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MC74VHCT257ADTG Folha de dados(PDF) 1 Page - ON Semiconductor |
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MC74VHCT257ADTG Folha de dados(HTML) 1 Page - ON Semiconductor |
1 / 7 page © Semiconductor Components Industries, LLC, 2014 October, 2014 − Rev. 7 1 Publication Order Number: MC74VHCT257A/D MC74VHCT257A Quad 2-Channel Multiplexer with 3-State Outputs The MC74VHCT257A is an advanced high speed CMOS quad 2−channel multiplexer fabricated with silicon gate CMOS technology. It achieves high speed operation similar to equivalent Bipolar Schottky TTL while maintaining CMOS low power dissipation. It consists of four 2−input digital multiplexers with common select (S) and enable (OE) inputs. When (OE) is held High, selection of data is inhibited and all the outputs go Low. The select decoding determines whether the A or B inputs get routed to the corresponding Y outputs. The VHCT inputs are compatible with TTL levels. This device can be used as a level converter for interfacing 3.3 V to 5.0 V because it has full 5.0 V CMOS level output swings. The VHCT257A input structures provide protection when voltages between 0 V and 5.5 V are applied, regardless of the supply voltage. The output structures also provide protection when VCC = 0 V. These input and output structures help prevent device destruction caused by supply voltage−input/output voltage mismatch, battery backup, hot insertion, etc. The internal circuit is composed of three stages, including a buffered output which provides high noise immunity and stable output. The inputs tolerate voltages up to 7.0 V, allowing the interface of 5.0 V systems to 3.0 V systems. Features • High Speed: tPD = 4.1 ns (Typ) at VCC = 5.0 V • Low Power Dissipation: ICC = 4.0 mA (Max) at TA = 25°C • TTL−Compatible Inputs: VIL = 0.8 V; VIH = 2.0 V • Power Down Protection Provided on Inputs and Outputs • Balanced Propagation Delays • Designed for 2.0 V to 5.5 V Operating Range • Low Noise: VOLP = 0.8 V (Max) • Pin and Function Compatible with Other Standard Logic Families • Latchup Performance Exceeds 300 mA • ESD Performance: Human Body Model > 2000 V; Machine Model > 200 V • These Devices are Pb−Free and are RoHS Compliant MARKING DIAGRAMS TSSOP−16 DT SUFFIX CASE 948F SOIC−16 D SUFFIX CASE 751B See detailed ordering and shipping information in the package dimensions section on page 5 of this data sheet. ORDERING INFORMATION http://onsemi.com A = Assembly Location WL, L = Wafer Lot Y = Year WW, W = Work Week G or G = Pb−Free Package VHCT257AG AWLYWW VHCT 257A ALYW G G (Note: Microdot may be in either location) 1 1 16 1 1 16 FUNCTION TABLE OE S Y0 − Y3 A0 − A3, B0 − B3 = the levels of the respective Data−Word Inputs. H L L X L H Z A0 − A3 B0 − B3 Inputs Outputs |
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