PT8A2512 |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Simple Toaster Controller Features Description Operating voltage : 3.5~5.5V The PT8A2512 is a CMOS LSI chip designed for Few external components simple toaster. It provides low cost solution for toaster. No start to turn on Relay without oscillation. The chip is enclosed in a 4 pin TO-94. TO94-4 package Applications Toaster. Pin Assignment PT8A2512NE 1-RELAY 2-VCC 3-OSC 4-GND 1 2 3 4 TO-94 Fig 2 PT8A2512NE pin assignment Pin Description Name Pin No. Type Description RELAY 1 O Relay control output, high active VCC 2 - Power supply OSC 3 I/O GND 4 - Input/output of RC oscillator GND Block Diagram Power on VC C Re set GND O SC Frequen cy Di vi der System O scil l ator RELAY PT8A2512NE Fi g1 Functio n B lo ck Diag ra m 12-07-0006 PT0204-4 1 07/06/2012 PT8A2512 Simple Toaster Controller |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Maximum Rating Storage Temperature………………………………………… - 25oC to +85oC Supply Voltage to Ground Potential (Inputs & VCC only)……… - 0.5 to +5.5V Supply Voltage to Ground Potential (Outputs only) …………… - 0.5 to +5.5V DC Input Voltage ………………………………………………- 0.5V to +5.5V Output Current ………………………………………………………… 20mA Power Dissipation……………………………………………………… 500mW Note: Stresses greater than those listed under AXIMUM 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 conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. Recommended Operating Conditions Symbol Pin Description Min Typical Max Unit VCC VCC Supply voltage 3.5 4 5.5 V TA - Operation Temperature 0 25 85 C DC Electrical Characteristics (TA = 0 ~ 85ºC, unless otherwise noted) Symbol Description Test Conditions Min Typical Max Unit IOH Output source current V CC = 3.5V, VOH=2.0V -12 - - mA IOL Output sink current V CC = 3.5V, VOL=0.5V 0.5 - - mA FOSC Frequency of oscillator V CC = 4.0V Rosc=56K,Cosc=223 952 1024 1096 Hz AC Electrical Characteristics (TA = 0 ~ 85ºC, unless otherwise noted) Symbol Description Test Conditions Min Typical Max Unit ICC Current consumption V CC = 4.0V Rosc=56K,Cosc=223 - - 100 uA 12-07-0006 PT0204-4 2 07/06/2012 PT8A2512 Simple Toaster Controller |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Function Description System oscillator and Frequency divider It provides one-stop timer for Toaster after power on. In general, Fosc=1KHz, RELAY will shut down after 30s. Power on reset Used to reset internal logic Application Circuit CONTROL BOARD SLOT1 C2 2 20 UF/1 6 V R6 1K PO WE R1 R1 1 N40 0 4 R2 R4 SLOT2 2 40 VZ1 3 .9 V C1 4 7UF HEATER D1 R7 VCC R3 R5 1 N41 4 8 D2 L1 LEVER IC1 PT8 A2 5 12 NE 4 GND RELAY 3 OSC VCC 1 2 220V R9 Q1 S1 2K 8 05 0 CANCEL R8 C3 2 23 SW1 * VCC R1 0 2 50 K 12-07-0006 PT0204-4 3 07/06/2012 |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| PT8A2512 Simple Toaster Controller ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Mechanical Information TO94-4 PKG. DIMENSIONS(MM) SYMBOL MIN MAX A 1.40 1.80 A1 0.70 0.90 A2 0.50 0.70 b 0.36 0.50 b1 0.38 0.55 c 0.36 0.51 D 4.98 5.28 D1 3.78 4.08 E 3.45 3.75 e 1.27 BSC e1 L θ 3.71 3.91 14.90 15.30 45ºBSC Note: 1) Controlling dimensions in millimeters. Ordering Information Part Number PT8A2512NE Package Code N Package Lead free TO94-4 Note: E = Pb-free 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. 12-07-0006 PT0204-4 4 07/06/2012