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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SN74AVC24T245 датащи(PDF) 21 Page - Texas Instruments |
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SN74AVC24T245 датащи(HTML) 21 Page - Texas Instruments |
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21 / 29 page  10 Power Supply Recommendations The SN74AVC24T245 device uses two separate configurable power-supply rails, VCCA and VCCB. VCCA accepts any supply voltage from 1.2 V to 3.6 V and VCCB accepts any supply voltage from 1.2 V to 3.6 V. The A port and B port are designed to track VCCA and VCCB, respectively, allowing for low-voltage bidirectional translation between any of the 1.2-V, 1.5-V, 1.8-V, 2.5-V and 3.3-V voltage nodes. The output-enable OE input circuit is designed so that it is supplied by VCCA and when the OE input is high, all outputs are placed in the high-impedance state. To ensure the high-impedance state of the outputs during power up or power down, the OE input pin must be tied to VCCA through a pullup resistor and must not be enabled until VCCA and VCCB are fully ramped and stable. The minimum value of the pullup resistor to VCCA is determined by the current-sinking capability of the driver. 11 Layout 11.1 Layout Guidelines To ensure reliability of the device, following common printed-circuit-board layout guidelines is recommended. • Bypass capacitors must be used on power supplies. • Short trace lengths must be used to avoid excessive loading. • Place pads on the signal paths for loading capacitors or pullup resistors to help adjust rise and fall times of signals, depending on the system requirements. 11.2 Layout Example 0.254mm dia. hole 0.50mm dia. solder mask opening 0.350mm Dia. Pad 0.8mm pitch 0.125mm Trace Figure 11-1. BGA Layout Example www.ti.com SN74AVC24T245 SCES552E – FEBRUARY 2004 – REVISED AUGUST 2020 Copyright © 2020 Texas Instruments Incorporated Submit Document Feedback 21 |
Аналогичный номер детали - SN74AVC24T245_V01 |
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Аналогичное описание - SN74AVC24T245_V01 |
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