Datasheet

TEST CIRCUIT VOLTAGE WAVEFORMS
50 Ω
3 V
2.7 V
-2.7 V
INVALID
Output
Receiver
Input
t
invalid
Generator
(see Note B)
FORCEOFF
t
valid
ROUT
FORCEON
Auto-
powerdown
INVALID
DOUT
0 V
0 V
-3 V
DIN
C
L
= 30 pF
(see Note A)
V
CC
0 V
2.7 V
-2.7 V
0.3 V
-0.3 V
0 V
Valid RS-232 level, INVALID
high
Indeterminate
Indeterminate
If signal remains within this region
for more than 30 µs, INVALID
is low
†
Valid RS-232 level, INVALID high
≈V+
0 V
≈V-
V+
V
CC
t
en
V-
A.C
L
includes probe and jig capacitance.
B.The pulse generator has the following characteristics: PRR = 5 kbit/s, Z
O
= 50 Ω, 50% duty cycle, t
r
≤ 10 ns, t
f
≤ 10 ns.
50% V
CC
50% V
CC
2.7 V
-2.7 V
0.3 V
0.3 V
Supply
Voltages
†
Auto-powerdown disables drivers and reduces supply
current to 1 µA.
TRS3223-Q1
www.ti.com .......................................................................................................................................................................................... SLLS950 – SEPTEMBER 2008
PARAMETER MEASUREMENT INFORMATION (continued)
Figure 5. INVALID Propagation Delay Times and Supply Enabling Time
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Product Folder Link(s): TRS3223-Q1