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CD54HC85 Datasheet(PDF) 5 Page - Texas Instruments

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Part No. CD54HC85
Description  High-Speed CMOS Logic 4-Bit Magnitude Comparator
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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CD54HC85 Datasheet(HTML) 5 Page - Texas Instruments

 
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5
(A > B) IN, (A < B) IN, (A = B) IN
to (A > B) OUT, (A < B) OUT
tPLH, tPHL CL = 50pF
2
-
-
140
-
175
-
210
ns
4.5
-
-
28
-
35
-
42
ns
CL = 15pF
5
-
11
-
-
-
-
-
ns
CL = 50pF
6
-
-
24
-
30
-
36
ns
(A > B) IN to (A = B) OUT
tPLH, tPHL CL = 50pF
2
-
-
120
-
150
-
180
ns
4.5
-
-
24
-
30
-
36
ns
CL = 15pF
5
-
9
-
-
-
-
-
ns
CL = 50pF
6
-
-
20
-
26
-
31
ns
Power Dissipation Capacitance
(Notes 3, 4)
CPD
-5
-
24
-
-
-
-
-
pF
Output Transition Times
(Figure 1)
tTLH, tTHL CL = 50pF
2
-
-
75
-
95
-
110
ns
4.5
-
-
15
-
19
-
22
ns
6
-
-
13
-
16
-
19
ns
Input Capacitance
CIN
-
-
-
-
10
-
10
-
10
pF
HCT TYPES
Propagation Delay,
An, Bn to (A > B) OUT,
(A < B) OUT
tPLH, tPHL CL = 50pF
4.5
-
-
37
-
46
-
56
ns
CL = 15pF
5
-
15
-
-
-
-
-
ns
An, Bn to (A = B) OUT
tPLH, tPHL CL = 50pF
4.5
-
-
40
-
50
-
60
ns
CL = 15pF
5
-
17
-
-
-
-
-
ns
(A > B) IN, (A < B) IN, (A = B) IN
to (A > B) OUT, (A < B) OUT
tPLH, tPHL CL = 50pF
4.5
-
-
30
-
38
-
45
ns
CL = 15pF
5
-
12
-
-
-
-
-
ns
(A > B) IN to (A = B) OUT
tPLH, tPHL CL = 50pF
4.5
-
-
31
-
39
-
47
ns
CL = 15pF
5
-
13
-
-
-
-
-
ns
Output Transition Times
(Figure 1)
tTLH, tTHL CL = 50pF
4.5
-
-
15
-
19
-
22
ns
Power Dissipation Capacitance
(Notes 3, 4)
CPD
-5
-
26
-
-
-
-
-
pF
Input Capacitance
CIN
-
-
-
-
10
-
10
-
10
pF
NOTES:
3. CPD is used to determine the dynamic power consumption, per gate/package.
4. PD = VCC
2 f
i (CPD + CL) where fi = Input Frequency, CL = Output Load Capacitance, VCC = Supply Voltage.
Switching Specifications Input tr, tf = 6ns (Continued)
PARAMETER
SYMBOL
TEST
CONDITIONS
VCC (V)
25oC
-40oC TO
85oC
-55oC TO
125oC
UNITS
MIN
TYP
MAX
MIN
MAX
MIN
MAX
Test Circuits and Waveforms
FIGURE 1. HC AND HCU TRANSITION TIMES AND PROPAGA-
TION DELAY TIMES, COMBINATION LOGIC
FIGURE 2. HCT TRANSITION TIMES AND PROPAGATION
DELAY TIMES, COMBINATION LOGIC
tPHL
tPLH
tTHL
tTLH
90%
50%
10%
50%
10%
INVERTING
OUTPUT
INPUT
GND
VCC
tr = 6ns
tf = 6ns
90%
tPHL
tPLH
tTHL
tTLH
2.7V
1.3V
0.3V
1.3V
10%
INVERTING
OUTPUT
INPUT
GND
3V
tr = 6ns
tf = 6ns
90%
CD54HC85, CD74HC85, CD54HCT85, CD74HCT85


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