MC74VHC257(2001) 查看數據表（PDF） - ON Semiconductor
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MC74VHC257 Datasheet PDF : 8 Pages
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MC74VHC257
Quad 2-Channel Multiplexer
with 3-State Outputs
The MC74VHC257 is an advanced high speed CMOS quad
2–channel multiplexer fabricated with silicon gate CMOS technology.
It achieves high speed operation similar to equivalent Bipolar
Schottky TTL while maintaining CMOS low power dissipation.
It consists of four 2–input digital multiplexers with common select
(S) and enable (OE) inputs. When (OE) is held High, selection of data
is inhibited and all the outputs go Low.
The select decoding determines whether the A or B inputs get routed
to the corresponding Y outputs.
The inputs tolerate voltages up to 7V, allowing the interface of 5V
systems to 3V systems.
• High Speed: tPD = 4.1ns (Typ) at VCC = 5V
• Low Power Dissipation: ICC = 4µA (Max) at TA = 25°C
• High Noise Immunity: VNIH = VNIL = 28% VCC
• Power Down Protection Provided on Inputs
• Balanced Propagation Delays
• Designed for 2V to 5.5V Operating Range
• Low Noise: VOLP = 0.8V (Max)
• Pin and Function Compatible with Other Standard Logic Families
• Latchup Performance Exceeds 300mA
• ESD Performance: HBM > 2000V; Machine Model > 200V
• Chip Complexity: FETs = 100; Equivalent Gates = 25
S1
A0 2
B0 3
Y0 4
A1 5
B1 6
Y1 7
GND 8
16 VCC
15 OE
14 A3
13 B3
12 Y3
11 A2
10 B2
9 Y2
Figure 1. Pin Assignment
http://onsemi.com
MARKING DIAGRAMS
SO–16
D SUFFIX
CASE 751B
16
9
VHC257
AWLYWW
1
8
TSSOP–16
DT SUFFIX
CASE 948F
16
9
VHC257
ALYW
1
8
16
9
EIAJ SO–16
M SUFFIX
CASE 966
VHC257
ALYW
1
8
A
L, WL
Y
W, WW
= Assembly Location
= Wafer Lot
= Year
= Work Week
ORDERING INFORMATION
Device
MC74VHC257D
MC74VHC257DR2
Package
SO–16
SO–16
Shipping
48 Units/Rail
2500 Tape & Reel
MC74VHC257DT TSSOP–16 96 Units/Rail
MC74VHC257DTR2 TSSOP–16 2500 Tape & Reel
MC74VHC257M EIAJ–SO–16 50 Units/Rail
MC74VHC257MEL EIAJ–SO–16 2000 Tape & Reel
© Semiconductor Components Industries, LLC, 2001
1
April, 2001 – Rev. 2
Publication Order Number:
MC74VHC257/D
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