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MC74VHCT244A 데이터시트(PDF) 1 Page - ON Semiconductor |
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MC74VHCT244A 데이터시트(HTML) 1 Page - ON Semiconductor |
1 / 6 page MOTOROLA SEMICONDUCTOR TECHNICAL DATA 1 REV 0 © Motorola, Inc. 1997 6/97 Octal Bus Buffer/Line Driver with 3-State Outputs The MC74VHCT244A 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 MC74VHCT244A 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 VHCT inputs are compatible with TTL levels. This device can be used as a level converter for interfacing 3.3V to 5.0V, because it has full 5V CMOS level output swings. The VHCT244A input and output (when disabled) structures provide protection when voltages between 0V and 5.5V are applied, regardless of the supply voltage. These input and output structures help prevent device destruction caused by supply voltage – input/output voltage mismatch, battery backup, hot insertion, etc. • High Speed: tPD = 5.6ns (Typ) at VCC = 5V • Low Power Dissipation: ICC = 4µA (Max) at TA = 25°C • TTL–Compatible Inputs: VIL = 0.8V; VIH = 2.0V • Power Down Protection Provided on Inputs and Outputs • Balanced Propagation Delays • Designed for 4.5V to 5.5V Operating Range • Low Noise: VOLP = 1.1V (Max) • Pin and Function Compatible with Other Standard Logic Families • Latchup Performance Exceeds 300mA • ESD Performance: HBM > 2000V; Machine Model > 200V • Chip Complexity: 112 FETs or 28 Equivalent Gates LOGIC DIAGRAM DATA INPUTS A1 A2 A3 A4 B1 B2 B3 B4 17 15 13 11 8 6 4 218 16 14 12 9 7 5 3 YB4 YB3 YB2 YB1 YA4 YA3 YA2 YA1 NONINVERTING OUTPUTS OUTPUT ENABLES OEA OEB 1 19 MC74VHCT244A PIN ASSIGNMENT A3 A2 YB4 A1 OEA GND YB1 A4 YB2 YB3 5 4 3 2 1 10 9 8 7 6 14 15 16 17 18 19 20 11 12 13 YA2 B4 YA1 OEB VCC B1 YA4 B2 YA3 B3 DW SUFFIX 20–LEAD SOIC PACKAGE CASE 751D–04 ORDERING INFORMATION MC74VHCTXXXADW MC74VHCTXXXADT MC74VHCTXXXAM SOIC TSSOP SOIC EIAJ DT SUFFIX 20–LEAD TSSOP PACKAGE CASE 948E–02 M SUFFIX 20–LEAD SOIC EIAJ PACKAGE CASE 967–01 OEA, OEB A, B YA, YB L L H L H X L H Z INPUTS OUTPUTS FUNCTION TABLE |
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