CD54HC190_15 Datasheet, PDF (15/31 Pages) Texas Instruments – SYNCHORONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL

’HCT191
CD54HC190, CD74HC190
CD54HC191, CD74HC191, CD54HCT191, CD74HCT191
SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL
SCHS275E − MARCH 2002 − REVISED OCTOBER 2003
timing requirements over recommended operating free-air temperature range V_CC = 4.5 V (unless
otherwise noted) (see Figure 5)
fclock Clock frequency
tw
Pulse duration
tsu
Setup time
th
Hold time
trec Recovery time
LOAD low
CLK high or low
Data before LOAD↑
CTEN before CLK↑
D/U before CLK↑
Data before LOAD↑
CTEN before CLK↑
D/U before CLK↑
LOAD inactive before CLK↑
TA = 25°C
MIN MAX
30
16
20
12
12
18
2
2
0
12
TA = −55°C
TO 125°C
MIN MAX
20
24
30
18
18
27
2
2
0
18
TA = −40°C
TO 85°C
MIN MAX
25
20
25
15
15
23
2
2
0
15
UNIT
MHz
ns
ns
ns
ns
’HCT191
switching characteristics over recommended operating free-air temperature range (unless
otherwise noted) (see Figure 5)
PARAMETER
FROM
(INPUT)
fmax
LOAD
A, B, C,
or D
CLK
CLK
tpd
CLK
D/U
D/U
CTEN
tt
TO
(OUTPUT)
LOAD
CAPACITANCE
VCC
Q
Q
RCO
Q
MAX/MIN
RCO
MAX/MIN
RCO
Any
CL = 50 pF
CL = 15 pF
CL = 50 pF
CL = 15 pF
CL = 50 pF
CL = 15 pF
CL = 50 pF
CL = 15 pF
CL = 50 pF
CL = 15 pF
CL = 50 pF
CL = 15 pF
CL = 50 pF
CL = 15 pF
CL = 50 pF
CL = 15 pF
CL = 50 pF
4.5 V
4.5 V
5V
4.5 V
5V
4.5 V
5V
4.5 V
5V
4.5 V
5V
4.5 V
5V
4.5 V
5V
4.5 V
5V
4.5 V
TA = 25°C
MIN TYP MAX
30
40
17
38
16
35
14
27
11
42
18
30
12
38
16
27
11
15
TA = −55°C
TO 125°C
MIN MAX
20
60
57
53
41
63
45
57
41
22
TA = −40°C
TO 85°C
MIN MAX
25
50
48
44
34
53
38
48
34
19
UNIT
MHz
ns
ns
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