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MC74LCX138_05 Datasheet, PDF (1/8 Pages) ON Semiconductor – Low-Voltage CMOS 3-to-8 Decoder/Demultiplexer With 5 V−Tolerant Inputs | |||
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MC74LCX138
LowâVoltage CMOS 3âtoâ8
Decoder/Demultiplexer
With 5 VâTolerant Inputs
The MC74LCX138 is a high performance, 3âtoâ8
decoder/demultiplexer operating from a 2.3 to 3.6 V supply. High
impedance TTL compatible inputs significantly reduce current
loading to input drivers while TTL compatible outputs offer improved
switching noise performance. A VI specification of 5.5 V allows
MC74LCX138 inputs to be safely driven from 5 V devices. The
MC74LCX138 is suitable for memory address decoding and other
TTL level busâoriented applications.
The MC74LCX138 highâspeed 3âtoâ8 decoder/demultiplexer
accepts three binary weighted inputs (A0, A1, A2) and, when enabled,
provides eight mutually exclusive activeâLOW outputs (O0âO7). The
LCX138 features three Enable inputs, two activeâLOW (E1, E2) and
one activeâHIGH (E3). All outputs will be HIGH unless E1 and E2 are
LOW, and E3 is HIGH. This multiple enabled function allows easy
parallel expansion of the device to a 1âofâ32 (5 lines to 32 lines)
decoder with just four LCX138 devices and one inverter (see
Figure 1). The LCX138 can be used as an 8âoutput demultiplexer by
using one of the activeâLOW Enable inputs as the data input and the
other Enable inputs as strobes. The Enable inputs which are not used
must be permanently tied to their appropriate activeâHIGH or
activeâLOW state.
Current drive capability is 24 mA at the outputs.
Features
⢠Designed for 2.3 V to 3.6 V VCC Operation
⢠5 V Tolerant Inputs â Interface Capability With 5 V TTL Logic
⢠LVTTL Compatible
⢠LVCMOS Compatible
⢠24 mA Balanced Output Sink and Source Capability
⢠Near Zero Static Supply Current (10 mA) Substantially Reduces
System Power Requirements
⢠Latchup Performance Exceeds 500 mA
⢠ESD Performance: Human Body Model >2000 V
Machine Model >200 V
⢠PbâFree Packages are Available*
16
1
http://onsemi.com
MARKING
DIAGRAMS
16
SOICâ16
D SUFFIX
CASE 751B
LCX138
AWLYWW
1
16
16
1
TSSOPâ16
DT SUFFIX
CASE 948F
LCX
138
ALYW
1
16
16
1
SOEIAJâ16
M SUFFIX
CASE 966
74LCX138
ALYW
1
A
L, WL
Y
W, WW
= Assembly Location
= Wafer Lot
= Year
= Work Week
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 3 of this data sheet.
*For additional information on our PbâFree strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2005
1
January, 2005 â Rev. 5
Publication Order Number:
MC74LCX138/D
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