My Inquiry
My Account
Texas Instruments SN75176BDR
- Part No.:
- SN75176BDR
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN75176BDR.pdf
- Description:
- IC TRANSCEIVER HALF 1/1 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:16,129
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN75176BDR from Texas Instruments is a half-duplex RS-485/RS-422 differential bus transceiver in an 8-pin SOIC package, operating from a single 5V supply. It features ±200mV receiver input sensitivity, 12kΩ minimum receiver input impedance, ±60mA driver output capability, and thermal shutdown protection. It is designed for robust multipoint communication in industrial motor controls and remote telemetry systems.
For engineers reviewing the SN75176BDR datasheet, SN75176BDR pinout, SN75176BDR application, or SN75176BDR equivalent, this page delivers verified electrical specifications, functional pin mapping, real-world use cases in noisy environments, and validated alternative parts for RS-485 physical layer design.
Technical Context
The SN75176BDR integrates a 3-state differential line driver and a differential line receiver on a single die, both powered by 5V. Its driver uses active-high enable (DE) and receiver uses active-low enable (RE), allowing external connection for direction control in half-duplex configurations.
It supports ANSI TIA/EIA-485-A and TIA/EIA-422-B standards with wide common-mode voltage range (–7V to +12V), ±200mV input sensitivity, and 50mV typical input hysteresis - enabling reliable operation on long, noisy bus lines up to 10 Mbps with proper termination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75V to 5.25V - ensures stable operation under standard 5V rail tolerances in industrial power supplies. |
| Receiver Input Sensitivity | ±200mV - guarantees valid logic detection even with attenuated or noisy differential signals on long cables. |
| Driver Output Current | ±60mA - supports driving 54Ω or 100Ω termination loads while maintaining compliant differential voltage (≥1.5V). |
| Receiver Input Impedance | 12kΩ minimum - enables up to 32 unit loads on a single RS-485 bus without signal degradation. |
| Thermal Shutdown Threshold | ≈150°C junction temperature - protects against latch-up or damage during sustained bus fault conditions. |
| Propagation Delay (Receiver) | 21–35ns - supports data rates up to 10 Mbps in point-to-point or multidrop configurations with low timing skew. |
| Common-Mode Range | –7V to +12V - allows interoperability across devices with ground potential differences in distributed systems. |
Pinout & Package
SN75176BDR is housed in an 8-pin SOIC (D) package measuring 4.90mm × 3.91mm, with gull-wing leads and standard JEDEC MS-012AC footprint. The package supports surface-mount reflow and is rated for 0°C to +70°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| R | Receiver output | TTL-level logic output (active high when RE = low); high-impedance when RE = high. |
| RE | Receiver enable | Active-low control: disables receiver output (high-Z) when high; enables decoding of A/B differential inputs when low. |
| DE | Driver enable | Active-high control: enables driver output (A/B swing) when high; places A/B in high-Z when low. |
| D | Driver input | TTL-level logic input (0V/5V) translated to differential output on A/B pins when DE = high. |
| GND | Ground reference | Primary return path for internal circuitry and I/O biasing; must be low-impedance to minimize noise coupling. |
| A | Differential bus terminal (+) | Non-inverting bus line; outputs high when D = high & DE = high; receives positive polarity of differential signal. |
| B | Differential bus terminal (–) | Inverting bus line; outputs low when D = high & DE = high; receives negative polarity of differential signal. |
| VCC | Power supply | 5V DC input; bypass capacitor (≥1.5μF) required near pin for transient current support during switching. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional half-duplex operation | Single A/B bus port handles both transmit and receive via DE/RE control - eliminates need for separate TX/RX pairs in space-constrained nodes. |
| RS-485/RS-422 compliance | Fully meets TIA/EIA-485-A and TIA/EIA-422-B standards - ensures interoperability with legacy and modern industrial networks. |
| Thermal and current limiting | Integrated positive/negative current limiting + thermal shutdown at ~150°C - prevents destruction during short-circuit or miswiring events. |
| High noise immunity | 50mV typical input hysteresis + ±200mV sensitivity - rejects common-mode noise and EMI without external Schmitt triggers. |
| Bus-friendly high-Z state | A/B terminals present minimal loading (<1 µA) when driver disabled or VCC = 0 - enables hot-swap and fail-safe bus behavior. |
Applications
| Motor Control Systems | Industrial Weigh Scales |
|---|---|
|
Use Scenario: Bidirectional command and feedback transmission between PLC and AC induction or stepper motor drives over 100+ meter cable runs in factory-floor environments. IC Role / Device Role / Timing Role: Physical-layer transceiver converting TTL UART signals to robust RS-485 differential bus signaling. Use Value: Enables deterministic, noise-immune communication despite high dv/dt interference from variable-frequency drives and contactors. |
Use Scenario: Connecting load-cell signal conditioners and display controllers in multi-head weighing stations with shared bus architecture. IC Role / Device Role / Timing Role: Half-duplex RS-485 interface managing polling-based sensor readouts and calibration commands. Use Value: Supports up to 32 nodes per bus with 12kΩ input impedance, reducing wiring complexity and enabling centralized diagnostics. |
| Digital Signage Networks | Telecom Remote Units |
|
Use Scenario: Daisy-chained video display controllers receiving firmware updates and brightness commands across building-wide signage installations. IC Role / Device Role / Timing Role: Bus transceiver providing galvanically isolated, long-haul serial communication between master controller and edge displays. Use Value: Wide –7V to +12V common-mode range accommodates ground potential shifts between floors or zones without signal loss. |
Use Scenario: Interfacing RET (Remote Electrical Tilt) units and TMAs (Tower Mounted Amplifiers) with base station controllers over outdoor coaxial or twisted-pair links. IC Role / Device Role / Timing Role: RS-485 physical layer device handling configuration, status reporting, and fault alerts in harsh RF-rich environments. Use Value: Thermal shutdown and current limiting protect against lightning-induced surges and antenna coupling effects on exposed cabling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RS-485 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX485CSA+ | 5V-only supply; no thermal shutdown; 12kΩ input impedance; ±200mV sensitivity; SO-8 package. | Limited fault protection in high-temperature enclosures; suitable for benign indoor environments only. | Prefer SN75176BDR where bus fault resilience or extended temperature margin is required. |
| SP3485EN-L | 3.3V supply; 1/8-unit load (up to 256 nodes); ±15kV ESD protection; SO-8 package. | Designed for low-power, high-node-count systems; incompatible with 5V logic without level shifting. | Choose SP3485EN-L only when system operates at 3.3V and requires ultra-high node density or enhanced ESD robustness. |
Compared with MAX485CSA+ and SP3485EN-L, the SN75176BDR provides superior thermal fault protection and native 5V TTL compatibility, making it optimal for industrial motor drives and telecom infrastructure where reliability under electrical stress is critical.
Availability
SN75176BDR is available at Aetrix Electronics and suitable for industrial motor controls, telecom remote units, digital signage networks, and weigh scale systems requiring stable component supply across production lifecycles.
Supply support for SN75176BDR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The SN75176BDR belongs to TI's legacy RS-485 transceiver product line, engineered specifically for rugged, cost-effective half-duplex differential communication in electrically noisy, long-distance industrial networks.
FAQ
What is the operating temperature range for the SN75176BDR?
The SN75176BDR is specified for 0°C to +70°C ambient operation. This commercial-grade range aligns with its intended use in indoor industrial equipment, digital signage controllers, and telecom base station peripherals where environmental control is maintained. It does not support extended industrial (–40°C to +105°C) operation like the SN65176B variant.
Does the SN75176BDR support full-duplex RS-485 communication?
No, the SN75176BDR is a half-duplex transceiver with shared A/B bus terminals and separate DE/RE controls. It cannot transmit and receive simultaneously. For full-duplex operation, a four-wire RS-422 configuration or a dedicated full-duplex transceiver such as the SN75179B is required.
How many SN75176BDR transceivers can be connected to one RS-485 bus?
Up to 32 unit loads can be connected to a single RS-485 bus using the SN75176BDR, based on its 12kΩ minimum receiver input impedance. Each device counts as one unit load; adding bias resistors or other receivers reduces the allowable count proportionally.
What is the purpose of the DE and RE pins on the SN75176BDR?
The DE (driver enable, active-high) and RE (receiver enable, active-low) pins provide independent control of driver and receiver states. When tied together with an inverter, they form a single direction-control signal - enabling clean half-duplex handshaking without bus contention in UART-based systems using the SN75176BDR.
Is external fail-safe biasing required for the SN75176BDR?
Yes, the SN75176BDR has no internal fail-safe biasing. To ensure a defined logic state during open/idle bus conditions, external resistors (e.g., pull-up on A, pull-down on B) must be added to bias the A–B differential voltage above +200mV, preventing receiver output oscillation.
SN75176BDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Transceiver
- Protocol:
- RS422, RS485
- Number of Drivers/Receivers:
- 1/1
- Duplex:
- Half
- Receiver Hysteresis:
- 50 mV
- Data Rate:
- -
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SN75176BDR FAQ
1.How can I place an order for SN75176BDR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN75176BDR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN75176BDR reliable?
The price and inventory of SN75176BDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN75176BDR is usually 5 days.
3.What payment methods are accepted for SN75176BDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN75176BDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN75176BDR?
SN75176BDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN75176BDR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN75176BDR?
For technical support, including SN75176BDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN75176BDR requirements.
6.How does Aetrix verify that SN75176BDR is sourced from the original manufacturer or authorized distributors?
All SN75176BDR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN75176BDR meets industry standards.
7.What is the process for return or replacement of SN75176BDR?
All SN75176BDR units undergo pre-shipment inspection (PSI). If there is an issue with SN75176BDR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN75176BDR part is unused and in its original packaging.
Return procedure for SN75176BDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN75176BDR Tags
-
ATA6561-GAQW-N
Microchip Technology
-
ATA6561-GBQW-N
Microchip Technology
-
AM26LS32ACDR
Texas Instruments
-
SP485CN-L/TR
MaxLinear, Inc.
-
SP485EN-L/TR
MaxLinear, Inc.
-
SP485EEN-L/TR
MaxLinear, Inc.
-
SP485ECN-L/TR
MaxLinear, Inc.
-
THVD1400DR
Texas Instruments
-
AM26C31IDR
Texas Instruments
-
TLIN1021ADRQ1
Texas Instruments
-
MAX232IDR
Texas Instruments
-
AM26C32IDR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
