Datasheet > DS1743

DS1743

更新时间： 2022-01-15 05:57:30

品牌	Logo	应用领域
达拉斯 - DALLAS		时钟
页数	文件大小	规格书
17页	250K
描述
Y2KC Nonvolatile Timekeeping RAM

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数据手册

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DS1743 数据手册

DS1743/DS1743P

Y2KC Nonvolatile Timekeeping RAM

www.dalsemi.com

FEATURES

PIN ASSIGNMENT

ꢀ

Integrated NV SRAM, real time clock, crystal, power-

fail control circuit and lithium energy source

A12

V_CC

ꢀ

Clock registers are accessed identical to the static

RAM. These registers are resident in the eight top

RAM locations.

Century byte register

Totally nonvolatile with over 10 years of operation in

the absence of power

BCD coded century, year, month, date, day, hours,

minutes, and seconds with automatic leap year

compensation valid up to the year 2100

Battery voltage level indicator flag

CE2

A11

ꢀ

A10

DQ7

DQ6

DQ5

DQ4

DQ3

DQ0

DQ1

DQ2

GND

ꢀ

Power-fail write protection allows for ±10% V_CC

power supply tolerance

28-Pin Encapsulated Package

(700-mil Extended)

ꢀ

Lithium energy source is electrically disconnected to

retain freshness until power is applied for the first time

DIP Module only

A12

A11

A10

–

Standard JEDEC bytewide 8k x 8 static RAM

pinout

RST

V_CC

ꢀ

PowerCap Module Board only

–

Surface mountable package for direct connection

to PowerCap containing battery and crystal

DQ7

DQ6

DQ5

DQ4

DQ3

DQ2

DQ1

DQ0

GND

–

Replaceable battery (PowerCap)

Power-On Reset Output

Pin for pin compatible with other densities of

DS174XP Timekeeping RAM

V_BATX2

X1 GND

34-Pin Powercap Module Board

(Uses DS9034PCX Powercap)

ORDERING INFORMATION

DS1743P-XXX (5V)

PIN DESCRIPTION

-70

70 ns access

100 ns access

A0-A12

- Address Input

-100

- Chip Enable

blank 28-pin DIP Module

CE2

- Chip Enable 2 (DIP

Module only)

- Output Enable

34-pin PowerCap Module

board*

- Write Enable

- Power Supply Input

- Ground

- Data Input/Output

- No Connection

- Power-On Reset Output

(PowerCap Module board only)

- Crystal Connection

- Battery Connection

*DS1743WP-XXX

(3.3V)

-120

-150

V_CC

120 ns access

150 ns access

GND

DQ0-DQ7

blank 28-pin DIP Module

34-pin PowerCap Module

board*

RST

*DS9034PCX (PowerCap) Required:

X1, X2

V_BAT

(must be ordered separately)

1 of 17

022301

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DS1743_V01	MAXIM	Y2K-Compliant, Nonvolatile Timekeeping RAMs	获取价格
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DS1743-100	MAXIM	Real Time Clock, Non-Volatile, 0 Timer(s), CMOS, EDIP MODULE-28	获取价格
DS1743-100+	MAXIM	Real Time Clock, Non-Volatile, 0 Timer(s), CMOS, ROHS COMPLIANT, EDIP MODULE-28	获取价格
DS1743-100IND	MAXIM	Real Time Clock, Non-Volatile, 0 Timer(s), CMOS, EDIP MODULE-28	获取价格
DS1743-100IND+	MAXIM	Real Time Clock, Non-Volatile, 0 Timer(s), CMOS, ROHS COMPLIANT, EDIP MODULE-28	获取价格