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SN74AVC2T45DCTT Datenblatt(PDF) 9 Page - Texas Instruments |
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SN74AVC2T45DCTT Datenblatt(HTML) 9 Page - Texas Instruments |
9 / 21 page www.ti.com Power-Up Considerations SN74AVC2T45 DUAL-BIT DUAL-SUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS SCES531F – DECEMBER 2003 – REVISED MAY 2005 A proper power-up sequence always should be followed to avoid excessive supply current, bus contention, oscillations, or other anomalies. To guard against such power-up problems, take the following precautions: 1. Connect ground before any supply voltage is applied. 2. Power up VCCA. 3. VCCB can be ramped up along with or after VCCA. Table 1. Typical Total Static Power Consumption (ICCA + ICCB) VCCA VCCB UNIT 0 V 1.2 V 1.5 V 1.8 V 2.5 V 3.3 V 0 V 0 <0.5 <0.5 <0.5 <0.5 <0.5 1.2 V <0.5 <1 <1 <1 <1 1 1.5 V <0.5 <1 <1 <1 <1 1 µA 1.8 V <0.5 <1 <1 <1 <1 <1 2.5 V <0.5 1 <1 <1 <1 <1 3.3 V <0.5 1 <1 <1 <1 <1 9 |
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