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参数资料
| 型号： | SN54AS138FKR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 编、解码器及复用、解复用 |
| 英文描述： | AS SERIES, OTHER DECODER/DRIVER, INVERTED OUTPUT, CQCC20 |
| 封装： | CERAMIC, LCC-20 |
| 文件页数： | 4/5页 |
| 文件大小： | 83K |
| 代理商： | SN54AS138FKR |
SN54ALS138, SN54AS138, SN74ALS138A, SN74AS138
3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS
SDAS055C – APRIL 1982 – REVISED FEBRUARY 1994
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
recommended operating conditions
SN54AS138
SN74AS138
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
2
V
VIL
Low-level input voltage
0.8
V
IOH
High-level output current
–2
mA
IOL
Low-level output current
20
mA
TA
Operating free-air temperature
–55
125
0
70
°C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54AS138
SN74AS138
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
VIK
VCC = 4.5 V,
II = – 18 mA
– 1.2
V
VOH
VCC = 4.5 V to 5.5 V,
IOH = – 2 mA
VCC –2
V
VOL
VCC = 4.5 V,
IOL = 20 mA
0.35
0.5
0.35
0.5
V
II
VCC = 5.5 V,
VI = 7 V
0.1
mA
IIH
VCC = 5.5 V,
VI = 2.7 V
20
A
IIL
VCC = 5.5 V,
VI = 0.4 V
– 0.5
mA
IO
VCC = 5.5 V,
VO = 2.25 V
–30
–112
–30
–112
mA
ICCH
VCC = 5.5 V
12
17.5
12
17.5
mA
ICCL
VCC = 5.5 V
14
20
14
20
mA
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.
switching characteristics (see Note 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
RL = 500 ,
TA = MIN to MAX
UNIT
()
SN54AS138
SN74AS138
MIN
MAX
MIN
MAX
tPLH
ABC
Any Y
2
11
2
10
ns
tPHL
A, B, C
Any Y
2
11
2
9.5
ns
tPLH
OE1
Any Y
2
11.5
2
10
ns
tPHL
OE1
Any Y
2
11
2
10
ns
tPLH
OE2
Any Y
2
9
2
7.5
ns
tPHL
OE2
Any Y
2
10
2
8.5
ns
NOTE 1:
Load circuit and voltage waveforms are shown in Section 1.
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