Receive

Only

CUR_OK = Z

WAKE = Z

Driver is OFF

Receive and

Transmit

CUR_OK = Z

WAKE = Z

Driver is ON

EN*

EN

Wake

WAKE = L

CUR_OK = Z

Driver is ON

and RX•7;

EN*

Current

Fault

WAKE = Z

CUR_OK = L

Driver is ON

EN*

CQ at ILIM for

Thermal

Shutdown

CUR_OK =Z

WAKE = Z

Driver is OFF

T > TSD

T < TRE

CQ NOT at ILIM

T > TSD

T > TSD

T > TSD

CQ at ILIM for

SN65HVD101

SN65HVD102

www.ti.com

SLLSE84A – MAY 2011 – REVISED MARCH 2013

Figure 8. State Diagram

Over Temperature detection

If the internal temperature of the device exceeds the over-temperature threshold (

voltage regulator (HVD101) will be internally disabled. When the temperature falls below the temperature

threshold the internal circuit re-enables the voltage regulator (HVD101) and the output driver, subject to the state

of the EN and TX pins.

CQ Current Limit Adjustment

The CQ driver output current limit can be set using an external resistor on the LIMADJ pin. The current limit is

given by:

(LIMADJ is tied directly to GND) then the current limit is set to the maximum value of 400 mA.

Copyright © 2011–2013, Texas Instruments Incorporated

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