Features
• Low-voltage and Standard-voltage Operation
•
•
•
•
•
•
•
– 2.7 (VCC = 2.7V to 5.5V)
– 1.8 (VCC = 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 (10 ms max)
High Reliability
– Endurance: 1 Million Write Cycles
– Data Retention: 100 Years
Automotive Grade Devices Available
8-lead JEDEC PDIP, 8-lead JEDEC SOIC, 8-lead EIAJ SOIC, 8-lead Ultra Thin mini-MAP
(MLP 2x3), 8-lead TSSOP and 8-ball dBGA2 Packages
Description
Three-wire
Serial
EEPROM
1K (128 x 8 or 64 x 16)
The AT93C46 provides 1024 bits of serial electrically erasable programmable readonly 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 applications where low-power and low-voltage operations are essential. The AT93C46 is
available in space-saving 8-lead PDIP, 8-lead JEDEC SOIC, 8-lead EIAJ SOIC, 8-lead
Ultra Thin mini-MAP (MLP 2x3), 8-lead TSSOP, and 8-lead dBGA2 packages.
AT93C46
Note:
Not recommended for new
design; please refer to
AT93C46D datasheet.
The AT93C46 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 AT93C46 is available in 2.7V to 5.5V and 1.8V to 5.5V versions.
Table 1. Pin Configurations
Pin Name
CS
Chip Select
SK
Serial Data Clock
DI
Serial Data Output
GND
Ground
VCC
Power Supply
ORG
Internal Organization
DC
Don’t Connect
8-lead dBGA2
Serial Data Input
DO
8-lead SOIC
Function
CS
SK
DI
DO
1
2
3
4
VCC
DC
ORG
GND
VCC
DC
ORG
GND
8
7
6
5
8
1
7
2
6
3
5
4
CS
SK
D1
D0
Bottom View
8-lead PDIP
CS
SK
DI
DO
1
2
3
4
8
7
6
5
VCC
DC
ORG
GND
8-lead SOIC
Rotated (R)
(1K JEDEC Only)
DC
VCC
CS
SK
1
2
3
4
ORG
GND
DO
DI
8
7
6
5
8-lead Ultra Thin mini-MAP (MLP 2x3)
8-lead TSSOP
VCC
DC
ORG
GND
8
1
7
2
6
3
5
4
CS
SK
DI
DO
CS
SK
DI
DO
1
2
3
4
8
7
6
5
VCC
DC
ORG
GND
Bottom View
5140B–SEEPR–2/07
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