DS2745 查看數據表（PDF） - Maxim Integrated

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DS2745

Low-Cost I2C Battery Monitor

Maxim Integrated 

PIN DESCRIPTION

DS2745 Low-Cost I2C Battery Monitor

PIN

SYMBOL

FUNCTION

Serial Clock Input. 2-Wire clock line. Input only. Connect this pin to the CLOCK

1

SCL

terminal of the battery pack. Pin has an internal pulldown (IPD) for sensing

disconnection.

Serial Data Input/Output. 2-Wire data line. Open-drain output driver. Connect this pin

2

SDA

to the DATA terminal of the battery pack. Pin has an internal pulldown (IPD) for sensing

disconnection.

3

PIO

General Purpose Input/Output. Open-drain output driver with input sense. Connect

to a pull up resistor for bidirectional operation.

4

SNS

Sense Resistor Connection. Connect to the negative terminal of the battery pack.

Connect the sense resistor between VSS and SNS.

5

VSS

Device Ground. Connect to the negative terminal of the Li+ cell outside the cell

protection FETs. Connect the sense resistor between VSS and SNS.

6

CTG

Connect to Ground. Connect to the negative terminal of the Li+ cell outside the cell

protection FETs.

7

VIN

Voltage Sense Input. The voltage of the Li+ cell is monitored through this input pin.

8

VDD

Power-Supply Input. Connect to the positive terminal of the Li+ cell through a

decoupling network.

Figure 2. BLOCK DIAGRAM

5 of 15

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