_______________________________________________________________________________________ 5
PIN NAME FUNCTION
1 LED2 Display Driver. Connect to an LED connected to V
DD
for displ ay of relative pack capacity.
2 LED1 Display Driver. Con nect to an LED connected to V
D
D
for display of relative pack capacity.
3 DV
SS
D isplay Ground. Ground connection for th e LED disp lay drivers. Connect to V
SS
.
4 V
DD
Power-Supply Input. Connect to the positive termi nal of the battery cell through a decoupling network.
5 OVD
1-Wire Bus Speed Control. Input logic level selects the speed of the 1-Wire bus. Logic 1 selects overdrive (OVD)
and Logic 0 selects standard (STD) timing. On a multidrop bus, all devices must operate at the same speed.
6 V
SS
Device Ground. Connect directly to the negative term ina l of the battery cell. Connect the sense resistor
between V
SS
and SNS.
7 DQ
Data Input/Output. 1-Wire data lin e, open-drain output driver. Connect this pin to the DATA terminal of the
battery pack. This pin has a weak internal pulldown (I
PD
) for sensing pack disconnection from host or charger.
8 VMA
Voltage Measurement Active. Output is driven high before the start of a voltage conversion and driven low at
the end of the conversion cycle .
9 SNS
Sen se Resis tor Connection. Connect to the negative terminal of the battery pack. Connect the se nse resistor
between V
SS
and SNS.
10 V
IN
Voltage Sense Input. The voltage of the battery cell is monitored through this input pin.
11 PIO
Programmable I/O Pin. Can be configured as input or output to monitor or control user-defined external
circuitry. Output driver is open drain. This pin has a weak internal pulldown (I
PD
). When configured as an input,
upon recognition of a rising edge, the fuel-gauge display is enabled.
12 LED5
D isplay Driver. Connect to an LED connected to V
DD
for display of relative pack capacity. Leave floating in
LED4 configuration.
13 LED4 Display Driver. Connect t o an LED connected to V
DD
for displ ay of relative pack capacity.
14 LED3 Display Driver. Connect t o an LED connected to V
DD
for displ ay of relative pack capacity.
Figure 1. Block Diagram
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