Datasheet

TL7770-5, TL7770-12
DUAL POWER-SUPPLY SUPERVISORS
SLVS019F – OCTOBER 1987 – REVISED JULY 1999
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating conditions (unless otherwise noted)
supply supervisor section
PARAMETER
TEST
CONDITIONS
TL7770-5Y
TL7770-12Y
UNIT
CONDITIONS
MIN TYP
†
MAX
TL7770-5 (5-V sense, 1VSU) 4.46 4.64
V
IT
Undervoltage input threshold at VSU
TL7770-12 (12-V sense, 1VSU)
T
A
= MIN to MAX
10.68 11.12
V
V
IT
–
(negative-going)
TL7770-5, TL7770-12
(programmable sense, 2VSU)
T
A
=
MIN
to
MAX
1.47 1.53
V
TL7770-5 (5-V sense, 1VSU) 15
V
hys
Hysteresis at VSU
TL7770-12 (12-V sense, 1VSU)
T
A
= MIN to MAX
36
mV
V
h
ys
(V
IT+
– V
IT–
)
TL7770-5, TL7770-12
(programmable sense, 2VSU)
T
A
=
MIN
to
MAX
5
mV
V
T
Overvoltage threshold at VSO TL7770-5, TL7770-12 (VSO) T
A
= MIN to MAX 2.48 2.68 V
I
I
Input current VSO V
I
= 2.4 V 0.5 µA
†
Typical values are at V
CC
= 5 V, T
A
= 25°C.
total device
PARAMETER TEST CONDITIONS
TL7770-5Y
TL7770-12Y
UNIT
MIN TYP
†
MAX
V
res
‡
Power-up reset voltage V
CC
= VSU, V
OL
= 0.4 V, I
OL
= 1 mA 0.8 V
I
CC
Supply current
1VSU = 18 V, 2VSU = 2 V,
1RESIN
and 2RESIN at V
CC
,
1VSO and 2VSO at 0 V
T
A
= 25°C 5 mA
†
Typical values are at V
CC
= 5 V, T
A
= 25°C.
‡
This is the lowest voltage at which RESET
becomes active.
switching characteristics, V
CC
= 5 V, C
T
open, T
A
= 25°C
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
TEST
CONDITIONS
MIN TYP MAX UNIT
t
PLH
Propagation delay time, low-to-high-level output
RESIN
RESET 270 500 ns
t
PHL
Propagation delay time, high-to-low-level output
RESIN RESET
270 500 ns
t
r
Rise time
RESET
See Figures 1
75
ns
t
f
Fall time
RESET
g
and 3
150
ns
t
r
Rise time
RESET
75
ns
t
f
Fall time
RESET
50
ns
t
w(min)
Minimum effective
p
ulse duration
RESIN
See Figure 2a 150
ns
t
w
(
m
i
n
)
Minimum
effective
ulse
duration
VSU See Figure 2b 100
ns