74F521 Philips, 74F521 Datasheet - Page 5

• Manufacturer Part Number: 74F521
• Description: 8-bit identity comparator
• Manufacturer: Philips

Philips Semiconductors
AC ELECTRICAL CHARACTERISTICS
AC WAVEFORMS
For all waveforms, V
TEST CIRCUIT AND WAVEFORMS
May 15, 1990
SYMBOL
t
t
t
t
PLH
PHL
PLH
PHL
8-bit identity comparator
DEFINITIONS:
R
C
R
An, Bn
T
L
L
Q
GENERATOR
A=B
= Load resistor;
= Load capacitance includes jig and probe capacitance;
= Termination resistance should be equal to Z
PULSE
see AC ELECTRICAL CHARACTERISTICS for value.
see AC ELECTRICAL CHARACTERISTICS for value.
pulse generators.
Test Circuit for Totem-Pole Outputs
Waveform 1.
Propagation delay
An or Bn to Q
Propagation delay
I
A=B
to Q
M
V
IN
= 1.5V.
A=B
V
t
M
PHL
PARAMETER
R
A=B
T
V
For Inverting Outputs
M
D.U.T.
V
CC
V
M
V
OUT
t
PLH
C
V
L
M
R
L
OUT
SF00278
Waveform 1, 2
CONDITION
Waveform 2
of
TEST
NEGATIVE
PULSE
POSITIVE
PULSE
family
5
74F
90%
10%
C
MIN
3.5
3.0
3.0
3.5
L
amplitude
An, Bn
= 50pF, R
I
A=B
Q
T
V
3.0V
amb
A=B
CC
V
TYP
INPUT PULSE REQUIREMENTS
V
Waveform 2.
= +5.0V
8.0
8.0
5.0
6.5
M
= +25 C
90%
M
10%
L
t
t
TLH (
THL (
Input Pulse Definition
1.5V
V
= 500
M
MAX
t
t
9.5
9.0
6.5
7.0
r
f
)
)
rep. rate
LIMITS
1MHz
t
t
V
w
w
t
M
PLH
For Non-Inverting Outputs
C
T
V
V
L
amb
t
MIN
M
t
TLH (
CC
3.5
2.5
3.0
3.5
THL (
= 50pF, R
500ns
= +5.0V
= 0 C to +70 C
t
t
r
f
t
10%
90%
V
)
)
w
M
V
V
M
M
L
2.5ns
= 500
t
MAX
10.5
TLH
11.0
10%
7.5
8.0
t
PHL
Product specification
V
90%
10%
M
74F521
2.5ns
t
THL
SF00279
AMP (V)
0V
0V
AMP (V)
UNIT
SF00006
ns
ns