Datasheet > DS1557

DS1557

更新时间： 2024-11-20 14:57:47

品牌	Logo	应用领域
亚德诺 - ADI		时钟
页数	文件大小	规格书
17页	249K
描述
4M非易失、Y2K兼容时钟RAM

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中文翻译

获取价格

数据手册

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DS1557 数据手册

19-5501; Rev 9/10

DS1557

4Meg, Nonvolatile, Y2K-Compliant

Timekeeping RAM

www.maxim-ic.com

FEATURES

PIN CONFIGURATION

. Integrated NV SRAM, Real-Time Clock

(RTC), Crystal, Power-Fail Control Circuit,

and Lithium Energy Source

TOP VIEW

A18

A17

A14

IRQ/FT

Maxim

DS1557

A15

. Clock Registers are Accessed Identically to

the Static RAM; These Registers Reside in the

16 Top RAM Locations

A16

RST

A13

A12

A11

A10

V_CC

. Century Byte Register (i.e., Y2K Compliant)

DQ7

DQ6

DQ5

DQ4

DQ3

DQ2

DQ1

DQ0

GND

. Totally Nonvolatile with Over 10 Years of

Operation in the Absence of Power

. Precision Power-On Reset

. Programmable Watchdog Timer and RTC

GND V_BAT

Alarm

PowerCap Module Board

(Uses DS9034PCX PowerCap)

. BCD-Coded Year, Month, Date, Day, Hours,

Minutes, and Seconds with Automatic Leap

Year Compensation Valid Up to the Year

2100

PIN DESCRIPTION

A0–A18

DQ0–DQ7

IRQ/FT

- Address Input

- Data Input/Outputs

- Interrupt, Frequency Test

Output (Open Drain)

- Power-On Reset Output

(Open Drain)

- 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

RST

. Lithium Energy Source is Electrically

Disconnected to Retain Freshness Until Power

is Applied for the First Time

V_CC

GND

X1, X2

V_BAT

. Also Available in Industrial Temperature

Range: -40°C to +85°C

- Crystal Connection

- Battery Connection

Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device

may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata.

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与DS1557相关器件

型号	品牌	获取价格	描述	数据表
DS1557P	DALLAS	获取价格	Real Time Clock, CMOS, POWERCAP MODULE-34
DS1557P/YP/WP	MAXIM	获取价格	PowerCap with Crystal
DS1557P-100	DALLAS	获取价格	4MEG NV Y2KC Timekeeping RAM
DS1557P-70	DALLAS	获取价格	4MEG NV Y2KC Timekeeping RAM
DS1557P-70	ROCHESTER	获取价格	0 TIMER(S), REAL TIME CLOCK, DMA34, POWERCAP MODULE-34
DS1557P-70+	MAXIM	获取价格	Real Time Clock, Non-Volatile, CMOS, ROHS COMPLIANT, POWERCAP MODULE-34
DS1557P-70IND	ROCHESTER	获取价格	REAL TIME CLOCK, DMA34, POWERCAP MODULE-34
DS1557P-70IND	MAXIM	获取价格	Real Time Clock, Non-Volatile, CMOS, POWERCAP MODULE-34
DS1557WP	MAXIM	获取价格	Real Time Clock, CMOS, POWERCAP MODULE-34
DS1557WP-120	ROCHESTER	获取价格	0 TIMER(S), REAL TIME CLOCK, DMA34, POWERCAP MODULE-34