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93LCS66-SM Datasheet

  • 93LCS66-SM

  • 2K/4K 2.5V Microwire Serial EEPROM with Software Write Prote...

  • 12頁

  • MICROCHIP   MICROCHIP

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93LCS56/66
2K/4K 2.5V Microwire
廬
Serial EEPROM with Software Write Protect
FEATURES
鈥?Single supply with programming operation down
to 2.5V
鈥?Low power CMOS technology
- 1 mA active current typical
- 5
碌
A standby current (typical) at 3.0V
鈥?x16 memory organization
- 128x16 (93LCS56)
- 256x16 (93LCS66)
鈥?Software write protection of user de鏗乶ed memory
space
鈥?Self timed erase and write cycles
鈥?Automatic ERAL before WRAL
鈥?Power on/off data protection
鈥?Industry standard 3-wire serial I/O
鈥?Device status signal during E/W
鈥?Sequential READ function
鈥?1,000,000 E/W cycles guaranteed
鈥?Data retention > 200 years
鈥?8-pin PDIP/SOIC and 14-pin SOIC packages
鈥?Temperature ranges supported
- Commercial (C):
0藲C to +70藲C
- Industrial (I):
-40藲C to +85藲C
BLOCK DIAGRAM
V
CC
V
SS
MEMORY
ARRAY
ADDRESS
DECODER
ADDRESS
COUNTER
OUTPUT
BUFFER
DATA REGISTER
DI
PRE
PE
CS
MODE
DECODE
LOGIC
DO
CLK
CLOCK
GENERATOR
DESCRIPTION
The Microchip Technology Inc. 93LCS56/66 are low volt-
age Serial Electrically Erasable PROMs with memory
capacities of 2K bits/4K bits respectively. A write protect
register is included in order to provide a user de鏗乶ed
region of write protected memory. All memory locations
greater than or equal to the address placed in the write
protect register will be protected from any attempted write
or erase operation. It is also possible to protect the
address in the write protect register permanently by using
a one time only instruction (PRDS). Any attempt to alter
data in a register whose address is equal to or greater
than the address stored in the protect register will be
aborted. Advanced CMOS technology makes this device
ideal for low power non-volatile memory applications.
PACKAGE TYPES
SOIC
NC
CS
DIP
CS
CLK
DI
DO
1
2
3
4
93LCS56
93LCS66
8
7
6
5
V
CC
PRE
PE
V
SS
CS
CLK
DI
DO
1
2
3
4
93LCS56
93LCS66
SOIC
8
7
6
5
V
CC
PRE
PE
V
SS
CLK
NC
DI
DO
NC
1
2
3
4
5
6
7
93LCS56
93LCS66
14
13
12
11
10
9
8
NC
V
CC
PRE
NC
PE
V
SS
NC
Microwire is a registered trademark of National Semiconductor Incorporated.
漏
1996 Microchip Technology Inc.
Preliminary
This document was created with FrameMaker 4 0 4
DS11181D-page 1

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