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參數(shù)資料
| 型號(hào)： | SN54ALS251FK |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 1-OF-8 DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS |
| 中文描述： | 1中，8個(gè)數(shù)據(jù)選擇器/多路復(fù)用器與三態(tài)輸出 |
| 文件頁(yè)數(shù)： | 3/6頁(yè) |
| 文件大?。?/td> | 96K |
| 代理商： | SN54ALS251FK |
SN54ALS251, SN74ALS251
1-OF-8 DATA SELECTORS/MULTIPLEXERS
WITH 3-STATE OUTPUTS
SDAS215A – APRIL 1982 – REVISED DECEMBER 1994
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
CC
Input voltage, V
I
Voltage applied to a disabled 3-state output
Operating free-air temperature range, T
A
: SN54ALS251
7 V
7 V
5.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74ALS251
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–55
°
C to 125
°
C
0
°
C to 70
°
C
–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.
recommended operating conditions
SN54ALS251
MIN
NOM
SN74ALS251
MIN
NOM
UNIT
MAX
MAX
VCC
VIH
VIL
IOH
IOL
TA
Supply voltage
4.5
5
5.5
4.5
5
5.5
V
High-level input voltage
2
2
V
Low-level input voltage
0.7
0.8
V
High-level output current
–1
–2.6
mA
Low-level output current
12
24
mA
°
C
Operating free-air temperature
–55
125
0
70
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54ALS251
MIN
TYP
SN74ALS251
MIN
TYP
UNIT
MAX
MAX
VIK
VCC = 4.5 V,
VCC = 4.5 V to 5.5 V,
II = –18 mA
IOH = –0.4 mA
IOH = –1 mA
IOH = –2.6 mA
IOL = 12 mA
IOL = 24 mA
VO = 2.7 V
VO = 0.4 V
VI = 7 V
VI = 2.7 V
VI = 0.4 V
VO = 4.5 V
Inputs at GND
Inputs at 4.5 V
–1.5
–1.5
V
VCC –2
2.4
VCC –2
VOH
VCC= 4 5 V
VCC = 4.5 V
3.3
V
2.4
3.2
VOL
VCC= 4 5 V
VCC = 4.5 V
0.25
0.4
0.25
0.4
V
0.35
0.5
IOZH
IOZL
II
IIH
IIL
IO§
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
20
20
μ
A
μ
A
mA
μ
A
mA
–20
–20
0.1
0.1
20
20
–0.1
–0.1
–20
–112
–30
–112
mA
ICC
Enabled
Disabled
VCC= 5 5 V
VCC = 5.5 V
7
10
14
7
10
14
mA
9.4
9.4
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.
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