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SN65HVD102 Datasheet(PDF) 11 Page - Texas Instruments |
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SN65HVD102 Datasheet(HTML) 11 Page - Texas Instruments |
11 / 30 page T > TSD CQ @ ILIM for tWU1 < t < tWU2 and RX TX Wake WAKE = L CUR_OK = Z Driver = ON Receive Only CUR_OK = Z WAKE = Z Driver = OFF Receive and Transmit CUR_OK = Z WAKE = Z Driver = ON Current Fault WAKE = Z CUR_OK = L Driver = ON Thermal Shutdown CUR_OK = Z WAKE = Z Driver = OFF EN EN * CQ @ ILIM for t > t WU 2 EN * T > TSD SN65HVD101, SN65HVD102 www.ti.com SLLSE84B – MAY 2011 – REVISED APRIL 2015 Feature Description (continued) 9.3.3 Active Current Limit Condition: VTHL > VCQ ≥ VTHH If the output current at CQ remains at the internally set current limit IO(LIM) for a duration longer than a wake-up pulse (longer than 80 μs), the CUR_OK pin is driven logic low, indicating an over-current condition. The CUR_OK pin returns to the high-impedance (inactive) state when the CQ pin is no longer in a current limit condition. The state diagram shown in Figure 9 illustrates the various states; and, under what conditions the device transitions from one state to another. 9.3.4 Inactive Current Limit Condition: VTHL < VCQ < VTHH If the voltage at CQ is between the upper and lower receiver input threshold, CUR_OK remains high-impedance. Figure 9. State Diagram of Device Transceiver 9.3.5 Over-temperature Detection If the transceiver’s internal temperature exceeds its over-temperature threshold θTSD, the CQ driver and the voltage regulator (HVD101) are disabled. As soon as the temperature drops below the temperature threshold, the internal circuit re-enables the voltage regulator (HVD101) and the driver, subject to the state of the EN and TX pins. 9.3.6 CQ Current-limit Adjustment The CQ driver current-limit is determined by the external resistor, RSET, at the ILIM_ADJ pin. Figure 2 shows the typical current-limit characteristics as a function of RSET. Copyright © 2011–2015, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: SN65HVD101 SN65HVD102 |
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