Datasheet

MCP7940M
DS22292A-page 2 Preliminary  2012 Microchip Technology Inc.
FIGURE 1-1: TYPICAL OPERATING
CIRCUIT
FIGURE 1-2: SCHEMATIC
X1
X2
NC
VSS
MFP
SCL
SDA
RTCC
SRAM I
2
C™
Oscillator
VCC
Alarms and
CLKOUT
MCP7940M
X1
X2
NC
V
SS
VCC
MFP
SCL
SDA
SYSTEM VCC
C1
Note 1
R1 R2
CX1
CX2
X1
Suggested Values:
C1
CX1, CX2
R1
R2,3
X1
100nF
See Text
10K
2.2K
32.768 kHz Crystal
(See Text)
MFP
SCL
SDA
Note 1: A 100nF Capacitor should be placed as close to the VCC pin
on the device as possible.
R3