Datasheet

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       
SLLS540B − JULY 2002 − REVISED NOVEMBER 2004
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
RECEIVER SECTION
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Note 4 and Figure 4)
PARAMETER TEST CONDITIONS MIN TYP
†
MAX UNIT
V
OH
High-level output voltage I
OH
= −1 mA V
CC
− 0.6 V V
CC
− 0.1 V V
V
OL
Low-level output voltage I
OL
= 1.6 mA 0.4 V
V
IT+
Positive-going input threshold voltage
V
CC
= 3.3 V 1.5 2.4
V
V
IT+
Positive-going input threshold voltage
V
CC
= 5 V
1.8 2.4
V
V
IT−
Negative-going input threshold voltage
V
CC
= 3.3 V 0.6 1.2
V
V
IT−
Negative-going input threshold voltage
V
CC
= 5 V
0.8 1.5
V
V
hys
Input hysteresis (V
IT+
− V
IT−
) 0.3 V
r
i
Input resistance V
I
= ±3 V to ±25 V 3 5 7 kW
†
All typical values are at V
CC
= 3.3 V or V
CC
= 5 V, and T
A
= 25°C.
NOTE 4: Test conditions are C1−C4 = 0.1 µF at V
CC
= 3.3 V ± 0.3 V; C1 = 0.047 µF, C2−C4 = 0.33 µF at V
CC
= 5 V ± 0.5 V.
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Note 4 and Figure 3)
PARAMETER TEST CONDITIONS MIN TYP
†
MAX UNIT
t
PLH
Propagation delay time, low- to high-level output
C
L
= 150 pF
300 ns
t
PHL
Propagation delay time, high- to low-level output
C
L
= 150 pF
300 ns
t
sk(p)
Pulse skew
‡
300 ns
†
All typical values are at V
CC
= 3.3 V or V
CC
= 5 V, and T
A
= 25°C.
‡
Pulse skew is defined as |t
PLH
− t
PHL
| of each channel of the same device.
NOTE 4: Test conditions are C1−C4 = 0.1 µF at V
CC
= 3.3 V ± 0.3 V; C1 = 0.047 µF, C2−C4 = 0.33 µF at V
CC
= 5 V ± 0.5 V.
PARAMETER MEASUREMENT INFORMATION
50 Ω
TEST CIRCUIT VOLTAGE WAVEFORMS
0 V
3 V
Output
Input
V
OL
V
OH
t
TLH
Generator
(see Note B)
R
L
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.
1.5 V 1.5 V
3 V
−3 V
3 V
−3 V
Figure 1. Driver Slew Rate