Catalyst CA24WC128K-1.8TE13 128k-bit i2c serial cmos e2prom Datasheet

Preliminary
CAT24WC128
128K-Bit I2C Serial CMOS E2PROM
FEATURES
■ 1MHz I2C Bus Compatible*
■ Write Protect Feature
– Entire Array Protected When WP at VIH
■ 1.8 to 6 Volt Operation
■ Low Power CMOS Technology
■ 100,000 Program/Erase Cycles
■ 64-Byte Page Write Buffer
■ 100 Year Data Retention
■ Self-Timed Write Cycle with Auto-Clear
■ 8-Pin DIP, 8-Pin SOIC or 14-pin TSSOP
■ Commercial, Industrial and Automotive
Temperature Ranges
DESCRIPTION
The CAT24WC128 is a 128K-bit Serial CMOS E2PROM
internally organized as 16384 words of 8 bits each.
Catalyst’s advanced CMOS technology substantially
reduces device power requirements. The
CAT24WC128 features a 64-byte page write buffer. The
device operates via the I2C bus serial interface and is
available in 8-pin DIP, 8-pin SOIC or 14-pin TSSOP
packages.
BLOCK DIAGRAM
PIN CONFIGURATION
DIP Package (P)
NC
NC
NC
VSS
1
2
3
4
8
7
6
5
EXTERNAL LOAD
VCC
WP
SCL
SDA
TSSOP Package (U14)
NC
NC
VSS
1
2
3
4
8
7
6
5
1
14
2
13
VCC
WP
NC
3
12
NC
NC
4
5
6
11
10
9
NC
NC
SCL
8
SDA
NC
NC
SOIC Package (J,K)
NC
NC
NC
VCC
WP
SCL
SDA
VSS
7
SENSE AMPS
SHIFT REGISTERS
DOUT
ACK
VCC
VSS
WORD ADDRESS
BUFFERS
COLUMN
DECODERS
512
SDA
START/STOP
LOGIC
XDEC
24WC128 F01
256
E2PROM
256X512
CONTROL
LOGIC
WP
PIN FUNCTIONS
Pin Name
Function
SDA
Serial Data/Address
SCL
Serial Clock
WP
Write Protect
VCC
+1.8V to +6V Power Supply
VSS
Ground
DATA IN STORAGE
HIGH VOLTAGE/
TIMING CONTROL
SCL
STATE COUNTERS
* Catalyst Semiconductor is licensed by Philips Corporation to carry the I2C Bus Protocol.
© 1999 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
24WC128 F02
Doc. No. 25060-00 6/99
S-1
CAT24WC128
Preliminary
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
TDR
(3)
(3)
VZAP
(3)
ILTH(3)(4)
Parameter
Min.
Units
Reference Test Method
100,000
Cycles/Byte
MIL-STD-883, Test Method 1033
Data Retention
100
Years
MIL-STD-883, Test Method 1008
ESD Susceptibility
2000
Volts
MIL-STD-883, Test Method 3015
Latch-up
100
mA
Endurance
Max.
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 - Read
1
mA
fSCL = 100 KHz
VCC=5V
ICC2
Power Supply Current - Write
3
mA
fSCL = 100 KHz
VCC=5V
ISB(5)
Standby Current
0
µA
VIN = GND or VCC
VCC=5V
ILI
Input Leakage Current
3
µA
VIN = GND to VCC
ILO
Output Leakage Current
3
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 (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) 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.
(5) Standby current (ISB ) = 0 µA (<900 nA).
Doc. No. 25060-00 6/99 S-1
2
Preliminary
CAT24WC128
A.C. CHARACTERISTICS
VCC = +1.8V to +6V, unless otherwise specified
Output Load is 1 TTL Gate and 100pF
Read & Write Cycle Limits
Symbol
Parameter
VCC=1.8V - 6.0V VCC=2.5V - 6.0V VCC=3.0V - 5.5V
Min.
Max.
Min.
100
Max.
Min.
Units
1000
kHz
0.55
µs
FSCL
Clock Frequency
tAA
SCL Low to SDA Data Out
and ACK Out
0.1
tBUF(1)
Time the Bus Must be Free Before
a New Transmission Can Start
4.7
1.2
0.5
µs
tHD:STA
Start Condition Hold Time
4.0
0.6
0.25
µs
tLOW
Clock Low Period
4.7
1.2
0.6
µs
tHIGH
Clock High Period
4.0
0.6
0.4
µs
tSU:STA
Start Condition Setup Time
(for a Repeated Start Condition)
4.0
0.6
0.25
µs
tHD:DAT
Data In Hold Time
0
0
0
ns
tSU:DAT
Data In Setup Time
100
100
100
ns
tR(1)
SDA and SCL Rise Time
1.0
0.3
0.3
µs
tF(1)
SDA and SCL Fall Time
300
300
100
ns
tSU:STO
Stop Condition Setup Time
4.7
0.6
0.25
µs
tDH
Data Out Hold Time
100
50
50
ns
tWR
Write Cycle Time
3.5
10
400
Max.
0.05
0.9
0.05
10
10
ms
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.
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 interface circuits are disabled, SDA is allowed to remain high, and the device does not respond to its slave
address.
FUNCTIONAL DESCRIPTION
The CAT24WC128 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 CAT24WC128
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.
3
Doc. No. 25060-00 6/99 S-1
CAT24WC128
Preliminary
PIN DESCRIPTIONS
I2C BUS PROTOCOL
SCL: Serial Clock
The serial clock input clocks all data transferred into or
out of the device.
The features of the I2C bus protocol are defined as
follows:
(1) Data transfer may be initiated only when the bus
is not busy.
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.
(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.
WP: Write Protect
This input, when tied to GND, allows write operations to
the entire memory. When this pin is tied to Vcc, the
entire memory is write protected. When left floating,
memory is unprotected.
START Condition
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 CAT24WC128 monitors
the SDA and SCL lines and will not respond until this
condition is met.
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.
Figure 1. Bus Timing
tHIGH
tF
tLOW
tR
tLOW
SCL
tSU:STA
tHD:DAT
tHD:STA
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. 25060-00 6/99 S-1
STOP BIT
4
5020 FHD F05
Preliminary
CAT24WC128
DEVICE ADDRESSING
knowledge, the CAT24WC128 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 bus Master begins a transmission by sending a
START condition. The Master sends the address of the
particular slave device it is requesting. The seven most
significant bits of the 8-bit slave address are fixed as
1010XXX (Fig. 5), where X can be a 0 or 1. 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.
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 CAT24WC128. After receiving
another acknowledge from the Slave, the Master device
transmits the data to be written into the addressed
memory location. The CAT24WC128 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.
After the Master sends a START condition and the slave
address byte, the CAT24WC128 monitors the bus and
responds with an acknowledge (on the SDA line) when
its address matches the transmitted slave address. The
CAT24WC128 then performs a Read or Write operation
depending on the state of the R/W bit.
Acknowledge
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.
Page Write
The CAT24WC128 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 8bit byte.
The CAT24WC128 writes up to 64 bytes of data, in a
single write cycle, using the Page Write operation. 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 63 additional bytes. After each byte has
been transmitted, CAT24WC128 will respond with an
When the CAT24WC128 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 acFigure 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
X
A1
X
A0
X
X is Don't Care, can be a '0' or a '1'.
5
R/W
5027 FHD F07
Doc. No. 25060-00 6/99 S-1
CAT24WC128
Preliminary
protected and becomes read only. The CAT24WC128
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.
acknowledge, and internally increment the six low order
address bits by one. The high order bits remain unchanged.
If the Master transmits more than 64 bytes before sending
the STOP condition, the address counter ‘wraps around’,
and previously transmitted data will be overwritten.
READ OPERATIONS
When all 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 CAT24WC128 in a single write cycle.
The READ operation for the CAT24WC128 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.
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,
CAT24WC128 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 CAT24WC128 is still busy with the
write operation, no ACK will be returned. If
CAT24WC128 has completed the write operation, an
ACK will be returned and the host can then proceed with
the next read or write operation.
Immediate/Current Address Read
The CAT24WC128’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=16383),
then the counter will ‘wrap around’ to address 0 and
continue to clock out data. After the CAT24WC128
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.
WRITE PROTECTION
Selective/Random Read
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
Selective/Random READ operations allow the Master
device to select at random any memory location for a
Figure 6. Byte Write Timing
S
T
A
R
T
BUS ACTIVITY:
MASTER
SDA LINE
SLAVE
ADDRESS
BYTE ADDRESS
A15–A8
A7–A0
S
S
T
O
P
DATA
P
**
A
C
K
A
C
K
A
C
K
A
C
K
24WC128 F08
*=Don't Care Bit
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+63
P
**
A
C
K
A
C
K
A
C
K
*=Don't Care Bit
Doc. No. 25060-00 6/99 S-1
DATA n
S
T
O
P
A
C
K
A
C
K
A
C
K
A
C
K
24WC128 F09
6
Preliminary
CAT24WC128
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 CAT24WC128 acknowledges, the
Master device sends the START condition and the slave
address again, this time with the R/W bit set to one. The
CAT24WC128 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.
data. The CAT24WC128 will continue to output an 8-bit
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.
The data being transmitted from CAT24WC128 is outputted sequentially with data from address N followed
by data from address N+1. The READ operation address counter increments all of the CAT24WC128 address bits so that the entire memory array can be read
during one operation. If more than E (where E=16383)
bytes are read out, the counter will ‘wrap around’ and
continue to clock out data bytes.
Sequential Read
The Sequential READ operation can be initiated by
either the Immediate Address READ or Selective READ
operations. After the CAT24WC128 sends the initial 8bit byte requested, the Master will respond with an
acknowledge which tells the device it requires more
Figure 8. Immediate Address Read Timing
S
T
A
R
T
BUS ACTIVITY:
MASTER
SDA LINE
SLAVE
ADDRESS
S
T
O
P
DATA
P
S
N
O
A
C
K
A
C
K
8
SCL
SDA
9
8TH BIT
DATA OUT
NO ACK
STOP
24WC128 F10
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
A
C
K
SLAVE
ADDRESS
S
T
O
P
DATA
P
S
A
C
K
A
C
K
*=Don't Care Bit
A
C
K
N
O
A
C
K
24WC128 F11
7
Doc. No. 25060-00 6/99 S-1
CAT24WC128
Preliminary
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
ORDERING INFORMATION
Prefix
Device #
CA
24WC128
Suffix
K
-1.8
I
TE13
T
Optional
Company ID
Product
Number
Temperature Range
Blank = Commercial (0˚ - 70˚C)
I = Industrial (-40˚ - 85˚C)
A = Automotive (-40˚ - 105˚C)*
Package
P: PDIP
K: SOIC (EIAJ)
J: SOIC (JEDEC)
U14: 14 pin TSSOP
* -40˚ to +125˚C is available upon request
Tape & Reel
TE13: 2000/Reel
Operating Voltage
Blank: 2.5V - 6.0V
1.8: 1.8V - 6.0V
24WC128 FIG.13
Notes:
(1) The device used in the above example is a 24WC128KI-1.8TE13 (SOIC, Industrial Temperature, 1.8 Volt to 6 Volt Operating
Voltage, Tape & Reel)
Doc. No. 25060-00 6/99 S-1
8
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