Product Overview MC74LCX138: Low Voltage CMOS 3-to-8 Decoder/Demultiplexer For complete documentation, see the data sheet Product Description 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. Features • • • • • • • • Designed for 2.3 V to 3.6 V VCC Operation 5V Tolerant Inputs - Interface Capability With 5V TTL Logic LVTTL Compatible LVCMOS Compatible 24mA Balanced Output Sink and Source Capability Near Zero Static Supply Current (10<FONT FACE=SYMBOL>m</font>A) Substantially Reduces System Power Requirements Latchup Performance Exceeds 500mA ESD Performance: Human Body Model >2000V; Machine Model >200V • Pb-Free Packages are Available* Part Electrical Specifications Product MC74LCX138DR2G Compliance Status Channels VCC Min (V) VCC Max (V) tpd Max (ns) IO Max (mA) Package Type Pb-free Active 1 2 3.6 6 24 SOIC-16 Active 1 2 3.6 6 24 TSSOP-16 Active 1 2 3.6 6 24 TSSOP-16 Active 1 2 3.6 6 24 SOIC-16 Halide free MC74LCX138DTG Pb-free Halide free MC74LCX138DTR2G Pb-free Halide free NLV74LCX138DR2G AEC Qualified PPAP Capable Pb-free Halide free For more information please contact your local sales support at www.onsemi.com Created on: 6/30/2016