PT8A2516 Simple Timer Features Description The PT8A2516 is a CMOS LSI chip designed for Operating voltage: 3.5V~5.5V. timer applications, the time can be adjusted by external Have Reset function R/C. It has reset function. Relay output disable without external oscillator The chip includes: Power on reset circuit, Logic Adjustable Timer: 20mins~16hrs control circuit, Output driver circuit, Key scan circuit, Quick test mode(QTM) timer circuit, Built-in internal oscillator and external R/C Few external components oscillator circuit etc. It is enclosed in lead free TO-94 and Low cost lead free TO94-4L and SOT23-5L package SOT23-5 package. Applications Timer Pin Configuration OSC 1 5 NC TO94-4L (Top View) PT8A2515 GND 2 SOT23-5L(Top View) SOT23-5 VCC 3 4 Relay Pin Description Pin No. Pin Name I/O Description TO94-4L SOT23-5L 1 4 Relay O Relay output, high active 2 3 VCC I Power supply Oscillator s Frequency of 8.192KHz with an external R1, C1. 3 1 OSC I/O As input, requires a negative pulse to active Reset function. 4 2 GND I Ground - 5 NC - Not connected 2014-04-0002 PT0273-4 04/09/2014 1 PT8A2516 Simple Timer Simple Timer Maximum Ratings Note: o o Storage Temperature..-40 C to +125 C Stresses greater than those listed under MAXIMUM Supply Voltage to Ground Potential (Inputs & V only)- 0.5 to V +0.5V CC CC RATINGS may cause permanent damage to the Supply Voltage to Ground Potential (Outputs & D/O only) - 0.5 to V +0.5V CC device. This is a stress rating only and functional DC Input Voltage - 0.5V to V +0.5V CC operation of the device at these or any other condi- DC Output Current 20mA tions above those indicated in the operational sec- Power Dissipation 500mW tions of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. Recommended Operation Conditions Description Min Typ Max Unit Sym V Supply voltage. 3.5 5.0 5.5 V CC V H Input Voltage 0.8 V - - V IH CC V L Input Voltage - - 0.35 V V IL CC T Operation temperature -40 25 85 C A DC Electrical Characteristics (Unless otherwise noted, V = 5V, T = -40 ~ 85C) CC A Symbol Parameter Test Condition Min Typ Max Unit I Output Source Current (Relay) V =4.5V -10 - - mA OH OH I Output Sink Current(Relay) V =0.5V 10 - 100 uA OL OL R1=47K C1=332, see OSC Frequency of normal oscillator 7808 8192 8576 Hz Fig 1 V =5V, R1=47 K, CC I Power supply current C1=332, all output - - 500 A CC floating. See Fig 1 IC C URRENT R1 1 METER RELAY 47K 2 VCC 3 OSC/RESET OSC C1 POWER 4 332 GND SUPPLY PT8A2515/6NE Fig1 Test circuit 2014-04-0002 PT0273-4 04/09/2014 2