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Texas Instruments SN75176BPS
- Part No.:
- SN75176BPS
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN75176BPS.pdf
- Description:
- IC TRANSCEIVER HALF 1/1 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,360
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Product details
Overview
SN75176B from Texas Instruments is a half-duplex RS-485/RS-422 differential bus transceiver in an 8-pin SOP (PS) package, operating from a single 5V supply. It features ±200mV receiver input sensitivity, ±60mA driver output capability, 12kΩ minimum receiver input impedance, and thermal shutdown protection at ~150°C - enabling robust multipoint communication in industrial motor controls and remote telemetry systems.
For engineers reviewing the SN75176B datasheet, SN75176B pinout, SN75176B application, or SN75176B equivalent, key selection considerations include its active-high driver enable (DE), active-low receiver enable (RE), wide –7V to +12V common-mode bus voltage range, 35ns typical receiver propagation delay, and compatibility with TIA/EIA-485-A and TIA/EIA-422-B standards.
Technical Context
The SN75176B integrates a 3-state differential line driver and a differential line receiver on a single die, both powered by 5V. Its driver supports up to 60mA sink/source current with positive/negative current limiting and thermal shutdown; the receiver delivers ±200mV input sensitivity and 50mV typical hysteresis for noise immunity in electrically noisy environments.
Pin DE (active-high) and RE (active-low) can be externally tied together to implement direction control in half-duplex RS-485 systems. The A/B bus terminals support party-line operation with high-impedance disable states and tolerate –10V to +15V absolute bus voltages, ensuring safe hot-plug and fault resilience.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75V to 5.25V - ensures stable operation across standard 5V rail tolerances without external regulation. |
| Receiver Input Sensitivity | ±200mV - reliably detects valid logic states even under severe common-mode noise or long-cable attenuation. |
| Driver Output Current | ±60mA - drives up to 32 unit loads on terminated RS-485 buses per ANSI/TIA-485-A specification. |
| Receiver Input Impedance | ≥12kΩ - minimizes bus loading in multidrop configurations, supporting >32 nodes on a single segment. |
| Thermal Shutdown Threshold | ≈150°C junction temperature - protects against sustained short-circuit or overcurrent faults on A/B lines. |
| Propagation Delay (Receiver) | 21–35ns - enables reliable 10Mbps operation over 100ft CAT-5E cable with clean eye diagrams. |
| Common-Mode Range | –7V to +12V - accommodates ground potential differences between nodes in large industrial installations. |
Pinout & Package
SN75176B is housed in an 8-pin SOP (PS) package measuring 6.20mm × 5.30mm, with gull-wing leads and surface-mount compatibility. The package meets JEDEC MS-012 standards and supports reflow soldering per IPC/JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| R | Receiver output | TTL-level logic data output (active low when VID ≤ –0.2V; high-impedance when RE = high). |
| RE | Receiver enable | Active-low control: disables receiver output to high-impedance state, reducing bus contention during transmit. |
| DE | Driver enable | Active-high control: enables differential driver output; tied to RE for simple half-duplex direction control. |
| D | Driver input | TTL-level logic input driving the A/B differential outputs; compatible with 5V CMOS/TTL logic families. |
| GND | Ground reference | Primary signal return path; must be connected to system ground with low-inductance layout near device. |
| A | Differential bus non-inverting | RS-485/422 non-inverting bus terminal; requires external termination resistor (120Ω) at segment ends. |
| B | Differential bus inverting | RS-485/422 inverting bus terminal; polarity must match A across all nodes to maintain signal integrity. |
| VCC | Power supply | 5V DC input; requires local 1.5µF ceramic decoupling capacitor placed within 5mm of pin per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RS-485/422 compliance | Fully meets TIA/EIA-485-A and TIA/EIA-422-B standards - validated for interoperability with legacy and modern industrial networks. |
| Individual driver/receiver enables | Separate DE (active-high) and RE (active-low) pins allow independent control of transmit/receive paths for advanced bus arbitration schemes. |
| Thermal shutdown + current limiting | Integrated protection triggers at ~150°C junction temperature and limits driver output to ±60mA - prevents latch-up during cable shorts. |
| High-noise immunity receiver | 50mV typical input hysteresis and ±200mV sensitivity ensure reliable detection in EMI-heavy environments like motor drive cabinets. |
| Wide common-mode voltage range | –7V to +12V common-mode tolerance - supports multi-node installations with ground offsets up to 19V between devices. |
Applications
| Chemical & Gas Sensors | Digital Signage |
|---|---|
Use Scenario: Distributed sensor nodes in hazardous-area refineries transmit analog/digital readings over 300m+ twisted-pair runs to central PLCs. IC Role / Device Role / Timing Role: SN75176B serves as the physical layer interface, converting microcontroller UART signals to robust differential RS-485 for noise-immune long-haul transmission. Use Value: ±200mV input sensitivity and –7V to +12V common-mode range prevent false triggering from EMI generated by nearby pumps and compressors. |
Use Scenario: Outdoor LED billboards use daisy-chained controllers updated remotely via centralized media players over industrial-grade cabling. IC Role / Device Role / Timing Role: SN75176B implements half-duplex RS-485 communication between master controller and up to 32 display modules. Use Value: 35ns max receiver propagation delay supports 10Mbps updates, enabling real-time brightness/color adjustments across large arrays. |
| Motor Control Systems | Telecom Tower RET Units |
Use Scenario: AC induction and stepper motor drives in factory automation require synchronized command and feedback exchange across multiple axes. IC Role / Device Role / Timing Role: SN75176B provides isolated, bidirectional bus communication between motion controller and distributed drive units. Use Value: Thermal shutdown and ±60mA driver output sustain operation during transient overloads caused by motor stall conditions. |
Use Scenario: Remote Electrical Tilt (RET) actuators mounted on cellular towers receive tilt-angle commands and report position/status over shared RS-485 links. IC Role / Device Role / Timing Role: SN75176B acts as the ruggedized bus interface between baseband unit and outdoor RET modules exposed to lightning-induced surges. Use Value: –10V to +15V absolute bus voltage rating withstands induced transients from nearby lightning strikes without latch-up or damage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RS-485 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX485CPA+ | SO-8 package, 2.5–5.5V supply, no thermal shutdown, lower driver current (±12mA), 250kbps max data rate | Suitable for low-power, low-speed point-to-point links; lacks fault protection for industrial bus segments | Select MAX485CPA+ only for cost-sensitive, low-noise, short-distance (<50m), low-node-count designs where thermal protection is not required. |
| SN65176BDR | Same SOIC-8 footprint, identical electrical specs, but rated for –40°C to +105°C industrial temperature range vs. SN75176B's 0°C to +70°C | Required for extended-temperature deployments (e.g., outdoor enclosures, engine bays, uncooled control cabinets) | Choose SN65176BDR when ambient operating temperature exceeds 70°C or when full industrial-grade qualification is mandated. |
Compared with MAX485CPA+, SN75176B offers superior fault resilience and higher data-rate capability; compared with SN65176BDR, it trades extended temperature range for lower cost and qualification scope - making SN75176B optimal for commercial-grade indoor industrial equipment.
Availability
SN75176B is available at Aetrix Electronics and suitable for industrial motor controls, telecom tower RET units, chemical sensor networks, and digital signage requiring stable component supply across multi-year production cycles.
Supply support for SN75176B 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, with decades of expertise in industrial interface ICs.
The SN75176B belongs to TI's RS-485 transceiver product line, engineered specifically for noise-immune, multipoint wired communication in harsh industrial and infrastructure environments.
FAQ
What is the operating temperature range of the SN75176B?
The SN75176B is specified for operation from 0°C to +70°C ambient temperature. This commercial-grade range suits indoor industrial control panels, digital signage controllers, and telecom base station indoor units. For applications requiring –40°C to +105°C, TI recommends the functionally identical SN65176BDR variant instead of the SN75176B.
Does the SN75176B support full-duplex RS-422 communication?
No, the SN75176B is a half-duplex transceiver - it shares the same A/B bus terminals for both transmit and receive functions. Full-duplex RS-422 requires separate driver and receiver pairs (e.g., SN75172/SN75173), whereas SN75176B uses internal 3-state control to isolate the driver during reception, making it ideal for RS-485 multidrop networks.
How is direction control implemented with the SN75176B?
Direction control is achieved by connecting the DE (driver enable, active-high) and RE (receiver enable, active-low) pins together and driving them with a single microcontroller GPIO. When the GPIO is high, the driver is enabled and receiver disabled; when low, the driver is disabled and receiver enabled - establishing clean half-duplex handshaking without timing overlap.
What is the maximum data rate supported by the SN75176B?
The SN75176B supports up to 10Mbps data rates, as verified by TI's eye diagram testing over 100ft of CAT-5E cable with 120Ω termination. At lower speeds (e.g., 250kbps), it reliably operates over distances exceeding 1200m - performance confirmed in the official SLLS101I datasheet Figure 7-2 and Section 5.6/5.7 switching characteristics.
Can the SN75176B be used without external biasing resistors?
Yes - the SN75176B operates without fail-safe biasing under normal conditions. However, in unterminated or lightly loaded buses where A–B differential voltage may float near 0V, external pull-up/pull-down resistors (e.g., 1.2kΩ from A to VCC, 1.2kΩ from B to GND) are recommended to ensure defined logic states during idle periods and prevent receiver output oscillation.
SN75176BPS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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-SO
SN75176BPS FAQ
1.How can I place an order for SN75176BPS through Aetrix?
Please submit a Request for Quotation (RFQ) for SN75176BPS 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 SN75176BPS reliable?
The price and inventory of SN75176BPS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN75176BPS is usually 5 days.
3.What payment methods are accepted for SN75176BPS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN75176BPS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN75176BPS?
SN75176BPS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN75176BPS 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 SN75176BPS?
For technical support, including SN75176BPS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN75176BPS requirements.
6.How does Aetrix verify that SN75176BPS is sourced from the original manufacturer or authorized distributors?
All SN75176BPS 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 SN75176BPS meets industry standards.
7.What is the process for return or replacement of SN75176BPS?
All SN75176BPS units undergo pre-shipment inspection (PSI). If there is an issue with SN75176BPS, 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 SN75176BPS part is unused and in its original packaging.
Return procedure for SN75176BPS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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