93LC46AB Datasheet, PDF (1/12 Pages) Microchip Technology – 1K 2.5V Microwire Serial EEPROM

93LC46A/B
1K 2.5V Microwire^® Serial EEPROM
FEATURES
• Single supply with operation down to 2.5V
• Low power CMOS technology
- 1 mA active current (typical)
- 1 µA standby current (maximum)
• 128 x 8 bit organization (93LC46A)
• 64 x 16 bit organization (93LC46B)
• Self-timed ERASE and WRITE cycles
(including auto-erase)
• Automatic ERAL before WRAL
• Power on/off data protection circuitry
• Industry standard 3-wire serial interface
• 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 and 8-pin TSSOP packages
• Available for the following temperature ranges:
- Commercial (C):
0°C to +70°C
- Industrial (I):
-40°C to +85°C
PACKAGE TYPE
DIP
SOIC
BLOCK DIAGRAM
MEMORY
ARRAY
ADDRESS
DECODER
ADDRESS
COUNTER
DATA
REGISTER
DI
MODE
DECODE
CS
LOGIC
CLK
CLOCK
GENERATOR
OUTPUT
BUFFER
DO
Vcc
Vss
DESCRIPTION
The Microchip Technology Inc. 93LC46AX/BX are 1K-
bit, low voltage serial Electrically Erasable PROMs.
The device memory is configured as x8 (93LC46A) or
x16 bits (93LC46B). Advanced CMOS technology
makes these devices ideal for low power nonvolatile
memory applications. The 93LC46AX/BX is available
in standard 8-pin DIP, 8-pin surface mount SOIC, and
TSSOP packages. The 93LC46AX/BX are offered only
in a 150-mil SOIC package.
SOIC
TSSOP
CS ₁
CLK 2
DI 3
DO 4
8 Vcc
CS
1
7 NC
CLK
2
6 NC
DI ³
5 Vss
DO
4
8
VCC
NC ¹
7 _NC
Vcc ²
6
NC
CS ³
5
Vss
CLK
4
CS ¹
8 _{NC CLK 2}
DI ³
7 _Vss
DO ⁴
6 _DO
5 _DI
8 _Vcc
7 _NC
6 _NC
5 _Vss
Microwire is a registered trademark of National Semiconductor Incorporated.
 2000 Microchip Technology Inc.
DS21173E-page 1