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SN74CBT3244 数据表(PDF) 8 Page - Texas Instruments |
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SN74CBT3244 数据表(HTML) 8 Page - Texas Instruments |
8 / 31 page 3 12 18 8 11 2 Bus Controller ron ron 1 1OE 1A1 1A4 8 1A2 1A3 Device 8 ron ron 19 17 2OE 2A1 2A4 2A2 2A3 1B1 1B4 1B2 1B3 2B1 2B4 9 2B2 2B3 20 10 0.1uF VCC Gnd SN74CBT3244 SCDS001O – NOVEMBER 1992 – REVISED SEPTEMBER 2015 www.ti.com 9 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 9.1 Application Information The SN74CBT3244 device can be used to control up to 4 bits with 2 channels simultaneously. The application shown in Figure 4 is a 8-bit bus being controlled. The OE pins are used to control the chip from the bus controller. This is a generic example and can apply to many situations. If an application requires fewer than 8 bits, ensure that the A side is tied either high or low on unused channels. 9.2 Typical Application Figure 4. Typical Application 9.2.1 Design Requirements A 0.1-µF bypass capacitor should be placed between each VCC pin and GND. Each capacitor should be placed as close as possible to the SN74CBT3244 device. 9.2.2 Detailed Design Procedure 1. Recommended input conditions: – For specified high and low levels, see VIH and VIL in Electrical Characteristics – Inputs and outputs are overvoltage tolerant, which allows them to go as high as 5.5 V at any valid VCC 2. Recommended output conditions: – Load currents must not exceed ±64 mA per channel 3. Frequency selection criterion: – Added trace resistance or capacitance can reduce maximum frequency capability; use layout practices as directed in Layout Guidelines 8 Submit Documentation Feedback Copyright © 1992–2015, Texas Instruments Incorporated Product Folder Links: SN74CBT3244 |
类似零件编号 - SN74CBT3244_15 |
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类似说明 - SN74CBT3244_15 |
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