93AA46/56/66
1K/2K/4K 1.8V Microwire Serial EEPROM
FEATURES
PACKAGE TYPES
DIP
• Single supply with programming operation down
to 1.8V
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
CS
• Self-timed ERASE and WRITE cycles
(including auto-erase)
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
• 10,000,000 ERASE/WRITE cycles guaranteed on
93AA56 and 93AA66
1
2
3
4
8
7
6
5
ORG
Vss
DO
DI
NU
Vcc
CS
• 1,000,000 E/W cycles guaranteed on 93AA46
• Data retention > 200 years
• 8-pin PDIP/SOIC
(SOIC in JEDEC and EIAJ standards)
• Temperature ranges supported
CLK
- Commercial (C):
0°C to +70°C
DESCRIPTION
BLOCK DIAGRAM
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 non-volatile memory applications. The 93AA
Series is available in standard 8-pin DIP and surface
mount SOIC packages. The rotated pin-out 93AA46X/
56X/66X are offered in the “SN” package only.
VCC
VSS
ADDRESS
DECODER
MEMORY
ARRAY
ADDRESS
COUNTER
OUTPUT
BUFFER
DATA REGISTER
DO
DI
MODE
DECODE
LOGIC
ORG
CS
CLOCK
GENERATOR
CLK
Microwire is a registered trademark of National Semiconductor Incorporated.
1996 Microchip Technology Inc.
DS20067G-page 1
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