Datasheet

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SLLS349J − JUNE 1999 − REVISED MARCH 2004
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
AUTO-POWERDOWN PLUS SECTION
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figure 5)
PARAMETER TEST CONDITIONS MIN
TYP
†
MAX UNIT
V
T+(valid)
Receiver input threshold
for INVALID
high-level output voltage
FORCEON = GND,
FORCEOFF
= V
CC
2.7 V
V
T−(valid)
Receiver input threshold
for INVALID
high-level output voltage
FORCEON = GND,
FORCEOFF
= V
CC
−2.7 V
V
T(invalid)
Receiver input threshold
for INVALID
low-level output voltage
FORCEON = GND,
FORCEOFF
= V
CC
−0.3 0.3 V
V
OH
INVALID high-level output voltage
I
OH
= −1 mA, FORCEON = GND,
FORCEOFF
= V
CC
V
CC
−0.6 V
V
OL
INVALID low-level output voltage
I
OL
= 1.6 mA, FORCEON = GND,
FORCEOFF
= V
CC
0.4 V
†
All typical values are at V
CC
= 3.3 V or V
CC
= 5 V, and T
A
= 25°C.
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figure 5)
PARAMETER MIN TYP
†
MAX UNIT
t
valid
Propagation delay time, low- to high-level output 0.1 µs
t
invalid
Propagation delay time, high- to low-level output 50 µs
t
en
Supply enable time 25 µs
t
dis
Receiver or driver edge to auto-powerdown plus 15 30 60 s
†
All typical values are at V
CC
= 3.3 V or V
CC
= 5 V, and T
A
= 25°C.
PARAMETER MEASUREMENT INFORMATION
50 Ω
TEST CIRCUIT VOLTAGE WAVEFORMS
−3 V
−3 V
3 V
3 V
0 V
3 V
Output
Input
V
OL
V
OH
t
TLH
Generator
(see Note B)
R
L
3 V
FORCEOFF
RS-232
Output
t
THL
C
L
(see Note A)
SR(tr) +
6V
t
THL
or t
TLH
NOTES: A. C
L
includes probe and jig capacitance.
B. The pulse generator has the following characteristics: PRR = 250 kbit/s, Z
O
= 50 Ω, 50% duty cycle, t
r
≤ 10 ns, t
f
≤ 10 ns.
Figure 1. Driver Slew Rate