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M74HCTXXXM1R データシート(PDF) 1 Page - STMicroelectronics |
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M74HCTXXXM1R データシート(HTML) 1 Page - STMicroelectronics |
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1 / 11 page  M54HCT157/158 M74HCT157/158 April 1993 HCT158 QUAD 2 CHANNEL MULTIPLEXER (INV.) HCT157 QUAD 2 CHANNEL MULTIPLEXER B1R (Plastic Package) ORDER CODES : M54HCTXXXF1R M74HCTXXXM1R M74HCTXXXB1R M74HCTXXXC1R F1R (Ceramic Package) M1R (Micro Package) C1R (Chip Carrier) PIN CONNECTIONS (top view) NC = No Internal Connection HCT158 HCT157 DESCRIPTION . HIGH SPEED tPD = 21 ns (TYP.) AT VCC =5 V . LOW POWER DISSIPATION ICC =4 µA (MAX.) AT TA =25 °C . COMPATIBLE WITH TTL OUTPUTS VIH = 2V (MIN.) VIL = 0.8V (MAX) . OUTPUT DRIVE CAPABILITY 10 LSTTL LOADS . SYMMETRICAL OUTPUT IMPEDANCE IOH =IOL = 4 mA (MIN.) . BALANCED PROPAGATION DELAYS tPLH =tPHL . PIN AND FUNCTION COMPATIBLE WITH 54/74LS157/158 The M54/74HCT157 and the M54/74HCT158 are high speed CMOS QUAD 2-CHANNEL MULTI- PLEXERs fabricated with silicon gate C 2MOS tech- nology. They achieve the high speed operation similar to equivalent LSTTL while maintaining the CMOS low power dissipation. These devices consist of four 2-input digital multi- plexers with common select and strobe inputs. The HCT158 is an inverting multiplexer while the HCT157 is a non-inverting multiplexer. When the STROBE input is held High, selection of data is in- hibited and all the outputs become Low in the M74HCT157 and High in the M74HCT158. The SE- LECT decoding determines whether the A or B in- puts get routed to their corresponding Y outputs. All inputs are equipped with protection circuits against static discharge and transient excess voltage. M54/74HCT devices are designed to directly inter- face HSC 2MOS systems with TTL and NMOS com- ponents. They are also plug in replacements for LSTTL devices giving a reduction of power con- sumption. 1/11 |
同様の部品番号 - M74HCTXXXM1R |
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同様の説明 - M74HCTXXXM1R |
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