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SN65HVD74DGKR

3.3V RS-485 transceiver, 1Mbps, VSSOP-8

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جزء الشركة المصنعة ： جزء الشركة المصنعة

SN65HVD74DGKR

الحزمة ： الحزمة

VSSOP-8 (3.00 x 3.00 x 0.90 mm)

العلامة التجارية ： العلامة التجارية

فئات المنتجات:：فئات المنتجات

الدوائر المتكاملة الدوائر المتكاملة, واجهة ICs

توصيات أخرى قد تكون مهتماً بها.

SII9396SCNUC-BAR

IS43TR16256BL-125KBLI

الوصف

SN65HVD74DGKR Overview

The SN65HVD74DGKR is a 3.3V full-duplex RS-485 transceiver from Texas Instruments with data rates up to 20Mbps, built-in 12kV IEC ESD protection, in a VSSOP-8 package, suitable for industrial communication and motion control systems.

Key Features

Supply voltage: 3.3V
Data rate: 20Mbps
Full-duplex mode
12kV IEC ESD protection
Bus voltage range: -7V to 12V
Operating temperature: -40C to 125C

مقدمة المنتج:SN65HVD74DGKR مقدمة المنتج

The SN65HVD74DGKR is a 3.3 V RS-485/RS-422 transceiver from Texas Instruments in an 8-pin VSSOP (3.0 x 3.0 mm) package, supporting data rates up to 20 Mbps with one driver and one receiver in full-duplex configuration. It features 1/8 unit load receiver input impedance allowing up to 256 nodes on the bus, plus or minus 16 kV IEC 61000-4-2 ESD protection on the bus pins, failsafe receiver operation (guaranteed high output for open/shorted inputs), and a low 370 uA receive-mode supply current. The extended -40 C to +85 C operating temperature range supports industrial environments.

مبدأ العمل:SN65HVD74DGKR مبدأ العمل

The SN65HVD74DGKR implements a full-duplex RS-485/RS-422 transceiver with separate driver and receiver signal paths. The driver section converts single-ended CMOS logic (applied to the D input) into a differential signal on the Y and Z outputs, compliant with TIA/EIA-485-A. The driver output stage provides a minimum 1.5 V differential output across a 54 Ohm load with current limiting and thermal shutdown protection against bus contention faults. The receiver section monitors the differential voltage between the A and B inputs and outputs the corresponding logic level on the R output. Receiver hysteresis (25 mV typical) provides noise immunity. Failsafe biasing ensures the receiver output goes high when the bus is open, shorted, or terminated but undriven, preventing random noise from being interpreted as data. The driver enable (DE) and receiver enable (RE) pins allow independent direction control. With DE low and RE high, the device enters a low-power shutdown mode. The 1/8 unit load receiver input impedance (greater than 96 kOhm) allows 256 transceivers to share a single RS-485 bus without exceeding the 32 unit-load maximum defined by the standard.

وصف الدبوس:SN65HVD74DGKR تعريف الدبوس ووظائفه

دبوس	الاسم	الوصف
1	R	Receiver output; logic level corresponding to A-B differential input
2	إعادة	Receiver enable; active low, high-impedance R output when high
3	DE	Driver enable; active high, high-impedance Y/Z outputs when low
4	D	Driver input; CMOS logic level data input
5	GND	مرجع أرضي
6	Y	Driver non-inverting output; connects to RS-485 bus
7	Z	Driver inverting output; connects to RS-485 bus
8	VCC	3.3 V power supply (3.0 V to 3.6 V)

Package: VSSOP-8 (3.0 x 3.0 mm). Pin-compatible with industry-standard SN75176/SN65176 in SOIC-8 footprint with appropriate adapter.

Application Scenarios:In which products and applications isSN65HVD74DGKR مستعمل

Industrial RS-485 Networks: Multi-drop communication bus in factory automation supporting 256 nodes
Motor Drive Telemetry: Full-duplex RS-485 link between servo drive and motion controller at 20 Mbps
Building Automation: BACnet MS/TP and Modbus RTU communication over twisted-pair cabling
Grid Inverters: Isolated RS-485 communication between solar inverters and monitoring systems
Process Control: 4-20 mA loop digitizer communication over RS-485 in chemical and oil and gas plants

Alternative Models:What chips are recommended as replacements for SN65HVD74DGKR

الطراز	الشركة المصنعة	Rate	Supply	Duplex	الحزمة
SN65HVD70DR	تكساس إنسترومنتس	1 Mbps	3.3 V	Half	SOIC-8
THVD1550DR	تكساس إنسترومنتس	50 Mbps	3.3 V	Half	SOIC-8
LTC2852IMS	الأجهزة التناظرية	20 Mbps	3.3 V	Full	MSOP-10
ADM3485EARZ	الأجهزة التناظرية	12 Mbps	3.3 V	Half	SOIC-8
ISL3179EIHZ	رينيساس	40 Mbps	3.3 V	Full	QSOP-16

SN65HVD74DGKR is a 3.3V 20Mbps RS-485 full-duplex transceiver from TI in VSSOP-8 (3x3mm) with ±30kV HBM ESD and ±12kV IEC ESD. The SN65HVD70DR provides half-duplex operation. SN65HVD75 offers 1Mbps lower-speed option. THVD1550 is the newer TI RS-485 family with up to 50Mbps data rates. For 5V operation, SN65HVD23 provides 25Mbps with ±16kV IEC ESD. ADM3483ARZ from ADI is a 3.3V half-duplex alternative with 12Mbps data rate.