THVD2452VDREP datasheet(25/40 Pages) TI

Part #	THVD2452VDREP

Description	THVD24xxV-EP Enhanced 3V to 5.5V RS-485 Transceivers With 1.8V VIO Capability

PDF	40 Pages

Scroll/Zoom	100%

Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

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25 / 40 page

8.2.2 Detailed Design Procedure

Figure 8-6 suggests a protection circuit against 1kV surge (IEC 61000-4-5) transients. Table 8-1 shows the

associated bill of materials. SMAJ30CA TVS diodes are rated to operate up to 30V. This makes sure the

protection diodes do not conduct if a direct RS-485 bus shorts to 24V DC industrial power rail.

3.3V ± 5 V

RxD

TxD

DIR

MCU/

UART

10k

100nF

DIR

10k

/RE

GND

THVD24x0

TVS

Figure 8-6. Transient Protection Against Surge Transients for Half-Duplex Devices

Table 8-1. Components List

DEVICE

FUNCTION

ORDER NUMBER

MANUFACTURER(1)

XCVR

RS-485 transceiver

THVD2410V-EP

Or THVD2450V-EP

TVS

Bidirectional 400-W transient suppressor

SMAJ30CA

Littelfuse

(1)

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THVD2410V-EP, THVD2450V-EP, THVD2452V-EP

SLLSFQ9B – MAY 2024 – REVISED OCTOBER 2024

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THVD2452VDREP Datasheet(PDF) 25 Page - Texas Instruments