74lvcz161284a STMicroelectronics, 74lvcz161284a Datasheet - Page 7

• Manufacturer Part Number: 74lvcz161284a
• Description: Low Voltage High Speed Ieee 1284 Transceiver With Error-free Power-up
• Manufacturer: STMicroelectronics

TEST CIRCUIT
C
R
R
WAVEFORM 1: ERROR-FREE CIRCUIT TIMING CHART (f=1MHz; 50% duty cycle)
t
t
(see waveform 2)
t
t
t
t
t
t
t
t
PHL
PLH
PHL
r
PLZ
PHZ
PZL
PZH
PLZ
PHZ
L
L
T
, t
= 50 pF or equivalent (includes jig and probe capacitance)
= R1 = 500Ω or equivalent
= Z
f
(A1-A8 to B1-B8, A9-A13 to Y9-Y13) (see waveform 2)
, t
(DIR to A1-A8) (see waveform 5)
(DIR to A1-A8) (see waveform 4)
(DIR to B1-B8) (see waveform 5)
(A1-A8 to B1-B8, A9-A13 to Y9-Y13, PLH
(A1-A8 to B1-B8, A9-A13 to Y9-Y13, PLH
(DIR to A1-A8) (see waveform 5)
(DIR to A1-A8) (see waveform 4)
(DIR to B1-B8) (see waveform 5)
OUT
PLH
of pulse generator (typically 50Ω)
(B1-B8 to A1-A8, C14-C17 to A14-A17, HLH
TEST
IN
IN
to PLH, HD to B1-B8, Y9-Y13, PLH)
to PLH) (see waveform 2)
IN
to HLH) (see waveform 3)
Open
Open
Open
Open
Open
Open
1.4V
4.4V
S1
6V
6V
74LVCZ161284A
GND
GND
GND
GND
GND
GND
GND
GND
V
V
S2
CC
CC
GND
GND
GND
GND
GND
GND
GND
GND
GND
V
S3
CC
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