My Inquiry
My Account
Texas Instruments SN75176ADR
- Part No.:
- SN75176ADR
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN75176ADR.pdf
- Description:
- IC TRANSCEIVER HALF 1/1 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:261
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN75176ADR from Texas Instruments is a bidirectional RS-422/RS-485 differential bus transceiver IC combining a 3-state line driver and differential receiver in a single SOIC-8 package, operating from a 5-V supply, with ±60 mA driver output capability, ±200 mV receiver sensitivity, and thermal shutdown protection - used for robust low-speed industrial serial communication up to 5 Mbps.
For engineers reviewing the SN75176ADR datasheet, SN75176ADR pinout, SN75176ADR application, or SN75176ADR equivalent, key selection considerations include its EIA/TIA-422-B and ITU V.11 compliance, wide common-mode input range (–7 V to +12 V), 12 kΩ minimum receiver input impedance, active-high driver enable (DE), and active-low receiver enable (RE) for flexible half-duplex bus control.
Technical Context
The SN75176ADR implements a TTL-to-RS-485/422 interface using separate active-high driver enable (DE) and active-low receiver enable (RE), allowing external direction control when tied together. Its driver provides differential output voltage ≥2 V into 100 Ω and features positive/negative current limiting plus thermal shutdown at ~150°C junction temperature.
The receiver delivers 50 mV typical hysteresis, ±200 mV input sensitivity, and high-impedance tri-state outputs when disabled. Both driver and receiver maintain bus isolation during disable or unpowered states, supporting party-line multipoint configurations with minimal bus loading.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75 V to 5.25 V - ensures stable operation across standard 5-V rail tolerances in industrial systems. |
| Driver Output Current | ±60 mA max - supports termination and stub loading on long RS-485 buses without external buffering. |
| Receiver Input Sensitivity | ±200 mV - reliably detects valid logic states under noisy conditions and marginal signal integrity. |
| Receiver Input Impedance | ≥12 kΩ - minimizes bus loading in multidrop networks with up to 32 unit loads. |
| Differential Output Voltage | ≥2.0 V (RL = 100 Ω) - meets RS-422 minimum swing for noise margin in electrically harsh environments. |
| Operating Temperature | 0°C to 70°C - qualified for commercial and light-industrial ambient conditions. |
| Common-Mode Range | –7 V to +12 V - enables interoperability across ground-potential differences in distributed systems. |
Pinout & Package
SN75176ADR is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, with 1.27 mm lead pitch and RoHS-compliant NiPdAu finish (MSL Level-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| R | Receiver Output | TTL-level logic output (active high) reflecting differential bus state; high-impedance when RE = high. |
| RE | Receiver Enable | Active-low control: drives R output when low; places R in high-Z when high - enables bus listening control. |
| DE | Driver Enable | Active-high control: enables A/B differential driver when high; disables (high-Z) when low - manages transmit direction. |
| D | Driver Input | TTL-level logic input driving the differential transmitter; referenced to GND and VCC. |
| GND | Ground Reference | Primary power and signal reference plane for internal circuitry and I/O stages. |
| A | Differential Bus Terminal | Non-inverting bus line (A) - forms differential pair with B; accepts and sources current per RS-485 polarity conventions. |
| B | Differential Bus Terminal | Inverting bus line (B) - complements A; differential voltage A–B defines logic state per ANSI/EIA-422-B. |
| VCC | Power Supply | +5 V DC input powering both driver and receiver sections; requires local 0.1 µF decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RS-485/422 Interface | Integrates driver and receiver in one IC, reducing board space and interconnect complexity for half-duplex bus nodes. |
| Thermal Shutdown Protection | Automatically disables driver at ~150°C junction temperature - prevents latch-up or damage during bus fault events. |
| Individual Enables (DE/RE) | Allows independent control of transmit/receive paths or combined direction control via external logic or microcontroller GPIO. |
| Wide Common-Mode Range | Supports –7 V to +12 V on A/B lines - accommodates ground offsets in multi-node factory automation or building control systems. |
| High Receiver Input Impedance | ≥12 kΩ enables connection of up to 32 unit loads on a single bus segment without signal degradation. |
Applications
| Industrial PLC Communication | Building Automation Network |
|---|---|
Use Scenario: Connecting programmable logic controllers (PLCs) and remote I/O modules over twisted-pair cabling in factory floors with electromagnetic interference. IC Role / Device Role / Timing Role: SN75176ADR serves as the physical layer transceiver, converting TTL UART signals to robust differential RS-485 for noise-immune point-to-multipoint data exchange. Use Value: Its ±200 mV receiver sensitivity and 50 mV hysteresis ensure reliable detection of valid logic states despite induced ground noise up to ±1 V. | Use Scenario: Interfacing HVAC controllers, lighting panels, and sensor gateways across extended building wiring runs (>300 m). IC Role / Device Role / Timing Role: SN75176ADR acts as the bus interface IC, enabling half-duplex master-slave communication at ≤5 Mbps on shared RS-485 trunk lines. Use Value: The ±60 mA driver output drives 120 Ω terminations and supports up to 32 nodes while maintaining >2 V differential swing for timing margin. |
| Legacy Equipment Retrofit | Low-Speed Sensor Hub Interface |
Use Scenario: Upgrading legacy instrumentation with TTL serial ports to RS-485 for integration into modern SCADA backbones. IC Role / Device Role / Timing Role: SN75176ADR bridges isolated TTL domains to multi-drop RS-485 networks, providing galvanic isolation-ready signal conditioning. Use Value: Its wide –7 V to +12 V common-mode range absorbs ground potential differences between aging equipment cabinets and new control rooms. | Use Scenario: Aggregating analog and digital sensor data (temperature, humidity, occupancy) from field nodes into a central gateway. IC Role / Device Role / Timing Role: SN75176ADR functions as the bus transceiver in a star- or daisy-chained sensor network, managing polled communication at 19.2–115.2 kbps. Use Value: Low quiescent current (≤50 mA enabled, ≤40 mA disabled) extends power budget in battery-backed or energy-harvested edge nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN75176BD | Higher 10 Mbps data rate support; identical pinout and SOIC-8 package; same 5-V supply and enable logic. | Required for designs needing >5 Mbps throughput (e.g., high-speed motion control feedback loops). | Select SN75176BD only if bandwidth exceeds 5 Mbps; SN75176ADR remains optimal for cost-sensitive ≤5 Mbps deployments. |
| MAX485CPA+ | Pin-compatible SOIC-8; lower driver output (±12 mA); no thermal shutdown; operates down to 4.75 V but lacks current limiting. | Suitable for short, low-noise, low-node-count links where fault protection is secondary. | Choose MAX485CPA+ for minimal-cost, low-power point-to-point links; SN75176ADR preferred for industrial-grade fault resilience and bus loading. |
Compared with SN75176BD and MAX485CPA+, the SN75176ADR offers superior fault protection (thermal shutdown + current limiting) and higher drive strength (±60 mA vs ±12 mA), making it more suitable for electrically noisy, long-cable, or high-node-count RS-485 networks where reliability outweighs raw speed.
Availability
SN75176ADR is available at Aetrix Electronics and suitable for industrial PLC communication, building automation networks, legacy equipment retrofit, and low-speed sensor hub interfaces requiring stable component supply and long-term manufacturability.
Supply support for SN75176ADR 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The SN75176ADR belongs to TI's legacy RS-485 transceiver product line, engineered specifically for robust, low-speed differential communication in electrically noisy industrial environments where reliability, fault tolerance, and interoperability with ANSI/EIA-422-B standards are critical.
FAQ
What is the maximum data rate supported by the SN75176ADR?
The SN75176ADR is rated for low-speed RS-485 communication up to 5 Mbps. It is not designed for higher rates; for 10 Mbps operation, Texas Instruments specifies the SN75176B variant. Signal integrity at 5 Mbps depends on proper termination, stub length control, and cable quality - the SN75176ADR's 65 ns typical differential transition time supports this bandwidth under standard CAT-5E cabling with 120 Ω termination.
Does the SN75176ADR include built-in fail-safe biasing?
No, the SN75176ADR does not integrate fail-safe biasing circuitry. External resistive biasing (e.g., pull-up on A, pull-down on B) is required to ensure a known logic state when the bus is idle or unterminated. This design allows flexibility in setting fail-safe thresholds but mandates careful layout - TI recommends keeping stub lengths short and adding biasing if open-bus conditions could cause undefined receiver output.
Can the SN75176ADR operate with a 3.3-V logic interface?
The SN75176ADR requires a 5-V supply (4.75–5.25 V) and is not 3.3-V logic compatible. Its DE, RE, and D inputs accept TTL-level thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), but direct connection to 3.3-V microcontrollers risks violating absolute maximum ratings if VCC = 5 V. Level-shifting or buffer circuits are necessary for safe interfacing with 3.3-V systems while maintaining SN75176ADR functionality.
How does thermal shutdown function in the SN75176ADR?
Thermal shutdown in the SN75176ADR activates at approximately 150°C junction temperature, disabling the driver output to prevent permanent damage during sustained bus faults (e.g., shorted A/B lines). Recovery is automatic once the die cools below the hysteresis threshold (~140°C). This protection works independently of enable controls and is documented in the Absolute Maximum Ratings and Electrical Characteristics sections of the SN75176ADR datasheet.
Is the SN75176ADR pin-compatible with the MAX485 series?
No, the SN75176ADR is not pin-compatible with the MAX485 series. While both are 8-pin SOIC RS-485 transceivers, their pin assignments differ: SN75176ADR uses Pin 1 = R (receiver out), Pin 2 = RE, Pin 3 = DE, Pin 4 = D, Pin 5 = GND, Pin 6 = A, Pin 7 = B, Pin 8 = VCC; MAX485 assigns Pin 1 = RO, Pin 2 = RE, Pin 3 = DE, Pin 4 = DI, Pin 5 = GND, Pin 6 = A, Pin 7 = B, Pin 8 = VCC - requiring PCB redesign for substitution. The SN75176ADR also differs in drive strength and protection features.
SN75176ADR 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
SN75176ADR FAQ
1.How can I place an order for SN75176ADR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN75176ADR 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 SN75176ADR reliable?
The price and inventory of SN75176ADR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN75176ADR is usually 5 days.
3.What payment methods are accepted for SN75176ADR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN75176ADR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN75176ADR?
SN75176ADR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN75176ADR 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 SN75176ADR?
For technical support, including SN75176ADR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN75176ADR requirements.
6.How does Aetrix verify that SN75176ADR is sourced from the original manufacturer or authorized distributors?
All SN75176ADR 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 SN75176ADR meets industry standards.
7.What is the process for return or replacement of SN75176ADR?
All SN75176ADR units undergo pre-shipment inspection (PSI). If there is an issue with SN75176ADR, 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 SN75176ADR part is unused and in its original packaging.
Return procedure for SN75176ADR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN75176ADR 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…
