Datasheet > DS1742

DS1742

更新时间： 2024-11-17 23:16:31

品牌	Logo	应用领域
达拉斯 - DALLAS		时钟
页数	文件大小	规格书
12页	165K
描述
Y2KC Nonvolatile Timekeeping RAM

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

DS1742 数据手册

DS1742

Y2KC Nonvolatile Timekeeping RAM

www.dalsemi.com

PIN ASSIGNMENT

FEATURES

ꢀ Integrated NV SRAM, real time clock,

crystal, power-fail control circuit and lithium

energy source

ꢀ Clock registers are accessed identical to the

static RAM. These registers are resident in

the eight top RAM locations

DQ0

DQ1

DQ2

GND

V_CC

A10

DQ7

DQ6

DQ5

DQ4

DQ3

ꢀ 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

PIN DESCRIPTION

A0-A10

- Address Inputs

- Chip Enable

- Output Enable

- Write Enable

- Power Supply Input

- Ground

ꢀ

Battery voltage level indicator flag

ꢀ

Power-fail write protection allows for ±10%

V_CCpower supply tolerance

ꢀ

Lithium energy source is electrically

disconnected to retain freshness until power is

applied for the first time

V_CC

GND

DQ0-DQ7

- Data Input/Outputs

ꢀ

Standard JEDEC bytewide 2k x 8 static RAM

pinout

Quartz accuracy ±1 minute a month @ 25°C,

factory calibrated

ORDERING INFORMATION

DS1742-XXX

(5V)

-70

70 ns access

-100 100 ns access

DS1742W-XXX

(3.3V)

-120 120 ns access

-150 150 ns access

DESCRIPTION

The DS1742 is a full function, year 2000-compliant (Y2KC), real-time clock/calendar (RTC) and 2k x 8

non-volatile static RAM. User access to all registers within the DS1742 is accomplished with a bytewide

interface as shown in Figure 1. The Real Time Clock (RTC) information and control bits reside in the

eight uppermost RAM locations. The RTC registers contain century, year, month, date, day, hours,

minutes, and seconds data in 24-hour BCD format. Corrections for the day of the month and leap year

are made automatically.

1 of 12

091800

12 3 4 5 6 7...12

中文翻译

下载PDF

与DS1742相关器件

型号	品牌	获取价格	描述	数据表
DS1742_V01	MAXIM	获取价格	Y2KC Nonvolatile Timekeeping RAM
DS1742-100	MAXIM	获取价格	Y2KC Nonvolatile Timekeeping RAMwww.
DS1742-100	DALLAS	获取价格	Y2KC Nonvolatile Timekeeping RAM
DS1742-100+	MAXIM	获取价格	Y2KC Nonvolatile Timekeeping RAMwww.
DS1742-100IND	MAXIM	获取价格	Y2KC Nonvolatile Timekeeping RAMwww.
DS1742-100IND+	MAXIM	获取价格	Y2KC Nonvolatile Timekeeping RAMwww.
DS1742-70	DALLAS	获取价格	Y2KC Nonvolatile Timekeeping RAM
DS1742-70	MAXIM	获取价格	Real Time Clock, Non-Volatile, 0 Timer(s), CMOS, PDIP24, 0.740 INCH, ENCAPSULATED, DIP-24
DS1742-70	ROCHESTER	获取价格	0 TIMER(S), REAL TIME CLOCK, PDIP24, 0.740 INCH, ENCAPSULATED, DIP-24
DS1742-70+	ROCHESTER	获取价格	0 TIMER(S), REAL TIME CLOCK, PDIP24, 0.740 INCH, ROHS COMPLIANT, ENCAPSULATED, DIP-24