AT93C46A_07 Datasheet, PDF (1/14 Pages) ATMEL Corporation – Three-wire Automotive Temperature Serial EEPROM

Features
• Low-voltage and Standard-voltage Operation
– 2.7 (V_CC = 2.7V to 5.5V)
• Three-wire Serial Interface
• 2 MHz Clock Rate Compatibility
• Self-timed Write Cycle (10 ms max)
• High Reliability
– Endurance: 1 Million Write Cycles
– Data Retention: 100 Years
• Lead-free/Halogen-free Devices Available
• 8-lead JEDEC SOIC and 8-lead TSSOP Packages
Description
The AT93C46A 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 automotive applications where low-power and low-voltage
operation are essential. The AT93C46A is available in space-saving 8-lead JEDEC
SOIC and 8-lead TSSOP packages.
The AT93C46A is enabled through the Chip Select pin (CS) and accessed via a three-
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 AT93C46A is available in 2.7V to 5.5V versions.
Table 1. Pin Configuration
Pin Name
Function
8-lead SOIC
CS
SK
DI
DO
GND
VCC
NC
DC
Chip Select
Serial Data Clock
Serial Data Input
Serial Data Output
Ground
Power Supply
No Connect
Don’t Connect
CS 1
SK 2
DI 3
DO 4
8 VCC
7 DC
6 NC
5 GND
8-lead TSSOP
CS 1
SK 2
DI 3
DO 4
8 VCC
7 DC
6 NC
5 GND
Three-wire
Automotive
Temperature
Serial EEPROM
1K (64 x 16)
AT93C46A
5089B–SEEPR–2/07