Catalyst CAT24WC32GXATE13B 32k/64k-bit i2c serial cmos eeprom Datasheet

CAT24WC32/64
32K/64K-Bit I2C Serial CMOS EEPROM
FEATURES
■ 400 KHz I2C bus compatible*
■ Commercial, industrial, automotive and
extended automotive temperature ranges
■ 1.8 to 5.5 volt read and write operation
■ Write protection
■ Cascadable for up to eight devices
– Entire array protected when WP at VIH
■ 32/64-Byte page write buffer
■ 1,000,000 Program/erase cycles
■ Self-timed write cycle with auto-clear
■ 100 year data retention
■ 8-pin DIP or 8-pin SOIC
■ Schmitt trigger inputs for noise protection
DESCRIPTION
The CAT24WC32/64 is a 32K/64K-bit Serial CMOS
E2PROM internally organized as 4096/8192 words of 8
bits each. Catalyst’s advanced CMOS technology substantially reduces device power requirements. The
CAT24WC32/64 features a 32-byte page write buffer.
The device operates via the I2C bus serial interface and
is available in 8-pin DIP or 8-pin SOIC packages.
PIN CONFIGURATION
BLOCK DIAGRAM
DIP Package (P, L, GL)
A0
A1
1
2
8
7
VCC
WP
A2
VSS
3
4
6
5
SCL
SDA
EXTERNAL LOAD
SENSE AMPS
SHIFT REGISTERS
DOUT
ACK
VCC
WORD ADDRESS
BUFFERS
VSS
COLUMN
DECODERS
256
SOIC Package (J, W, K, X, GW, GX)
A0
A1
A2
1
2
3
8
7
6
VSS
4
5
VCC
WP
SCL
SDA
SDA
START/STOP
LOGIC
E2PROM
XDEC 128/256 128/256 X 256
CONTROL
LOGIC
WP
PIN FUNCTIONS
Pin Name
Function
A0, A1, A2
Device Address Inputs
SDA
Serial Data/Address
SCL
Serial Clock
WP
Write Protect
VCC
+1.8V to +5.5V Power Supply
VSS
Ground
DATA IN STORAGE
HIGH VOLTAGE/
TIMING CONTROL
SCL
A0
A1
A2
STATE COUNTERS
SLAVE
ADDRESS
COMPARATORS
* Catalyst Semiconductor is licensed by Philips Corporation to carry the I2C Bus Protocol.
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
24WC32/64 F02
Doc. No. 1039, Rev. G
CAT24WC32/64
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 Ground(1) ........... –2.0V to +VCC + 2.0V
VCC with Respect to Ground ............... –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) ........................ 100mA
RELIABILITY CHARACTERISTICS
Symbol
NEND
Parameter
(3)
Min.
Units
1,000,000
Cycles/Byte
Data Retention
100
Years
VZAP(3)
ESD Susceptibility
2000
Volts
ILTH(3)(4)
Latch-up
100
mA
TDR(3)
Endurance
Max.
D.C. OPERATING CHARACTERISTICS
VCC = +1.8V to +5.5V, unless otherwise specified.
Limits
Symbol
Parameter
Min.
Typ.
Max.
Units
Test Conditions
ICC
Power Supply Current
3
mA
fSCL = 100 KHz
ISB(5)
Standby Current (VCC = 5V)
1
µA
VIN = GND or VCC
ILI
Input Leakage Current
10
µA
VIN = GND to VCC
ILO
Output Leakage Current
10
µA
VOUT = GND to VCC
VIL
Input Low Voltage
–1
VCC x 0.3
V
VIH
Input High Voltage
VCC x 0.7
VCC + 0.5
V
VOL1
Output Low Voltage (VCC = +3.0V)
0.4
V
IOL = 3.0 mA
VOL2
Output Low Voltage (VCC = +1.8V)
0.5
V
IOL = 1.5 mA
CAPACITANCE TA = 25°C, f = 1.0 MHz, VCC = 5V
Symbol
Test
Max.
Units
Conditions
CI/O(3)
Input/Output Capacitance (SDA)
8
pF
VI/O = 0V
CIN(3)
Input Capacitance (A0, A1, A2, SCL, WP)
6
pF
VIN = 0V
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 20ns.
(2) Output shorted for no more than one second. No more than one output shorted at a time.
(3) These parameters are tested initially and after a design or process change that affects the parameter according to appropriate AEC-Q100
and JEDEC test methods.
(4) Latch-up protection is provided for stresses up to 100 mA on address and data pins from –1V to VCC +1V.
(5) Maximum standby current (ISB ) = 10µA for the Automotive and Extended Automotive temperature range.
Doc. No. 1039, Rev. G
2
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CAT24WC32/64
A.C. CHARACTERISTICS
VCC = +1.8V to +5.5V, unless otherwise specified
Output Load is 1 TTL Gate and 100pF
Read & Write Cycle Limits
CAT24WCXX-1.8
1.8V-5.5V
Min.
Symbol
Parameter
FSCL
Clock Frequency
tBUF(1)
Noise Suppression Time Constant at
SCL, SDA Inputs
SCL Low to SDA Data Out and ACK
Out
Time the Bus Must be Free Before
a New Transmission Can Start
tHD:STA
Start Condition Hold Time
tLOW
(1)
TI
tAA
CAT24WCXX
2.5V-5.5V
Max.
Min.
Max.
4.5V-5.5V
Min.
Max.
Units
100
100
400
kHz
200
200
200
ns
3.5
3.5
1
µs
4.7
4.7
1.2
µs
4
4
0.6
µs
Clock Low Period
4.7
4.7
1.2
µs
tHIGH
Clock High Period
4
4
0.6
µs
tSU:STA
Start Condition Setup Time
(for a Repeated Start Condition)
4.7
4.7
0.6
µs
tHD:DAT
Data In Hold Time
0
0
0
ns
tSU:DAT
Data In Setup Time
50
50
50
ns
(1)
SDA and SCL Rise Time
1
1
0.3
µs
tF
(1)
SDA and SCL Fall Time
300
300
300
ns
tSU:STO
Stop Condition Setup Time
tDH
Data Out Hold Time
tR
4
4
0.6
µs
100
100
100
ns
Power-Up Timing (1)(2)
Symbol
Parameter
Max.
Units
tPUR
Power-Up to Read Operation
1
ms
tPUW
Power-Up to Write Operation
1
ms
Note:
(1) This parameter is tested initially and after a design or process change that affects the parameter.
(2) tPUR and tPUW are the delays required from the time VCC is stable until the specified operation can be initiated.
Write Cycle Limits
Symbol
Parameter
tWR
Write Cycle Time
Min.
The write cycle time is the time from a valid stop
condition of a write sequence to the end of the internal
program/erase cycle. During the write cycle, the bus
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Typ.
Max
Units
10
ms
interface circuits are disabled, SDA is allowed to remain
high, and the device does not respond to its slave
address.
3
Doc. No. 1039, Rev. G
CAT24WC32/64
FUNCTIONAL DESCRIPTION
SDA: Serial Data/Address
The bidirectional serial data/address pin is used to
transfer all data into and out of the device. The SDA pin
is an open drain output and can be wire-ORed with other
open drain or open collector outputs.
The CAT24WC32/64 supports the I2C Bus data transmission protocol. This Inter-Integrated Circuit Bus protocol defines any device that sends data to the bus to be
a transmitter and any device receiving data to be a
receiver. The transfer is controlled by the Master device
which generates the serial clock and all START and
STOP conditions for bus access. The CAT24WC32/64
operates as a Slave device. Both the Master device and
Slave device can operate as either transmitter or receiver, but the Master device controls which mode is
activated.
A0, A1, A2: Device Address Inputs
These pins are hardwired or left unconnected (for hardware compatibility with CAT24WC16). When hardwired,
up to eight CAT24WC32/64s may be addressed on a
single bus system (refer to Device Addressing ). When
the pins are left unconnected, the default values are
zeros.
WP: Write Protect
This input, when tied to GND, allows write operations to
the entire memory. For CAT24WC32/64 when this pin
is tied to Vcc, the entire memory is write protected.
When left floating, memory is unprotected.
PIN DESCRIPTIONS
SCL: Serial Clock
The serial clock input clocks all data transferred into or
out of the device.
Figure 1. Bus Timing
tF
tHIGH
tR
tLOW
tLOW
SCL
tSU:STA
tHD:STA
tHD:DAT
tSU:DAT
tSU:STO
SDA IN
tAA
tBUF
tDH
SDA OUT
5020 FHD F03
Figure 2. Write Cycle Timing
SCL
SDA
8TH BIT
BYTE n
ACK
tWR
STOP
CONDITION
START
CONDITION
ADDRESS
5020 FHD F04
Figure 3. Start/Stop Timing
SDA
SCL
START BIT
Doc. No. 1039, Rev. G
STOP BIT
4
5020 FHD F05
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CAT24WC32/64
I2C BUS PROTOCOL
compare to the hardwired input pins, A2, A1 and A0. The
last bit of the slave address specifies whether a Read or
Write operation is to be performed. When this bit is set
to 1, a Read operation is selected, and when set to 0, a
Write operation is selected.
The features of the I2C bus protocol are defined as
follows:
(1) Data transfer may be initiated only when the bus is
not busy.
After the Master sends a START condition and the slave
address byte, the CAT24WC32/64 monitors the bus and
responds with an acknowledge (on the SDA line) when
its address matches the transmitted slave address. The
CAT24WC32/64 then performs a Read or Write operation depending on the state of the R/W bit.
(2) During a data transfer, the data line must remain
stable whenever the clock line is high. Any changes
in the data line while the clock line is high will be
interpreted as a START or STOP condition.
START Condition
Acknowledge
The START Condition precedes all commands to the
device, and is defined as a HIGH to LOW transition of
SDA when SCL is HIGH. The CAT24WC32/64 monitors
the SDA and SCL lines and will not respond until this
condition is met.
After a successful data transfer, each receiving device is
required to generate an acknowledge. The Acknowledging device pulls down the SDA line during the ninth clock
cycle, signaling that it received the 8 bits of data.
The CAT24WC32/64 responds with an acknowledge
after receiving a START condition and its slave address.
If the device has been selected along with a write
operation, it responds with an acknowledge after receiving each 8-bit byte.
STOP Condition
A LOW to HIGH transition of SDA when SCL is HIGH
determines the STOP condition. All operations must end
with a STOP condition.
When the CAT24WC32/64 begins a READ mode it
transmits 8 bits of data, releases the SDA line, and
monitors the line for an acknowledge. Once it receives
this acknowledge, the CAT24WC32/64 will continue to
transmit data. If no acknowledge is sent by the Master,
the device terminates data transmission and waits for a
STOP condition. The master must then issue a stop
condition to return the CAT24WC32/64 to the standby
power mode and place the device in a known state.
DEVICE ADDRESSING
The bus Master begins a transmission by sending a
START condition. The Master sends the address of the
particular slave device it is requesting. The four most
significant bits of the 8-bit slave address are fixed as
1010 (Fig. 5). The next three bits (A2, A1, A0) are the
device address bits; up to eight 32K/64K devices may
to be connected to the same bus. These bits must
Figure 4. Acknowledge Timing
SCL FROM
MASTER
1
8
9
DATA OUTPUT
FROM TRANSMITTER
DATA OUTPUT
FROM RECEIVER
ACKNOWLEDGE
START
5020 FHD F06
Figure 5. Slave Address Bits
1
0
1
0
A2
A1
A0
R/W
5027 FHD F07
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
5
Doc. No. 1039, Rev. G
CAT24WC32/64
If the Master transmits more than 32/64 bytes before
sending the STOP condition, the address counter ‘wraps
around’, and previously transmitted data will be
overwritten.
WRITE OPERATIONS
Byte Write
In the Byte Write mode, the Master device sends the
START condition and the slave address information
(with the R/W bit set to zero) to the Slave device. After
the Slave generates an acknowledge, the Master sends
two 8-bit address words that are to be written into the
address pointers of the CAT24WC32/64. After receiving
another acknowledge from the Slave, the Master device
transmits the data to be written into the addressed
memory location. The CAT24WC32/64 acknowledges
once more and the Master generates the STOP condition. At this time, the device begins an internal programming cycle to nonvolatile memory. While the cycle is in
progress, the device will not respond to any request from
the Master device.
When all 32/64 bytes are received, and the STOP
condition has been sent by the Master, the internal
programming cycle begins. At this point, all received
data is written to the CAT24WC32/64 in a single
write cycle.
Acknowledge Polling
Disabling of the inputs can be used to take advantage of
the typical write cycle time. Once the stop condition is
issued to indicate the end of the host's write operation,
CAT24WC32/64 initiates the internal write cycle. ACK
polling can be initiated immediately. This involves issuing the start condition followed by the slave address for
a write operation. If CAT24WC32/64 is still busy with the
write operation, no ACK will be returned. If
CAT24WC32/64 has completed the write operation, an
ACK will be returned and the host can then proceed with
the next read or write operation.
Page Write
The CAT24WC32/64 writes up to 32/64 bytes of data, in
a single write cycle, using the Page Write operation.
CAT24WC32/64, Die revision B = 32 byte page.
CAT24WC64, Die revision D = 64 byste page. The page
write operation is initiated in the same manner as the
byte write operation, however instead of terminating
after the initial byte is transmitted, the Master is allowed
to send up to 31/63 additional bytes. After each byte has
been transmitted, CAT24WC32/64 will respond with an
acknowledge, and internally increment the five low order
address bits by one. The high order bits remain unchanged.
WRITE PROTECTION
The Write Protection feature allows the user to protect
against inadvertent programming of the memory array.
If the WP pin is tied to VCC, the entire memory array is
protected and becomes read only. The CAT24WC32/64
Figure 6. Byte Write Timing
BUS ACTIVITY:
MASTER
SDA LINE
S
T
A
R
T
SLAVE
ADDRESS
BYTE ADDRESS
A15–A8
A7–A0
S
S
T
O
P
DATA
P
X XX *
A
C
K
A
C
K
A
C
K
A
C
K
24WC32/64 F08
Figure 7. Page Write Timing
BUS ACTIVITY:
MASTER
SDA LINE
S
T
A
R
T
SLAVE
ADDRESS
BYTE ADDRESS
A15–A8
A7–A0
S
DATA
DATA n+31/63
P
X XX *
A
C
K
A
C
K
A
C
K
* = Don't care bit for 24WC32
X= Don't care bit
Doc. No. 1039, Rev. G
DATA n
S
T
O
P
A
C
K
A
C
K
A
C
K
A
C
K
24WC32/64 F09
6
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CAT24WC32/64
READ operation. The Master device first performs a
‘dummy’ write operation by sending the START condition, slave address and byte addresses of the location it
wishes to read. After CAT24WC32/64 acknowledges,
the Master device sends the START condition and the
slave address again, this time with the R/W bit set to one.
The CAT24WC32/64 then responds with its acknowledge and sends the 8-bit byte requested. The master
device does not send an acknowledge but will generate
a STOP condition.
will accept both slave and byte addresses, but the
memory location accessed is protected from programming by the device’s failure to send an acknowledge
after the first byte of data is received.
READ OPERATIONS
The READ operation for the CAT24WC32/64 is initiated
in the same manner as the write operation with one
exception, that R/W bit is set to one. Three different
READ operations are possible: Immediate/Current Address READ, Selective/Random READ and Sequential
READ.
Sequential Read
The Sequential READ operation can be initiated by
either the Immediate Address READ or Selective READ
operations. After the CAT24WC32/64 sends the initial 8bit byte requested, the Master will respond with an
acknowledge which tells the device it requires more
data. The CAT24WC32/64 will continue to output an 8bit byte for each acknowledge sent by the Master. The
operation will terminate when the Master fails to respond
with an acknowledge, thus sending the STOP condition.
Immediate/Current Address Read
The CAT24WC32/64’s address counter contains the
address of the last byte accessed, incremented by one.
In other words, if the last READ or WRITE access was
to address N, the READ immediately following would
access data from address N+1. If N=E (where E=4095
for 24WC32 and E=8191 for 24WC64), then the counter
will ‘wrap around’ to address 0 and continue to clock out
data. After the CAT24WC32/64 receives its slave address information (with the R/W bit set to one), it issues
an acknowledge, then transmits the 8 bit byte requested.
The master device does not send an acknowledge, but
will generate a STOP condition.
The data being transmitted from CAT24WC32/64 is
outputted sequentially with data from address N followed by data from address N+1. The READ operation
address counter increments all of the CAT24WC32/64
address bits so that the entire memory array can be read
during one operation. If more than E (where E=4095 for
24WC32 and E=8191 for 24WC64) bytes are read out,
the counter will ‘wrap around’ and continue to clock out
data bytes.
Selective/Random Read
Selective/Random READ operations allow the Master
device to select at random any memory location for a
Figure 8. Immediate Address Read Timing
BUS ACTIVITY:
MASTER
SDA LINE
S
T
A
R
T
SLAVE
ADDRESS
DATA
S
P
A
C
K
SCL
SDA
S
T
O
P
8
N
O
A
C
K
9
8TH BIT
DATA OUT
NO ACK
STOP
24WC32/64 F10
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
7
Doc. No. 1039, Rev. G
CAT24WC32/64
Figure 9. Selective Read Timing
BUS ACTIVITY:
MASTER
SDA LINE
S
T
A
R
T
SLAVE
ADDRESS
S
T
A
R
T
BYTE ADDRESS
A15–A8
A7–A0
S
SLAVE
ADDRESS
S
T
O
P
DATA
P
S
XXX *
A
C
K
A
C
K
A
C
K
A
C
K
N
O
A
C
K
* = Don't care bit for 24WC32
24WC32/64 F11
X= Don't care bit
Figure 10. Sequential Read Timing
BUS ACTIVITY:
MASTER
SLAVE
ADDRESS
DATA n
DATA n+1
DATA n+2
S
T
O
P
DATA n+x
SDA LINE
P
A
C
K
A
C
K
A
C
K
A
C
K
N
O
A
C
K
5020 FHD F12
Doc. No. 1039, Rev. G
8
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CAT24WC32/64
8-LEAD 300 MIL WIDE PLASTIC DIP (P, L, GL)
0.245 (6.17)
0.295 (7.49)
0.300 (7.62)
0.325 (8.26)
0.355 (9.02)
0.400 (10.16)
0.120 (3.05)
0.150 (3.81) 0.180 (4.57) MAX
0.015 (0.38)
0.110 (2.79)
0.150 (3.81)
0.100 (2.54)
BSC
0.310 (7.87)
0.380 (9.65)
0.045 (1.14)
0.060 (1.52)
0.014 (0.36)
0.022 (0.56)
Notes:
1. Complies with JEDEC Publication 95 MS001 dimensions; however, some of the dimensions may be more stringent.
2. All linear dimensions are in inches and parenthetically in millimeters.
8-LEAD 150 MIL WIDE SOIC (J, W, GW)
0.1497 (3.80)
0.1574 (4.00)
0.1890 (4.80)
0.1968 (5.00)
0.2284 (5.80)
0.2440 (6.20)
0.0099 (0.25)
X 45
0.0196 (0.50)
0.0075 (0.19)
0.0098 (0.25)
0.0532 (1.35)
0.0688 (1.75)
0 —8
0.050 (1.27) BSC
0.013 (0.33)
0.020 (0.51)
0.0040 (0.10)
0.0098 (0.25)
0.016 (0.40)
0.050 (1.27)
Notes:
1. Complies with JEDEC publication 95 MS-012 dimensions; however, some dimensions may be more stringent.
2. All linear dimensions are in inches and parenthetically in millimeters.
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
9
Doc. No. 1039, Rev. G
CAT24WC32/64
8-LEAD 210 MIL WIDE SOIC (K, X, GX)
0.205 (5.20)
0.213 (5.40)
0.303 (7.70)
0.318 (8.10)
0.0267 (0.68)
0.0303 (0.77)
0.205 (5.15)
0.210 (5.35)
0.008 (0.20)
0.080 (2.03)
MAX
4 REF
0.046 (1.17)
0.054 (1.37)
0.025 (0.65)
0.0137 (0.35)
0.0177 (0.45)
Note:
1. All linear dimensions are in inches and parenthetically in millimeters.
Doc. No. 1039, Rev. G
10
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CAT24WC32/64
ORDERING INFORMATION
Prefix
Device #
CAT
Optional
Company ID
24WC32
Product
Number
24WC32: 32K
24WC64: 64K
Suffix
J
-1.8
I
Temperature Range
Blank = Commercial (0˚C to +70˚C)
I = Industrial (-40˚C to +85˚C)
A = Automotive (-40˚ to +105˚C)
E = Extended (-40˚C to +125˚C)
Package
P: PDIP
J: SOIC, JEDEC
K: SOIC, EIAJ
L: PDIP (Lead-free, Halogen-free)
W: SOIC, JEDEC (Lead-free, Halogen-free)
X: SOIC, EIAJ (Lead-free, Halogen-free)
GL: PDIP (Lead-free, Halogen-free, NiPdAu lead plating)
GW: SOIC, JEDEC (Lead-free, Halogen-free, NiPdAu lead plating)
GX: SOIC, EIAJ (Lead-free, Halogen-free, NiPdAu lead plating)
TE13
Rev D(2)
Tape & Reel
Operating Voltage
Blank = 2.5 to 5.5V
1.8 = 1.8 to 5.5V
Die Revision
24WC32: B, D
24WC64: B, D
Notes:
(1) The device used in the above example is a CAT24WC32JI-1.8TE13 (SOIC, Industrial Temperature, 1.8 Volt to 5.5 Volt Operating
Voltage, Tape & Reel)
(2) Product die revision letter is marked on top of the package as a suffix to the production date code (e.g., AYWWB). For additional
information, please contact your Catalyst sales office.
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
11
Doc. No. 1039, Rev. G
REVISION HISTORY
Date
Rev.
Reason
7/7/2004
E
Added die revision to Ordering Information
7/28/2004
F
Updated Features
Updated DC operating characteristics and notes
08/17/2005
G
Edit Features
Edit Pin Functions
Edit Reliability Characteristics
Edit D.C. Operating Characteristics
Edit A.C. Characteristics
Add Package Dimensions
Edit Ordering Information
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Publication #:
Revison:
Issue date:
1039
G
08/17/05