SN74AS850A Datasheet, PDF (2/11 Pages) Texas Instruments – 1 OF 16 DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS

SN74AS850A, SN74AS851B
1 OF 16 DATA SELECTORS/MULTIPLEXERS
WITH 3ĆSTATE OUTPUTS
SDAS154A − D2822, DECEMBER 1983 − REVISED JANUARY 1990
FUNCTION TABLE
INPUT SELECTION TABLE
SELECT INPUTS ’AS850A ’AS851B INPUT
S3 S2 S1 S0 CLK
SC ^SELECTED
L L LL
↑
L
D0
L L LH
↑
L
D1
L L HL
↑
L
D2
L L HH
↑
L
D3
L HLL
↑
L
D4
L HLH
↑
L
D5
L H HL
↑
L
D6
L H HH
↑
L
D7
HL LL
↑
L
D8
HL LH
↑
L
D9
H L HL
↑
L
D10
H L HH
↑
L
D11
HHLL
↑
L
D12
HHLH
↑
L
D13
H H HL
↑
L
D14
H H HH
↑
L
D15
X X X X H or L
H
Dn
D = the input selected before the most-recent low-to-high
transition of CLK or SC.
ą
OUTPUT FUNCTION TABLE
OUTPUTS
G GY GW
YW
H XX
L HL
L LL
L HH
L LH
ZZ
ZZ
DZ
ZD
DD
D = level of selected input D0 − D15
logic symbols^†
G ¹⁰
GY ⁹
GW
CLK
11
12
S0
S1
18
17
S2 ¹⁶
S3 ¹⁵
D0 ⁸
7
D1
D2
6
5
D3
D4 ⁴
D5 ³
D6 ²
D7 ¹
D8
D9
27
26
D10 ²⁵
24
D11
D12
23
22
D13
D14
21
20
D15
’AS850A
G20 ^MUX
20EN21
20EN22
C23
23 D0
23 D3
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
G0
15
21
22
19
Y
13 _W
G ¹⁰
GY ⁹
GW
SC
11
12
S0
S1
18
17
S2 ¹⁶
S3 ¹⁵
D0 ⁸
7
D1
D2
6
5
D3
D4 ⁴
D5 ³
D6 ²
D7 ¹
D8
D9
27
26
D10 ²⁵
24
D11
D12
23
22
D13
D14
21
20
D15
’AS851B
G20 ^MUX
20EN21
20EN22
C23
23 D0
23 D3
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
G0
15
21
22
19
Y
13 _W
† _{These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.}
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