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MCP79400 Datasheet(PDF) 2 Page - Microchip Technology

Part # MCP79400
Description  I2C Real-Time Clock/Calendar with SRAM, Unique ID and Battery Switchover
PDF  42 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP79400 Datasheet(HTML) 2 Page - Microchip Technology

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MCP7940X
DS25009C-page 2
 2011 Microchip Technology Inc.
FIGURE 1-1:
TYPICAL OPERATING
CIRCUIT
FIGURE 1-2:
SCHEMATIC
X1
X2
VBAT
VSS
VCC
MFP
SCL
SDA
RTCC
SRAM
Time-Stamp/
Alarms
ID
I2C™
VBAT Switch
X1
X2
VBAT
VSS
VCC
MFP
SCL
SDA
SYSTEM VCC
C1
Note 1
R1
R2
CX1
CX2
X1
C2
R4
D1
BAT
Suggested Values:
C1
CX1, CX2
C2
R1
R2,3
R4
D1
BAT
X1
100nF
See Text
100pF
10K
2.2K
1K
Schottky
Backup Supply
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



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