PT8A2521 Datasheet, PDF (1/9 Pages) Pericom Semiconductor Corporation – Universal Timer Controller

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PT8A2521-23/31-33/41-43
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Universal Timer Controller
Features
 Auto-shut off output once time-out
 Button to ON/OFF/RESET timer
 Available timer with high precision same as AC
50/60Hz
 Build-in RC oscillator
 Drive external SCR
 Support 50/60Hz by part
 Quick Test Mode (QTM) for manufacturer
 Available timer of 15/30/45/60/90/120/240/480min
 Low cost lead free package: TO-92 or DIP-8 or
SOIC-8
Pin Configuration
PT8A2521/2/3A-H
PT8A2531/2/3A-H
TO92-3 (Top View)
Description
Universal timer is a mixed signal CMOS IC
designed for a fixed timer to drive external SCR to
implement safety power control. It is applied to
120V/240V and 50/60Hz AC power supply. It can
automatically shut-off load in order to prevent undesired
conditions from the system. Internal timer can present
several kinds of different time: 15mins, 30mins, 45mins,
1hr, 1.5hrs, 2hrs, 4hrs and 8hrs, which is decided by part
number.
Applications
 Universal Timer Controller
PT8A2541/2/3
DIP-8 or SOIC-8
(Top View)
TO92-3
Pin Description
PT8A2521/2/3A-H, PT8A2531/2/3A-H
Pin Name
Pin No
I/O
Pin Description
VCC
1
- Power supply
SCR
2
I/O SCR output and button input, high active
GND
3
- Ground
PT8A2541/2/3
Pin Name
TS2
TS1
TS0
GND
SCR
NC
ACSEL
VCC
Pin No.
1
2
3
4
5
6
7
8
I/O
Pin Description
I ^{Timer selection pins(TS2 TS1 TS0 from 000~111)}
I
000: 15m, 001: 30m, 010: 45m, 011: 60m,
100: 90m, 101: 120m,110: 240m,111: 480m
I
Default 011 by TS2 internal pull down, TS1&TS0 internal pull up.
- Ground.
I/O SCR output and button input, high active.
I/O No connection.
I
50/60Hz selection pin: default is 60Hz by internal pull down; connecting to VCC is
50Hz.
- Power supply.
2013-12-0013
PT0246-4 01/03/14
1