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CAT24FC66ZD2A-1.8TE13 데이터시트(PDF) 4 Page - Catalyst Semiconductor

부품명 CAT24FC66ZD2A-1.8TE13
상세설명  64K-Bit I2C Serial CMOS EEPROM with Partial Array Write Protection
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CAT24FC65/66
4
Doc. No. 1047, Rev. H
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
FUNCTIONAL DESCRIPTION
The CAT24FC65/66 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 CAT24FC65/66
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
bottom/top (CAT24FC65/CAT24FC66)1/4 of memory
is write protected.
When left floating, memory is
unprotected.
A0, A1, A2: Device Address Inputs
These pins are hardwired or left connected. When
hardwired, up to eight CAT24FC65/66's may be
addressed on a single bus system. When the pins are
left unconnected, the default values are zero.
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


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