DS2745 Low-Cost I

PIN DESCRIPTION

PIN

SYMBOL

FUNCTION

1

SCL

Serial Clock Input.

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

disconnection.

2

SDA

Serial Data Input/Output.

2-Wire data line. Open-drain output driver. Connect this pin

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.

5

Device Ground.

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

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

Power-Supply Input.

Connect to the positive terminal of the Li+ cell through a

decoupling network.

Figure 2. BLOCK DIAGRAM

5 of 15