D ts e t
aa h e
R c e t r lc r nc
o h se Ee to is
Ma u a t r dCo o e t
n fc u e
mp n n s
R c e tr b a d d c mp n ns ae
o h se rn e
o oet r
ma ua trd u ig ete dewaes
n fcue sn i r i/ fr
h
p rh s d f m te oiia s p l r
uc a e r
o h r n l u pi s
g
e
o R c e tr waes rce td f m
r o h se
fr e rae r
o
te oiia I. Al rce t n ae
h
r nl P
g
l e rai s r
o
d n wi tea p o a o teOC
o e t h p rv l f h
h
M.
P r aetse u igoiia fcoy
at r e td sn r n la tr
s
g
ts p o rmso R c e tr e eo e
e t rga
r o h se d v lp d
ts s lt n t g aa te p o u t
e t oui s o u rne
o
rd c
me t o e c e teOC d t s e t
es r x e d h
M aa h e.
Qu l yOv riw
ai
t
e ve
• IO- 0 1
S 90
•A 92 cr ct n
S 1 0 et ai
i
o
• Qu l e Ma ua trr Ls (
ai d
n fcues it QML MI- R -
) LP F
385
53
•C a sQ Mitr
ls
lay
i
•C a sVS a eL v l
ls
p c ee
• Qu l e S p l r Ls o D sr uos( L )
ai d u pi s it f it b tr QS D
e
i
•R c e trsacic l u pir oD A a d
o h se i
r ia s p l t L n
t
e
me t aln u t a dD A sa d r s
es lid sr n L tn ad .
y
R c e tr lcrnc , L i c mmi e t
o h se Ee t is L C s o
o
tdo
t
s p ligp o u t ta s t f c so r x e t-
u pyn rd cs h t ai y u tme e p ca
s
t n fr u lya daee u loto eoiial
i s o q ai n r q a t h s r n l
o
t
g
y
s p l db id sr ma ua trr.
u pi
e yn ut
y n fcues
T eoiia ma ua trr d ts e t c o a yn ti d c me t e e t tep r r n e
h r n l n fcue’ aa h e a c mp n ig hs o u n r cs h ef ma c
g
s
o
a ds e ic t n o teR c e tr n fcue v rino ti d vc . o h se Ee t n
n p c ai s f h o h se ma ua trd eso f hs e ie R c e tr lcr -
o
o
isg aa te tep r r n eo i s mio d co p o u t t teoiia OE s e ic -
c u rne s h ef ma c ft e c n u tr rd cs o h r n l M p c a
o
s
g
t n .T pc lv le aefr eee c p r o e o l. eti mii m o ma i m rt g
i s ‘y ia’ au s r o rfrn e up s s ny C r n nmu
o
a
r xmu ai s
n
ma b b s do p o u t h rceiain d sg , i lt n o s mpetsig
y e a e n rd c c aa tr t , e in smuai , r a l e t .
z o
o
n
© 2 1 R cetr l t n s LC Al i t R sre 0 1 2 1
0 3 ohs E cr i , L . lRg s eevd 7 1 0 3
e e oc
h
T l r m r, l s v iw wrcl . m
o e n oe p ae it w . e c o
a
e
s
o ec
74ACT11251
1 OF 8 DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS
•
•
•
•
•
•
•
•
•
Inputs Are TTL-Voltage Compatible
3-State Outputs Interface Directly With
System Bus
Performs Parallel-to-Serial Conversion
Complementary Outputs Provide True and
Inverted Data
New Flow-Through Architecture to
Optimize PCB Layout
Center-Pin V
CC
and GND Configurations to
Minimize High-Speed Switching Noise
EPIC (Enhanced-Performance Implanted
CMOS) 1-µm Process
500-mA Typical Latch-Up Immunity at
125°C
Package Options Include Plastic Small-
Outline Packages, and Standard Plastic
300-mil DIPs
D OR N PACKAGE
(TOP VIEW)
SCAS076 − OCTOBER 1989 − REVISED APRIL 1993
D0
G
Y
GND
W
A
B
C
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
D1
D2
D3
D4
V
CC
D5
D6
D7
description
This data selector/multiplexer contains full binary decoding to select one-of-eight data sources and features
strobe-controlled complementary 3-state outputs.
The 3-state outputs can interface with and drive data lines of bus-organized systems. With all but
one of the common outputs disabled (at a high-impedance state), the low-impedance of the signal enabled
output will drive the bus line to a high or low logic level. Both outputs are controlled by the strobe (G). The outputs
are disabled when G is high.
The 74ACT11251 is characterized for operation from − 40°C to 85°C.
EPIC is a trademark of Texas Instruments Incorporated.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright
1993, Texas Instruments Incorporated
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
1
SCAS076 − OCTOBER 1989 − REVISED APRIL 1993
74ACT11251
1 OF 8 DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS
FUNCTION TABLE
INPUTS
SELECT
C
X
L
L
L
L
H
H
H
H
B
X
L
L
H
H
L
L
H
H
A
X
L
H
L
H
L
H
L
H
STROBE
G
H
L
L
L
L
L
L
L
L
OUTPUTS
Y
Z
D0
D1
D2
D3
D4
D5
D6
D7
W
Z
D0
D1
D2
D3
D4
D5
D6
D7
FAMILY NAME
logic symbol
†
G
A
B
C
D0
D1
D2
D3
D4
D5
D6
D7
2
6
7
8
1
16
15
14
13
11
10
9
2
0
1
2
3
4
5
6
7
3
Y
5
W
MUX
EN
0
G
0
7
H = high level, L = low level, X = irrelevant.
D0, D1,...D7 = the level of the respective D input
† This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
logic diagram (positive logic)
G
D0
D1
D2
D3
Data
Inputs
D4
D5
D6
D7
13
11
10
9
2
1
16
15
14
3 Y
5 W
A
Data
Select
(Binary)
B
C
6
7
8
2
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
FAMILY NAME
74ACT11251
1 OF 8 DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS
SCAS076 − OCTOBER 1989 − REVISED APRIL 1993
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage range, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Input voltage range, V
I
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to V
CC
+ 0.5 V
Output voltage range, V
O
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to V
CC
+ 0.5 V
Input clamp current, I
IK
(V
I
< 0 or V
I
> V
CC
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
20 mA
Output clamp current, I
OK
(V
O
< 0 or V
O
> V
CC
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
50 mA
Continuous output current, I
O
(V
O
= 0 to V
CC
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
50 mA
Continuous current through V
CC
or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
100 mA
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
recommended operating conditions
MIN
VCC
VIH
VIL
VI
VO
IOH
IOL
∆t/∆v
TA
Supply voltage
High-level input voltage
Low-level input voltage
Input voltage
Output voltage
High-level output current
Low-level output current
Input transition rise or fall rate
Operating free-air temperature
0
−40
0
0
4.5
2
0.8
VCC
VCC
−24
24
10
85
MAX
5.5
UNIT
V
V
V
V
V
mA
mA
ns/V
°C
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
3
SCAS076 − OCTOBER 1989 − REVISED APRIL 1993
74ACT11251
1 OF 8 DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS
FAMILY NAME
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
IOH = − 50
µA
A
VOH
IOH = − 24 mA
IOH = − 75 mA†
IOL = − 50
µA
A
VOL
IOL = − 24 mA
IOL = 75 mA†
VO = VCC or GND
VI = VCC or GND
VI = VCC or GND,
IO = 0
VCC
4.5 V
5.5 V
4.5 V
5.5 V
5.5 V
4.5 V
5.5 V
4.5 V
5.5 V
5.5 V
5.5 V
5.5 V
5.5 V
5.5 V
5V
5V
3.5
8
±
0.5
±
0.1
8
0.9
0.1
0.1
0.36
0.36
TA = 25°C
MIN
TYP
MAX
4.4
5.4
3.94
4.94
MIN
4.4
5.4
3.8
4.8
3.85
0.1
0.1
0.44
0.44
1.65
±
5
±
1
80
1
µA
µA
µA
mA
pF
pF
V
V
MAX
UNIT
IOZ
II
ICC
∆I
CC‡
Ci
Co
One input at 3.4 V,
Other inputs at VCC or GND
VI = VCC or GND
VO = VCC or GND
† Not more than one output should be tested at a time and the duration of the test should not exceed 10 ms.
‡ This is the increase in supply current for each input that is at one of the specified TTL voltage levels rather than 0 V to VCC.
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figure 1)
PARAMETER
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPZH
tPZL
tPZH
tPZL
tPHZ
tPLZ
tPHZ
tPLZ
FROM
(INPUT)
A, B, or C
A, B, or C
Any D
Any D
G
G
G
G
TO
(OUTPUT)
Y
W
Y
W
Y
W
Y
W
TA = 25°C
MIN
TYP
MAX
3.2
2.7
2.5
2.8
3
2
1.7
2.7
1.3
1.3
1
1.3
4.1
3.1
4.1
3.2
6.8
6.7
6.3
6.3
5.7
5.2
4.7
5.1
3.7
4
4.4
4.1
5.7
4
5.7
4.1
10.2
9.5
8.8
9.7
7.8
7.9
7.1
7.2
6.2
6
6.4
5.8
7.6
6.6
7.7
6.6
MIN
3.2
2.7
2.5
2.8
3
2
1.7
2.7
1.3
1.3
1
1.3
4.1
3.1
4.1
3.2
MAX
11.4
10.5
9.8
10.8
8.7
8.6
7.8
8
6.8
6.8
7
6.4
8.1
6.9
8.2
6.9
ns
ns
ns
ns
ns
ns
ns
ns
UNIT
4
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
