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参数资料
| 型号： | SN54ALS253FK |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 编、解码器及复用、解复用 |
| 英文描述： | ALS SERIES, DUAL 4 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, CQCC20 |
| 封装： | CERAMIC, CC-20 |
| 文件页数： | 6/10页 |
| 文件大小： | 161K |
| 代理商： | SN54ALS253FK |
SN54ALS253, SN74ALS253, SN74AS253A
DUAL 1-OF-4 DATA SELECTORS/MULTIPLEXERS
WITH 3-STATE OUTPUTS
SDAS216A – APRIL 1982 – REVISED DECEMBER 1994
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN74AS253A
UNIT
PARAMETER
TEST CONDITIONS
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
VOH
VCC = 4.5 V,
IOH = – 15 mA
2.4
3.2
V
VOL
VCC = 4.5 V,
IOL = 48 mA
0.35
0.5
V
IOZH
VCC = 5.5 V,
VO = 2.7 V
50
A
IOZL
VCC = 5.5 V,
VO = 0.4 V
–50
A
II
A, B
VCC =5 5V
VI =7V
0.2
mA
II
All others
VCC = 5.5 V,
VI = 7 V
0.1
mA
IIH
A, B
VCC =5 5V
VI =2 7V
40
A
IIH
All others
VCC = 5.5 V,
VI = 2.7 V
20
A
IIL
A, B
VCC =5 5V
VI =0 4V
–1
mA
IIL
All others
VCC = 5.5 V,
VI = 0.4 V
– 0.5
mA
IO
VCC = 5.5 V,
VO = 2.25 V
–30
–112
mA
Outputs high
18
29
ICC
VCC = 5.5 V
Outputs low
20
32
mA
Outputs disabled
21
33
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 Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
R1 = 500
,
R2 = 500
,
TA = MIN to MAX§
UNIT
SN74AS253A
MIN
MAX
tPLH
AorB
Y
3
13.5
ns
tPHL
A or B
Y
3
11.5
ns
tPLH
Data
Y
2.5
7.5
ns
tPHL
(any C)
Y
2.5
8
ns
tPZH
OE
Any Y
2
12.5
ns
tPZL
OE
Any Y
2.5
11.5
ns
tPHZ
OE
Any Y
1
6
ns
tPLZ
OE
Any Y
1
7
ns
§ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
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