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參數(shù)資料
| 型號： | NM24C32UFVN |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | PROM |
| 英文描述： | I2C Serial EEPROM |
| 中文描述： | 4K X 8 I2C/2-WIRE SERIAL EEPROM, PDIP8 |
| 封裝： | PLASTIC, DIP-8 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 89K |
| 代理商： | NM24C32UFVN |
1
www.fairchildsemi.com
NM24C32U Rev. C.1
N
PRELIMINARY
August 1999
1999 Fairchild Semiconductor Corporation
NM24C32U
32K-Bit Serial EEPROM with Write Protect
2-Wire Bus Interface
General Description:
The NM24C32U is a 32K (32,768) bit serial interface CMOS
EEPROM (Electrically Erasable Programmable Read-Only
Memory). This device fully conforms to the
Extended
I
2
C 2-wire
protocol which uses Clock (SCL) and Data I/O (SDA) pins to
synchronously clock data between the "master" (for example a
microprocessor) and the "slave" (the EEPROM device). In addi-
tion, the serial interface allows a minimal pin count packaging
designed to simplify PC board layout requirements and offers the
designer a variety of low voltage and low power options.
NM24C32U incorporates a hardware "Write Protect" feature, by
which, the upper half of the memory can be disabled against
programming by connecting the WP pin to V
CC
. This section of
memory then effectively becomes a ROM (Read-Only Memory)
and can no longer be programmed as long as WP pin is connected
to V
CC
.
Fairchild EEPROMs are designed and tested for applications requir-
ing high endurance, high reliability and low power consumption for a
continuously reliable non-volatile solution for all markets.
Block Diagram
Functions
I
I
2
C compatible interface
I
32,768 bits organized as 4,096 x 8
I
Extended 2.7V – 5.5V operating voltage
I
100 KHz or 400 KHz operation
I
Self timed programming cycle (6ms typical)
I
"Programming complete" indicated by ACK polling
I
Memory "Upper Block" Write Protect pin
Features
I
The I
2
C interface allows the smallest I/O pincount of any
EEPROM interface
I
32 byte page write mode to minimize total write time per byte
I
Low V
CC
programming lockout (3.8V)
—
"H" option (Standard V
CC
range) parts only
I
Typical 200
μ
A active current (I
CCA
)
I
Typical 1
μ
A standby current (I
SB
) for "L" devices and 0.1
μ
A
standby current for "LZ" devices
I
Endurance: Up to 1,000,000 data changes
I
Data retention greater than 40 years
DS800011-1
H.V. GENERATION
TIMING &CONTROL
E2PROM
ARRAY
YDEC
DATA REGISTER
XDEC
CONTROL
LOGIC
WORD
ADDRESS
COUNTER
SLAVE ADDRESS
REGISTER &
COMPARATOR
START
STOP
LOGIC
WRITE
LOCKOUT
START CYCLE
CK
DIN
R/W
LOAD
INC
SDA
SCL
WP
VCC
DOUT
A2
A1
A0
I
2
C
is a registered trademark of Philips Electronics N.V.
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