Datasheet

MCP7940N
DS20005010F-page 2  2010-2014 Microchip Technology Inc.
FIGURE 1-1: TYPICAL APPLICATION SCHEMATIC
FIGURE 1-2: BLOCK DIAGRAM
VCC VCCVCC
VBAT
C
X1
32.768 KHZ
C
X2
VBAT
X2
X1
SCL
SDA
MFP
V
SS
VCC
1
2
3
4
5
7
6
8
PIC
®
MCU
MCP7940N
32.768 kHz
I
2
C™ Interface
and Addressing
Control Logic
SRAM
Clock Divider
Digital Trimming
Square Wave
Output
Alarms
Output Logic
Seconds
Minutes
Hours
Day of Week
Date
Month
Year
Configuration
Oscillator
X1
X2
SCL
SDA
MFP
Power Control
and Switchover
V
CC
VBAT
Power-Fail
Time-Stamp
VSS