74abth16821adl NXP Semiconductors, 74abth16821adl Datasheet - Page 7

• Manufacturer Part Number: 74abth16821adl
• Description: 20-bit Bus-interface D-type Flip-flop; Positive-edge Trigger 3-state
• Manufacturer: NXP Semiconductors

Philips Semiconductors
TEST CIRCUIT AND WAVEFORM
1998 Feb 27
20-bit bus-interface D-type flip-flop;
positive-edge trigger (3-State)
DEFINITIONS
R
C
R
GENERATOR
SWITCH POSITION
T
All other
L
L
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
see AC CHARACTERISTICS for value.
pulse generators.
Test Circuit for 3-State Outputs
SWITCH
closed
closed
open
V
IN
R
T
D.U.T.
V
CC
V
OUT
C
L
OUT
R
R
L
L
of
7.0V
7
74ABT/H16
FAMILY
NEGATIVE
PULSE
POSITIVE
PULSE
90%
10%
Amplitude
3.0V
V
V
M
Input Pulse Definition
10%
90%
M
INPUT PULSE REQUIREMENTS
t
t
THL
TLH
V
Rep. Rate
(t
(t
F
R
M
1MHz
)
)
= 1.5V
t
t
W
W
74ABTH16821A
10%
90%
500ns
74ABT16821A
t
V
W
V
M
M
Product specification
2.5ns
90%
10%
t
R
t
t
TLH
THL
2.5ns
(t
(t
SA00018
0V
0V
AMP (V)
AMP (V)
R
F
t
)
F
)