The X1226 device is a Real Time Clock with clock/calendar, two polled alarms with integrated 512x8 EEPROM, 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.
Key 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
- 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
- Repetitive Alarms
- Temperature Compensation
- Pb-Free Plus Anneal Available (RoHS Compliant)
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
Datasheets| Title | Type | Updated | Size | Other Languages |
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| X1226 Datasheet | PDF | 19 Nov 2014 | 369 KB | |
Order Information| Part Number | Package Type | Weight(g) | Pins | MSL Rating | Peak Temp (°C) | RoHS Status |
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| X1226S8 | 8 Ld SOIC | 0.072 | 8 | | 240 | |
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| X1226S8I | 8 Ld SOIC | 0.072 | 8 | | 240 | |
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| X1226S8IT1 | 8 Ld SOIC T+R | 0.072 | 8 | | 240 | |
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| X1226S8IZ | 8 Ld SOIC | 0.072 | 8 | | 260 | RoHS |
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| X1226S8IZT1 | 8 Ld SOIC T+R | 0.072 | 8 | | 260 | RoHS |
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| X1226S8T1 | 8 Ld SOIC T+R | 0.072 | 8 | | 240 | |
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| X1226S8T2 | 8 Ld SOIC T+R | 0.072 | 8 | 3 | 240 | |
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| X1226S8Z | 8 Ld SOIC | 0.072 | 8 | | 260 | RoHS |
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| X1226S8ZT1 | 8 Ld SOIC T+R | 0.072 | 8 | | 260 | RoHS |
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| X1226V8 | 8 Ld TSSOP | 0.033 | 8 | | 240 | |
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| X1226V8I | 8 Ld TSSOP | 0.033 | 8 | | 240 | |
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| X1226V8IT1 | 8 Ld TSSOP T+R | 0.033 | 8 | | 240 | |
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| X1226V8IT2 | 8 Ld TSSOP T+R | 0.033 | 8 | 3 | 240 | |
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| X1226V8IZ | 8 Ld TSSOP | 0.033 | 8 | | 260 | RoHS |
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| X1226V8IZT1 | 8 Ld TSSOP T+R | 0.033 | 8 | | 260 | RoHS |
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| X1226V8T1 | 8 Ld TSSOP T+R | 0.033 | 8 | | 240 | |
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| X1226V8T2 | 8 Ld TSSOP T+R | 0.033 | 8 | 3 | 240 | |
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| X1226V8Z | 8 Ld TSSOP | 0.033 | 8 | | 260 | RoHS |
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| X1226V8ZT1 | 8 Ld TSSOP T+R | 0.033 | 8 | | 260 | RoHS |
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| X1226V8ZT2 | 8 Ld TSSOP T+R | 0.033 | 8 | 3 | 260 | RoHS |
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| X1227MBEVAL | | | | N/A | | |
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