View ds2740 datasheet:

DS2740 High-Precision Coulomb Counter www.maxim-ic.com PIN CONFIGURATION FEATURES 15-Bit Bidirectional Current Measurement (DS2740) 1 8 VDD OVD 1.56 V LSB and ±51.2mV Dynamic 2 7 PIO DQ Range 3 6 SNS VSS 78 A LSB and ±2.56A Dynamic 4 5 IS2 IS1 Range with External 20m Sense MAX Resistor (RSNS) (DS2740U, DS2740BU) 156 A LSB and ±5.12A Dynamic Range with External 10m Sense Resistor (RSNS) See Table 1 for Ordering Information. 13-Bit Bidirectional Current Measurement See Table 2 for Detailed Pin Descriptions. (DS2740B) 6.25 V LSB and ±51.2mV Dynamic PIN DESCRIPTION Range OVD- 1-Wire Bus Speed Select 312 A LSB and ±2.56A Dynamic PIO - Programmable I/O Pin Range with External 20m Sense SNS - Sense Resistor Input Resistor (RSNS) IS2 - Current