參數(shù)資料
型號(hào)： SN74AHC240DBRG4
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(jī)態(tài)輸出
文件頁數(shù)： 3/20頁
文件大?。?/td> 690K
代理商： SN74AHC240DBRG4
SN54AHC240, SN74AHC240
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCLS251H
–
OCTOBER 1995
–
REVISED JULY 2003
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
recommended operating conditions (see Note 3)
SN54AHC240
MIN
SN74AHC240
MIN
UNIT
MAX
MAX
VCC
Supply voltage
2
5.5
2
5.5
V
VCC = 2 V
VCC = 3 V
VCC = 5.5 V
VCC = 2 V
VCC = 3 V
VCC = 5.5 V
1.5
1.5
VIH
High-level input voltage
2.1
2.1
V
3.85
3.85
0.5
0.5
VIL
Low-level input voltage
0.9
0.9
V
1.65
1.65
VI
VO
Input voltage
0
5.5
0
5.5
V
Output voltage
0
VCC
–
50
0
VCC
–
50
V
VCC = 2 V
VCC = 3.3 V
±
0.3 V
VCC = 5 V
±
0.5 V
VCC = 2 V
VCC = 3.3 V
±
0.3 V
VCC = 5 V
±
0.5 V
VCC = 3.3 V
±
0.3 V
VCC = 5 V
±
0.5 V
A
IOH
High-level output current
–
4
–
4
mA
–
8
–
8
50
50
A
IOL
Low-level output current
4
4
mA
8
8
t
/
v
Input transition rise or fall rate
100
100
ns/V
20
20
TA
Operating free-air temperature
–
55
125
–
40
85
°
C
NOTE 3: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs
, literature number SCBA004.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
TA = 25
°
C
TYP
SN54AHC240
MIN
1.9
SN74AHC240
MIN
1.9
UNIT
MIN
1.9
MAX
MAX
MAX
2 V
2
IOH =
–
50 A
3 V
2.9
3
2.9
2.9
VOH
4.5 V
4.4
4.5
4.4
4.4
V
IOH =
–
4 mA
IOH =
–
8 mA
3 V
2.58
2.48
2.48
4.5 V
3.94
3.8
3.8
2 V
0.1
0.1
0.1
IOL = 50 A
3 V
0.1
0.1
0.1
VOL
4.5 V
0.1
0.1
0.1
V
IOL = 4 mA
IOL = 8 mA
VI = 5.5 V or GND
VO = VCC or GND,
VI (OE) = VIL or VIH
VI = VCC or GND,
VI = VCC or GND
VO = VCC or GND
3 V
0.36
0.5
0.44
4.5 V
0.36
0.5
0.44
II
0 V to 5.5 V
±
0.1
±
1*
±
1
A
IOZ
5.5 V
±
0.25
±
2.5
±
2.5
A
ICC
Ci
Co
IO = 0
5.5 V
4
40
40
A
5 V
2.5
10
10
pF
5 V
3.5
pF
* On products compliant to MIL-PRF-38535, this parameter is not production tested at VCC = 0 V.
The parameter IOZ includes the input leakage current.
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