MC74LCX138: Low Voltage CMOS 3-to-8 Decoder/Demultiplexer
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 (10mA) Substantially Reduces System Power Requirements
- Latchup Performance Exceeds 500mA
- ESD Performance: Human Body Model >2000V; Machine Model >200V
- Pb-Free Packages are Available*
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Simulation Models (3)
Package Drawings (2)
Data Sheets (1)
Order Information
Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
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MC74LCX138DR2G | Active | Pb-free
Halide free | SOIC-16 | 751B-05 | 1 | Tape and Reel | 2500 | $0.24 |
MC74LCX138DTG | Active | Pb-free
Halide free | TSSOP-16 | 948F-01 | 1 | Tube | 96 | $0.2319 |
MC74LCX138DTR2G | Active | Pb-free
Halide free | TSSOP-16 | 948F-01 | 1 | Tape and Reel | 2500 | $0.2319 |
NLV74LCX138DR2G | Active | AEC Qualified
PPAP Capable
Pb-free
Halide free | SOIC-16 | 751B-05 | 1 | Tape and Reel | 2500 | $0.264 |
Specifications
Product | Channels | VCC Min (V) | VCC Max (V) | tpd Max (ns) | IO Max (mA) |
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MC74LCX138DR2G | 1 | 2 | 3.6 | 6 | 24 |
MC74LCX138DTG | 1 | 2 | 3.6 | 6 | 24 |
MC74LCX138DTR2G | 1 | 2 | 3.6 | 6 | 24 |
NLV74LCX138DR2G | 1 | 2 | 3.6 | 6 | 24 |