CTLST CAT24WC16PI-TE13, CAT24WC16PI-1.8TE13, CAT24WC16PA-TE13, CAT24WC16PA-1.8TE13, CAT24WC16P-TE13 Datasheet

1

CAT24WC01/02/04/08/16

1K/2K/4K/8K/16K-Bit Serial E2PROM

* Catalyst Semiconductor is licensed by Philips Corporation to carry the I2C Bus Protocol.

PIN CONFIGURATION

BLOCK DIAGRAM

PIN FUNCTIONS

Pin Name Function

A0, A1, A2 Device Address Inputs
SDA Serial Data/Address
SCL Serial Clock
WP Write Protect
V

CC

+1.8V to +6.0V Power Supply

V

SS

Ground

DIP Package (P)

24WCXX F03

SOIC Package (J)

5020 FHD F01

FEATURES

■ 400 KHZ I

2

C Bus Compatible*

■ 1.8 to 6.0Volt Operation

■ Low Power CMOS Technology

■ Write Protect Feature

— Entire Array Protected When WP at V

IH

■ Page Write Buffer

■ Self-Timed Write Cycle with Auto-Clear

■ 1,000,000 Program/Erase Cycles

■ 100 Year Data Retention

■ 8-pin DIP, 8-pin SOIC or 8 pin TSSOP

■ Commercial, Industrial and Automotive

Temperature Ranges

DESCRIPTION

The CAT24WC01/02/04/08/16 is a 1K/2K/4K/8K/16K­bit Serial CMOS E2PROM internally organized as 128/
256/512/1024/2048 words of 8 bits each. Catalyst’s
advanced CMOS technology substantially reduces de­vice power requirements. The the CAT24WC01/02/04/

08/16 feature a 16-byte page write buffer. The device
operates via the I2C bus serial interface, has a special
write protection feature, and is available in 8-pin DIP, 8­pin SOIC or 8-pin TSSOP.

© 1999 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice

8
7
6
5

V

CC

WP
SCL
SDA

A

2

A

0

A

1

V

SS

1
2
3
4

TSSOP Package (U)

(* Available for 24WC01 and 24WC02 only)

D

OUT

ACK

SENSE AMPS

SHIFT REGISTERS

CONTROL

LOGIC

WORD ADDRESS

BUFFERS

START/STOP

LOGIC

STATE COUNTERS
SLAVE

ADDRESS
COMPARATORS

E2PROM

V

CC

EXTERNAL LOAD

COLUMN

DECODERS

XDEC

DATA IN STORAGE

HIGH VOL TAGE/

TIMING CONTROL

V

SS

WP

SCL

A

0

A1
A2

SDA

A

2

A

0

A

1

V

SS

1
2
3
4

8
7
6
5

V

CC

WP
SCL
SDA

A

0

V

CC

WP
SCL
SDA

1
2
3
4

8
7
6
5

A

1

A

2

V

SS

Doc. No. 25051-00 3/98 S-1

CAT24WC01/02/04/08/16

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Doc. No. 25051-00 3/98 S-1

ABSOLUTE MAXIMUM RATINGS*

Temperature Under Bias ................. –55°C to +125°C

Storage Temperature....................... –65°C to +150°C

Voltage on Any Pin with

Respect to Ground

(1)

........... –2.0V to +V

CC

+ 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

*COMMENT

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.

RELIABILITY CHARACTERISTICS

Symbol Parameter Min. Max. Units Reference Test Method

N

END

(3)

Endurance 1,000,000 Cycles/Byte MIL-STD-883, Test Method 1033

T

DR

(3)

Data Retention 100 Years MIL-STD-883, Test Method 1008

V

ZAP

(3)

ESD Susceptibility 2000 Volts MIL-STD-883, Test Method 3015

I

LTH

(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

I

CC

Power Supply Current 3 mA f

SCL

= 100 KHz

I

SB

(5)

Standby Current (VCC = 5.0V) 0 µAVIN = GND or V

CC

I

LI

Input Leakage Current 10 µAVIN = GND to V

CC

I

LO

Output Leakage Current 10 µAV

OUT

= GND to V

CC

V

IL

Input Low Voltage –1 VCC x 0.3 V

V

IH

Input High Voltage VCC x 0.7 VCC + 0.5 V

V

OL1

Output Low Voltage (VCC = 3.0V) 0.4 V IOL = 3 mA

V

OL2

Output Low Voltage (VCC = 1.8V) 0.5 V IOL = 1.5 mA

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) = 0µA (<900nA).

CAPACITANCE TA = 25°C, f = 1.0 MHz, VCC = 5V

Symbol Test Max. Units Conditions

C

I/O

(3)

Input/Output Capacitance (SDA) 8 pF V

I/O

= 0V

C

IN

(3)

Input Capacitance (A0, A1, A2, SCL, WP) 6 pF V

IN

= 0V

CAT24WC01/02/04/08/16

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Doc. No. 25051-00 3/98 S-1

A.C. CHARACTERISTICS

VCC = +1.8V to +6.0V, unless otherwise specified.

Read & Write Cycle Limits

Symbol Parameter 1.8V, 2.5V 4.5V-5.5V

Min. Max. Min. Max. Units

F

SCL

Clock Frequency 100 400 kHz

T

I

(1)

Noise Suppression Time 200 200 ns
Constant at SCL, SDA Inputs

t

AA

SCL Low to SDA Data Out 3.5 1 µs
and ACK Out

t

BUF

(1)

Time the Bus Must be Free Before 4.7 1.2 µs
a New Transmission Can Start

t

HD:STA

Start Condition Hold Time 4 0.6 µs

t

LOW

Clock Low Period 4.7 1.2 µs

t

HIGH

Clock High Period 4 0.6 µs

t

SU:STA

Start Condition Setup Time 4.7 0.6 µs
(for a Repeated Start Condition)

t

HD:DAT

Data In Hold Time 0 0 ns

t

SU:DAT

Data In Setup Time 50 50 ns

t

R

(1)

SDA and SCL Rise Time 1 0.3 µs

t

F

(1)

SDA and SCL Fall Time 300 300 ns

t

SU:STO

Stop Condition Setup Time 4 0.6 µs

t

DH

Data Out Hold Time 100 100 ns

Note:
(1) This parameter is tested initially and after a design or process change that affects the parameter.
(2) t

PUR

and t

PUW

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.

Write Cycle Limits

Symbol Parameter Min. Typ. Max Units

t

WR

Write Cycle Time 10 ms

Power-Up Timing

(1)(2)

Symbol Parameter Max. Units

t

PUR

Power-up to Read Operation 1 ms

t

PUW

Power-up to Write Operation 1 ms

CAT24WC01/02/04/08/16

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Doc. No. 25051-00 3/98 S-1

FUNCTIONAL DESCRIPTION

The CAT24WC01/02/04/08/16 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. Data transfer is controlled by the Master
device which generates the serial clock and all START
and STOP conditions for bus access. The CAT24WC01/
02/04/08/16 operates as a Slave device. Both the Mas­ter and Slave devices can operate as either transmitter
or receiver, but the Master device controls which mode
is activated. A maximum of 8 devices (24WC01 and
24WC02), 4 devices (24WC04), 2 devices (24WC08)
and 1 device (24WC16) may be connected to the bus as
determined by the device address inputs A0, A1, and A2.

PIN DESCRIPTIONS

SCL: Serial Clock

The CAT24WC01/02/04/08/16 serial clock input pin is
used to clock all data transfers into or out of the device.
This is an input pin.

SDA: Serial Data/Address
The CAT24WC01/02/04/08/16 bidirectional serial data/
address pin is used to transfer 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.

A0, A1, A2: Device Address Inputs
These inputs set device address when cascading mul­tiple devices. When these pins are left floating the
default values are zeros (except for the 24WC01).

A maximum of eight devices can be cascaded when

Figure 2. Write Cycle Timing

Figure 1. Bus Timing

Figure 3. Start/Stop Timing

5020 FHD F05

5020 FHD F04

5020 FHD F03

t

HIGH

SCL

SDA IN

SDA OUT

t

LOW

t

F

t

LOW

t

R

t

BUF

t

SU:STO

t

SU:DAT

t

HD:DAT

t

HD:STA

t

SU:STA

t

AA

t

DH

t

WR

STOP
CONDITION

START
CONDITION

ADDRESS

ACK8TH BIT

BYTE n

SCL

SDA

START BIT

SDA

STOP BIT

SCL

CAT24WC01/02/04/08/16

5

Doc. No. 25051-00 3/98 S-1

using either 24WC01 or 24WC02 device. All three
address pins are used for these densities. If only one
24WC02 is addressed on the bus, all three address pins
(A0, A1and A2) can be left floating or connected to VSS.
If only one 24WC01 is addressed on the bus, all three
address pins (A0, A1and A2) must be connected to VSS.

A total of four devices can be addressed on a single bus
when using 24WC04 device. Only A1 and A2 address
pins are used with this device. The A0 address pin is a
no connect pin and can be tied to V

SS

or left floating. If
only one 24WC04 is being addressed on the bus, the
address pins (A1 and A2) can be left floating or con­nected to VSS.

Only two devices can be cascaded when using 24WC08.
The only address pin used with this device is A2. The A0
and A1 address pins are no connect pins and can be tied
to V

SS

or left floating. If only one 24WC08 is being
addressed on the bus, the address pin (A2) can be left
floating or connected to VSS.

The 24WC16 is a stand alone device. In this case, all
address pins (A0, A1and A2) are no connect pins and
can be tied to V

SS

or left floating.

WP: Write Protect
If the WP pin is tied to VCC the entire memory array
becomes Write Protected (READ only). When the WP
pin is tied to VSS or left floating normal read/write opera­tions are allowed to the device.

I2C BUS PROTOCOL

The following defines the features of the I2C bus proto­col:

(1) Data transfer may be initiated only when the bus is

not busy.

(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

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 CAT24WC01/02/04/08/16
monitor 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.

DEVICE ADDRESSING

The bus Master begins a transmission by sending a
START condition. The Master then 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 for the CAT24WC01/02/04/08/16 (see Fig. 5).
The next three significant bits (A2, A1, A0) are the device
address bits and define which device or which part of the
device the Master is accessing. Up to eight CAT24WC01/
02, four CAT24WC04, two CAT24WC08, and one
CAT24WC16 may be individually addressed by the
system. 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.

After the Master sends a START condition and the slave
address byte, the CAT24WC01/02/04/08/16 monitors
the bus and responds with an acknowledge (on the SDA

Figure 4. Acknowledge Timing

5020 FHD F06

ACKNOWLEDGE

1

START

SCL FROM

MASTER

89

DATA OUTPUT

FROM TRANSMITTER

DATA OUTPUT

FROM RECEIVER

CAT24WC01/02/04/08/16

6

Doc. No. 25051-00 3/98 S-1

line) when its address matches the transmitted slave
address. The CAT24WC01/02/04/08/16 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.

The CAT24WC01/02/04/08/16 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.

When the CAT24WC01/02/04/08/16 is in 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 CAT24WC01/02/04/08/16 will
continue to transmit data. If no acknowledge is sent by
the Master, the device terminates data transmission and
waits for a STOP condition.

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
the byte address that is to be written into the address
pointer of the CAT24WC01/02/04/08/16. After receiving
another acknowledge from the Slave, the Master device
transmits the data byte to be written into the addressed
memory location. The CAT24WC01/02/04/08/16 ac­knowledge once more and the Master generates the
STOP condition, at which time the device begins its
internal programming cycle to nonvolatile memory. While
this internal cycle is in progress, the device will not
respond to any request from the Master device.

Page Write

The CAT24WC01/02/04/08/16 writes up to 16 bytes of
data in a single write cycle, using the Page Write
operation. The Page Write operation is initiated in the
same manner as counter will ‘wrap around’ to address

Figure 5. Slave Address Bits

1 0 1 0 A2 A1 A0 R/W

1 0 1 0 A2 A1 a8 R/W

1 0 1 0 A2 a9 a8 R/W

1 0 1 0 a10 a9 a8 R/W

24WC01/02

24WC04

24WC08

24WC16

* A0, A1 and A2 correspond to pin 1, pin 2 and pin 3 of the device.
** a8, a9 and a10 correspond to the address of the memory array address word.
*** A0, A1 and A2 must compare to its corresponding hard wired input pins (pins 1, 2 and 3).

CAT24WC01/02/04/08/16

7

Doc. No. 25051-00 3/98 S-1

24WCXX F09

Figure 7. Page Write Timing

5020 FHD F08

Figure 6. Byte Write Timing

*

P=7 for CAT24WC01 and P=15 for CAT24WC02/04/08/16
* = Don't care for CAT24WC01

BUS ACTIVITY :

MASTER

SDA LINE

DATA n+P

BYTE

ADDRESS (n)

A
C
K

A
C
K

DATA n

A
C
K

S
T
O
P

S

A
C
K

DATA n+1

A
C
K

S
T
A
R
T

P

SLAVE

ADDRESS

NOTE: IN THIS EXAMPLE n = XXXX 0000(B); X = 1 or 0

*

the Byte Write operation, however instead of terminating
after the initial word is transmitted, the Master is allowed
to send up to P (P=7 for 24WC01 and P=15 for
CAT24WC02/04/08/16) additional bytes. After each byte
has been transmitted the CAT24WC01/02/04/08/16 will
respond with an acknowledge, and internally increment
the low order address bits by one. The high order bits
remain unchanged.

If the Master transmits more than P+1 bytes prior to
sending the STOP condition, the address counter ‘wraps
around’, and previously transmitted data will be overwrit­ten.

Once all P+1 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 CAT24WC01/02/04/08/16 in a single write cycle.

Acknowledge Polling

The 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, the CAT24WC01/02/04/08/16 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 the
CAT24WC01/02/04/08/16 is still busy with the write
operation, no ACK will be returned. If the CAT24WC01/
02/04/08/16 has completed the write operation, an ACK
will be returned and the host can then proceed with

thenext read or write operation.

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 CAT24WC01/
02/04/08/16 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 CAT24WC01/02/04/08/16
is initiated in the same manner as the write operation
with the one exception that the R/W bit is set to a one.
Three different READ operations are possible: Immedi­ate Address READ, Selective READ and Sequential
READ.

Immediate Address Read

The CAT24WC01/02/04/08/16’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 = 127 for 24WC01, 255 for 24WC02, 511 for 24WC04,
1023 for 24WC08, and 2047 for 24WC16), then the
counter will 'wrap around' to address 0 and continue to

BYTE

ADDRESS

SLAVE

ADDRESS

S

A
C
K

A
C
K

DATA

A
C
K

S
T
O
P

P

BUS ACTIVITY :

MASTER

SDA LINE

S
T
A
R
T

CAT24WC01/02/04/08/16

8

Doc. No. 25051-00 3/98 S-1

clock out data. After the CAT24WC01/02/04/08/16 re­ceives its slave address information (with the R/W bit set
to one), it issues an acknowledge, then transmits the 8­bit byte requested. The master device does not send an
acknowledge but will generate a STOP condition.

Selective Read

Selective READ operations allow the Master device to
select at random any memory location for a READ
operation. The Master device first performs a ‘dummy’
write operation by sending the START condition, slave
address and byte address of the location it wishes to
read. After the CAT24WC01/02/04/08/16 acknowledge
the word address, the Master device resends the START
condition and the slave address, this time with the R/W
bit set to one. The CAT24WC01/02/04/08/16 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.

Sequential Read

The Sequential READ operation can be initiated by
either the immediate Address READ or Selective READ
operations. After the 24WC01/02/04/08/16 sends initial
8-bit byte requested, the Master will respond with an
acknowledge which tells the device it requires more
data. The CAT24WC01/02/04/08/16 will continue to
output an 8-bit byte for each acknowledge sent by the
Master. The operation is terminated when the Master
fails to respond with an acknowledge, thus sending the
STOP condition.

The data being transmitted from the CAT24WC01/02/
04/08/16 is outputted sequentially with data from ad­dress N followed by data from address N+1. The READ
operation address counter increments all of the
CAT24WC01/02/04/08/16 address bits so that the en­tire memory array can be read during one operation. If
more than the E (where E = 127 for 24WC01, 255 for
24WC02, 511 for 24WC04, 1023 for 24WC08, and 2047
for 24WC16) bytes are read out, the counter will “wrap
around” and continue to clock out data bytes.

5020 FHD F10

Figure 8. Immediate Address Read Timing

SCL

SDA 8TH BIT

STOPNO ACKDATA OUT

89

SLAVE

ADDRESS

S

A
C
K

DATA

N
O

A
C
K

S
T

O

P

P

BUS ACTIVITY :

MASTER

SDA LINE

S
T
A
R
T

CAT24WC01/02/04/08/16

9

Doc. No. 25051-00 3/98 S-1

24WCXX F14

Notes:
(1) The device used in the above example is a 24WC02JI-1.8TE13 (SOIC, Industrial Temperature, 1.8 Volt to 6 Volt Operating

Voltage, Tape & Reel)

ORDERING INFORMATION

5020 FHD F12

Figure 10. Sequential Read Timing

24WCXX F11

* = Don't Care for 24WC01

Figure 9. Selective Read Timing

** A vailable for 24WC01 and 24WC02

SLAVE

ADDRESS

S

A
C
K

N
O

A
C
K

S
T
O
P

P

BUS ACTIVITY :

MASTER

SDA LINE

S
T
A

R

T

BYTE

ADDRESS (n)

S

A
C
K

DATA n

SLAVE

ADDRESS

A

C

K

S
T
A

R

T

*

BUS ACTIVITY :

MASTER

SDA LINE

DATA n+xDATA n

A
C
K

A
C
K

DATA n+1

A
C
K

S
T
O
P

N
O

A
C
K

DATA n+2

A
C
K

P

SLAVE

ADDRESS

Prefix Device # Suffix

24WC02

J

I

TE13

Product Number

24WC01: 1K
24WC02: 2K
24WC04: 4K
24WC08: 8K
24WC16: 16K

Tape & Reel

TE13: 2000/Reel

Package

P: PDIP
J: SOIC (JEDEC)
U: TSSOP**

Operating V oltage

Blank: 2.5V - 6.0V

1.8: 1.8V - 6.0V

-1.8

CAT

Temperature Range

Blank = Commercial (0˚ - 70˚C)
I = Industrial (-40˚ - 85˚C)
A = Automotive (-40˚ - 105˚C)*

* -40˚ to +125˚C is available upon request

Optional
Company ID