PT8A2511 PERICOM | Alldatasheet
Document overview
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- PDF pages: 6
Technical content
Features
Defrost mode for frozen bread Reheat mode Operating voltage: 3.5~5.5V Few external components DIP-8 and SOIC-8 package
Applications
Toaster
Description
The PT8A2511 is a CMOS LSI chip designed for toaster. Besides normal heating, it also provid es defrost and reheat work modes. It provides low cost solution for toaster. Pin Configuration Top view 4 5 8DEFROST REHEAT RELAY GND CX OSC RXVcc PT8A2511P PT8A2511PE DIP-8 and SOIC-8 (Top View) Pin Description Name Pin No. Type Description DEFROST 1 I/O As input, requires a negative pulse to active "Defrost" function. As output, gives a "Defrost" function indicator REHEAT 2 I/O As input, requires a negative pulse to active "Reheat" function. As output, gives a "Reheat" 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 PT8A2511 Toaster Controller Block Diagram system oscillator VCC DEFROST REHEAT OSC Power On Reset Frequency divider Controller RX RELAY CX
12-07-0006 PT0146-5 07/06/2011 PT8A2511 Toaster Controller Maximum Ratings Recommended operation conditions Symbol Description Min Type Max Unit TA Operation Temperature 0 25 +85 C VCC Supply voltage 3.5 4.0 5.5 V VIH Input High Voltage 0.8VCC - 0 V VIL Input Low Voltage 0 - 0.35VCC V Electrical Characteristics (TA = 0 ~ 85º C, unless otherwise noted) Symbol Description Test Conditions Min Type Max Unit VIL Input High Voltage PIN: DEFROST, REHEAT VCC =4.0V - - 2.0 V IOH Output Source Current PIN: DEFROST, REHEAT VCC =3.5V VOH =3.0V -2.0 - - mA IOL Output Sink Current PIN: DEFROST, REHEAT VCC =3.5V VOL =0.5V 4 - - mA IOH Output Source Current PIN: RELAY VCC =3.5V VOH =2.0V -15 - - mA IOL Output Sink Current PIN: RELAY VCC =3.5V VOL =0.5V 0.5 - - mA IIH Input High Leakage Current - VCC =4.0V VIH =3.5V - - -1 µA IIL Input Low Leakage Current - VCC =4.0V VIL =0.5V - - 1 µA OSC Frequency of normal oscillator VCC =4.0V, R1=56kΩ, C1=223 952 1024 1096 Hz ICC Power supply Current VCC =4.0V, R1=56kΩ, C1=223, all output floating - - 100 µA Note: Stresses greater than those listed under MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other condi - tions above those indicated in the operational sec - tions of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.
12-07-0006 PT0146-5 07/06/2011 PT8A2511 Toaster Controller Application Circuit SW1DEFROST SW2REHEAT SW3 CANCEL 56k 223 R16 R3 2K DFROST REHEAT VCC 8050 1N4148 220UF/16V R10 220V SLOT1 SLOT2 CONTROL BOARD VZ1 3.9V R6 250k 1N4007C3 47UF TEMNTC HEATER LEVER R11 R13 R14 1K R12 R15 DFROST1 OSC 6RELAY3 VCC4 CX 7REHEAT2 RX 5 GND 8 PT8A2511P VCC R18 222 510 510 R17 240 Note: It's better to make C2 less than 563 and R7 larger than 30k
12-07-0006 PT0146-5 07/06/2011 PT8A2511 Toaster Controller Mechanical Information PE (DIP-8) Min Max A 3.710 4.310 A1 0.510 A2 3.200 3.600 B 0.380 0.570 c 0.204 0.360 D 9.000 9.400 E 6.200 6.600 E1 7.320 7.920 e L 3.000 3.600 E2 8.400 9.000 Symbol
1.524 BSC
2.540 BSC
Note: 1) Controlling dimensions in millimeters. 2) Ref: JEDEC MS -001D/BA
12-07-0006 PT0146-5 07/06/2011 PT8A2511 Toaster Controller WE (SOIC-8) Min Max A 1.350 1.750 A1 0.100 0.250 A2 1.350 1.550 b 0.330 0.510 c 0.170 0.250 D 4.700 5.100 E 3.800 4.000 E1 5.800 6.200 e L 0.400 1.270 θ 0° 8° Symbol Dimensions In Millimeters
1.27 BSC
Note: 1) Controlling dimensions in millimeters. 2) Ref: JEDEC MS -012E/AA
Ordering Information
Part No. Package Code Package PT8A2511PE P Lead free 8-pin DIP PT8A2511WE W Lead free and Green 8-pin SOIC Note: E = Pb-free or Pb-free and Green Adding X Suffix= Tape/Reel Pericom Semiconductor Corporation 1-800-435-2336 www.pericom.com Pericom Technology Incorporation reserves the right to make changes to its products or specifications at any time, without notice, in order to improve design or performance and to supply the best possible product. Pericom Technology does not assume any responsibility for use of any circuitry described other than the circuitry embodied in Pericom Technology product. The company makes no representations that circuitry described herein is free from patent infringement or other rights, of Pericom Technology Incorporation.