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FT900L-R 数据表(PDF) 37 Page - Bridgetek Pte Ltd. |
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FT900L-R 数据表(HTML) 37 Page - Bridgetek Pte Ltd. |
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37 / 67 page ![]() Copyright © Bridgetek Pte Ltd 37 FT900 /1/2/3 Revision C Embedded Microcontroller Datasheet Version 1.0 Document No. BRT_000172 Clearance No.: BRT#087 Vtl Schmitt-trigger negative threshold Voltage 0.8 1.1 - V LVTTL Rpu Input pull-up resistance equivalent 40 75 190 KΩ Vin = 0V Rpd Input pull-down resistance equivalent 40 75 190 KΩ Vin = VCCIO3V3 Iin Input leakage current -10 ±1 +10 uA Vin = VCCIO3V3 or 0 Cin* Input Capacitance - 2.8 - pF VCCIO3V3 with 5V tolerance I/O Table 5-3 - Digital I/O Pin Characteristics (VCCIO3V3 = +3.3V, Standard Drive Level) Note: This parameter indicates that the pull-up resistor for the 5V tolerance I/O cells cannot reach VCCIO3V3 DC level even without DC loading current. Cin includes the cell layout capacitance and pad capacitance. DC characteristics of USB I/O cells Parameter Description Minimum Typical Maximum Units Conditions General characteristics VUSB3V3 USB power supply voltage 2.97 3.3 3.63 V Normal operation VCC1V2* USB core supply voltage 1.08 1.2 1.32 V Normal operation Input level for high speed Vhscm Voltage of high speed data signal in the common mode -50 - 500 mV - Vhssq High speed squelch detection threshold - - 100 mV Squelch is detected 150 - - mV Squelch is not detected Vhsdsc High speed disconnection detection threshold 625 - - mV Disconnection is detected - - 525 mV Disconnection is not detected Output level for high speed Vhsoi High speed idle output voltage (Differential) -10 - 10 mV - Vhsol High speed low level output voltage (Differential) -10 - 10 mV - |
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