MCP79412T-I/MS Microchip Technology, MCP79412T-I/MS Datasheet - Page 33

• Manufacturer Part Number: MCP79412T-I/MS
• Description: Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-64
• Manufacturer: Microchip Technology
• Series: -r
• Type: Clock/Calendarr

Specifications of MCP79412T-I/MS

• Function: Clock/Calendar
• Rtc Memory Size: 64 Byte
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Rtc Bus Interface: I2C
• Supply Current: 1 uA
• Features: Alarm, Leap Year, NVSRAM, Square Wave Output, Unique ID
• Memory Size: 64B
• Time Format: HH:MM:SS (12/24 hr)
• Date Format: YY-MM-DD-dd
• Interface: I²C
• Voltage - Supply: 1.8 V ~ 5.5 V
• Voltage - Supply, Battery: 1.3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

APPENDIX A:
Revision A (10/2010)
Original release of this document.
Revision B (03/2011)
Minor typographical edits;
Added Appendix B: Device Errata
Revision C (07/2011)
Updated Section 4.2.6, Crystal Specs; Revised Figure
4-4.
 2010-2011 Microchip Technology Inc.
REVISION HISTORY
APPENDIX B:
Devices with silicon revision prior to A4 (date code prior
to 11/10) have an errata where the AM/PM bit (Bit 5 in
register 02h) may be flipped if the oscillator is stopped.
This is coincident with the OSCON bit getting cleared.
This can occur due to the following conditions:
• The oscillator is stopped on the application.
• The oscillator is stopped by clearing the ST bit (Bit
• The external CMOS source is stopped in
The work-around is to determine when the OSCON bit
is cleared and check in software for AM/PM bit corrup-
tion.
Devices with silicon revision A4 or later (date code after
11/09) do not have this issue.
7 in register 00h).
EXTOSC mode.
DEVICE ERRATA
MCP7941X
DS22266C-page 33