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TUSB8044AI 数据表(PDF) 49 Page - Texas Instruments |
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TUSB8044AI 数据表(HTML) 49 Page - Texas Instruments |
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49 / 63 page  VBUS 1 D- 2 D+ 3 GND 4 SSRX- 5 SSRX+ 6 GND_DRAIN 7 SSTX- 8 SSTX+ 9 SHIELD S1 SHIELD S2 SHIELD S3 SHIELD S4 TypeA_receptacle_Port2 USB_DP_DN2 USB_DM_DN2 USB_TXP_DN2 USB_TXM_DN2 USB_RXP_DN2 USB_RXM_DN2 PWRCT2_BATEN2 OVERCUR2z 3P3V USB_RXP_DN2 USB_RXM_DN2 0.1uF C13 0.1uF C14 GND 0.1uF C16 0.001uF C15 1M R4 GND USB_TXP_DN2 USB_TXM_DN2 220 ohm FB1 DN2_VBUS 0.1uF C12 GND USB_SSTXP_DN2 11 USB_SSTXM_DN2 12 USB_SSRXP_DN2 14 USB_SSRXM_DN2 15 USB_DP_DN2 9 USB_DM_DN2 10 PWRCTL2/BATEN2 35 OVERCUR2 47 U1C TUSB8044ARGCR 4.7k R3 GND GND GND A1 TX1+ A2 TX1- A3 VBUS A4 CC1 A5 D+ A6 D- A7 SBU1 A8 VBUS A9 RX2- A10 RX2+ A11 GND A12 GND B1 TX2+ B2 TX2- B3 VBUS B4 CC2 B5 D+ B6 D- B7 SBU2 B8 VBUS B9 RX1- B10 RX1- B11 GND B12 Shield S1 Shield S2 Shield S3 Shield S4 Type-C receptacle Port 1 DFP_VBUS 1uF C8 DFP_TX2M DFP_TX2P DFP_RX1M DFP_RX1P DFP_CC1 DFP_CC1 DFP_CC2 DFP_TX1M DFP_TX1P DFP_RX2M DFP_RX2P DFP_DM DFP_DP DFP_VBUS DFP_CC2 DFP_DM DFP_DP DFP_DP DFP_DM DFP_TXP DFP_TXM DFP_RXP DFP_RXM DFP_TXP DFP_TXM DFP_RXP DFP_RXM SS_SEL_DP DFP_TX1P DFP_TX1N DFP_TX2P DFP_TX2M DFP_RX1P DFP_RX1M DFP_RX2P DFP_RX2M 4.7k R3 3P3V SS MUX SS MUX U2 0.1uF C4 0.1uF C5 0.1uF C6 0.1uF C7 OVERCUR1z PWRCT1_BATEN1 USB_SSTXP_DN1 3 USB_SSTXM_DN1 4 USB_SSRXP_DN1 6 USB_SSRXM_DN1 7 USB_DP_DN1 1 USB_DM_DN1 2 PWRCTL1/BATEN1 36 OVERCUR1 46 U1B TUSB8044ARGCR 49 TUSB8044A www.ti.com SLLSF92 – FEBRUARY 2019 Product Folder Links: TUSB8044A Submit Documentation Feedback Copyright © 2019, Texas Instruments Incorporated 9.2.1.2.2 Downstream Port 1 Implementation The downstream port 1 of the TUSB8044A is connected to a USB Type-C receptacle. With BATEN1 pin pulled up, Battery Charge support is enabled for Port 1. If Battery Charge support is not needed, then pull-up resistor on BATEN1 should be uninstalled. A 1:2 MUX passive MUX is used to route the hub downstream port's super speed signals to the appropriate location on the USB Type-C receptacle. The MUX orientation is controlled by the PD controller through the SEL signal. A example 1:2 passive MUX that could be used is the Texas Instrument's HD3SS3212. Figure 38. Downstream Port 1 Implementation 9.2.1.2.3 Downstream Port 2 Implementation The downstream port 2 of the TUSB8044A is connected to a USB3 Type A connector. With BATEN2 pin pulled up, Battery Charge support is enabled for Port 2. If Battery Charge support is not needed, then pull-up resistor on BATEN2 should be uninstalled. For ferrite bead used on the VBUS connection, a lower resistance is recommended due to noticeable IR drop during high current charging modes. The isolation between the Type-A connectors shield ground and signal ground pins is not required. Some applications may have better ESD/EMI performance when the grounds are shorted together. Figure 39. Downstream Port 2 Implementation |
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