AT93C46C Datasheet, PDF (1/11 Pages) ATMEL Corporation – 3-Wire Serial EEPROM

Features
• Low-Voltage and Standard-Voltage Operation
– 5.0 (V_CC = 4.5V to 5.5V)
– 2.7 (V_CC = 2.7V to 5.5V)
– 2.5 (V_CC = 2.5V to 5.5V)
• 3-Wire Serial Interface
• Schmitt Trigger, Filtered Inputs for Noise Suppression
• 2 MHz Clock Rate (5V) Compatibility
• Self-Timed Write Cycle (10 ms max)
• High Reliability
– Endurance: 1 Million Write Cycles
– Data Retention: 100 Years
– ESD Protection: > 4000V
• Automotive Grade and Extended Temperature Devices Available
• 8-Pin PDIP and JEDEC SOIC Packages
Description
The AT93C46C provides 1024 bits of serial electrically-erasable programmable read
only memory (EEPROM) organized as 64 words of 16 bits each. The device is opti-
mized for use in many industrial and commercial applications where low-power and
low-voltage operation are essential. The AT93C46C is available in space saving 8-pin
PDIP and 8-pin JEDEC packages.
The AT93C46C is enabled through the Chip Select pin (CS), and accessed via a 3-
wire serial interface consisting of Data Input (DI), Data Output (DO), and Shift Clock
(SK). Upon receiving a READ instruction at DI, the address is decoded and the data is
clocked out serially on the data output pin DO. The WRITE cycle is completely self-
timed and no separate ERASE cycle is required before WRITE. The WRITE cycle is
only enabled when the part is in the ERASE/WRITE ENABLE state. When CS is
brought “high” following the initiation of a WRITE cycle, the DO pin outputs the
READY/BUSY status of the part.
The AT93C46C is available in 4.5V to 5.5V, 2.7V to 5.5V, and 2.5V to 5.5V versions.
3-Wire
Serial EEPROM
1K (64 x 16)
AT93C46C
Pin Configurations
Pin Name
CS
SK
DI
DO
GND
VCC
NC
DC
Function
Chip Select
Serial Data Clock
Serial Data Input
Serial Data Output
Ground
Power Supply
No Connect
Don’t Connect
8-Pin PDIP
CS 1
SK 2
DI 3
DO 4
8 VCC
7 DC
6 NC
5 GND
8-Pin SOIC
CS 1
SK 2
DI 3
DO 4
8 VCC
7 DC
6 NC
5 GND
3-Wire, 1K
Serial E²PROM
Rev. 1122A–07/98
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