74hct688 NXP Semiconductors, 74hct688 Datasheet - Page 6

• Manufacturer Part Number: 74hct688
• Description: 8-bit Magnitude Comparator
• Manufacturer: NXP Semiconductors

Philips Semiconductors
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
Output capability: standard
I
Note to HCT types
The value of additional quiescent supply current ( I
To determine I
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
December 1990
CC
INPUT
P
Q
E
SYMBOL PARAMETER
t
t
t
PHL
PHL
THL
n
8-bit magnitude comparator
n
category: MSI
/ t
/ t
/ t
TLH
PLH
PLH
propagation delay
propagation delay
output transition time
r
P
E to P = Q
= t
n
UNIT LOAD COEFFICIENT
0.35
0.35
0.70
CC
, Q
f
= 6 ns; C
per input, multiply this value by the unit load coefficient shown in the table below.
n
to P = Q
L
= 50 pF
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
min.
20
18
7
typ.
25
CC
34
24
15
max. min. max.
) for a unit load of 1 is given in the family specifications.
T
6
74HCT
amb
40 to 85
( C)
43
30
19
min.
40 to 125
51
36
22
max.
.
UNIT
ns
ns
ns
74HC/HCT688
4.5
4.5
4.5
V
TEST CONDITIONS
(V)
Product specification
CC
WAVEFORMS
Fig.6
Fig.7
Figs 6 and 7