Datasheet

DS2782
5 of 28
PIN DESCRIPTION
PIN
TSSOP TDFN-EP
NAME
FUNCTION
1 1 N.C. Not Connected. Pin not connected internally, float or connect to VSS.
2 2, 3 VSS
Device Ground. Connect directly to the negative terminal of the battery
cell. Connect the sense resistor between VSS and SNS.
3 4 VIN
Voltage Sense Input. The voltage of the battery cell is monitored through
this input pin.
4 5 V
DD
Power-Supply Input. Connect to the positive terminal of the battery cell
through a decoupling network.
5 6 SDA
Serial Data Input/Output. 2-Wire data line. Open-drain output driver.
Connect this pin to the DATA terminal of the battery pack. Pin has an
internal pull-down (I
PD
) for sensing disconnection.
6 7 SCL
Serial Clock Input. 2-Wire clock line. Input only. Connect this pin to the
CLOCK terminal of the battery pack. Pin has an internal pull-down (I
PD
) for
sensing disconnection.
— 8 N.C.
No Connection
7 9 SNS
Sense Resistor Connection. Connect to the negative terminal of the
battery pack. Connect the sense resistor between VSS and SNS.
8 10 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
).
— EP EP Exposed Pad. Connect to VSS or leave floating.
Figure 2. Block Diagram
VPOR
SDA
2-Wire
Interface
BIAS/VREF Timebase
Temp
&
Voltage
ADC
Current ADC
15 bit + sign
Rate,
Temperature
Compensation
EEPROM
Status
&
Control
Accumulated
Current
EN
SNS VSS
VDD
SCL
PIO
VIN