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参数资料
| 型号： | SN54F257FKR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 编、解码器及复用、解复用 |
| 英文描述： | F/FAST SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, CQCC20 |
| 封装： | CERAMIC, LCC-20 |
| 文件页数： | 4/7页 |
| 文件大小： | 145K |
| 代理商： | SN54F257FKR |
SN54F257, SN74F257
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS
WITH 3-STATE OUTPUTS
SDFS065A – D2932, MARCH 1987 – REVISED OCTOBER 1993
2–4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
switching characteristics (see Note 3)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 5 V,
CL = 50 pF,
R1 = 500
,
R2 = 500
,
TA = 25°C
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
R1 = 500
,
R2 = 500
,
TA = MIN to MAX
UNIT
′F257
SN54F257
SN74F257
MIN
TYP
MAX
MIN
MAX
MIN
MAX
tPLH
AorB
Any Y
2.2
4.1
6
2.2
8
2.2
7
ns
tPHL
A or B
Any Y
1.2
3.8
5.5
1
8
1.2
6.5
ns
tPLH
A/B
Any Y
3.7
9.7
13
3.7
15.5
3.7
15
ns
tPHL
A/B
Any Y
2.7
6.1
8.5
2.7
10.5
2.7
9.5
ns
tPZH
G
Any Y
2.2
5.5
7.5
2.2
9.5
2.2
8.5
ns
tPZL
G
Any Y
2.2
5.1
7.5
2.2
10
2.2
8.5
ns
tPHZ
G
Any Y
1.2
3.9
6
1.2
7
1.2
7
ns
tPLZ
G
Any Y
1.2
4.1
6
1.2
9.5
1.2
7
ns
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
NOTE 3: Load circuits and waveforms are shown in Section 1.
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