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with EEPROM. X1228 Datasheet

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with EEPROM. X1228 Datasheet






X1228 EEPROM. Datasheet pdf. Equivalent






X1228 EEPROM. Datasheet pdf. Equivalent


X1228

Part

X1228

Description

Real Time Clock/Calendar/CPU Supervisor with EEPROM



Feature


New Features Repetitive Alarms & Tempera ture Compensation 4K (512 x 8) X1228 2-Wire™ RTC Real Time Clock/Calenda r/CPU Supervisor with EEPROM 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, D ay of the Week, Day, or Month .
Manufacture

Xicor

Datasheet
Download X1228 Datasheet


Xicor X1228

X1228; — Repeat Mode (periodic interrupts) Oscillator Compensation on chip — I nternal feedback resistor and compensat ion capacitors — 64 position Digitall y Controlled Trim Capacitor — 6 digit al frequency adjustment settings to ±3 0ppm • CPU Supervisor Functions — P ower On Reset, Low Voltage Sense — Wa tchdog Timer (SW Selectable: 0.25s, 0.7 5s, 1.75s, off) • Battery Switch or.


Xicor X1228

Super Cap Input • 512 x 8 Bits of EEP ROM — 64-Byte Page Write Mode — 8 m odes of Block Lock™ Protection — Si ngle Byte Write Capability • High Rel iability — Data Retention: 100 years — Endurance: 100,000 cycles per byte • 2-Wire™ Interface interoperable w ith I2C* — 400kHz data transfer rate • Frequency Output (SW Selectable: Of f, 1Hz, 4096Hz, or 32.768kHz) • Low Power .

Part

X1228

Description

Real Time Clock/Calendar/CPU Supervisor with EEPROM



Feature


New Features Repetitive Alarms & Tempera ture Compensation 4K (512 x 8) X1228 2-Wire™ RTC Real Time Clock/Calenda r/CPU Supervisor with EEPROM 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, D ay of the Week, Day, or Month .
Manufacture

Xicor

Datasheet
Download X1228 Datasheet




 X1228
New Features
Repetitive Alarms &
Temperature Compensation
4K (512 x 8)
X1228
2-WireRTC
Real Time Clock/Calendar/CPU Supervisor with EEPROM
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
• 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
• 512 x 8 Bits of EEPROM
— 64-Byte Page Write Mode
— 8 modes of Block Lock™ Protection
— Single Byte Write Capability
• High Reliability
— Data Retention: 100 years
— Endurance: 100,000 cycles per byte
• 2-Wire™ Interface interoperable with I2C*
— 400kHz data transfer rate
• Frequency Output (SW Selectable: Off, 1Hz,
4096Hz, or 32.768kHz)
• Low Power CMOS
— 1.25µA Operating Current (Typical)
• Small Package Options
— 14-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
BLOCK DIAGRAM
32.768kHz
X1
X2
PHZ/IRQ
Select
SCL
SDA
Serial
Interface
Decoder
RESET
Control
Decode
Logic
8
OSC Compensation
Oscillator
Frequency 1Hz
Divider
Timer
Calendar
Logic
Time
Keeping
Registers
(SRAM)
Control/
Registers
(EEPROM)
Status
Registers
(SRAM)
Alarm
Watchdog
Timer
Low Voltage
Reset
Compare
Alarm Regs
(EEPROM)
4K
EEPROM
ARRAY
Battery
Switch
Circuitry
VCC
VBACK
*I2C is a Trademark of Philips.
REV 1.3 3/24/04
www.xicor.com
Characteristics subject to change without notice. 1 of 31




 X1228
X1228
PIN DESCRIPTIONS
14-Pin TSSOP/SOIC
X1
X2
NC
NC
NC
RESET
VSS
1
2
3
4
5
6
7
14 VCC
13 VBACK
12 PHZ/IRQ
11 NC
10 NC
9 SCL
8 SDA
NC = No internal connection
REV 1.3 3/24/04
www.xicor.com
Characteristics subject to change without notice. 2 of 31



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