Datasheet

R1
R2
R3
Reference
Voltage
Transition
Detector
Watchdog
Logic and
Timer
Reset
Logic and
Timer
Device Power Supply
V
DD
MR
(1)
GND
WD
(2)
RESET
(3)
RESET
NOTES:
(1) TPS3123/5/6/8
(2) TPS3123/4/8
(3) TPS3124/5/6
V
DD
V
IT
<0.85 V
MR
RESET
t
d
t
d
t
d
t
t
t
A B C D E F
G
Output Undefined Output Undefined
TPS3123-xx
TPS3124-xx, TPS3125-xx
TPS3126-xx, TPS3128-xx
SLVS227E –AUGUST 1999– REVISED AUGUST 2011 www.ti.com
Figure 2. FUNCTIONAL BLOCK DIAGRAM
Figure 3. TIMING DIAGRAM TPS3123/5/6/8
4 Copyright © 1999–2011, Texas Instruments Incorporated