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MC74HCXXXAN bảng dữ liệu(PDF) 1 Page - Motorola, Inc |
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MC74HCXXXAN bảng dữ liệu(HTML) 1 Page - Motorola, Inc |
1 / 6 page MOTOROLA SEMICONDUCTOR TECHNICAL DATA 1 REV 6 © Motorola, Inc. 1995 10/95 Octal 3-State Noninverting Bus Transceiver High–Performance Silicon–Gate CMOS The MC54/74HC245A is identical in pinout to the LS245. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs. The HC245A is a 3–state noninverting transceiver that is used for 2–way asynchronous communication between data buses. The device has an active–low Output Enable pin, which is used to place the I/O ports into high–impedance states. The Direction control determines whether data flows from A to B or from B to A. • Output Drive Capability: 15 LSTTL Loads • Outputs Directly Interface to CMOS, NMOS, and TTL • Operating Voltage Range: 2 to 6 V • Low Input Current: 1 µA • High Noise Immunity Characteristic of CMOS Devices • In Compliance with the Requirements Defined by JEDEC Standard No. 7A • Chip Complexity: 308 FETs or 77 Equivalent Gates LOGIC DIAGRAM A DATA PORT A8 A7 A6 A5 A3 A4 A2 A1 9 8 7 6 5 4 3 2 DIRECTION OUTPUT ENABLE 1 19 PIN 10 = GND PIN 20 = VCC 18 17 16 15 14 13 12 11 B1 B2 B3 B4 B5 B6 B7 B8 B DATA PORT FUNCTION TABLE Control Inputs Operation Output Enable Direction Operation L L Data Transmitted from Bus B to Bus A L H Data Transmitted from Bus A to Bus B H X Buses Isolated (High–Impedance State) X = don’t care MC54/74HC245A PIN ASSIGNMENT A5 A3 A2 A1 DIRECTION GND A8 A7 A6 A4 5 4 3 2 1 10 9 8 7 6 14 15 16 17 18 19 20 11 12 13 B3 B2 B1 OUTPUT ENABLE VCC B8 B7 B6 B5 B4 DW SUFFIX SOIC PACKAGE CASE 751D–04 N SUFFIX PLASTIC PACKAGE CASE 738–03 ORDERING INFORMATION MC54HCXXXAJ MC74HCXXXAN MC74HCXXXADW Ceramic Plastic SOIC J SUFFIX CERAMIC PACKAGE CASE 732–03 1 20 1 20 1 20 |
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