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74VHC157 Datasheet(PDF) 1 Page - STMicroelectronics |
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74VHC157 Datasheet(HTML) 1 Page - STMicroelectronics |
1 / 12 page ![]() 1/12 November 2004 s HIGH SPEED: tPD = 4.1 ns (TYP.) at VCC = 5V s LOW POWER DISSIPATION: ICC = 4 µA (MAX.) at TA=25°C s HIGH NOISE IMMUNITY: VNIH = VNIL = 28% VCC (MIN.) s POWER DOWN PROTECTION ON INPUTS s SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 8 mA (MIN) s BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL s OPERATING VOLTAGE RANGE: VCC(OPR) = 2V to 5.5V s PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 157 s IMPROVED LATCH-UP IMMUNITY s LOW NOISE: VOLP = 0.8V (MAX.) DESCRIPTION The 74VHC157 is an advanced high-speed CMOS QUAD 2-CHANNEL MULTIPLEXER fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. It consists of four 2-input digital multiplexer with common select and strobe inputs. It is a non-inverting multiplexer. When the STROBE input is held high selection of data is inhibited and all the outputs become low. The SELECT decoding determines whether the A or B inputs get routed to their corresponding Y outputs. Power down protection is provided on all inputs and 0 to 7V can be accepted on inputs with no regard to the supply voltage. This device can be used to interface 5V to 3V. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage. 74VHC157 QUAD 2 CHANNEL MULTIPLEXER Figure 1: Pin Connection And IEC Logic Symbols Table 1: Order Codes PACKAGE T & R SOP 74VHC157MTR TSSOP 74VHC157TTR TSSOP SOP Rev. 4 |
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