74abt833 NXP Semiconductors, 74abt833 Datasheet - Page 8

• Manufacturer Part Number: 74abt833
• Description: Octal Transceiver With Parity Generator/checker 3-state
• Manufacturer: NXP Semiconductors

Philips Semiconductors
TYPICAL PROPAGATION DELAYS VERSUS LOAD FOR OPEN COLLECTOR OUTPUTS
TEST CIRCUIT AND WAVEFORM
2002 Dec 17
Octal transceiver with parity generator/checker
(3-State)
GENERATOR
DEFINITIONS
R
C
R
SWITCH POSITION
L
L
T
All other
PULSE
TEST
= Load resistor; see AC CHARACTERISTICS for value.
= Load capacitance includes jig and probe capacitance;
= Termination resistance should be equal to Z
t
t
PLZ
PZL
NOTE:
When using Open-Collector parts, the value of the pull–up resistor greatly affects the value of the t
500 to 100 will improve the t
that the total I
see AC CHARACTERISTICS for value.
pulse generators.
SWITCH
Test Circuit for 3-State Outputs
closed
closed
open
V
OL
IN
current through the resistor and the total I
R
T
18
16
14
12
10
8
6
4
2
0
0
D.U.T
PLH
V
CC
LOAD VALUES
over 300% with only a slight change in the t
OUTPUT
ERROR
All other
V
100
OUT
C
L
100
500
R
X
IL
OUT
’s of the receivers does not exceed the I
200
7.0V
V
R
R
V
of
CC
X
L
X
Load resistor ( )
PHL
V
300
X
. However, if the value of the pull-up resistor is changed, the user must make certain
8
FAMILY
74ABT
NEGATIVE
PULSE
POSITIVE
PULSE
PLH
90%
10%
400
. For example, changing the specified pull-up resistor value from
OL
Amplitude
maximum specification.
3.0V
V
V
M
Input Pulse Definition
M
10%
90%
INPUT PULSE REQUIREMENTS
500
t
t
THL
TLH
t
t
PHL
PLH
V
Rep. Rate
(t
(t
M
F
R
1MHz
)
)
= 1.5V
t
t
W
W
600
10%
90%
500ns
t
V
W
V
M
M
74ABT833
2.5ns
SA00241
90%
10%
t
R
t
t
TLH
THL
Product data
2.5ns
(t
(t
SA00242
0V
0V
AMP (V)
AMP (V)
R
F
t
)
F
)