Specification	74LCX138BQX

Circuit	1 x 3:8
Current - Output High, Low	24 mA
Independent Circuits	1
Mounting Type	Surface Mount
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Package / Case	16-WFQFN Exposed Pad
Supplier Device Package	16-DQFN (2.5x3.5)
Type	Decoder/Demultiplexer
Voltage - Supply [Max]	3.6 V
Voltage - Supply [Min]	2 V
Voltage Supply Source	Single Supply

MC74LCX138 Series

Low Voltage CMOS 3-to-8 Decoder/Demultiplexer

Part	Operating Temperature [Max]	Operating Temperature [Min]	Type	Supplier Device Package	Mounting Type	Independent Circuits	Voltage Supply Source	Circuit	Package / Case [x]	Package / Case	Package / Case [y]	Voltage - Supply [Max]	Voltage - Supply [Min]	Current - Output High, Low	Package / Case	Package / Case
ON Semiconductor 74LCX138MTC	85 °C	-40 °C	Decoder/Demultiplexer	16-TSSOP	Surface Mount	1	Single Supply	1 x 3:8	0.173 in	16-TSSOP	4.4 mm	3.6 V	2 V	24 mA
ON Semiconductor 74LCX138M	85 °C	-40 °C	Decoder/Demultiplexer	16-SOIC	Surface Mount	1	Single Supply	1 x 3:8	0.154 in	16-SOIC	3.9 mm	3.6 V	2 V	24 mA
ON Semiconductor 74LCX138SJX	85 °C	-40 °C	Decoder/Demultiplexer	16-SOP	Surface Mount	1	Single Supply	1 x 3:8		16-SOIC		3.6 V	2 V	24 mA	0.209 "	5.3 mm
ON Semiconductor MC74LCX138MELG	85 °C	-40 °C	Decoder/Demultiplexer	16-SOEIAJ	Surface Mount	1	Single Supply	1 x 3:8		16-SOIC		3.6 V	2 V	24 mA	0.209 "	5.3 mm
ON Semiconductor 74LCX138SJX	85 °C	-40 °C	Decoder/Demultiplexer	16-SOP	Surface Mount	1	Single Supply	1 x 3:8		16-SOIC		3.6 V	2 V	24 mA	0.209 "	5.3 mm
ON Semiconductor MC74LCX138DT	85 °C	-40 °C	Decoder/Demultiplexer	16-TSSOP	Surface Mount	1	Single Supply	1 x 3:8	0.173 in	16-TSSOP	4.4 mm	3.6 V	2 V	24 mA
ON Semiconductor MC74LCX138DTR2G	85 °C	-40 °C	Decoder/Demultiplexer	16-TSSOP	Surface Mount	1	Single Supply	1 x 3:8	0.173 in	16-TSSOP	4.4 mm	3.6 V	2 V	24 mA
ON Semiconductor MC74LCX138DR2G	85 °C	-40 °C	Decoder/Demultiplexer	16-SOIC	Surface Mount	1	Single Supply	1 x 3:8	0.154 in	16-SOIC	3.9 mm	3.6 V	2 V	24 mA
ON Semiconductor MC74LCX138MEL	85 °C	-40 °C	Decoder/Demultiplexer	16-SOEIAJ	Surface Mount	1	Single Supply	1 x 3:8		16-SOIC		3.6 V	2 V	24 mA	0.209 "	5.3 mm
ON Semiconductor 74LCX138BQX	85 °C	-40 °C	Decoder/Demultiplexer	16-DQFN (2.5x3.5)	Surface Mount	1	Single Supply	1 x 3:8		16-WFQFN Exposed Pad		3.6 V	2 V	24 mA

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Bulk	1244	$ 0.24
Newark	Each (Supplied on Full Reel)	3000	$ 0.28
		6000	$ 0.26
		12000	$ 0.24
		18000	$ 0.23
		30000	$ 0.22
ON Semiconductor	N/A	1	$ 0.22

Description

General part information

MC74LCX138 Series

The MC74LCX138 is a high performance, 3-to-8 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 bus-oriented applications.The MC74LCX138 high-speed 3-to-8 decoder/demultiplexer accepts three binary weighted inputs (A0, A1, A2) and, when enabled, provides eight mutually exclusive active-LOW outputs (O0-O7). The LCX138 features three Enable inputs, two active-LOW (E1, E2) and one active-HIGH (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 1-of-32 (5 lines to 32 lines) decoder with just four LCX138 devices and one inverter (see Figure 1). The LCX138 can be used as an 8-output demultiplexer by using one of the active-LOW 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 active-HIGH or active-LOW state.