點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
PS121
PS121
Voltage Detecting IC
General Description
PS121 is specially designed for +5V power good signal generating. Power good
signal notifies microprocessor whether the +5V supply voltage is ready, therefore it can
provide a stable and reliable power supply and computing environment.
Delay circuit is also built-in to provide delay time by adding an external capacitor.
Features
1. Power Good Logic to Check +5V
2. Adjustable delay time
3. 4-pin SIP package
Block Diagram
+5V INPUT
2
Id
23.6K
10K
PG
OUTPUT
1
10K
1.25 V
Vth_cd
4
3
GND
DELAY
CAPACITOR
Voltage Detecting IC
-1-
Version：A.017
SITI [ SILICON TOUCH TECHNOLOGY INC. ]
