MC74F138

MC54/74F138 1-OF-8 DECODER/ DEMULTIPLEXER The MC54/74F138 is a high speed 1-of-8 Decoder/Demultiplexer. This device is ideally suited for high speed bipolar memory chip select address decoding. The multiple input enables allow parallel expansion to a 1-of-24 decoder using just three F138 devices or to a 1-of-32 decoder using four F138s and one inverter. Demultiplexing Capability Multiple Input Enable for Easy Expansion Active Low Mutually Exclusive Outputs Input Clamp Diodes Limit High-Speed Termination Effects CONNECTION DIAGRAM DIP (TOP VIEW) VCC 16 O0 15 O1 14 O2 13 O3 12 O4 11 O5 10 O6 9 16 1 1-OF-8 DECODER/ DEMULTIPLEXER FAST™ SHOTTKY TTL J SUFFIX CERAMIC CASE 620-09 16 N SUFFIX PLASTIC CASE 648-08 1 1 A0 2 A1 3 A2 4 E1 5 E2 6 E3 7 O7 8 GND 16 1 D SUFFIX SOIC CASE 751B-03 LOGIC DIAGRAM A2 3 2 ORDERING INFORMATION VCC = PIN 16 GND = PIN 8 = PIN NUMBERS MC54FXXXJ MC74FXXXN MC74FXXXD Ceramic Plastic SOIC A1 1 A0 4 E1 E2 E3 5 6 LOGIC SYMBOL 1 2 3 456 1 2 3 A0 A1 A2 O0 O1 O2 O3 O4 O5 O6 O7 7 9 10 11 12 13 14 15 15 14 13 12 11 10 9 7 O0 VCC = PIN 16 GND = PIN 8 O7 O6 O5 O4 O3 O2 O1 FAST AND LS TTL DATA 4-53 MC54/74F138 GUARANTEED OPERATING RANGES Symbol VCC TA IOH IOL Supply Voltage Operating Ambient Temperature Range Parameter 54, 74 54 74 Output Current — High Output Current — Low 54, 74 54, 74 Min 4.5 –55 0 Typ 5.0 25 25 Max 5.5 125 70 –1.0 20 mA mA Unit V °C DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwis...