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參數(shù)資料
| 型號： | 935265468118 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 編、解碼器及復用、解復用 |
| 英文描述： | AHC SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO16 |
| 封裝： | 4.40 MM, PLASTIC, MO-153, SOT-403-1, TSSOP-16 |
| 文件頁數(shù)： | 3/20頁 |
| 文件大小： | 89K |
| 代理商： | 935265468118 |
2000 Apr 03
Philips Semiconductors
Product specication
Quad 2-input multiplexer; 3-state
74AHC257;
74AHCT257
handbook, full pagewidth
MNA450
tPLZ
tPHZ
outputs
disabled
outputs
enabled
VOH 0.3 V
VOL + 0.3 V
outputs
enabled
output
LOW-to-OFF
OFF-to-LOW
output
HIGH-to-OFF
OFF-to-HIGH
OE input
VI
VCC
VM
(1)
VOL
VOH
GND
tPZL
tPZH
VM
(2)
VM
(2)
Fig.7 3-state enable and disable times.
FAMILY
VI INPUT
REQUIREMENTS
VM(1)
INPUT
VM(2)
OUTPUT
AHC
GND to VCC
50% VCC 50% VCC
AHCT
GND to 3.0 V
1.5 V
50% VCC
Fig.7 3-state enable and disable times.
Fig.8 Load circuitry for switching times.
handbook, full pagewidth
open
GND
VCC
VI
VO
MNA219
D.U.T.
CL
RT
1000
PULSE
GENERATOR
S1
TEST
S1
tPLH/tPHL
open
tPLZ/tPZL
VCC
tPHZ/tPZH
GND
Definitions for test circuit.
CL = load capacitance including jig and probe capacitance (See Chapter “AC characteristics”).
RT = termination resistance should be equal to the output impedance Zo of the pulse generator.
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