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SN74LVCZ161284A
19-BIT IEEE STD 1284 TRANSLATION TRANSCEIVER
WITH ERROR-FREE POWER UP
SCES358B – SEPTEMBER 2001 – REVISED MAY 2005
PARAMETER MEASUREMENT INFORMATION
V
CC
CABLE
Input
(see Note B)
t
f1
Output
(see Note B)
Source Load
62 Ω
C
L
= 50 pF
(see Note A)
Output
(see Note B)
t
r1
1.9 V (V
CC
CABLE = 5 V"0.5 V)
0.4 V
95% (V
CC
CABLE = 5 V"0.5 V)
50% (V
CC
CABLE = 5 V"0.5 V)
2.7 V
0V
62 Ω
TP1
From
B or Y Output
Under Test
Sink Load
C
L
= 50 pF
(see Note A)
VOLTAGE WAVEFORMS MEASURED AT TP1
SLEW RATE WAVEFORMS (B8−B1 AND Y13−Y9)
SLEW RATE A-TO-B OR A-TO-Y LOAD (TOTEM POLE)
V
CC
CABLE
Input
(see Note C)
TP1
From
B or Y Output
500 Ω
Output
(see Note C)
2V
0.8 V
t
r
2V
0.8 V
t
f
1.4 V
1.4 V
2.7 V
0V
V
OH
V
OL
C
L
= 50 pF
(see Note A)
VOLTAGE WAVEFORMS MEASURED AT TP1, B SIDE
A-TO-B LOAD OR A-TO-Y LOAD (OPEN DRAIN)
NOTES: A. C
L
includes probe and jig capacitance.
B. When V
CC
CABLE is 3.3 V
"
0.3 V, slew rate is measured between 0.4 V and 0.9 V for the rising edge and between 2.4 V and
1.9 V for the falling edge. When V
CC
CABLE is 5 V
"
0.5 V, slew rate is measured between 0.4 V and 1.9 V for the rising edge and
between 95% V
CC
CABLE and 50% V
CC
CABLE for the falling edge.
t
slew
fall
+
V
CC
95%
*
50%
t
f1
C.
D.
E.
F.
G.
t
slew
rise
+
1.9 V – 0.4 V
t
r1
Input rise (t
r
) and fall (t
f
) times are 3 ns. Rise and fall times (open drain) are <120 ns.
The outputs are measured one at a time, with one transition per measurement.
t
PLZ
and t
PHZ
are the same as t
dis
.
t
PZL
and t
PZH
are the same as t
en
.
t
PLH
and t
PHL
are the same as t
pd
.
Figure 2. Load Circuits and Voltage Waveforms
7
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