Not recommended for new designs –
Please use 93AA46C, 93AA56C or
93AA66C.
93AA46/56/66
1K/2K/4K 1.8V Microwire Serial EEPROM
Features:
Package Types
• Single supply with programming operation down
to 1.8V
PDIP
CS
CLK
DI
1
2
3
4
8
7
6
5
VCC
NU
• Low-power CMOS technology:
- 70 µA typical active read current at 1.8V
- 2 µA typical standby current at 1.8V
• ORG pin selectable memory configuration:
- 128 x 8- or 64 x 16-bit organization (93AA46)
ORG
VSS
DO
- 256 x 8- or 128 x 16-bit organization
(93AA56)
SOIC
- 512 x 8 or 256 x 16-bit organization (93AA66)
1
2
3
4
8
7
6
5
VCC
NU
• Self-timed erase and write cycles
(including auto-erase)
CS
CLK
• Automatic ERAL before WRAL
• Power on/off data protection circuitry
• Industry standard 3-wire serial I/O
• Device status signal during erase/write cycles
• Sequential read function
ORG
VSS
DI
DO
SOIC
• 1,000,000 E/W cycles ensured
• Data retention > 200 years
1
2
3
4
8
7
6
5
ORG
Vss
DO
DI
NU
Vcc
CS
• 8-pin PDIP/SOIC
(SOIC in JEDEC and EIAJ standards)
• Temperature ranges supported:
- Commercial (C):
- Industrial (I):
0°C to +70°C
-40°C to +85°C
CLK
Description:
The Microchip Technology Inc. 93AA46/56/66 are 1K,
2K and 4K low voltage serial Electrically Erasable
PROMs. The device memory is configured as x8 or x16
bits depending on the ORG pin setup. Advanced
CMOS technology makes these devices ideal for low
power nonvolatile memory applications. The 93AA
Series is available in standard 8-pin PDIP and surface
mount SOIC packages. The rotated pin-out 93AA46X/
56X/66X are offered in the “SN” package only.
Block Diagram
VCC VSS
Address
Decoder
Memory
Array
Address
Counter
Data
Register
Output
Buffer
DO
DI
Mode
Decode
Logic
ORG
CS
Clock
Generator
CLK
2004 Microchip Technology Inc.
DS20067J-page 1