MCP7940N Microchip Technology Inc., MCP7940N Datasheet - Page 6

• Manufacturer Part Number: MCP7940N
• Manufacturer: Microchip Technology Inc.

MCP7940N
2.0
The descriptions of the pins are listed in
FIGURE 2-1:
2.1
This is a bidirectional pin used to transfer addresses
and data into and out of the device. It is an open-drain
terminal, therefore, the SDA bus requires a pull-up
resistor to V
400 kHz). For normal data transfer SDA is allowed to
change only during SCL low. Changes during SCL high
are reserved for indicating the Start and Stop
conditions.
2.2
This input is used to synchronize the data transfer from
and to the device.
TABLE 2-1:
DS25010A-page 6
Vss
SDA
SCL
X1
X2
V
MFP
Vcc
Pin Name
BAT
PIN DESCRIPTIONS
Serial Data (SDA)
Serial Clock (SCL)
CC
V
SOIC/DFN/MSOP/TSSOP
Ground
Bidirectional Serial Data
Serial Clock
Xtal Input, External Oscillator Input
Xtal Output
Battery Backup Input (3V Typ)
Multi Function Pin
+1.8V to +5.5V Power Supply
Vss
BAT
X1
X2
(typically 10 k for 100 kHz, 2 k for
PIN DESCRIPTIONS
1
2
3
4
DEVICE PINOUTS
Pin Function
8
7
6
5
Vcc
MFP
SCL
SDA
Table
2-1.
 2011 Microchip Technology Inc.