參數(shù)資料
型號(hào)： SN74ALS191ANSRG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 計(jì)數(shù)器
英文描述： ALS SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL BINARY COUNTER, PDSO16
封裝： GREEN, PLASTIC, SOP-16
文件頁(yè)數(shù)： 15/18頁(yè)
文件大小： 703K
代理商： SN74ALS191ANSRG4
SN54ALS191A, SN74ALS191A
SYNCHRONOUS 4BIT UP/DOWN BINARY COUNTERS
SDAS210C DECEMBER 1982 REVISED JULY 1996
6
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54ALS191A
SN74ALS191A
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
VIK
VCC = 4.5 V,
II = 18 mA
1.5
V
VOH
VCC = 4.5 V to 5.5 V,
IOH = 0.4 mA
VCC 2
VOL
VCC = 4.5 V
IOL = 4 mA
0.25
0.4
0.25
0.4
V
VOL
VCC = 4.5 V
IOL = 8 mA
0.35
0.5
V
II
VCC = 5.5 V,
VI = 7 V
0.2
0.1
mA
IIH
VCC = 5.5 V,
VI = 2.7 V
20
A
IIL
CTEN or CLK
VCC = 5.5 V,
VI = 0.4 V
0.2
mA
IIL
All others
VCC = 5.5 V,
VI = 0.4 V
0.2
0.1
mA
IO
VCC = 5.5 V,
VO = 2.25 V
20
112
30
112
mA
ICC
VCC = 5.5 V,
All inputs at 0
12
22
12
22
mA
All typical values are at VCC = 5 V, TA = 25°C.
The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.
switching characteristics (see Figure 1)
PARAMETER
FROM
(OUTPUT)
TO
(OUTPUT)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
RL = 500 ,
TA = MIN to MAX§
UNIT
PARAMETER
(OUTPUT)
SN54ALS191A
SN74ALS191A
UNIT
MIN
MAX
MIN
MAX
fmax
20
30
MHz
tPLH
LOAD
Any Q
7
37
7
30
ns
tPHL
LOAD
Any Q
8
34
8
30
ns
tPLH
A, B, C, D
Any Q
3
25
3
21
ns
tPHL
A, B, C, D
Any Q
4
25
4
21
ns
tPLH
CLK
RCO
5
24
5
20
ns
tPHL
CLK
RCO
5
25
5
20
ns
tPLH
CLK
Any Q
3
26
3
18
ns
tPHL
CLK
Any Q
3
22
3
18
ns
tPLH
CLK
MAX/MIN
8
37
8
31
ns
tPHL
CLK
MAX/MIN
8
34
8
31
ns
tPLH
D/U
RCO
8
45
8
37
ns
tPHL
D/U
RCO
10
36
10
28
ns
tPLH
D/U
MAX/MIN
8
35
8
25
ns
tPHL
D/U
MAX/MIN
8
30
8
25
ns
tPLH
CTEN
RCO
4
21
4
18
ns
tPHL
CTEN
RCO
4
23
4
18
ns
§ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
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PDF描述
SN74ALS191ANSR ALS SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL BINARY COUNTER, PDSO16
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