NM34C02EMT8X

更新时间： 2024-02-20 22:17:50

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		/
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中文翻译

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数据手册

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NM34C02EMT8X 数据手册

March 1999

NM34C02

2K-Bit Standard 2-Wire Bus Interface

Designed with Permanent Write-Protection for First 128 Bytes for Serial Presence

Detect Application on Memory Modules

General Description

Features

The NM34C02 is 2048 bits of CMOS non-volatile electrically

erasable memory. It is designed to support Serial Presence

Detect circuitry in memory modules. This communications proto-

col uses CLOCK (SCL) and DATA I/O (SDA) lines to synchro-

nously clock data between the master (for example a micropro-

cessor) and the slave EEPROM device(s).

■ Extended Operating Voltage: 2.7V-5.5V

■ Write-Protection for first 128 bytes

■ 200 µA active current typical

– 10 µA standby current typical

– 1.0 µA standby current typical (L)

– 0.1 µA standby current typical (LZ)

The contents of the non-volatile memory allows the CPU to

determine the capacity of the module and the electrical character-

istics of the memory devices it contains. This will enable "plug and

play" capability as the module is read and PC main memory

resources utilized through the memory controller.

■ IIC compatible interface

– Provides bidirectional data transfer protocol

■ Sixteen byte page write mode

– Minimizes total write time per byte

The first 128 bytes of the memory of the NM34C02 can be

permanentlyWriteProtectedbywritingtothe"WRITEPROTECT"

under the section titled Addressing the WP Register.

■ Self timed write cycle

- Typical write cycle time of 6ms

■ Endurance: 1,000,000 data changes

■ Data retention greater than 40 years

The NM34C02 is available in a JEDEC standard TSSOP package

for low profile memory modules for systems requiring efficient

space utilization such as in a notebook computer. Two options are

available: L - Low Voltage and LZ - Low Power, allowing the part

to be used in systems where battery life is of primary importance.

■ Packages available: 8-pin TSSOP and 8-pin SO

Block Diagram

H.V. GENERATION

TIMING &CONTROL

START CYCLE

START

STOP

SDA

LOGIC

CONTROL

LOGIC

SLAVE ADDRESS

COMPARATOR

PROM

ARRAY

16 x 16 x 8

XDEC

SCL

LOAD

INC

WORD

ADDRESS

COUNTER

0/1/2/3

R/W

YDEC

Device Address Bits

Write Protect

OUT

DATA REGISTER

DS012821-1

NM34C02 Rev. D.2

www.fairchildsemi.com

12 3 4 5 6 7...12

中文翻译

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与NM34C02EMT8X相关器件

型号	品牌	获取价格	描述	数据表
NM34C02FEM8X	FAIRCHILD	获取价格	EEPROM, 256X8, Serial, CMOS, PDSO8, 0.150 INCH, PLASTIC, SOP-8
NM34C02FEMT8X	FAIRCHILD	获取价格	EEPROM, 256X8, Serial, CMOS, PDSO8, PLASTIC, TSSOP-8
NM34C02FLEM8	FAIRCHILD	获取价格	EEPROM, 256X8, Serial, CMOS, PDSO8, 0.150 INCH, PLASTIC, SOP-8
NM34C02FLEM8X	FAIRCHILD	获取价格	EEPROM, 256X8, Serial, CMOS, PDSO8, 0.150 INCH, PLASTIC, SOP-8
NM34C02FLEMT8	FAIRCHILD	获取价格	EEPROM, 256X8, Serial, CMOS, PDSO8, PLASTIC, TSSOP-8
NM34C02FLM8	FAIRCHILD	获取价格	EEPROM, 256X8, Serial, CMOS, PDSO8, 0.150 INCH, PLASTIC, SOP-8
NM34C02FLM8X	FAIRCHILD	获取价格	EEPROM, 256X8, Serial, CMOS, PDSO8, 0.150 INCH, PLASTIC, SOP-8
NM34C02FLMT8	FAIRCHILD	获取价格	EEPROM, 256X8, Serial, CMOS, PDSO8, PLASTIC, TSSOP-8
NM34C02FLMT8X	FAIRCHILD	获取价格	EEPROM, 256X8, Serial, CMOS, PDSO8, PLASTIC, TSSOP-8
NM34C02FLZEM8	FAIRCHILD	获取价格	EEPROM, 256X8, Serial, CMOS, PDSO8, 0.150 INCH, PLASTIC, SOP-8

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