Specifications
| Type | Description |
|---|---|
| Part Number | THVD1550 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package / Case | SOIC-8 (D), 4.90 mm x 3.91 mm |
| Interface standard | Meets or exceeds TIA/EIA-485A; RS-485/RS-422 transceiver family |
| Duplex mode | Half duplex; THVD1550 |
| Enable pins | DE, RE; THVD1550 |
| Maximum signaling rate | 50 Mbps; THVD1550 |
| Maximum bus nodes | 196; THVD1550 |
| Recommended supply voltage | 4.5 V min, 5.5 V max; operating free-air temperature range |
| Nominal supply voltage | 5 V; single-supply operation |
| Operating ambient temperature | -40°C min, 125°C max; recommended operating conditions |
| Junction temperature | -40°C min, 150°C max; recommended operating conditions |
| Recommended bus terminal input voltage | -15 V min, 15 V max; at any bus terminal |
| Recommended differential input voltage | -15 V min, 15 V max; operating free-air temperature range |
| High-level logic input voltage | 2 V min, VCC max; driver, driver enable, and receiver enable inputs |
| Low-level logic input voltage | 0 V min, 0.8 V max; driver, driver enable, and receiver enable inputs |
| Driver output current | -60 mA min, 60 mA max; recommended operating conditions |
| Receiver output current | -8 mA min, 8 mA max; recommended operating conditions |
| Differential load resistance | 54 ohm min; recommended operating conditions |
| Absolute maximum supply voltage | -0.5 V min, 7 V max; over operating free-air temperature range |
| Absolute maximum bus voltage | -18 V min, 18 V max; any bus pin A, B, Y, or Z as differential or common-mode with respect to GND |
| Absolute maximum logic input voltage | -0.3 V min, 5.7 V max; any logic pin D, DE, or RE |
| Absolute maximum receiver output current | -24 mA min, 24 mA max; receiver output |
| Storage temperature | -65°C min, 150°C max; absolute maximum ratings |
| IEC 61000-4-2 contact ESD rating | ±18000 V; bus terminals and GND |
| IEC 61000-4-2 air-gap ESD rating | ±25000 V; bus terminals and GND |
| HBM ESD rating, bus terminals and GND | ±30000 V; ANSI/ESDA/JEDEC JS-001 |
| HBM ESD rating, non-bus pins | ±8000 V; all pins except bus terminals and GND, ANSI/ESDA/JEDEC JS-001 |
| CDM ESD rating | ±1500 V; JEDEC JESD22-C101 |
| Machine model ESD rating | ±200 V; JEDEC JESD22-A115-A |
| Electrical fast transient rating | ±4000 V; IEC 61000-4-4, bus terminals |
| Driver differential output voltage magnitude | 1.5 V min, 2.7 V typ; RL=60 ohm, -15 V <= Vtest <= 15 V |
| Driver differential output voltage magnitude | 2 V min, 3 V typ; RL=100 ohm |
| Driver differential output voltage magnitude | 1.5 V min, 2.7 V typ; RL=54 ohm |
| Change in differential output voltage | -200 mV min, 200 mV max; driver electrical characteristics |
| Common-mode output voltage | 1 V min, VCC/2 typ, 3 V max; RL=54 ohm |
| Change in steady-state common-mode output voltage | -200 mV min, 200 mV max; driver electrical characteristics |
| Driver short-circuit output current | -250 mA min, 250 mA max; DE=VCC, -15 V <= VO <= 15 V |
| Bus input current | 115 uA typ, 160 uA max; THVD155x, VI=12 V, DE=0 V, VCC=0 V or 5.5 V |
| Bus input current | 150 uA typ, 200 uA max; THVD155x, VI=15 V, DE=0 V, VCC=0 V or 5.5 V |
| Bus input current | -130 uA min, -75 uA typ; THVD155x, VI=-7 V, DE=0 V, VCC=0 V or 5.5 V |
| Bus input current | -280 uA min, -180 uA typ; THVD155x, VI=-15 V, DE=0 V, VCC=0 V or 5.5 V |
| Receiver positive-going input threshold voltage | -85 mV min, -20 mV max; over common-mode range of -7 V to +12 V |
| Receiver negative-going input threshold voltage | -200 mV min, -135 mV typ; over common-mode range of -7 V to +12 V |
| Receiver positive-going input threshold voltage | -85 mV min, -20 mV max; over common-mode range of ±15 V |
| Receiver negative-going input threshold voltage | -220 mV min, -135 mV typ; over common-mode range of ±15 V |
| Receiver input hysteresis | 50 mV typ; receiver electrical characteristics |
| Receiver output high voltage | 4 V min, VCC - 0.3 V typ; IOH=-8 mA |
| Receiver output low voltage | 0.2 V typ, 0.4 V max; IOL=8 mA |
| Receiver output high-impedance current | -1 uA min, 1 uA max; VO=0 V or VCC, RE=VCC |
| Logic input current | -5 uA min, 0 uA typ, 5 uA max; D, DE, RE; 4.5 V <= VCC <= 5.5 V, 0 V <= VIN <= VCC |
| Supply current, driver and receiver enabled | 700 uA typ, 1000 uA max; RE=0 V, DE=VCC, no load |
| Supply current, driver enabled receiver disabled | 400 uA typ, 620 uA max; RE=VCC, DE=VCC, no load |
| Supply current, driver disabled receiver enabled | 400 uA typ, 630 uA max; RE=0 V, DE=0 V, no load |
| Supply current, driver and receiver disabled | 0.1 uA typ, 1 uA max; RE=VCC, DE=0 V, D=open, no load |
| Thermal shutdown temperature | 170°C typ; electrical characteristics |
| Junction-to-ambient thermal resistance | 112.4°C/W; THVD1550, D SOIC-8 package |
| Junction-to-case top thermal resistance | 62.7°C/W; THVD1550, D SOIC-8 package |
| Junction-to-board thermal resistance | 62.0°C/W; THVD1550, D SOIC-8 package |
| Power dissipation, unterminated | 350 mW; THVD155x, driver and receiver enabled, VCC=5.5 V, TA=125°C, 50% duty cycle square wave at 50 Mbps |
| Power dissipation, RS-422 load | 330 mW; THVD155x, RL=100 ohm, CL=50 pF driver, VCC=5.5 V, TA=125°C, 50% duty cycle square wave at 50 Mbps |
| Power dissipation, RS-485 load | 340 mW; THVD155x, RL=54 ohm, CL=50 pF driver, VCC=5.5 V, TA=125°C, 50% duty cycle square wave at 50 Mbps |
| Datasheet Status | request_only |
Product Overview
The THVD1550 is a Texas Instruments 5-V RS-485 transceiver in the Signal_Chain category. It is specified as a half-duplex RS-485/RS-422 transceiver family member that meets or exceeds TIA/EIA-485A, with DE and RE enable pins for driver and receiver control.
The device supports a maximum signaling rate of 50 Mbps and up to 196 bus nodes. Recommended operation covers a 4.5 V to 5.5 V supply range, -40°C to 125°C ambient temperature, and -40°C to 150°C junction temperature. Bus terminal and differential input voltages are recommended from -15 V to 15 V.
The SOIC-8 (D) package measures 4.90 mm x 3.91 mm. Thermal data for this package includes 112.4°C/W junction-to-ambient, 62.7°C/W junction-to-case top, and 62.0°C/W junction-to-board resistance. Application fit is centered on 5-V half-duplex RS-485/RS-422 links, 50 Mbps bus communication, high node-count networks, and bus interfaces requiring IEC 61000-4-2 and HBM ESD ratings from the extracted datasheet facts.
Key Features
- Meets or exceeds TIA/EIA-485A interface requirements
- Half-duplex RS-485 transceiver with DE and RE pins
- 50 Mbps maximum signaling rate for THVD1550
- Supports up to 196 bus nodes
- 4.5 V to 5.5 V recommended supply range
- -40°C to 125°C operating ambient range
- ±15 V recommended bus terminal input range
- ±18000 V IEC contact ESD on bus terminals
- ±25000 V IEC air-gap ESD on bus terminals
- 0.1 uA typical disabled supply current
Typical Applications
- Half-duplex RS-485 links
- RS-422 transceiver interfaces
- 5-V bus communication nodes
- 50 Mbps serial bus networks
- Up to 196-node bus systems
- High-ESD bus terminal designs
- -40°C to 125°C ambient operation
Procurement Notes
When requesting a quote for THVD1550, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What type of transceiver is the THVD1550?
The THVD1550 is a Texas Instruments 5-V RS-485 transceiver in the Signal_Chain category. It is specified as a half-duplex device and meets or exceeds TIA/EIA-485A for the RS-485/RS-422 transceiver family.
What supply voltage range is recommended for THVD1550?
The recommended supply range is 4.5 V minimum to 5.5 V maximum over the operating free-air temperature range. The extracted facts also identify 5 V nominal single-supply operation.
What signaling rate and bus node count are specified?
For THVD1550, the maximum signaling rate is 50 Mbps and the maximum bus node count is 196. These limits are listed for the THVD1550 half-duplex device.
What ESD ratings apply to the THVD1550 bus terminals?
For bus terminals and GND, the extracted facts list ±18000 V IEC 61000-4-2 contact ESD, ±25000 V IEC 61000-4-2 air-gap ESD, and ±30000 V HBM ESD under ANSI/ESDA/JEDEC JS-001.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.