MC74VHC138
3--to--8 Line Decoder
The MC74VHC138 is an advanced high speed CMOS 3--to--8
decoder fabricated with silicon gate CMOS technology. It achieves
high speed operation similar to equivalent Bipolar Schottky TTL
while maintaining CMOS low power dissipation.
When the device is enabled, three Binary Select inputs (A0 -- A2)
determine which one of the outputs (Y0
-- Y 7 ) will go Low. When
enable input E3 is held Low or either E2
or E1 is held High, decoding
function is inhibited and all outputs go high. E3, E2
,andE1inputs are
provided to ease cascade connection and for use as an address decoder
for memory systems.
The internal circuit is composed of three stages, including a buffer
output which provides high noise immunity and stable output. The
inputs tolerate voltages up to 7V, allowing the interface of 5V systems
to 3V systems.
• High Speed: t
PD
= 5.7ns (Typ) at V
CC
=5V
• Low Power Dissipation: I
CC
=4μA(Max)atT
A
=25°C
• High Noise Immunity: V
NIH
=V
NIL
= 28% V
CC
• Power Down Protection Provided on Inputs
• Balanced Propagation Delays
• Designed for 2V to 5.5V Operating Range
• Low Noise: V
OLP
=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: 122 FETs or 30.5 Equivalent Gates
• These devices are available in Pb--free package(s). Specifications herein
apply to both standard and Pb--free devices. Please see our website at
www.onsemi.com for specific Pb--free orderable part numbers, or
contact your local ON Semiconductor sales offic e or representative.
© Semiconductor Components Industries, LLC, 2006
March, 2006 -- Rev. 4
1 Publication Order Number:
MC74VHC138/D
Device Package Shipping
ORDERING INFORMATION
MC74VHC138D SOIC--16 48 Units/Rail
MC74VHC138DR2 SOIC--16
http://onsemi.com
2500 Units/Reel
SOIC--16
D SUFFIX
CASE 751B
TSSOP--16
DT SUFFIX
CASE 948F
SOIC EIAJ--16
M SUFFIX
CASE 966
MARKING DIAGRAMS
1
8
9
16
1
8
16 9
1
16 9
8
VHC138
AWLYYWW
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
VHC
138
AWL YWW
VHC138
ALYW
MC74VHC138DT TSSOP--16 96 Units/Rail
MC74VHC138DTR2 TSSOP--16 2500 Units/Reel
MC74VHC138M
SOIC
EIAJ--16
48 Units/Rail
MC74VHC138MEL
SOIC
EIAJ--16
2000 Units/Reel
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
A = Assembly Location
WL = Wafer Lot
Y = Year
WW = Work Week
