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MCP795BXX Datasheet(PDF) 1 Page - Micro Analog systems |
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MCP795BXX Datasheet(HTML) 1 Page - Micro Analog systems |
1 / 54 page 2011 Microchip Technology Inc. Preliminary DS22280A-page 1 MCP795WXX/MCP795BXX Device Selection Table Timekeeping Features: • Real-Time Clock/Calendar: - Hours, Minutes, Seconds, Hundredth of Seconds, Day of Week, Month, Year, Leap Year • Crystal Oscillator requires External 32,768 kHz Tuning Fork Crystal and Load Capacitors. • Clock Out Function: - 1Hz, 4.096 kHz, 8.192 kHz, 32.768 kHz • 32 kHz Boot-up Clock at Power-up (MCP795BXX) • 2 Programmable Alarms – Supports IRQ or WDO • Programmable open drain output – Alarm or Interrupt • On-Chip Digital Trimming/Calibration: - +/- 255 PPM range in 1 PPM steps • Power-Fail Time-Stamp @ Battery Switchover: - Logs time when VCC fails and VCC is restored Low-Power Features: • Wide Operating Voltage: -VCC: 1.8V to 5.5V -VBAT: 1.3V to 5.5V • Low Operating Current: -VCC Standby Current < 1uA @ 3V -VBAT Timekeeping Current: <700nA @ 1.8V • Automatic Battery Switchover from VCC to VBAT: - Backup power for timekeeping and SRAM retention User Memory: • 64-Byte Battery-Backed SRAM • 2 Kbit and 1 Kbit EEPROM Memory: - Software block write-protect (¼, ½, or entire array) - Write Page mode (up to 8 bytes) - Endurance: 1M erase/write cycles • 128-Bit Unique ID in Protected Area of EEPROM: - Available blank or preprogrammed - EUI-48™ or EUI-64™ MAC address - Unlock sequence for user programming Enhanced Features: • SPI Clock Speed up to 10 MHz • Programmable Watchdog Timer: - Dedicated watchdog output pin - Dual retrigger using SPI bus or EVHS digital input • Dual Configurable Event Detect Inputs: - High-Speed Digital Event Detect (EVHS) with pulse count for 1st, 4th,16th or 32nd event - Low-Speed Event Detect (EVLS) with programmable debounce delays of 31 msec and 500 msec - Edge triggered (rising or falling) - Operates from VCC or VBAT • Operating Temperature Ranges: - Industrial (I Temp): -40°C to +85°C. • Packages include 14-Lead SOIC and TSSOP Part Number 32 kHz Boot-up SRAM (Bytes) EEPROM (Kbits) Unique ID MCP795W20 No 64 2 Blank MCP795W10 No 64 1 Blank MCP795W21 No 64 2 EUI-48™ MCP795W11 No 64 1 EUI-48™ MCP795W22 No 64 2 EUI-64™ MCP795W12 No 64 1 EUI-64™ MCP795B20 Yes 64 2 Blank MCP795B10 Yes 64 1 Blank MCP795B21 Yes 64 2 EUI-48™ MCP795B11 Yes 64 1 EUI-48™ MCP795B22 Yes 64 2 EUI-64™ MCP795B12 Yes 64 1 EUI-64™ Note: Watchdog Timer and Event Detects in all devices. X1 X2 VBAT WDO Vcc CLKOUT/BOOT EVHS EVLS 1 2 3 4 14 13 12 11 SOIC/TSSOP IRQ CS VSS SCK SI SO 5 6 7 10 9 8 Note: MCP795XXX is used in this document as a generic part number for the MCP795WXX, MCP795BXX devices. SPI Real-Time Clock Calendar with Enhanced Features and Battery Switchover |
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