X1205 查看數據表（PDF） - Xicor -> Intersil

零件编号

产品描述 (功能)

生产厂家

X1205

Real Time Clock/Calendar

Xicor -> Intersil 

Preliminary Information

New Features

Repetitive Alarms &

Temperature Compensation

X1205

Real Time Clock/Calendar

2-Wire™ RTC

FEATURES

• Real Time Clock/Calendar

—Tracks time in Hours, Minutes, and Seconds

— Day of the Week, Day, Month, and Year

• 2 Polled Alarms (Non-volatile)

—Settable on the Second, Minute, Hour, Day of

the Week, Day, or Month

—Repeat Mode (periodic interrupts)

• Oscillator Compensation on chip

—Internal feedback resistor and compensation

capacitors

—64 position Digitally Controlled Trim Capacitor

—6 digital frequency adjustment settings to

±30ppm

• Battery Switch or Super Cap Input

• 2-Wire™ Interface interoperable with I2C*

—400kHz data transfer rate

• Low Power CMOS

—1.25µA Operating Current (Typical)

• Small Package Options

—8-Lead SOIC and 8-Lead TSSOP

APPLICATIONS

• Utility Meters

• HVAC Equipment

• Audio / Video Components

• Set Top Box / Television

• Modems

• Network Routers, Hubs, Switches, Bridges

• Cellular Infrastructure Equipment

• Fixed Broadband Wireless Equipment

• Pagers / PDA

• POS Equipment

• Test Meters / Fixtures

• Office Automation (Copiers, Fax)

• Home Appliances

• Computer Products

• Other Industrial / Medical / Automotive

DESCRIPTION

The X1205 device is a Real Time Clock with clock/

calendar, two polled alarms, oscillator compensation,

and battery backup switch.

The oscillator uses an external, low-cost 32.768kHz

crystal. All compensation and trim components are

integrated on the chip. This eliminates several external

discrete components and a trim capacitor, saving

board area and component cost.

The Real-Time Clock keeps track of time with separate

registers for Hours, Minutes, and Seconds. The

Calendar has separate registers for Date, Month, Year

and Day-of-week. The calendar is correct through

2099, with automatic leap year correction.

BLOCK DIAGRAM

OSC

Compensation

X1

32.768kHz

X2

Oscillator

Frequency 1Hz

Divider

Timer

Calendar

Logic

Time

Keeping

Registers

(SRAM)

SCL

SDA

Serial

Interface

Decoder

IRQ

Control

Decode

Logic

8

*I2C is a Trademark of Philips.

REV 1.0.9 8/29/02

Control

Registers

(EEPROM)

Status

Registers

(SRAM)

Interrupt Enable

Alarm

www.xicor.com

Alarm

Compare

Alarm Regs

(EEPROM)

Characteristics subject to change without notice. 1 of 22

Share Link: