Datasheet

TPS3123-xx
TPS3124-xx, TPS3125-xx
TPS3126-xx, TPS3128-xx
www.ti.com SLVS227E –AUGUST 1999– REVISED AUGUST 2011
TIMING REQUIREMENTS
at R
L
= 1 MΩ, C
L
= 50 pF, T
A
= +25°C.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
At V
DD
V
IH
= V
IT–
+ 0.2 V, V
IL
= V
IT –
–0.2 V 6
t
w
Pulse width At MR 1 μs
V
DD
≥ V
IT–
+ 0.2 V, V
IL
= 0.3 x V
DD
, V
IH
= 0.7 × V
DD
At WDI 0.1
SWITCHING CHARACTERISTICS
at R
L
= 1 MΩ, C
L
= 50 pF, T
A
= +25°C.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
DD
≥ V
IT–
+ 0.2 V,
t
tout
Watchdog time out 0.8 1.4 2.1 s
See timing diagram
V
DD
> V
IT–
+ 0.2 V,
t
d
Delay time 100 180 260 ms
See timing diagram
MR to RESET delay
t
PHL
Propagation delay time, high-to-low-level output 0.1
V
DD
≥ V
IT–
+ 0.2 V,
(TPS3123/5/6/8)
V
IL
= 0.2 × V
DD
, μs
MR to RESET delay
V
IH
= 0.8 × V
DD
t
PLH
Propagation delay time, low-to-high-level output 0.1
(TPS3125/6)
t
PHL
Propagation delay time, high-to-low-level output V
DD
to RESET delay 10
V
IL
= V
IT–
–0.2 V,
μs
V
DD
to RESET delay
V
IH
= V
IT–
+ 0.2 V
t
PLH
Propagation delay time, low-to-high-level output 10
(TPS3124/5/6)
Copyright © 1999–2011, Texas Instruments Incorporated 7