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CD74HC670 Datasheet, PDF (6/9 Pages) Texas Instruments – High-Speed CMOS Logic 4x4 Register File
◁
CD74HC670, CD74HCT670
Switching Specifications CL = 50pF, Input tr, tf = 6ns (Continued)
PARAMETER
Data to Output
TEST
SYMBOL CONDITIONS VCC (V) MIN
tPLH, tPHL CL = 50pF
2
-
4.5
-
25oC
TYP MAX
- 256
-
50
-40oC TO
85oC
MIN MAX
-
315
-
63
-55oC TO
125oC
MIN MAX UNITS
-
375 ns
-
75
ns
Output Disable Time
CL = 15pF
5
CL = 50pF
6
tPLZ, tPHZ CL = 50pF
2
4.5
-
21
-
-
-
-
-
-
43
-
54
-
-
-
150
-
190
-
-
-
30
-
38
-
-
ns
64
ns
225 ns
45
ns
Output Enable Time
CL = 15pF
5
CL = 50pF
6
tPZL, tPZH CL = 50pF
2
4.5
-
12
-
-
-
-
-
-
26
-
33
-
-
-
150
-
190
-
-
-
30
-
38
-
-
ns
38
ns
225 ns
45
ns
Output Transition Time
CL = 15pF
5
-
12
-
-
-
-
-
ns
CL = 50pF
6
-
-
26
-
33
-
38
ns
tTHL, tTLH CL = 50pF
2
-
-
75
-
95
-
110 ns
4.5
-
-
15
-
19
-
22
ns
6
-
-
13
-
10
-
19
ns
Input Capacitance
Three-State Output
Capacitance
CI
CL = 50pF
-
10
-
10
-
10
-
10
pF
CO
-
-
20
-
20
-
20
-
20
pF
Power Dissipation Capacitance CPD
CL = 15pF
5
(Notes 6, 7)
-
59
-
-
-
-
-
pF
HCT TYPES
Propagation Delay
Reading Any Word
tPHL, tPLH
CL = 50pF
4.5
-
-
40
-
50
-
53
ns
CL = 15pF
5
-
17
-
-
-
-
-
ns
Write Enable to Output
tPHL, tPLH CL = 50pF
4.5
-
-
50
-
63
-
75
ns
CL = 15pF
5
-
21
-
-
-
-
-
ns
Data to Output
tPHL, tPLH CL = 50pF
4.5
-
-
50
-
63
-
75
ns
CL = 15pF
5
-
21
-
-
-
-
-
ns
Output Disable Time
tPLZ, tPHZ CL = 50pF
4.5
-
-
35
-
44
-
53
ns
CL = 15pF
5
-
14
-
-
-
-
-
ns
Output Enable Time
tPZL, tPZH CL = 50pF
4.5
-
-
38
-
48
-
57
ns
CL = 15pF
5
-
16
-
-
-
-
-
ns
Output Transition Time
tTLH, tTHL CL = 50pF
4.5
-
-
15
-
19
-
22
ns
Input Capacitance
CI
CL = 50pF
-
10
-
10
-
10
-
10
pF
Three-State Output
Capacitance
CO
-
-
20
-
20
-
20
-
20
pF
Power Dissipation Capacitance CPD
CL = 15pF
5
(Notes 6, 7)
-
66
-
-
-
-
-
pF
NOTES:
6. CPD is used to determine the dynamic power consumption, per output.
7. PD = CPD VCC2 fi + ∑ CL VCC2 fO where fi = Input Frequency, fO = Output Frequency, CL = Output Load Capacitance, VCC = Supply
Voltage.
6
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