MCP79402T-I/SN Microchip Technology, MCP79402T-I/SN Datasheet - Page 17

• Manufacturer Part Number: MCP79402T-I/SN
• Description: Real Time Clock I2C GP RTCC 64B SRAM EUI-64
• Manufacturer: Microchip Technology
• Series: -r
• Type: Clock/Calendarr

Specifications of MCP79402T-I/SN

• 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-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.2.6
The MCP7941X family of RTCC devices feature a
power-fail time-stamp feature. This feature will store
the time at which V
shown in
supply must be present and the oscillator must also be
running.
There are two separate sets of registers that are used
to record this information:
FIGURE 4-4:
 2011 Microchip Technology Inc.
V
V
V
CC
TRIP(min)
TRIP(max)
Figure
POWER-FAIL TIME-STAMP
Power-Down
Time-Stamp
4-4. To use this feature, a V
CC
crosses the V
POWER-FAIL GRAPH
TRIP
voltage and is
BAT
• The first set, located at 0x18h through 0x1Bh, is
• The second set of registers, located at 0x1Ch
The power-fail time-stamp registers are cleared when
the V
loaded at the time when V
and the RTCC operates on the V
(register 0x03h bit 4) bit is also set at this time.
through 0x1Fh, is loaded at the time when V
restored and the RTCC switches to V
BAT
bit is cleared in software.
MCP7940X
CC
falls below V
BAT
DS25009B-page 17
Time-Stamp
Power-Up
. The V
CC
.
TRIP
BAT
CC
is