1. Features
•
Low-voltage and Standard-voltage Operation
•
•
•
•
•
– 1.8 (V
CC
= 1.8V to 5.5V)
Internal Organization
– 64 x 16
Three-wire Serial Interface
2 MHz Clock Rate (5V) Compatibility
Self-timed Write Cycle (5 ms max)
High Reliability
– Endurance: 1 Million Write Cycles
– Data Retention: 100 Years
8-lead PDIP, 8-lead JEDEC SOIC, and 8-lead TSSOP Packages
Lead-free/Halogen-free Devices
•
•
Three-wire
Serial EEPROM
1K (64 x 16)
2. Description
The AT93C46E 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 AT93C46E is available in space-saving 8-
lead PDIP, 8-lead JEDEC SOIC, and 8-lead TSSOP packages.
The AT93C46E 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 DO pin. 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 AT93C46E is available in 1.8V (1.8V to 5.5V) version.
AT93C46E
8-lead PDIP
Table 2-1.
Pin Name
CS
SK
DI
DO
GND
VCC
NC
Pin Configuration
Function
Chip Select
Serial Data Clock
Serial Data Input
Serial Data Output
Ground
Power Supply
No Connect
CS
SK
DI
DO
1
2
3
4
8
7
6
5
VCC
NC
NC
GND
8-lead SOIC
CS
SK
DI
DO
1
2
3
4
8
7
6
5
VCC
NC
NC
GND
8-lead TSSOP
CS
SK
DI
DO
1
2
3
4
8
7
6
5
VCC
NC
NC
GND
Rev. 5207D–SEEPR–1/08
ATMEL [ ATMEL CORPORATION ]
