MCP79401T-I/MS Microchip Technology, MCP79401T-I/MS Datasheet - Page 15

• Manufacturer Part Number: MCP79401T-I/MS
• Description: Real Time Clock I2C GP RTCC 64B SRAM EUI-48
• Manufacturer: Microchip Technology
• Series: -r
• Type: Clock/Calendarr

Specifications of MCP79401T-I/MS

• Features: Alarm, Leap Year, SRAM, 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

4.2.6
The MCP7940X family of RTCC devices feature a
power-fail time-stamp feature. This feature will save
the time at which V
use this feature, a V
the oscillator must also be running.
There are two separate sets of registers that are used
to record this information:
• The first set located at 0x18h through 0x1Bh are
• The second set of registers, located at 0x1Ch
The power-fail time-stamp registers are cleared when
the V
 2011 Microchip Technology Inc.
loaded at the time when V
operates on the V
bit 4) bit is also set at this time.
through 0x1Fh, are loaded at the time when V
is restored and the RTCC switches to V
BAT
bit is cleared in software.
POWER-FAIL TIME-STAMP
BAT
CC
BAT
. The V
crosses the V
supply must be present and
CC
BAT
fails and the RTCC
(register 0x03h
TRIP
CC
voltage. To
.
CC
MCP7940X
DS25009A-page 15