THVD1452DGSR - 3.3-5V RS-485 Transceiver, 50Mbps, ±18kV ESD | TI
MPN: THVD1452DGSR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.66 | $16.60 |
| 100 | $1.48 | $148.00 |
| 500 | $1.32 | $660.00 |
| 1,000 | $1.18 | $1,180.00 |
THVD1452DGSR Overview
An RS-485 transceiver is a differential line driver/receiver IC that converts single-ended logic-level signals (UART, SPI, or general-purpose GPIO) into robust differential signaling on twisted-pair cables, enabling reliable communication over long distances (up to 1200 m at lower data rates) in electrically noisy industrial environments. RS-485 belongs to the TIA/EIA-485 family of standards and is one of the most widely used physical layers in industrial automation, building automation, and process-control networks.
Key features include ±18-kV IEC 61000-4-2 air-gap ESD on the bus pins (with HBM ESD also exceeding typical RS-485 levels), 1/8 unit-load support for up to 256 nodes on the bus, glitch-free power-up/power-down to avoid bus contention, and wide bus-pin common-mode range that survives ground potential differences between nodes. The device draws a low quiescent current in standby and offers thermal shutdown protection. The 10-pin VSSOP (DGS) package is thermally enhanced and footprint-compatible with the wider THVD14xx family, enabling a single PCB layout to support pin-compatible device variants of different data rates or enable schemes.
Architecture is built on a BiCMOS process that combines the high drive strength of bipolar outputs with the low power consumption of CMOS logic, achieving < 1 mA quiescent current when both driver and receiver are disabled. The internal differential driver maintains the TIA/EIA-485-2017 minimum 1.5 V differential output over a 54 Ω load, while the receiver's wide input common-mode range tolerates ground shifts in large bus installations.
Typical applications include factory automation networks (Modbus, PROFIBUS), solar inverter communications, HVAC building controls, grid infrastructure metering, and any 3.3-V or 5-V microcontroller needing a robust differential communication port. Industrial 24-V PLC backplanes and motor-drive feedback links also benefit from the part's high noise immunity.
When designing with this device, terminate the bus with 120 Ω resistors at both ends (matched to the characteristic impedance of the twisted pair), place 100 nF decoupling capacitors as close as possible to the VCC pin, and use series fail-safe biasing resistors only if the master/slave node count or cable capacitance makes true fail-safe bias impractical.
This page synthesizes distributor pricing, parametric comparison against the broader THVD14xx family and pin-compatible competitors (MAX3485, ISL3179, LTC2855 families), and practical layout guidance beyond the manufacturer datasheet.
Drop-in alternatives for THVD1452DGSR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
THVD1452DGSTR
✅ Drop-In📋 Reference alternative (not in catalog)
THVD1452DGSRQ1
✅ Drop-In📋 Reference alternative (not in catalog)
THVD1451DGSR
✅ Drop-In📋 Reference alternative (not in catalog)
THVD1450DGSR
✅ Drop-In📋 Reference alternative (not in catalog)
THVD1410DGSR
✅ Drop-In📋 Reference alternative (not in catalog)
SN65HVD485EDGSR
✅ Drop-In📋 Reference alternative (not in catalog)
THVD1452DGSR Specifications
| Type | RS-485/RS-422 Transceiver |
| Protocol | RS-485, RS-422 |
| Number of Drivers/Receivers | 1/1 |
| Duplex | Full-duplex |
| Supply Voltage (VCC) | 3 V to 5.5 V |
| Maximum Data Rate | 50 Mbps |
| IEC ESD Protection (Bus Pins) | ±18 kV air-gap (IEC 61000-4-2) |
| Driver Enable (DE) | Active-high |
| Receiver Enable (RE) | Active-low |
| Bus Common-Mode Range | -7 V to +12 V (typ.) |
| Unit Load | 1/8 unit load (up to 256 nodes) |
| Operating Temperature Range | -40°C to +125°C |
| Package | 10-pin VSSOP (DGS) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (260°C, unlimited floor life) |
| RoHS Status | Compliant |
THVD1452DGSR Pin Configuration
| Pin 1 | RO — Receiver output (logic-level) |
| Pin 2 | RE — Receiver enable, active-low (low = enabled, high = disabled) |
| Pin 3 | DE — Driver enable, active-high (high = enabled, low = high-Z) |
| Pin 4 | GND — Ground |
| Pin 5 | A — Non-inverting driver output / non-inverting receiver input |
| Pin 6 | B — Inverting driver output / inverting receiver input |
| Pin 7 | VCC — Supply voltage (3 V to 5.5 V) |
| Pin 8 | Y — Non-inverting driver output (full-duplex) |
| Pin 9 | Z — Inverting driver output (full-duplex) |
| Pin 10 | NC — Not connected (per datasheet) |
Typical Applications
THVD1452DGSR is suitable for 6 applications: Industrial Factory Automation Networks, Solar Inverter Communications, Building Automation (HVAC, Lighting, Access Control), Grid Infrastructure Metering, Point-of-Sale Terminals and Receipt Printers, Motor-Drive Feedback and Encoder Links.
Industrial Factory Automation Networks
Factory-floor RS-485 links (Modbus RTU, PROFIBUS-DP) take advantage of the THVD1452DGSR's ±18-kV IEC 61000-4-2 ESD on bus pins and -7 V to +12 V common-mode range. Per the TI THVD14xx datasheet, the 50-Mbps data rate suits fast PLC backplanes and motor-drive feedback chains; the 1/8 unit load lets up to 256 inverters, sensors, or actuators share the bus. Place 120 Ω termination at each bus end and use shielded twisted pair for noise rejection.
Recommended
Solar Inverter Communications
String inverters and module-level monitoring use RS-485 to daisy-chain PV panels back to the data logger. The THVD1452DGSR's 3 V to 5.5 V supply range matches both 3.3-V inverter MCUs and legacy 5-V aggregators, and its ±18-kV ESD survives field installation mishandling. Per TI datasheet, full-duplex operation supports full-duplex Modbus or proprietary bidirectional protocols over the same twisted pair.
Recommended
Building Automation (HVAC, Lighting, Access Control)
BACnet MS-TP and Modbus RTU buses running HVAC controllers, lighting ballasts, and access-control panels benefit from the THVD1452DGSR's wide common-mode tolerance and ±18-kV IEC ESD for cable plant reliability. The -40 °C to +125 °C operating range handles attic and rooftop enclosures. Per TI THVD14xx datasheet, the 50-Mbps rate also carries future firmware upgrade headroom in well over-spec'd BMS backbones.
Recommended
Grid Infrastructure Metering
Smart electricity, water, and gas meters cluster on RS-485 trunks back to a neighborhood concentrator. The THVD1452DGSR's 1/8 unit load supports up to 256 meters per trunk without repeaters, and its ±18-kV ESD withstands surge transients from outdoor wiring. Per TI THVD14xx datasheet, the 1/8 unit load combined with low quiescent current in disable mode is ideal for battery-metered nodes that sleep most of the time.
Recommended
Point-of-Sale Terminals and Receipt Printers
POS peripherals (bar-code scanners, receipt printers, customer displays) daisy-chain via RS-485 in long retail aisles. The THVD1452DGSR's 50-Mbps speed grade keeps latency negligible even with 32 nodes polling simultaneously, and ±18-kV IEC ESD prevents field failures from static discharge when cashiers hot-plug peripherals. Per the TI datasheet, the 10-pin VSSOP footprint fits behind compact retail display housings.
Recommended
Motor-Drive Feedback and Encoder Links
Servo drives close the loop over RS-485 to read encoder positions, torque references, and diagnostic telemetry from remote motor nodes. The THVD1452DGSR's full-duplex path enables simultaneous encoder read-back and command write, while the ±18-kV IEC ESD survives the switching-noise environment of the inverter stage. Per TI THVD14xx datasheet, the wide common-mode tolerance handles the GND shift between drive and motor.
Recommended
Recommended Products Summary
Engineering reference data for THVD1452DGSR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | THVD1452DGSTR | THVD1452DGSRQ1 | THVD1451DGSR | THVD1450DGSR | SN65HVD485EDGSR |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 10-pin VSSOP (DGS) | 10-pin VSSOP (DGS) - same | 10-pin VSSOP (DGS) - same | 10-pin VSSOP (DGS) - same | 10-pin VSSOP (DGS) - same | 10-pin VSSOP (DGS) - same |
| Maximum Data Rate | 50 Mbps | 50 Mbps | 50 Mbps | 50 Mbps | 500 kbps | 10 Mbps |
| Supply Voltage | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V | 4.5 V to 5.5 V (5 V only) |
| Duplex | Full-duplex | Full-duplex | Full-duplex | Full-duplex | Full-duplex | Half-duplex |
| Driver/Receiver Enable Pins | DE (active-high), RE (active-low) | DE + RE | DE + RE | No enable pins (always on) | DE (active-high) | DE + RE |
| Automotive Grade (AEC-Q100) | No | No | Yes | No | No | No |
Key Differentiators
- ±18-kV IEC 61000-4-2 air-gap ESD on bus pins (vs MAX3485ESA)
- 1/8 unit load supports up to 256 nodes per bus (vs SN65HVD485EDGSR)
- 3.3 V to 5 V supply range with 50 Mbps speed grade (vs THVD1450DGSR)
Design Notes
Place a 100 nF (X7R) decoupling capacitor as close as possible to the VCC pin (pin 7 on the VSSOP-10 / DGS package). For long RS-485 cables carrying fast edges, add a 10 µF bulk capacitor to handle transient supply currents during driver state changes. Per the TI THVD14xx datasheet, the VCC trace should be wide (≥ 0.3 mm) and the GND pour continuous under the IC to minimize ground bounce on the bus pins.
Route the differential bus pair (A/B and Y/Z) as a 100 Ω-120 Ω characteristic-impedance controlled-impedance microstrip, keeping the two traces matched within 0.5 mm of length. Per the TI THVD14xx datasheet, place 120 Ω termination resistors at the two physical ends of the bus only - never mid-bus. Keep the bus traces away from switching power nodes; a 0.5 mm GND guard trace between the bus and adjacent signals dramatically improves noise immunity.
Do not leave DE floating - if unused, tie DE high to VCC through a 100 kΩ pull-up to keep the driver always enabled. Similarly tie RE low to GND through a 100 kΩ pull-down if the receiver is always needed. Per the TI THVD14xx datasheet, a floating DE can latch the driver into an indeterminate state at power-up and cause bus contention. Do not exceed the -7 V to +12 V bus common-mode range or the device will latch up and potentially fail.
Estimated: at 5 V supply driving a 60 Ω bus load (worst-case with parallel termination), the THVD1452DGSR can dissipate up to ~60 mA per driver edge into the bus. At 50 Mbps with 50% duty cycle, average power dissipation in the VSSOP-10 (DGS) package is around 150 mW. The VSSOP-10 θJA is approximately 200 °C/W, yielding a junction temperature rise of ~30 °C above ambient in still air - well within the 125 °C rating.
Compliance Information
RoHS and REACH compliant per TI product page. Standard part is not AEC-Q100; choose THVD1452DGSRQ1 for automotive-grade. MSL Level-1 means unlimited floor life at <260 °C reflow.
