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SN54ALS190 Datasheet(PDF) 7 Page - Texas Instruments

Part No. SN54ALS190
Description  SYNCHRONOUS 4-BIT UP/DOWN DECADE AND BINARY COUNTERS
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
Logo TI - Texas Instruments

SN54ALS190 Datasheet(HTML) 7 Page - Texas Instruments

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FROM
(INPUT)
TO
(OUTPUT)
fmax
MHz
LOAD
Any Q
ns
ns
ns
ns
ns
ns
ns
ns
A, B, C, D
Any Q
CLK
RCO
CLK
Any Q
CLK
CTEN
D/U
D/U
MAX/MIN
MAX/MIN
RCO
RCO
SN54ALS190, SN54ALS191, SN74ALS190, SN74ALS191
SYNCHRONOUS 4-BIT UP/DOWN DECADE COUNTERS
SDAS210 – D2661, DECEMBER 1982 – REVISED MAY 1986
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
7
switching characteristics (see Note 1)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
RL = 500 Ω,
PARAMETER
TA = MIN to MAX
UNIT
SN54ALS190
SN74ALS190
SN54ALS191
SN74ALS191
MIN
MAX
MIN
MAX
’ALS190
20
25
’ALS191
20
30
tPLH
7
37
8
30
tPHL
8
34
8
30
tPLH
4
25
4
21
tPHL
4
25
5
21
tPLH
5
24
5
20
tPHL
5
25
5
20
tPLH
3
26
3
18
tPHL
3
22
3
18
tPLH
8
37
8
31
tPHL
8
34
8
31
tPLH
12
45
15
37
tPHL
10
36
10
28
tPLH
8
35
8
25
tPHL
8
30
8
25
tPLH
4
21
4
18
tPHL
4
23
4
18
NOTE 1: Load circuit and voltage waveforms are shown in Section 1.


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