器件名称:
MC74VHC244M
功能描述:
Octal Bus Buffer
文件大小:
165.03KB 共6页
简 介:
MOTOROLA SEMICONDUCTOR TECHNICAL DATA Octal Bus Buffer The MC74VHC244 is an advanced high speed CMOS octal bus buffer fabricated with silicon gate CMOS technology. It achieves high speed operation similar to equivalent Bipolar Schottky TTL while maintaining CMOS low power dissipation. The MC74VHC244 is a noninverting 3–state buffer, and has two active–low output enables. This device is designed to be used with 3–state memory address drivers, etc. The internal circuit is composed of three stages, including a buffer output which provides high noise immunity and stable output. The inputs tolerate voltages up to 7V, allowing the interface of 5V systems to 3V systems. High Speed: tPD = 3.9ns (Typ) at VCC = 5V Low Power Dissipation: ICC = 4A (Max) at TA = 25°C High Noise Immunity: VNIH = VNIL = 28% VCC Power Down Protection Provided on Inputs Balanced Propagation Delays Designed for 2V to 5.5V Operating Range Low Noise: VOLP = 0.9V (Max) Pin and Function Compatible with Other Standard Logic Families Latchup Performance Exceeds 300mA ESD Performance: HBM > 2000V; Machine Model > 200V Chip Complexity: 136 FETs or 34 Equivalent Gates LOGIC DIAGRAM A1 A2 A3 A4 DATA INPUTS B1 B2 B3 B4 2 4 6 8 11 13 15 17 18 16 14 12 9 7 5 3 YA1 YA2 YA3 MC74VHC244 DW SUFFIX 20–LEAD SOIC PACKAGE CASE 751D–04 DT SUFFIX 20–LEAD TSSOP PACKAGE CASE 948E–02 M SUFFIX 20–LEAD SOIC EIAJ PACKAGE CASE 967–01 ORDERING INFORMATION MC74VHCXXXDW SOIC MC74VHCXXXDT TSSOP MC74VHCXXXM SOIC EIAJ PIN ASSIGN……
