93AA46/56/66
1K/2K/4K 1.8V Microwire
®
Serial EEPROM
FEATURES
• Single supply with programming operation down
to 1.8V
• Low power CMOS technology
- 70
µ
A typical active READ current at 1.8V
- 2
µ
A typical standby current at 1.8V
• ORG pin selectable memory configuration
- 128 x 8- or 64 x 16-bit organization (93AA46)
- 256 x 8- or 128 x 16-bit organization
(93AA56)
- 512 x 8 or 256 x 16 bit organization (93AA66)
• Self-timed ERASE and WRITE cycles
(including auto-erase)
• 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
• 1,000,000 E/W cycles guaranteed
• Data retention > 200 years
• 8-pin PDIP/SOIC
(SOIC in JEDEC and EIAJ standards)
• Temperature ranges supported
- Commercial (C):
- Industrial (I):
0
°
C to
-40
°
C to
+70
°
C
+85
°
C
PACKAGE TYPES
DIP
CS
CLK
DI
DO
1
8
V
CC
NU
ORG
V
SS
93AA46
93AA56
93AA66
2
3
4
7
6
5
SOIC
CS
CLK
DI
DO
1
8
V
CC
NU
ORG
V
SS
93AA46
93AA56
93AA66
2
3
4
7
6
5
SOIC
NU
Vcc
CS
CLK
1
8
ORG
Vss
DO
DI
93AA46X
93AA56X
93AA66X
2
3
4
7
6
5
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 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.
BLOCK DIAGRAM
V
CC
V
SS
MEMORY
ARRAY
ADDRESS
DECODER
ADDRESS
COUNTER
DATA REGISTER
DI
MODE
DECODE
LOGIC
OUTPUT
BUFFER
DO
ORG
CS
CLK
CLOCK
GENERATOR
Microwire is a registered trademark of National Semiconductor Incorporated.
©
1998 Microchip Technology Inc.
DS20067H-page 1
ETC [ ETC ]
