PT8A2514A New Toaster Controller Features Description Operating voltage: 3.5V~5.5V. The PT8A2514A is a CMOS LSI chip designed for toasters application. It will use different timer when Have Defrost, Reheat and Bagel function different function was active, and the time can be Relay output disable without external oscillator adjusted by external R/C. It has Reheat, Defrost, Bagel Adjustable timer: 30s~10mins function. Few external components The chip includes: Power on reset circuit, Logic Low cost 8-Pin DIP package control circuit, Output driver circuit, Key scan circuit, Applications timer circuit, Built-in internal oscillator and external Toaster Controller R/C oscillator circuit etc. It is enclosed in lead free DIP- 8 package. Pin Configuration PT8A2514A/BPE PT8A2515/6NE GND 1-RELAY 1 8 DEFROST 2-VCC CX 2 7 REHEAT 3-OSC 4-GND 3 6 BAGEL OSC 4 5 VCC RX 4 3 2 1 Pin Description Pin No. Pin Name I/O Description As input, requires a negative pulse to activeDefros function. 1 Defrost I/O As output, gives aDefros function indicator, active low. As input, requires a negative pulse to activeRehea function. 2 Reheat I/O As output, gives aRehea function indicator, active low. As input, requires a positive pulse to activeBage function. 3 Bagel I/O As output, gives aBage function indicator, active high. 4 VCC I Power supply 5 RX O Shorts to VCC when Reheat function is active. 6 OSC I/O Oscillator s Frequency of 8.192KHz with an external R1, C1. 7 CX O Shorts to GND when defrost function is active. 8 GND I Ground 12-07-0006 PT0271-3 07/06/12 1 PT8A2514A New Toaster Controller Maximum Ratings Note: Stresses greater than those listed under MAXIMUM o o Storage Temperature..- 40 C to +125 C RATINGS may cause permanent damage to the Supply Voltage to Ground Potential (Inputs & V only)- 0.5 to V +0.5V CC CC device. This is a stress rating only and functional Supply Voltage to Ground Potential (Outputs & D/O only) - 0.5 to V +0.5V CC operation of the device at these or any other condi- DC Input Voltage - 0.5V to V +0.5V CC tions above those indicated in the operational sec- DC Output Current 20mA tions of this specification is not implied. Exposure Power Dissipation 500mW to absolute maximum rating conditions for extended periods may affect reliability. Recommended Operation Conditions Sym Description Min Typ Max Unit 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 0 25 85 C A DC Electrical Characteristics (Unless otherwise noted, V = 5V, T = 0 ~ 85C) CC A Symbol Parameter Test Condition Min Typ Max Unit V Input L Voltage (Defrost, Reheat) - - - 2.5 V IL V Input H Voltage (Bagel) - 2.5 -- - V IH V =4.5V, Input key OH I Output Source Current (Defrost, Reheat) -5 -- -40 uA OH1 scan I Output Source Current (Defrost, Reheat) V =4.5V, Drive load -10 - - mA OH2 OH I Output Source Current (Bagel) V =4.5V -10 - - mA OH3 OH I Output Source Current (RX) V =4.5V -1.5 - - mA OH5 OH I Output Sink Current(Defrost, Reheat) V =0.5V 4 - - mA OL1 OL I Output Sink Current(Bagel) V =0.5V 10 -- 100 uA OL2 OL I Output Sink Current(CX) V =0.5V 4.0 - - mA OL3 OL I Input high leakage current(CX,RX) V =5V - - -1 A IH IH I Input low leakage current(CX,RX) V =0V - - 1 A IL IL 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 Fig1 Test circuit 12-07-0006 PT0271-3 07/06/12 2