PT8A2511 Toaster Controller Features Description The PT8A2511 is a CMOS LSI chip designed for Defrost mode for frozen bread toaster. Besides normal heating, it also provides defrost Reheat mode and reheat work modes. It provides low cost solution for Operating voltage: 3.5~5.5V toaster. Few external components DIP-8 and SOIC-8 package Applications Toaster Pin Configuration 8 GND DEFROST 1 2 7 CX REHEAT 3 6 RELAY OSC Vcc RX 4 5 DIP-8 and SOIC-8 (Top View) Top view Pin Description Name Pin No. Type Description As input, requires a negative pulse to activeDefros function. As output, DEFROST 1 I/O gives aDefros function indicator As input, requires a negative pulse to activeRehea function. As output, gives REHEAT 2 I/O aRehea function indicator RELAY 3 O RELAY drive output. High active. Vcc 4 - Power supply RX 5 O Shorts to VCC once an active negative pulse appears at Reheat OSC 6 I/O Oscillator input/output, oscillator s Frequency of 1024Hz with an external R1,C1 CX 7 O Shorts to GND once an active negative pulse appears at Defrost GND 8 - Power Ground 12-07-0006 PT0146-5 07/06/2011 1 PT8A2511P PT8A2511PEPT8A2511 Toaster Controller Block Diagram V CC Controller DEFROST RX REHEAT CX Power On Reset system Frequency RELAY oscillator divider OSC 12-07-0006 PT0146-5 07/06/2011 2