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USB334X 数据表(PDF) 17 Page - Microchip Technology |
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USB334X 数据表(HTML) 17 Page - Microchip Technology |
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17 / 92 page ![]() 2009-2018 Microchip Technology Inc. DS00002646A-page 17 USB334x Note 4-4 REFCLK does not need to be aligned in any way to the ULPI signals. 4.4 Digital IO Pins Note: CLoad = 10pF TABLE 4-5: DIGITAL IO CHARACTERISTICS: RESETB, STP, DIR, NXT, DATA[7:0], AND REFCLK PINS Parameter Symbol Conditions MIN TYP MAX Units Low-Level Input Voltage (USB3341, USB3346, and USB3347) VIL VSS 0.4 * VDD18 V Low-Level Input Voltage (USB3343) VIL VSS 0.8 V High-Level Input Voltage (USB3341, USB3346, and USB3347) VIH 0.68 * VDD18 VDD18 V High-Level Input Voltage (USB3343) VIH 0.68 * VDDIO VDDIO V High-Level Input Voltage REFCLK and RESETB (USB3341, USB3346, and USB3347) VIH_REF 0.68 * VDD18 VDD33 V High-Level Input Voltage REFCLK and RESETB (USB3343) VIH_REF 0.68 * VDDIO VDD33 V Low-Level Output Voltage VOL IOL = 8mA 0.4 V High-Level Output Voltage (USB3341, USB3346, and USB3347) VOH IOH = -8mA VDD18 - 0.4 V High-Level Output Voltage (USB3343) VOH IOH = -8mA VDDIO- 0.4 V Output rise time TIORISE CLOAD = 10pF 1.19 nS Output fall time TIOFALL CLOAD = 10pF 1.56 nS Input Leakage Current ILI ±10 uA Pin Capacitance Cpin 4 pF STP pull-up resistance RSTP InterfaceProtectDisable = 0 55 67 80 kΩ DATA[7:0] pull-down resistance RDATA_PD ULPI Synchronous Mode 55 67 77 kΩ CLKOUT External Drive (USB3341, USB3346, and USB3347) VIH_ED At start-up or following reset 0.4 * VDD18 V CLKOUT External Drive (USB3343) VIH_ED At start-up or following reset 0.4 * VDDIO V |
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