits. Catalyst’s advanced CMOS Technology substantially reduces device power requirements. The CAT25C01/02/04 features a 16-byte page write buffer. The 25C08/16 features a 32-byte page write buffer.The device operates
via the SPI bus serial interface and is enabled though a
Chip Select (CS). In addition to the Chip Select, the clock
PIN CONFIGURATION
SOIC Package (S)
TSSOP Package (U14)
CS
SO
NC
NC
NC
WP
VSS
1
2
3
4
5
6
7
14
13
12
11
10
9
8
VCC
HOLD
NC
NC
NC
SCK
SI
CS
SO
WP
VSS
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
DIP Package (P)
CS
SO
WP
VSS
CS
SO
WP
VSS
8
7
6
5
8
7
6
4
5
VCC
HOLD
CS
SO
WP
VSS
SCK
SI
1
2
3
4
8
7
6
5
VCC
HOLD
SCL
SI
BLOCK DIAGRAM
MSOP Package (R)*
1
2
3
4
1
2
3
TSSOP Package (U)
SENSE AMPS
SHIFT REGISTERS
VCC
HOLD
SCK
SI
WORD ADDRESS
BUFFERS
*CAT 25C01/02 only
COLUMN
DECODERS
PIN FUNCTIONS
Function
SO
Serial Data Output
SCK
Serial Clock
WP
Write Protect
VCC
+1.8V to +6.0V Power Supply
VSS
Ground
CS
Chip Select
SI
Serial Data Input
HOLD
Suspends Serial Input
NC
No Connect
© 1999 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
SO
SI
CS
WP
HOLD
SCK
I/O
CONTROL
SPI
CONTROL
LOGIC
BLOCK
PROTECT
LOGIC
CONTROL LOGIC
Pin Name
XDEC
E2PROM
ARRAY
DATA IN
STORAGE
HIGH VOLTAGE/
TIMING CONTROL
STATUS
REGISTER
1
25C128 F02
Doc. No. 25067-00 5/00
Advanced Information
CAT25C01/02/04/08/16
ABSOLUTE MAXIMUM RATINGS*
*COMMENT
Temperature Under Bias ................. –55°C to +125°C
Stresses above those listed under “Absolute Maximum
Ratings” may cause permanent damage to the device.
These are stress ratings only, and functional operation
of the device at these or any other conditions outside of
those listed in the operational sections of this specification is not implied. Exposure to any absolute maximum
rating for extended periods may affect device performance and reliability.
Storage Temperature ....................... –65°C to +150°C
Voltage on any Pin with
Respect to VSS(1) .................. –2.0V to +VCC +2.0V
VCC with Respect to VSS ................................ –2.0V to +7.0V
Package Power Dissipation
Capability (Ta = 25°C) ................................... 1.0W
Lead Soldering Temperature (10 secs) ............ 300°C
Output Short Circuit Current(2) ........................ 100 mA
RELIABILITY CHARACTERISTICS
Symbol
NEND
(3)
Parameter
Endurance
Min.
Max.
Units
Reference Test Method
1,000,000
Cycles/Byte
MIL-STD-883, Test Method 1033
TDR(3)
Data Retention
100
Years
MIL-STD-883, Test Method 1008
VZAP(3)
ESD Susceptibility
2000
Volts
MIL-STD-883, Test Method 3015
ILTH(3)(4)
Latch-Up
100
mA
JEDEC Standard 17
D.C. OPERATING CHARACTERISTICS
VCC = +1.8V to +6.0V, unless otherwise specified.
Limits
Symbol
Parameter
Min.
Typ.
Max.
Units
Test Conditions
ICC1
Power Supply Current
(Operating Write)
5
mA
VCC = 5V @ 5MHz
SO=open; CS=Vss
ICC2
Power Supply Current
(Operating Read)
3
mA
VCC = 5.5V
FCLK = 5MHz
ISB
Power Supply Current
(Standby)
0
µA
CS = VCC
VIN = VSS or VCC
ILI
Input Leakage Current
2
µA
ILO
Output Leakage Current
3
µA
VIL(3)
Input Low Voltage
-1
VCC x 0.3
V
VIH(3)
Input High Voltage
VCC x 0.7
VCC + 0.5
V
VOL1
Output Low Voltage
0.4
V
VOH1
Output High Voltage
VOL2
Output Low Voltage
VOH2
Output High Voltage
VCC - 0.8
V
0.2
VCC-0.2
VOUT = 0V to VCC,
CS = 0V
4.5V≤VCC<5.5V
IOL = 3.0mA
IOH = -1.6mA
V
1.8V≤VCC<2.7V
V
IOL = 150µA
IOH = -100µA
Note:
(1) The minimum DC input voltage is –0.5V. During transitions, inputs may undershoot to –2.0V for periods of less than 20 ns. Maximum DC
voltage on output pins is VCC +0.5V, which may overshoot to VCC +2.0V for periods of less than 20 ns.
(2) Output shorted for no more than one second. No more than one output shorted at a time.
(3) This parameter is tested initially and after a design or process change that affects the parameter.
(4) Latch-up protection is provided for stresses up to 100 mA on address and data pins from –1V to VCC +1V.
Doc. No. 25067-00 5/00
2
Advanced Information
CAT25C01/02/04/08/16
Figure 1. Sychronous Data Timing
tCS
VIH
CS
VIL
tCSH
tCSS
VIH
tWL
tWH
SCK
VIL
tH
tSU
VIH
VALID IN
SI
VIL
tRI
tFI
tV
VOH
SO
tHO
tDIS
HI-Z
HI-Z
VOL
Note: Dashed Line= mode (1, 1) – – – – –
A.C. CHARACTERISTICS
Limits
1.8V-6.0V
SYMBOL PARAMETER
Min.
2.5V-6.0V
Max. Min.
Max.
4.5V-5.5V
Min.
Max.
Test
UNITS Conditions
tSU
Data Setup Time
50
20
20
ns
VIH = 2.4V
tH
Data Hold Time
50
20
20
ns
CL = 100pF
tWH
SCK High Time
250
75
40
ns
VOL = 0.8V
tWL
SCK Low Time
250
75
40
ns
VOH = 2.0v
fSCK
Clock Frequency
DC
tLZ
HOLD to Output Low Z
50
Input Rise Time
tFI(1)
Input Fall Time
tHD
HOLD Setup Time
100
40
40
ns
tCD
HOLD Hold Time
100
40
40
ns
tWC
Write Cycle Time
10
5
5
ms
tV
Output Valid from Clock Low
250
80
80
ns
tHO
Output Hold Time
tDIS
Output Disable Time
250
75
75
ns
tHZ
HOLD to Output High Z
150
50
50
ns
tCS
CS High Time
500
100
100
ns
tCSS
CS Setup Time
500
100
100
ns
tCSH
CS Hold Time
500
100
100
ns
tWPS
WP Setup Time
150
50
50
ns
tWPH
WP Hold Time
150
50
50
ns
tRI
(1)
1
DC
10
MHz
50
50
ns
2
2
2
µs
2
2
2
µs
0
5
0
DC
0
CL = 100pF
CL = 50pF
ns
NOTE:
(1) This parameter is tested initially and after a design or process change that affects the parameter.
3
Doc. No. 25067-00 5/00
Advanced Information
CAT25C01/02/04/08/16
or data present on the SI pin are latched on the rising
edge of the SCK. Data on the SO pin is updated on the
falling edge of the SCK for SPI modes (0,0 & 1,1) .
FUNCTIONAL DESCRIPTION
The CAT25C01/02/04/08/16 supports the SPI bus data
transmission protocol. The synchronous Serial Peripheral Interface (SPI) helps the CAT25C01/02/04/08/16 to
interface directly with many of today’s popular
microcontrollers. The CAT25C01/02/04/08/16 contains
an 8-bit instruction register. (The instruction set and the
operation codes are detailed in the instruction set table)
CS
CS: Chip Select
CS is the Chip select pin. CS low enables the CAT25C01/
02/04/08/16 and CS high disables the CAT25C01/02/
04/08/16. CS high takes the SO output pin to high
impedance and forces the devices into a Standby Mode
(unless an internal write operation is underway) The
CAT25C01/02/04/08/16 draws ZERO current in the
Standby mode. A high to low transition on CS is required
prior to any sequence being initiated. A low to high
transition on CS after a valid write sequence is what
initiates an internal write cycle.
After the device is selected with CS going low, the first
byte will be received. The part is accessed via the SI pin,
with data being clocked in on the rising edge of SCK.
The first byte contains one of the six op-codes that define
the operation to be performed.
WP
WP: Write Protect
WP is the Write Protect pin. The Write Protect pin will
allow normal read/write operations when held high.
When WP is tied low and the WPEN bit in the status
register is set to “1”, all write operations to the status
register are inhibited. WP going low while CS is still low
will interrupt a write to the status register. If the internal
write cycle has already been initiated, WP going low will
have no effect on any write operation to the status
register. The WP pin function is blocked when the WPEN
bit is set to 0. Figure 10 illustrates the WP timing
sequence during a write operation.
PIN DESCRIPTION
SI: Serial Input
SI is the serial data input pin. This pin is used to input all
opcodes, byte addresses, and data to be written to the
25C01/02/04/08/16. Input data is latched on the rising
edge of the serial clock for SPI modes (0, 0 & 1, 1).
SO: Serial Output
SO is the serial data output pin. This pin is used to
transfer data out of the 25C01/02/04/08/16. During a
read cycle, data is shifted out on the falling edge of the
serial clock for SPI modes (0,0 & 1,1).
SCK: Serial Clock
SCK is the serial clock pin. This pin is used to synchronize the communication between the microcontroller
and the 25C01/02/04/08/16. Opcodes, byte addresses,
INSTRUCTION SET
Instruction
Opcode
Operation
WREN
0000 0110
Enable Write Operations
WRDI
0000 0100
Disable Write Operations
RDSR
0000 0101
Read Status Register
WRSR
0000 0001
Write Status Register
READ
0000 X011(1)
Read Data from Memory
WRITE
0000 X010(1)
Write Data to Memory
Power-Up Timing(2)(3)
Symbol
Parameter
Max.
Units
tPUR
Power-up to Read Operation
1
ms
tPUW
Power-up to Write Operation
1
ms
Note:
(1) X=0 for 25C01, 25C02, 25C08, 25C16. X=A8 for 25C04
(2) This parameter is tested initially and after a design or process change that affects the parameter.
(3) tPUR and tPUW are the delays required from the time VCC is stable until the specified operation can be initiated.
Doc. No. 25067-00 5/00
4
Advanced Information
CAT25C01/02/04/08/16
HOLD
HOLD: Hold
STATUS REGISTER
HOLD is the HOLD pin. The HOLD pin is used to pause
transmission to the CAT25C01/02/04/08/16 while in the
middle of a serial sequence without having to re-transmit
entire sequence at a later time. To pause, HOLD must be
brought low while SCK is low. The SO pin is in a high
impedance state during the time the part is paused, and
transitions on the SI pins will be ignored. To resume
communication, HOLD is brought high, while SCK is low.
(HOLD should be held high any time this function is not
being used.) HOLD may be tied high directly to VCC or
tied to VCC through a resistor. Figure 9 illustrates hold
timing sequence.
The Status Register indicates the status of the device.
The RDY (Ready) bit indicates whether the CAT25C01/
02/04/08/16 is busy with a write operation. When set to
1 a write cycle is in progress and when set to 0 the device
indicates it is ready. This bit is read onlyThe WEL (Write
Enable) bit indicates the status of the write enable latch.
When set to 1, the device is in a Write Enable state and
when set to 0 the device is in a Write Disable state. The
WEL bit can only be set by the WREN instruction and can
be reset by the WRDI instruction.
STATUS REGISTER
7
WPEN
6
5
PR_MODE SPI_MODE
4
3
2
1
0
X
BP1
BP0
WEL
RDY
BLOCK PROTECTION BITS
Status Register Bits
BP1
BP0
Array Address
Protected
Protection
0
0
None
No Protection
0
1
25C01: 60-7F
25C02: C0-FF
25C04: 180-1FF
25C08: 0300-03FF
25C16: 0600-07FF
Quarter Array Protection
1
0
25C01: 40-7F
25C02: 80-FF
25C04: 100-1FF
25C08: 0200-03FF
25C16: 0400-07FF
Half Array Protection
1
1
25C01: 00-7F
25C02: 00-FF
25C04: 000-1FF
25C08: 0000-03FF
25C16: 0000-07FF
Full Array Protection
WRITE PROTECT ENABLE OPERATION
WPEN
0
WP
X
WEL
0
Protected
Blocks
Protected
Unprotected
Blocks
Protected
Status
Register
Protected
0
X
1
Protected
Writable
Writable
1
Low
0
Protected
Protected
Protected
1
Low
1
Protected
Writable
Protected
X
High
0
Protected
Protected
Protected
X
High
1
Protected
Writable
Writable
5
Doc. No. 25067-00 5/00
Advanced Information
CAT25C01/02/04/08/16
writes(reset the latch) to the device. Disabling writes
will protect the device against inadvertent writes.
The BP0 and BP1 (Block Protect) bits indicate which
blocks are currently protected. These bits are set by the
user issuing the WRSR instruction. The user is allowed
to protect quarter of the memory, half of the memory or
the entire memory by setting these bits. Once protected
the user may only read from the protected portion of the
array. These bits are non-volatile.
READ Sequence
The part is selected by pulling CS low. The 8-bit read
instruction is transmitted to the CAT25C01/02/04/08/
16, followed by the 16-bit address for 25C08/16. (only
10-bit addresses are used for 25C08, 11-bit addresses
are used for 25C16. The rest of the bits are don't care
bits) and 8-bit address for 25C01/02/04 (for the 25C04,
bit 3 of the read data instruction contains address A8).
The WPEN (Write Protect Enable) is an enable bit for the
WP pin. The WP pin and WPEN bit in the status register
control the programmable hardware write protect feature. Hardware write protection is enabled when WP is
low and WPEN bit is set to high. The user cannot write
to the status register, (including the block protect bits
and the WPEN bit) and the block protected sections in
the memory array when the chip is hardware write
protected. Only the sections of the memory array that
are not block protected can be written. Hardware write
protection is disabled when either WP pin is high or the
WPEN bit is zero.
After the correct read instruction and address are sent,
the data stored in the memory at the selected address
is shifted out on the SO pin. The data stored in the
memory at the next address can be read sequentially by
continuing to provide clock pulses. The internal address pointer is automatically incremented to the next
higher address after each byte of data is shifted out.
When the highest address is reached, the address
counter rolls over to 0000h allowing the read cycle to be
continued indefinitely. The read operation is terminated
by pulling the CS high. To read the status register,
RDSR instruction should be sent. The contents of the
status register are shifted out on the SO line. The status
register may be read at any time even during a write
cycle. Read sequece is illustrated in Figure 4. Reading
status register is illustrated in Figure 5.
DEVICE OPERATION
Write Enable and Disable
The CAT25C01/02/04/08/16 contains a write enable
latch. This latch must be set before any write operation.
The device powers up in a write disable state when Vcc
is applied. WREN instruction will enable writes (set the
latch) to the device. WRDI instruction will disable
Figure 2. WREN Instruction Timing
CS
SK
0
SI
0
0
0
1
0
1
0
HIGH IMPEDANCE
SO
Note: Dashed Line= mode (1, 1) – – – – –
Figure 3. WRDI Instruction Timing
CS
SK
SI
SO
0
0
0
0
0
0
HIGH IMPEDANCE
Note: Dashed Line= mode (1, 1) – – – – –
Doc. No. 25067-00 5/00
1
6
0
Advanced Information
CAT25C01/02/04/08/16
Byte Write
Once the device is in a Write Enable state, the user may
proceed with a write sequence by setting the CS low,
issuing a write instruction via the SI line, followed by the
16-bit address for 25C08/16. (only 10-bit addresses are
used for 25C08, 11-bit addresses are used for 25C16.
The rest of the bits are don't care bits) and 8-bit address
for 25C01/02/04 (for the 25C04, bit 3 of the read data
instruction contains address A8). Programming will start
after the CS is brought high. Figure 6 illustrates byte
write sequence.
WRITE Sequence
The CAT25C01/02/04/08/16 powers up in a Write Disable state. Prior to any write instructions, the WREN
instruction must be sent to CAT25C01/02/04/08/16.
The device goes into Write enable state by pulling the
CS low and then clocking the WREN instruction into
CAT25C01/02/04/08/16. The CS must be brought high
after the WREN instruction to enable writes to the
device. If the write operation is initiated immediately
after the WREN instruction without CS being brought
high, the data will not be written to the array because the
write enable latch will not have been properly set. Also,
for a successful write operation the address of the
memory location(s) to be programmed must be outside
the protected address field location selected by the
block protection level.
Figure 4. Read Instruction Timing
CS
0
1
2
3
4
5
6
7
8
9
10
20
21
22
23
24
25
26
27
28
29
30
2
1
SK
OPCODE
SI
0
0
0
0
0
0
1
BYTE ADDRESS*
1
DATA OUT
HIGH IMPEDANCE
SO
7
6
5
4
3
0
MSB
*Please check the instruction set table for address
Note: Dashed Line= mode (1, 1) – – – –
Figure 5. RDSR Instruction Timing
CS
0
1
2
3
4
5
6
7
1
0
1
8
9
10
11
12
13
14
2
1
SCK
OPCODE
SI
0
0
0
0
0
DATA OUT
SO
HIGH IMPEDANCE
7
6
5
4
3
0
MSB
Note: Dashed Line= mode (1, 1) – – – – –
7
Doc. No. 25067-00 5/00
Advanced Information
CAT25C01/02/04/08/16
During an internal write cycle, all commands will be
ignored except the RDSR (Read Status Register) instruction.
remain constant.The only restriction is that the X (X=16
for 25C01/02/04 and X=32 for 25C08/16) bytes must
reside on the same page. If the address counter
reaches the end of the page and clock continues, the
counter will “roll over” to the first address of the page and
overwrite any data that may have been written. The
CAT25C01/02/04/08/16 is automatically returned to the
write disable state at the completion of the write cycle.
Figure 8 illustrates the page write sequence.
The Status Register can be read to determine if the write
cycle is still in progress. If Bit 0 of the Status Register is
set at 1, write cycle is in progress. If Bit 0 is set at 0, the
device is ready for the next instruction
Page Write
The CAT25C01/02/04/08/16 features page write capability. After the initial byte, the host may continue to write
up to 16 bytes of data to the CAT25C01/02/04 and 32
bytes of data for 25C08/16. After each byte of data
received, lower order address bits are internally
incremented by one; the high order bits of address will
To write to the status register, the WRSR instruction
should be sent. Only Bit 2, Bit 3 and Bit 7 of the status
register can be written using the WRSR instruction.
Figure 7 illustrates the sequence of writing to status
register.
Figure 6. Write Instruction Timing
CS
0
1
2
3
4
5
6
7
8
21
22
23
24
25
26
27
28
29
30
31
SK
OPCODE
SI
0
0
0
0
0
DATA IN
0
1
0
ADDRESS
D7 D6 D5 D4 D3 D2 D1 D0
HIGH IMPEDANCE
SO
Note: Dashed Line= mode (1, 1) – – – – –
Figure 7. WRSR Timing
CS
0
1
2
3
4
5
6
7
8
9
10
11
1
7
6
5
4
12
13
14
15
2
1
0
SCK
OPCODE
SI
0
0
0
0
0
DATA IN
0
0
MSB
SO
HIGH IMPEDANCE
Note: Dashed Line= mode (1, 1) – – – – –
Doc. No. 25067-00 5/00
8
3
Advanced Information
CAT25C01/02/04/08/16
DESIGN CONSIDERATIONS
after the proper number of clock cycles to start an
internal write cycle. Access to the array during an
internal write cycle is ignored and programming is
continued. On power up, SO is in a high impedance. If
an invalid op code is received, no data will be shifted
into the CAT25C01/02/04/08/16, and the serial output
pin (SO) will remain in a high impedance state until the
falling edge of CS is detected again.
The CAT25C01/02/04/08/16 powers up in a write
disable state and in a low power standby mode. A
WREN instruction must be issued to perform any writes
to the device after power up. Also,on power up CS
should be brought low to enter a ready state and
receive an instruction. After a successful byte/page
write or status register write, the CAT25C01/02/04/08/
16 goes into a write disable mode. CS must be set high
Figure 8. Page Write Instruction Timing
CS
0
1
2
3
4
5
6
7
8
21
22
23 24-31
32-39
24+(N-1)x8-1..24+(N-1)x8 24+Nx8-1
SK
DATA IN
OPCODE
SI
0
0
0
0
0
0
1
0
Data
Byte 1
ADDRESS
Data
Byte 2
Data
Byte 3
Data Byte N
0
7..1
HIGH IMPEDANCE
SO
Note: Dashed Line= mode (1, 1) – – – – –
Figure 9. HOLD Timing
CS
tCD
tCD
SCK
tHD
tHD
HOLD
tHZ
HIGH IMPEDANCE
SO
tLZ
Note: Dashed Line= mode (1, 1) – – – – –
Figure 10. WP Timing
tWPS
tWPH
CS
tCSH
SCK
WP
WP
Note: Dashed Line= mode (1, 1) – – – – –
9
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Advanced Information
CAT25C01/02/04/08/16
ORDERING INFORMATION
Prefix
CAT
Optional
Company ID
Device #
25C16
Product
Number
25C16: 16K
25C08: 8K
25C04: 4K
25C02: 2K
25C01: 1K
Suffix
-1.8
I
S
Temperature Range
Blank = Commercial (0°C to +70°C)
I = Industrial (-40°C to +85°C)
A = Automotive (-40°C to +105°C)2
Package
P = 8-pin PDIP
R = 8-pin MSOP3
S = 8-pin SOIC
U = 8-pin TSSOP
U14 = 14-pin TSSOP
TE13
Tape & Reel
TE13: 2000/Reel
Operating Voltage
Blank (Vcc=2.5 to 6.0V)
1.8 (Vcc=1.8 to 6.0V)
Notes:
(1) The device used in the above example is a 25C16SI-1.8TE13 (SOIC, Industrial Temperature, 1.8 Volt to 6 Volt Operating Voltage,
Tape & Reel)
(2) -40°C to 125°C is available upon request
(3) CAT25C01, CAT25C02 only
Doc. No. 25067-00 5/00
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