器件名称:
MC74VHC257D
功能描述:
Quad 2-Channel Multiplexer with 3-State Outputs
文件大小:
95.38KB 共8页
简 介:
MC74VHC257 Quad 2Channel Multiplexer with 3State Outputs The MC74VHC257 is an advanced high speed CMOS quad 2channel 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 2input 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 inputs tolerate voltages up to 7 V, allowing the interface of 5 V systems to 3 V systems. http://onsemi.com MARKING DIAGRAMS 16 SO16 D SUFFIX CASE 751B VHC257 AWLYWW 1 8 9 High Speed: tPD = 4.1 ns (Typ) at VCC = 5.0 V Low Power Dissipation: ICC = 4.0 mA (Max) at TA = 25°C High Noise Immunity: VNIH = VNIL = 28% VCC Power Down Protection Provided on Inputs 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: HBM > 2000 V; Machine Model > 200 V Chip Complexity: FETs = 100; Equivalent Gates = 25 16 9 VHC257 ALYW TSSOP16 DT SUFFIX CASE 948F 1 8 16 9 S A0 B0 Y0 A1 B1 Y1 GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC OE A3 B3 Y3 A2 B2 Y2 EIAJ SO16 M SUFFIX CASE 966 A L, WL Y W, WW = = = = VHC257 ALYW 1 8 Assembly Location Wafer……
