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X1205V8ZT1

Description
Real Time Clock/Calendar
File Size846KB,22 Pages
ManufacturerIntersil ( Renesas )
Websitehttp://www.intersil.com/cda/home/
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X1205V8ZT1 Overview

Real Time Clock/Calendar

DATASHEET
X1205
2-Wire™ RTC Real Time Clock/Calendar
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 I
2
C*
—400kHz Data Transfer Rate
• Low Power CMOS
—1.25µA Operating Current (Typical)
• Small Package Options
—8 Ld SOIC and 8 Ld TSSOP
• Repetitive Alarms
• Temperature Compensation
• Pb-Free Plus Anneal Available (RoHS Compliant)
APPLICATIONS
• Utility Meters
• HVAC Equipment
• Audio/Video Components
BLOCK DIAGRAM
OSC
Compensation
32.768kHz
X1
X2
Oscillator
Frequency
Divider
1Hz
Timer
Calendar
Logic
Time
Keeping
Registers
(SRAM)
FN8097
Rev 3.00
May 2, 2006
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.
Mask
8
Interrupt Enable
Alarm
SCL
SDA
Serial
Interface
Decoder
Control
Decode
Logic
Control
Registers
(EEPROM)
Status
Registers
(SRAM)
Alarm
Compare
Alarm Regs
(EEPROM)
IRQ
FN8097 Rev 3.00
May 2, 2006
Page 1 of 22
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