AT93C86A_08 Datasheet, PDF (1/14 Pages) ATMEL Corporation – Three-wire Automotive Temperature Serial EEPROM 16K (2048 x 8 or 1024 x 16)

1. Features
• Medium-voltage and Standard-voltage Operation
– 2.7 (V_CC = 2.7V to 5.5V)
• Automotive Temperature Range –40°C to +125°C
• User Selectable Internal Organization
– 16K: 2048 x 8 or 1024 x 16
• 3-wire Serial Interface
• Sequential Read Operation
• 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
• Lead-Free/Halogen-Free Devices Available
• 8-lead JEDEC SOIC and 8-lead TSSOP Packages
2. Description
The AT93C86A provides 16384 bits of serial electrically erasable programmable read
only memory (EEPROM), organized as 1024 words of 16 bits each when the ORG pin
is connected to V_CC and 2048 words of 8 bits each when it is tied to ground. The
device is optimized for use in many automotive applications where low-power and
low-voltage operations are essential. The AT93C86A is available in space saving 8-
lead JEDEC SOIC and 8-lead TSSOP packages.
Table 2-1.
Pin Name
Pin Configuration
Function
8-lead SOIC
CS
Chip Select
CS 1
8 VCC
SK
Serial Data Clock
SK 2
7 DC
DI 3
6 ORG
DI
Serial Data Input
DO 4
5 GND
DO
Serial Data Output
GND
Ground
VCC
ORG
DC
Power Supply
Internal Organization
Don’t Connect
8-lead TSSOP
CS 1
SK 2
DI 3
DO 4
8 VCC
7 DC
6 ORG
5 GND
The AT93C86A 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 AT93C86A is available in a 2.7V to 5.5V version.
Three-wire
Automotive
Temperature
Serial
EEPROM
16K (2048 x 8 or 1024 x 16)
AT93C86A
Rev. 5096E–SEEPR–1/08