Nexperia
74HC85; 74HCT85
4-bit magnitude comparator
74HC_HCT85 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2018. All rights reserved.
Product data sheet Rev. 3 — 20 April 2018
8 / 19
11 Dynamic characteristics
Table 7. Dynamic characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V);
C
L
= 50 pF unless otherwise specified; for test circuit, see Figure 8
25 °C -40 °C to
+85 °C
-40 °C to
+125 °C
Symbol Parameter Conditions
Min Typ Max Min Max Min Max
Unit
74HC85
An, Bn to Q
A>B
;
An, Bn to Q
A<B
; see Figure 7
[1]
V
CC
= 2.0 V - 63 195 - 245 - 295 ns
V
CC
= 4.5 V - 23 39 - 49 - 59 ns
V
CC
= 6.0 V - 18 33 - 42 - 50 ns
V
CC
= 5.0 V; C
L
= 15 pF - 20 - - - - - ns
An, Bn to Q
A=B
; see Figure 7
V
CC
= 2.0 V - 58 175 - 220 - 265 ns
V
CC
= 4.5 V - 21 35 - 44 - 53 ns
V
CC
= 6.0 V - 17 30 - 37 - 45 ns
V
CC
= 5.0 V; C
L
= 15 pF - 18 - - - - - ns
I
A=B
or I
A>B
to Q
A<B
;
I
A<B
or I
A=B
to Q
A>B
;
see Figure 7
V
CC
= 2.0 V - 50 140 - 175 - 210 ns
V
CC
= 4.5 V - 18 28 - 35 - 42 ns
V
CC
= 6.0 V - 14 24 - 30 - 36 ns
V
CC
= 5.0 V; C
L
= 15 pF - 15 - - - - - ns
I
A=B
to Q
A=B
; see Figure 7
V
CC
= 2.0 V - 39 120 - 150 - 180 ns
V
CC
= 4.5 V - 14 24 - 30 - 36 ns
V
CC
= 6.0 V - 11 20 - 26 - 31 ns
t
pd
propagation
delay
V
CC
= 5.0 V; C
L
= 15 pF - 11 - - - - - ns
see Figure 7
[2]
V
CC
= 2.0 V - 19 75 - 95 - 110 ns
V
CC
= 4.5 V - 7 15 - 19 - 22 ns
t
t
transition time
V
CC
= 6.0 V - 6 13 - 16 - 19 ns
C
PD
power
dissipation
capacitance
per package; V
I
= GND to V
CC
[3]
- 18 - - - - - pF