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Fairchild Semiconductor Electronic Components Datasheet

FM25C160U Datasheet

16K-Bit SPI Interface Serial CMOS EEPROM

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February 2002
FM25C160U
16K-Bit SPI™ Interface
Serial CMOS EEPROM
General Description
The FM25C160U is a 16K bit serial interface CMOS EEPROM
(Electrically Erasable Programmable Read-Only Memory). This
device fully conforms to the SPI 4-wire protocol which uses Chip
Select (/CS), Clock (SCK), Data-in (SI) and Data-out (SO) pins to
synchronously control data transfer between the SPI microcontroller
and the EEPROM. In addition, the serial interface allows a minimal
pin count, packaging designed to simplify PC board layout re-
quirements and offers the designer a variety of low voltage and low
power options.
This SPI EEPROM family is designed to work with the 68HC11 or
any other SPI-compatible, high-speed microcontroller and offers
both hardware (/WP pin) and software ("block write") data protec-
tion. For example, entering a 2-bit code into the STATUS REGIS-
TER prevents programming in a selected block of memory and all
programming can be inhibited by connecting the /WP pin to VSS;
allowing the user to protect the entire array or a selected section.
In addition, SPI devices feature a /HOLD pin, which allows a
temporary interruption of the datastream into the EEPROM.
Fairchild EEPROMs are designed and tested for applications
requiring high endurance, high reliability, and low power con-
sumption for a continuously reliable non-volatile solution for all
markets.
Functions
I SPI MODE 0 interface
I 16K bits organized as 2048 x 8
I Extended 2.7V to 5.5V operating voltage
I 2.1 MHz operation @ 4.5V - 5.5V
I Self-timed programming cycle
I "Programming complete" indicated by STATUS REGISTER
polling
I /WP pin and BLOCK WRITE protection
Features
I Sequential read of entire array
I 16 byte "Page write" mode to minimize total write time per
byte
I /WP pin and BLOCK WRITE protection to prevent inadvert-
ent programming as well as programming ENABLE and
DISABLE opcodes.
I /HOLD pin to suspend data transfer
I Typical 1µA standby current (ISB) for "L" devices and 0.1µA
standby current for "LZ" devices.
I Endurance: Up to 1,000,000 data changes
I Data retention greater than 40 years
Block Diagram
/CS
/HOLD
SCK
SI
Instruction
Register
Address
Counter/
Register
Decoder
Instruction
Decoder
Control Logic
and Clock
Generators
Program
Enable
VPP
High Voltage
Generator
and
Program
Timer
EEPROM Array
VCC
VSS
/WP
SPI™ is a trademark of Motorola Corporation
Read/Write Amps
Data In/Out Register
8 Bits
Non-Volatile
Status Register
Data Out
Buffer
SO
© 2002 Fairchild Semiconductor Corporation
FM25C160U Rev. B
1
www.fairchildsemi.com


Fairchild Semiconductor Electronic Components Datasheet

FM25C160U Datasheet

16K-Bit SPI Interface Serial CMOS EEPROM

No Preview Available !

Connection Diagram
Dual-In-Line Package (N) and SO Package (M8)
/CS 1
8 VCC
SO 2
7 /HOLD
FM25C160U
/WP 3
6 SCK
VSS 4
5 SI
Pin Names
Top View
See Package Number N08E (N) and M08A (M8)
/CS
SO
/WP
VSS
SI
SCK
/HOLD
VCC
Chip Select Input
Serial Data Output
Write Protect
Ground
Serial Data Input
Serial Clock Input
Suspends Serial Data
Power Supply
Ordering Information
FM 25 C XX U
LZ E XX
Package
Temp. Range
Voltage Operating Range
Density/Mode
Interface
Letter Description
N 8-pin DIP
M8 8-pin SO
None
V
E
0 to 70°C
-40 to +125°C
-40 to +85°C
Blank
L
LZ
4.5V to 5.5V
2.7V to 5.5V
2.7V to 5.5V and
<1µA Standby Current
Ultralite CS100UL Process
160 16K, mode 0
C CMOS technology
25 SPI
FM Fairchild Nonvolatile
Memory Prefix
FM25C160U Rev. B
2 www.fairchildsemi.com


Part Number FM25C160U
Description 16K-Bit SPI Interface Serial CMOS EEPROM
Maker Fairchild Semiconductor
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FM25C160U Datasheet PDF






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