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74AC157M Datasheet(PDF) 1 Page - STMicroelectronics |
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74AC157M Datasheet(HTML) 1 Page - STMicroelectronics |
1 / 9 page 74AC157 QUAD 2 CHANNEL MULTIPLEXER PRELIMINARY DATA May 1997 s HIGH SPEED: tPD = 4 ns (TYP.) at VCC =5V s LOW POWER DISSIPATION: ICC =8 µA (MAX.) at TA =25 oC s HIGH NOISE IMMUNITY: VNIH =VNIL = 28% VCC (MIN.) s 50 Ω TRANSMISSION LINE DRIVING CAPABILITY s SYMMETRICAL OUTPUT IMPEDANCE: |IOH|= IOL =24 mA (MIN) s BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL s OPERATING VOLTAGE RANGE: VCC (OPR) = 2V to 6V s PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 157 s IMPROVED LATCH-UP IMMUNITY DESCRIPTION The AC157 is an high-speed CMOS QUAD 2-CHANNEL MULTIPLEXER fabricated with sub-micron silicon gate and double-layer metal wiring C 2MOS technology. It is ideal for low power applications maintaining high speed operation similar to equivalent Bipolar Schottky TTL. It consists of four 2-input digital multiplexers with common select and strobe inputs. It is a non-inverting multiplexer. When the STROBE input is held high selection of data is inhibit and all the outputs become low. The SELECT decoding determines whether the A or B inputs get routed to their corresponding Y outputs. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage. PIN CONNECTION AND IEC LOGIC SYMBOLS M (Micro Package) B (Plastic Package) ORDER CODES : 74AC157B 74AC157M 1/9 |
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