74F579 Philips, 74F579 Datasheet - Page 10

• Manufacturer Part Number: 74F579
• Description: 8-bit bidirectional binary counter 3-State
• Manufacturer: Philips

Philips Semiconductors
TEST CIRCUIT AND WAVEFORMS
1992 May 04
8-bit bidirectional binary counter (3-State)
SWITCH POSITION
GENERATOR
DEFINITIONS:
R
C
R
TEST
t
t
All other
T
L
L
PLZ
PZL
PULSE
= Load resistor;
= Load capacitance includes jig and probe capacitance;
= Termination resistance should be equal to Z
see AC electrical characteristics for value.
see AC electrical characteristics for value.
pulse generators.
Test Circuit for 3-State Outputs
V
IN
SWITCH
closed
closed
open
R
T
D.U.T.
V
CC
V
OUT
C
L
R
R
L
L
OUT
of
7.0V
NEGATIVE
PULSE
POSITIVE
PULSE
10
family
74F
90%
10%
amplitude
3.0V
V
INPUT PULSE REQUIREMENTS
V
M
90%
M
10%
t
t
TLH (
THL (
Input Pulse Definition
1.5V
V
M
t
t
r
f
)
)
rep. rate
1MHz
t
t
w
w
t
t
TLH (
THL (
500ns
t
t
r
f
t
10%
90%
)
)
w
V
V
M
M
2.5ns
t
TLH
Product specification
90%
10%
74F579
2.5ns
t
THL
SF00777
AMP (V)
0V
0V
AMP (V)