AT93C46E_08 Datasheet, PDF (1/15 Pages) ATMEL Corporation – Three-wire Serial EEPROM 1K (64 x 16)

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
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.
8-lead PDIP
Table 2-1.
Pin Name
CS
SK
Pin Configuration
Function
Chip Select
Serial Data Clock
CS 1
SK 2
DI 3
DO 4
8 VCC
7 NC
6 NC
5 GND
DI
DO
GND
VCC
NC
Serial Data Input
Serial Data Output
Ground
Power Supply
No Connect
8-lead SOIC
CS 1
SK 2
DI 3
DO 4
8 VCC
7 NC
6 NC
5 GND
8-lead TSSOP
CS 1
SK 2
DI 3
DO 4
8 VCC
7 NC
6 NC
5 GND
Three-wire
Serial EEPROM
1K (64 x 16)
AT93C46E
Rev. 5207D–SEEPR–1/08