AT93C46D_08 Datasheet, PDF (1/21 Pages) ATMEL Corporation – Three-wire Serial EEPROM 1K (128 x 8 or 64 x 16)

Features
• Low-voltage and Standard-voltage Operation
– 1.8 (V_CC = 1.8V to 5.5V)
• User-selectable Internal Organization
– 1K: 128 x 8 or 64 x 16
• Three-wire Serial Interface
• 2 MHz Clock Rate (5V)
• Self-timed Write Cycle (5 ms max)
• High Reliability
– Endurance: 1 Million Write Cycles
– Data Retention: 100 Years
• 8-lead JEDEC PDIP, 8-lead JEDEC SOIC, 8-lead Ultra Thin mini-MAP (MLP 2x3), 8-lead
TSSOP and 8-ball dBGA2 Packages
• Die Sales: Wafer Form, Tape and Reel, and Bumped Wafers
Description
The AT93C46D provides 1024 bits of serial electrically erasable programmable read-
only memory (EEPROM), organized as 64 words of 16 bits each (when the ORG pin is
connected to VCC), and 128 words of 8 bits each (when the ORG pin is tied to
ground). The device is optimized for use in many industrial and commercial applica-
tions where low-power and low-voltage operations are essential. The AT93C46D is
available in space-saving 8-lead PDIP, 8-lead JEDEC SOIC, 8-lead Ultra Thin mini-
MAP (MLP 2x3), 8-lead TSSOP, and 8-lead dBGA2 packages.
The AT93C46D 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 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 AT93C46D is available in 1.8 (1.8V to 5.5V) version.
Table 0-1.
Pin Name
CS
SK
DI
Pin Configurations
Function
Chip Select
Serial Data Clock
Serial Data Input
8-lead SOIC
CS 1
SK 2
DI 3
DO 4
8 VCC
7 NC
6 ORG
5 GND
8-lead dBGA2
VCC 8 1 CS
NC 7 2 SK
ORG 6 3 D1
GND 5 4 D0
Bottom View
DO
Serial Data Output
8-lead PDIP
8-lead Ultra Thin mini-MAP (MLP 2x3)
GND
VCC
ORG
NC
Ground
Power Supply
Internal Organization
No Connect
CS 1
SK 2
DI 3
DO 4
8 VCC
7 NC
6 ORG
5 GND
VCC 8
NC 7
ORG 6
GND 5
1 CS
2 SK
3 DI
4 DO
8-lead TSSOP
Bottom View
CS 1
SK 2
DI 3
DO 4
8 VCC
7 NC
6 ORG
5 GND
Three-wire
Serial
EEPROM
1K (128 x 8 or 64 x 16)
AT93C46D
5193F–SEEPR–1/08