器件名称:
MC74F657ADW/BDW
功能描述:
OCTAL BIDIRECTIONAL TRANSCEIVER WITH 8-BIT PARITY GENERATOR CHECKER (3-STATE OUTPUTS)
文件大小:
213.64KB 共7页
简 介:
MC74F657A,B OCTAL BIDIRECTIONAL TRANSCEIVER WITH 8-BIT PARITY GENERATOR CHECKER (3-STATE OUTPUTS) The MC74F657A and MC74F657B are Octal Bidirectional Transceivers with an 8-bit parity Generator/Checker and 3-state outputs. The A and B options are faster versions of the F657 and contain eight noninverting buffers with 3-state outputs and an 8-bit parity generator/checker. These devices are intended for bus-oriented applications. The buffers have a guaranteed current sinking capability of 24 mA at the A ports and 64 mA at the B ports. The Transmit/Receiver (T/R) input determines the direction of the data flow through the bidirectional transceivers. Transmit (active HIGH) enables data from A ports to B ports; Receive (active LOW) enables data from B ports to A ports. High-Impedance NPN Base Input for Reduced Loading (20 A in HIGH and LOW States) Ideal in Applications Where High Output Drive and Light Bus Loading are Required (IIL is 20 A versus Fast std of 600 A) Combines F245 and F280A Functions in One Package 3-State Outputs B Outputs, PARITY, ERROR, Sink 64 mA and Source 15 mA 15 mA Source Current Input Diodes for Termination Effects Glitchless Outputs During Power Up and Power Down High Impedance Outputs During Power Off ESD Protection > 4000 Volts PIN ASSIGNMENT OE B 0 23 B 1 22 B 2 21 B 3 20 GND GND B 4 17 B 5 16 B 6 15 B 7 14 PARITY OCTAL BIDIRECTIONAL TRANSCEIVER WITH 8-BIT PARITY GENERATOR CHECKER (3-STATE OUTPUTS) FAST SCHOTTKY TTL 24 1 J SUFFIX CERAMIC CA……
