SX8122ISTRT Semtech, SX8122ISTRT Datasheet - Page 8

• Manufacturer Part Number: SX8122ISTRT
• Description: IC PWR MGMT SINGLE CELL 8-SOIC
• Manufacturer: Semtech

Specifications of SX8122ISTRT

• Applications: General Purpose
• Current - Supply: 80µA
• Voltage - Supply: 0.9 V ~ 2 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: SX8122ISTR

ACS - Revision 2.2
© Semtech Corp.
4.3
4.4
ADVANCED COMMUNICATIONS & SENSING
Active modes
The circuit has 4 modes of operation when on:
1. Force Charge: pin CHARGE is connected to pin VDD, pin DISCHARGE is in open drain.
2. Continue Charge: pin CHARGE is connected to pin VDD, pin DISCHARGE is in open drain.
3. Force Discharge: pin DISCHARGE is connected to pin VSS, pin CHARGE is in open source.
4. Continue Discharge: pin DISCHARGE is connected to pin VSS, pin CHARGE is in open source.
When TRIGGER voltage is below 1/3 of VDD, then the circuit is in Force Charge mode (1) .
When TRIGGER voltage is above 2/3 of VDD, then the circuit is in Force Discharge mode (3).
When TRIGGER voltage is between 1/3 of VDD and 2/3 of VDD, the circuit goes into mode 2 or 4 depending
on which mode it was previousely.
The acquisition cycle is continuous and has a cycle frequency of ~5 kHz.
NiMH pin
Pin NIMH goes high when VDD is below the NIMH threshold of 1.41V and low when VDD is above the same
threshold.
A 30mV hysteresis allow to remove NiMH pin oscillation when the VDD voltage is near the threshold.
The supply voltage on VDD pin is checked at a 1Hz rate, so the NiMH pin can switch with a delay of 1 seconds
max.
August 2010
Page 8
www.semtech.com/products/
1V Motor/LED timer
SX8122
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