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SN74AHCT245PWR Folha de dados(PDF) 8 Page - Texas Instruments |
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SN74AHCT245PWR Folha de dados(HTML) 8 Page - Texas Instruments |
8 / 32 page DIR OE A1 B1 To Seven Other Channels 1 2 19 18 SN54AHCT245, SN74AHCT245 SCLS233P – OCTOBER 1995 – REVISED JULY 2014 www.ti.com 9 Detailed Description 9.1 Overview The SNx7ACHT245 octal bus transceivers are designed for asynchronous two-way communication between data buses. The control-function implementation minimizes external timing requirements. The SNx4AHCT245 devices allow data transmission from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction– control (DIR) input. The output-enable (OE) input can be used to disable the device so that the buses effectively are isolated. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. 9.2 Functional Block Diagram Figure 3. Logic Diagram (Positive Logic) 9.3 Feature Description • VCC is optimized at 5 V • Allows up voltage translation from 3.3 V to 5 V – Inputs Accept VIH levels of 2 V • Slow edge rates minimize output ringing 9.4 Device Functional Modes Table 1. Function Table (Each Transceiver) INPUTS OPERATION OE DIR L L B data to A bus L H A data to B bus H X Isolation 8 Submit Documentation Feedback Copyright © 1995–2014, Texas Instruments Incorporated Product Folder Links: SN54AHCT245 SN74AHCT245 |
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Descrição semelhante - SN74AHCT245PWR |
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