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参数资料
| 型号： | SNJ54HC157FKR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 编、解码器及复用、解复用 |
| 英文描述： | HC/UH SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, CQCC20 |
| 封装： | CERAMIC, LCC-20 |
| 文件页数： | 16/20页 |
| 文件大小： | 802K |
| 代理商： | SNJ54HC157FKR |
SN54HC157, SN74HC157
QUADRUPLE 2LINE TO 1LINE DATA SELECTORS/MULTIPLEXERS
SCLS113D DECEMBER 1982 REVISED SEPTEMBER 2003
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
switching characteristics over recommended operating free-air temperature range, CL = 150 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
VCC
TA = 25°C
SN54HC157
SN74HC157
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
2 V
81
190
290
235
A or B
Y
4.5 V
23
38
58
47
A or B
Y
6 V
18
33
49
41
2 V
81
210
320
260
tpd
A/B
Y
4.5 V
23
42
64
52
ns
tpd
A/B
Y
6 V
18
36
54
45
ns
2 V
91
190
290
235
G
Y
4.5 V
24
38
58
47
G
Y
6 V
18
33
49
41
2 V
45
210
315
265
tt
Y
4.5 V
17
42
63
53
ns
tt
Y
6 V
13
36
53
45
ns
operating characteristics, TA = 25°C
PARAMETER
TEST CONDITIONS
TYP
UNIT
Cpd
Power dissipation capacitance
No load
40
pF
PARAMETER MEASUREMENT INFORMATION
VOLTAGE WAVEFORM
INPUT RISE AND FALL TIMES
50%
10%
90%
VCC
0 V
tr
tf
Input
VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT TRANSITION TIMES
50%
10%
90%
VCC
VOH
VOL
0 V
tr
tf
Input
In-Phase
Output
50%
tPLH
tPHL
50%
10%
90%
VOH
VOL
tr
tf
tPHL
tPLH
Out-of-Phase
Output
Test
Point
From Output
Under Test
CL
(see Note A)
LOAD CIRCUIT
NOTES: A. CL includes probe and test-fixture capacitance.
B. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following
characteristics: PRR
≤ 1 MHz, ZO = 50 , tr = 6 ns, tf = 6 ns.
C. The outputs are measured one at a time with one input transition per measurement.
D. tPLH and tPHL are the same as tpd.
Figure 1. Load Circuit and Voltage Waveforms
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