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Features
? Low-voltage and Standard-voltage Operation
?
– 2.7 (V CC = 2.7V to 5.5V)
– 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 (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
Three-wire
Serial
(MLP 2x3), 8-lead TSSOP and 8-ball dBGA2 Packages
Description
The AT93C46 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-
EEPROM
1K (128 x 8 or 64 x 16)
AT93C46
tions 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.
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
Note:
Not recommended for new
design; please refer to
AT93C46D datasheet.
Pin Name
Function
8-lead SOIC
8-lead dBGA2
CS
SK
Chip Select
Serial Data Clock
CS
SK
DI
DO
1
2
3
4
8
7
6
5
VCC
DC
ORG
GND
VCC
DC
ORG
GND
8
7
6
5
1
2
3
4
C S
S K
D1
D0
DI
Serial Data Input
Bottom View
DO
Serial Data Output
8-lead PDIP
8-lead SOIC
Rotated (R)
GND
VCC
ORG
Ground
Power Supply
Internal Organization
CS
SK
DI
DO
1
2
3
4
8
7
6
5
VCC
DC
ORG
GND
DC
VCC
CS
SK
(1K JEDEC Only)
1 8
2 7
3 6
4 5
ORG
GND
DO
DI
DC
Don’t Connect
8-lead Ultra Thin mini-MAP (MLP 2x3)
8-lead TSSOP
VCC
DC
ORG
GND
8
7
6
5
1
2
3
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
1
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