Datasheet > DS12R885_07

DS12R885_07

更新时间： 2024-11-11 02:57:35

品牌	Logo	应用领域
美信 - MAXIM		/
页数	文件大小	规格书
23页	293K
描述
RTC with Constant-Voltage Trickle Charger

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DS12R885_07 数据手册

Rev 5; 2/07

RTC with Constant-Voltage Trickle Charger

5C/DS12R87

General Description

Features

♦ Trickle-Charge Capability for a Rechargeable

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

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

♦ End-of-Clock Update Cycle Flag

♦ 14 Bytes of Clock and Control Registers

♦ 114 Bytes of General-Purpose Battery-Backed NV

RAM with Clear Input

♦ Programmable Square-Wave Output

♦ Automatic Power-Fail Detect and Switch Circuitry

♦ +5.0V or +3.3V Operation

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.

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

TOP MARK*

DS12R885-5

DS12R885-33

24 SO

(300 mils)

DS12R885S-5

-40°C to +85°C

RESET

RCLR

24 SO

(300 mils)

DS12R885S-5+ -40°C to +85°C

R/W

DS12R885S-5/

-40°C to +85°C

T&R

24 SO

(300 mils)

DS83C520

DS12R885

DS12R885S-5+

-40°C to +85°C

T&R

24 SO

(300 mils)

AD(0–7)

IRQ

SQW

BACKUP

24 SO

(300 mils)

SUPER

CAP

DS12R885S-33 -40°C to +85°C

MOT

GND

+Denotes a lead-free/RoHS-compliant device.

T&R = Tape-and-reel.

*A “+” anywhere on the top mark indicates a lead-free device.

Ordering Information continued at end of data sheet.

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...23

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与DS12R885_07相关器件

型号	品牌	获取价格	描述	数据表
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
DS12R885-33	DALLAS	获取价格	RTC with Constant-Voltage Trickle Charger
DS12R885-5	DALLAS	获取价格	RTC with Constant-Voltage Trickle Charger
DS12R885-5	MAXIM	获取价格	RTC with Constant-Voltage Trickle Charger
DS12R885S-33	MAXIM	获取价格	RTC with Constant-Voltage Trickle Charger
DS12R885S-33/T&R	MAXIM	获取价格	Real Time Clock, Non-Volatile, 1 Timer(s), CMOS, PDSO24, 0.300 INCH, SOP-24
DS12R885S-33+	MAXIM	获取价格	RTCs with Constant-Voltage Trickle Charger
DS12R885S-33+T&R	MAXIM	获取价格	Real Time Clock, Non-Volatile, 1 Timer(s), CMOS, PDSO24, 0.300 INCH, ROHS COMPLIANT, SOP-2
DS12R885S-33+TR	MAXIM	获取价格	RTCs with Constant-Voltage Trickle Charger

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