Datasheet > DS12CR887-33

DS12CR887-33

更新时间： 2024-09-20 22:34:31

品牌	Logo	应用领域
达拉斯 - DALLAS		外围集成电路光电二极管时钟
页数	文件大小	规格书
22页	1091K
描述
RTC with Constant-Voltage Trickle Charger

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DS12CR887-33 数据手册

Rev 1; 4/04

RTC with Constant-Voltage Trickle Charger

General Description

Features

The DS12R885 is a functional drop-in replacement for

the DS12885 real-time clock (RTC). The device pro-

vides an RTC/calendar, one time-of-day alarm, three

maskable interrupts with a common interrupt output, a

programmable square wave, and 114 bytes of battery-

backed static RAM. The date at the end of the month is

automatically adjusted for months with fewer than 31

days, including correction for leap years. It also oper-

ates in either 24-hour or 12-hour format with an AM/PM

indicator. A precision temperature-compensated circuit

♦ Trickle-Charge Capability for a Rechargeable

Battery or Super Cap

♦ Selectable Intel or Motorola Bus Timing

♦ RTC Counts Seconds, Minutes, Hours, Day, Date,

Month, and Year with Leap-Year Compensation to

2100

♦ Interrupt Output with Three Independently

Maskable Interrupt Flags

♦ Time-of-Day Alarm is Once-per-Second to Once-

per-Day

♦ Periodic Rates from 122µs to 500ms

monitors the status of V . If a primary power failure is

detected, the device automatically switches to a back-

up supply. The V

pin supports a rechargeable

BACKUP

battery or a super cap and includes an integrated,

always enabled trickle charger. The DS12R885 is

accessed through a multiplexed byte-wide interface,

which supports both Intel and Motorola modes. The

DS12CR887 and DS12R887 integrate the DS12R885

die with a crystal and battery.

♦ End-of-Clock Update Cycle Flag

♦ 14 Bytes of Clock and Control Registers

♦ 114 Bytes of General-Purpose RAM with Clear Input

♦ Programmable Square-Wave Output

♦ Automatic Power-Fail Detect and Switch Circuitry

♦ +5.0V or +3.3V Operation

Applications

♦ Industrial Temperature Range

Embedded Systems

Utility Meters

♦ DS12CR887 Encapsulated DIP (EDIP) Module with

Integrated Battery and Crystal

♦ DS12R887 BGA Module Surface-Mountable

Package with Integrated Crystal and Rechargeable

Battery

Security Systems

Network Hubs, Bridges, and Routers

Typical Operating Circuit

Ordering Information

PIN-

PACKAGE

CRYSTAL

PART

TEMP RANGE

-40°C to +85°C

TOP MARK

24 SO

(300 mils)

DS12R885-5

DS12R885-33

DS12R885-5

RESET

24 SO

(300 mils)

DS12R885-33

DS12CR887-5

DS12CR887-33

RCLR

R/W

24 EDIP

(700 mils)

DS12CR887-5 -40°C to +85°C

DS12CR887-33 -40°C to +85°C

DS83C520

DS12R885

24 EDIP

(700 mils)

AD(0–7)

IRQ

SQW

BACKUP

DS12R887-5*

-40°C to +85°C 48 BGA

DS12R887-5

DS12R887-33

SUPER

CAP

MOT

DS12R887-33* -40°C to +85°C 48 BGA

GND

*Future product—contact factory for availability.

Pin Configurations appear 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...22

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与DS12CR887-33相关器件

型号	品牌	获取价格	描述	数据表
DS12CR887-33+	MAXIM	获取价格	RTCs with Constant-Voltage Trickle Charger
DS12CR887-5	DALLAS	获取价格	RTC with Constant-Voltage Trickle Charger
DS12CR887-5	MAXIM	获取价格	RTC with Constant-Voltage Trickle Charger
DS12CR887-5+	MAXIM	获取价格	RTCs with Constant-Voltage Trickle Charger
DS12R885	DALLAS	获取价格	RTC with Constant-Voltage Trickle Charger
DS12R885	MAXIM	获取价格	RTC with Constant-Voltage Trickle Charger
DS12R885	ADI	获取价格	带有恒压涓流充电器的RTC
DS12R885_07	MAXIM	获取价格	RTC with Constant-Voltage Trickle Charger
DS12R885_10	MAXIM	获取价格	RTCs with Constant-Voltage Trickle Charger
DS12R885-33	MAXIM	获取价格	RTC with Constant-Voltage Trickle Charger

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