參數(shù)資料
型號： SN74ALS240A-1DWRG4
廠商： Texas Instruments, Inc.
英文描述： OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
中文描述： 八路緩沖器/ 3司機態(tài)輸出
文件頁數(shù)： 4/21頁
文件大?。?/td> 580K
代理商： SN74ALS240A-1DWRG4
SN54ALS240A, SN54AS240A, SN74ALS240A, SN74AS240A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SDAS214E
–
DECEMBER 1982
–
REVISED AUGUST 2002
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
recommended operating conditions
MIN
NOM
MAX
UNIT
VCC
VIH
Supply voltage
4.5
5
5.5
V
High-level input voltage
2
V
VIL
Low level input voltage
Low-level input voltage
SN54ALS240A
SN74ALS240A,
’
AS240A
0.7
0.8
V
IOH
High level output current
High-level output current
SN54ALS240A, SN54AS240A
–
12
mA
SN74ALS240A, SN74AS240A
–
15
SN54ALS240A
12
SN74ALS240A
24
48
IOL
Low-level output current
mA
SN54AS240A
48
SN74AS240A
SN54ALS240A, SN54AS240A
64
125
TA
Operating free-air temperature
O erating free-air tem erature
–
55
°
C
SN74ALS240A, SN74AS240A
0
70
Applies only to the -1 version and only if VCC is between 4.75 V and 5.25 V
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54ALS240A
MIN
TYP
SN74ALS240A
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 =
–
3 mA
IOH =
–
12 mA
IOH =
–
15 mA
IOL = 12 mA
IOL = 24 mA
IOL = 48 mA
VO = 2.7 V
VO = 0.4 V
VI = 7 V
VI = 2.7 V
VI = 0.4 V
VO = 2.25 V
Outputs high
–
1.2
–
1.2
V
VCC
–
2
2.4
VCC
–
2
2.4
VOH
3.2
3.2
V
VCC = 4.5 V
2
2
0.25
0.4
0.25
0.4
VOL
VCC = 4.5 V
0.35
0.5
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
4
11
4
11
ICC
VCC = 5.5 V
Outputs low
Outputs disabled
13
14
23
25
13
14
23
25
mA
Applies only to the -1 version and only if VCC is between 4.75 V and 5.25 V
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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