CAT24WC66XA-1.8TE13 datasheet(4/10 Pages) CATALYST

部件名	CAT24WC66XA-1.8TE13

功能描述	64K-Bit I2C Serial CMOS EEPROM

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制造商	CATALYST [Catalyst Semiconductor]

网页	http://www.catalyst-semiconductor.com

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4 / 10 page

CAT24WC66

4

Doc. No. 1037, Rev. H

FUNCTIONAL DESCRIPTION

The CAT24WC66 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 CAT24WC66 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.

PIN DESCRIPTIONS

SCL: Serial Clock

The serial clock input clocks all data transferred into or

out of the device.

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.

A0, A1, A2: Device Address Inputs

These pins are hardwired or left unconnected (for

hardware compatibility with CAT24WC16).

When

hardwired, up to eight CAT24WC66 devices 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. When this pin is tied to Vcc, the top

1/4 array of memory is write protected.

When left

floating, memory is unprotected.

Figure 3. Start/Stop Timing

Figure 2. Write Cycle Timing

Figure 1. Bus Timing

START BIT

SDA

STOP BIT

SCL

tWR

STOP

CONDITION

START

CONDITION

ADDRESS

ACK

8TH BIT

BYTE n

SCL

SDA

tHIGH

SCL

SDA IN

SDA OUT

tLOW

tF

tLOW

tR

tBUF

tSU:STO

tSU:DAT

tHD:DAT

tHD:STA

tSU:STA

tAA

tDH

类似零件编号 - CAT24WC66XA-1.8TE13

制造商	部件名	数据表	功能描述
ON Semiconductor	CAT24WC66XA-1.8-GT2C	147Kb / 11P	64-Kb I2C Serial EEPROM with Partial Array Write Protection August, 2009 ??Rev. 10
	CAT24WC66XA-1.8-GT3C	147Kb / 11P	64-Kb I2C Serial EEPROM with Partial Array Write Protection August, 2009 ??Rev. 10
	CAT24WC66XA-1.8-T2C	147Kb / 11P	64-Kb I2C Serial EEPROM with Partial Array Write Protection August, 2009 ??Rev. 10
	CAT24WC66XA-1.8-T3C	147Kb / 11P	64-Kb I2C Serial EEPROM with Partial Array Write Protection August, 2009 ??Rev. 10

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