參數(shù)資料
型號: SN74HCT138DTE4
廠商: TEXAS INSTRUMENTS INC
元件分類: 編、解碼器及復(fù)用、解復(fù)用
英文描述: HCT SERIES, OTHER DECODER/DRIVER, INVERTED OUTPUT, PDSO16
封裝: GREEN, PLASTIC, SOIC-16
文件頁數(shù): 14/19頁
文件大?。?/td> 782K
代理商: SN74HCT138DTE4
SN54HCT138, SN74HCT138
3LINE TO 8LINE DECODERS/DEMULTIPLEXERS
SCLS171E MARCH 1984 REVISED SEPTEMBER 2003
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
recommended operating conditions (see Note 3)
SN54HCT138
SN74HCT138
UNIT
MIN
NOM
MAX
MIN
NOM
MAX
UNIT
VCC
Supply voltage
4.5
5
5.5
4.5
5
5.5
V
VIH
High-level input voltage
VCC = 4.5 V to 5.5 V
2
V
VIL
Low-level input voltage
VCC = 4.5 V to 5.5 V
0.8
V
VI
Input voltage
0
VCC
0
VCC
V
VO
Output voltage
0
VCC
0
VCC
V
t/v
Input transition rise/fall time
500
ns
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
SN54HCT138
SN74HCT138
UNIT
PARAMETER
TEST CONDITIONS
VCC
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
VOH
VI = VIH or VIL
IOH = 20 A
4.5 V
4.4
4.499
4.4
V
VOH
VI = VIH or VIL
IOH = 4 mA
4.5 V
3.98
4.3
3.7
3.84
V
VOL
VI = VIH or VIL
IOL = 20 A
4.5 V
0.001
0.1
V
VOL
VI = VIH or VIL
IOL = 4 mA
4.5 V
0.17
0.26
0.4
0.33
V
II
VI = VCC or 0
5.5 V
±0.1
±100
±1000
nA
ICC
VI = VCC or 0,
IO = 0
5.5 V
8
160
80
A
ICC
One input at 0.5 V or 2.4 V,
Other inputs at 0 or VCC
5.5 V
1.4
2.4
3
2.9
mA
Ci
4.5 V
to 5.5 V
3
10
pF
This is the increase in supply current for each input that is at one of the specified TTL voltage levels, rather than 0 V or VCC.
switching characteristics over recommended operating free-air temperature range, CL = 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
VCC
TA = 25°C
SN54HCT138
SN74HCT138
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
A, B, or C
Any Y
4.5 V
23
36
54
45
tpd
A, B, or C
Any Y
5.5 V
17
32
49
34
ns
tpd
Enable
Any Y
4.5 V
22
33
50
42
ns
Enable
Any Y
5.5 V
18
30
45
38
tt
Y
4.5 V
12
15
22
19
ns
tt
Y
5.5 V
11
14
20
17
ns
operating characteristics, TA = 25°C
PARAMETER
TEST CONDITIONS
TYP
UNIT
Cpd
Power dissipation capacitance
No load
85
pF
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