DS3045W-100

更新时间： 2024-11-23 23:13:39

品牌	Logo	应用领域
美信 - MAXIM		静态存储器时钟
页数	文件大小	规格书
18页	550K
描述
3.3V Single-Piece 1Mb Nonvolatile SRAM with Clock

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数据手册

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DS3045W-100 数据手册

Rev 0; 6/05

3.3V Single-Piece 1Mb Nonvolatile SRAM

with Clock

General Description

Features

The DS3045W consists of a static RAM, a nonvolatile

(NV) controller, a year 2000-compliant real-time clock

(RTC), and an internal rechargeable manganese lithium

(ML) battery. These components are encased in a sur-

face-mount module with a 256-ball BGA footprint.

♦ Single-Piece, Reflowable, 27mm x 27mm BGA

Package Footprint

♦ Internal Manganese Lithium Battery and Charger

♦ Integrated Real-Time Clock

Whenever V

is applied to the module, it recharges

the ML battery, powers the clock and SRAM from the

external power source, and allows the contents of the

♦ Unconditionally Write-Protects the Clock and

clock registers or SRAM to be modified. When V

SRAM when V

is Out-of-Tolerance

powered down or out-of-tolerance, the controller write-

protects the memory contents and powers the clock

and SRAM from the battery. The DS3045W also con-

tains a power-supply monitor output (RST), as well as a

user-programmable interrupt output (IRQ/FT).

♦ Automatically Switches to Battery Supply when

Power Failures Occur

♦ Reset Output can be Used as a CPU Supervisor

♦ Interrupt Output can be Used as a CPU Watchdog

Applications

Gaming

Timer

RAID Systems and Servers

POS Terminals

♦ Industrial Temperature Range (-40°C to +85°C)

♦ UL Recognized

Fire Alarms

PLCs

Industrial Controllers

Data-Acquisition Systems

Routers/Switches

Ordering Information

PART

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

SPEED

SUPPLY VOLTAGE

DS3045W-100

256-ball 27mm x 27mm BGA Module

100ns

3.3V 0.3V

Typical Operating Circuit

DS3045W

MICROPROCESSOR

128k x 8

NV SRAM

OR DSP

DATA

DQ0–7

8 BITS

AND RTC

17 BITS

ADDRESS

A0–16

INT

IRQ/FT

RST

Pin Configuration appears at end of data sheet.

______________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...18

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