Philips Semiconductors
Product specification
4-bit magnitude comparator
74HC/HCT85
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
ICC category: MSI
AC CHARACTERISTICS FOR 74HC
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
Tamb (°C)
TEST CONDITIONS
74HC
SYMBOL PARAMETER
VCC
+25
−40 to +85 −40 to +125 UNIT
WAVEFORMS
(V)
min. typ. max. min. max. min. max.
tPHL/ tPLH propagation delay
An, Bn to QA>B or QA<B
63
23
18
195
39
33
245
49
42
295
59
50
ns
ns
ns
ns
ns
2.0 Fig.6
4.5
6.0
t
t
t
t
PHL/ tPLH propagation delay
58
21
17
175
35
30
220
44
37
265
53
45
2.0 Fig.6
4.5
6.0
An, Bn to QA=B
PHL/ tPLH propagation delay
IA<B, IA=B, IA>B to
50
18
14
140
28
24
175
35
30
210
42
36
2.0 Fig.6
4.5
6.0
QA<B, QA>B
PHL/ tPLH propagation delay
39
14
11
120
24
20
150
30
26
180
36
31
2.0 Fig.6
4.5
6.0
I
A=B to QA=B
THL/ tTLH output transition time
19
7
6
75
15
13
95
19
16
110
22
19
2.0 Fig.6
4.5
6.0
December 1990
6
NXP [ NXP ]
