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CAT24FC256 Datasheet(PDF) 4 Page - Catalyst Semiconductor

No. de Pieza. CAT24FC256
Descripción  256K-Bit I2C Serial CMOS EEPROM
Descarga  12 Pages
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Fabricante  CATALYST [Catalyst Semiconductor]
Página de inicio  http://www.catalyst-semiconductor.com
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CAT24FC256 Datasheet(HTML) 4 Page - Catalyst Semiconductor

 
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Discontinued
Part
CAT24FC256
4
Doc. No. 1040, Rev. K
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
FUNCTIONAL DESCRIPTION
The CAT24FC256 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 CAT24FC256 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.
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.
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
A0, A1, A2: Device Address Inputs
These pins are hardwired or left connected. When
hardwired, up to eight CAT24FC256's may be addressed
on a single bus system.
When the pins are left
unconnected, the default values are zero.


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