Document
Preliminary Information
New Features Repetitive Alarms & Temperature Compensation
2-Wire™ RTC Real Time Clock/Calendar/CPU Supervisor with EEPROM
FEATURES
• Real Time Clock/Calendar — Tracks time in Hours, Minutes, Seconds and Hundredths of a Second — 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 setting to ±30ppm • CPU Supervisor Functions — Power On Reset, Low Voltage Sense — Watchdog Timer (SW Selectable: 0.25s, 0.75s, 1.75s, off) • Battery Switch or Super Cap Input • 32K x 8 Bits of EEPROM — 128-Byte Page Write Mode — 8 modes of Block Lock™ Protection — Single Byte Write Capability
X1288
• 2-Wire™ Interface interoperable with I2C* — 400kHz data transfer rate • Frequency Output (SW Selectable: Off, 1Hz, 100Hz, or 32.768kHz) • Low Power CMOS — 1.25µA Operating Current (Typical) • Small Package Options — 16-Lead SOIC and 14-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
• High Reliability —Data Retention: 100 years —Endurance: 100,000 cycles per byte
BLOCK DIAGRAM
OSC Compensation X1 Timer Calendar Logic Battery Switch Circuitry
32.768kHz
X2
Oscillator
Frequency Divider
1Hz
Time Keeping Registers (SRAM)
VCC VBACK
PHZ/IRQ
Select Status Registers (SRAM) Mask
SCL SDA
Serial Interface Decoder
Control Decode Logic
Control/ Registers (EEPROM)
Alarm
Compare Alarm Regs (EEPROM) 256K EEPROM ARRAY
8
RESET
Watchdog Timer Low Voltage Reset
*I2C is a Trademark of Philips. REV 1.1.30 3/24/04
www.xicor.com
1 of 31
Preliminary Information
PIN DESCRIPTIONS
X1288
16-pin SOIC X1 X2 NC NC NC NC RESET VSS
1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9
14-pin TSSOP VCC VBACK PHZ/IRQ NC NC NC SCL SDA NC = No internal connection X1 X2 NC NC NC RESET VSS 1 2 3 4 5 6 7 14 13 12 11 10 9 8 VCC VBACK PHZ/IRQ NC NC SCL SDA
ORDERING INFORMATION VCC Range
4.5–5.5V
VTRIP Range
4.63V±112mV
Package
16L SOIC 14L TSSOP
Operating Temperature Range
0–70°C -40–85°C 0–70°C -40–85°C 0–70°C -40–85°C 0–70°C -40–85°C 0–70°C -40–85°C 0–70°C -40–85°C 0–70°C -40–85°C 0–70°C -40–85°C
Part Number
X1288S16-4.5A X1288S16I-4.5A X1288V14-4.5A X1288V14I-4.5A X1288S16 X1288S16I X1288V14 X1288V14I X1288S16-2.7A X1288S16I-2.7A X1288V14-2.7A X1288V14I-2.7A X1288S16-2.7 X1288S16I-2.7 X1288V14-2.7 X1288V14I-2.7
4.5–5.5V
4.38V±112mV
16L SOIC 14L TSSOP
2.7–5.5V
2.85V±100mV
16L SOIC 14L TSSOP
2.7–5.5V
2.65V±100mV
16L SOI.