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MCP79520

Battery-Backed SPI Real-Time Clock/Calendar

Status: In Production

Features:

  • VCC Min = 1.8V
  • Icc < 5 µA (Typical Standby Current)
  • VBAT Min = 1.3V
  • Ibat < 700nA Typical Timekeeping & SRAM Retention Current
  • VCC to VBAT (VCC Lost)
  • VBAT to VCC (VCC Restored)
  • IRQ (VCC or VBAT)
  • Clock Out frequencies: 32.768, 8.192 & 4.096 KHz and 1 Hz
  • Adjusts up to 22 seconds/day
  • Protect: None, 1/4, 1/2 or all of array
  • Factory standard MAC address programming or custom ID available
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Overview
Documents
Development Environment
Similar Devices
RoHS Information
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Device Overview

Summary

The MCP79520 SPI RTCC is highly integrated with memory and advanced features normally found in higher priced devices. By starting with a basic real-time clock, digital trimming was added for higher accuracy, a battery switchover for backup power, a timestamp to log power failures and three types of memory, which includes SRAM, EEPROM and a blank unique ID in a locked section of EEPROM. The ID is blank in this device, but can also be ordered with a 48-bit or 64-bit MAC Address.

Additional Features

    General purpose SPI RTCC with features that target low power, security & communications applications.

    • Low Power Operation
      • VCC Min = 1.8V
      • Icc < 5 µA (Typical Standby Current)
    • Low Backup Power
      • VBAT Min = 1.3V
      • Ibat < 700nA Typical Timekeeping & SRAM Retention Current
    • Automatic Battery Switchover with Timestamp
      • VCC to VBAT (VCC Lost)
      • VBAT to VCC (VCC Restored)
    • Dual configurable alarms with a 0.01 sec count on one alarm
      • IRQ (VCC or VBAT)
    • Clock Out frequencies: 32.768, 8.192 & 4.096 KHz and 1 Hz
    • Digital Trimming Range from -255 to + 255 ppm in 1 ppm steps
      • Adjusts up to 22 seconds/day
    • EEPROM has 8 Bytes/Page with Block Sector write protection
      • Protect: None, 1/4, 1/2 or all of array
    • Factory standard MAC address programming or custom ID available
Parametrics
Name
Value
Max Communications Speed
10 MHz
Pin Count
10
Minimum Clock Count (seconds)
0.01 sec
Battery-backed SRAM (Bytes)
64
EEPROM (Kbits)
2
Unique ID (bits)
128
Unique ID Programming
Blank
Temperature Range (C)
-40 to +85

Documents

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Errata


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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (grams)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
MCP79520-I/MS
0.023200
0.060000
10
MSOP
3x3mm
Matte Tin
e3
MCP79520-I/MSVAO
0.023200
0.060000
10
MSOP
3x3mm
Matte Tin
e3
MCP79520T-I/MS
0.023200
0.200000
10
MSOP
3x3mm
Matte Tin
e3
MCP79520T-I/MSVAO
0.023200
0.200000
10
MSOP
3x3mm
Matte Tin
e3
MCP79520T-I/MN
0.021000
0.228788
10
TDFN
3x3x0.8mm
Matte Tin
e3
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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