SN75176BPS - RS-422/RS-485 Transceiver | Texas Instruments
N.º da peça: SN75176BPS ✓ AtivoSN75176BPS Visão geral
A differential bus transceiver is an interface IC that translates logic-level signals between a host controller and a balanced RS-422 or RS-485 bus. The SN75176BPS belongs to the broader transceiver hierarchy of interface ICs, communication ICs, and semiconductors. Differential signaling reduces susceptibility to common-mode noise because the receiver evaluates the voltage difference between two conductors rather than the voltage of either conductor relative to ground. The 3-state output adds a high-impedance condition, allowing multiple drivers to share a bus when only one node transmits at a time.
The SN75176B family is designed for multipoint transmission on long bus lines in noisy environments. According to the Texas Instruments manufacturer datasheet, the devices meet ANSI TIA/EIA-422-B and TIA/EIA-485-A requirements and ITU Recommendations V.11 and X.27. The SN75176BPS combines these balanced-line capabilities with an 8-pin SOIC package suitable for conventional surface-mount PCB assembly. Its one-driver, one-receiver arrangement supports half-duplex RS-485 nodes when the driver enable and receiver enable functions are controlled appropriately.
The 3-state driver can be disabled to release the bus, while the receiver provides differential data detection for the receiving function. This architecture supports communication links where multiple transceivers share the same differential pair and arbitration or token passing determines which node drives. Designers must still manage driver enable timing, bus termination, grounding, and protection against transients; the transceiver itself does not eliminate the need for correct bus topology and cable termination.
Typical applications include industrial RS-485 control networks, factory automation equipment, building-control systems, instrumentation links, telecommunications equipment, and data-acquisition networks. The SN75176BPS is appropriate when a compact 5 V interface is required for one differential bus channel. A system requiring several independent channels can use multiple SN75176B devices, while modern designs requiring lower unit loading or higher bus-node capacity should evaluate newer TI interface families against system-level requirements.
The principal design consideration is bus implementation rather than individual logic compatibility. A correctly terminated network reduces reflections, while grounding and cable routing influence common-mode performance. External protection may be necessary when exposed conductors experience industrial surges. Component selection should account for voltage range, logic levels, temperature grade, package, availability, and the number of nodes sharing the bus rather than relying on the RS-485 label alone.
This page consolidates the verified manufacturer description, distributor pricing, pin-compatible alternatives, interface standards, application guidance, and practical PCB considerations into one engineering reference. It also distinguishes confirmed drop-in information from ordering variants and identifies technical data that must be obtained from the manufacturer datasheet before final design release.
Alternativas drop-in para SN75176BPS — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com SN75176BPS (mesmo formato e footprint) — diferindo em Package, Supported Standards.
SN75176BDR
✅ Drop-InConsulte o preço
Ver ficha técnica →SN75176BPSE4
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
SN75176BPS Especificações
| Product Type | Differential bus transceiver |
| Supported Standards | RS-422 and RS-485 |
| Standard Compliance | ANSI TIA/EIA-422-B, ANSI TIA/EIA-485-A, ITU V.11 and ITU X.27 |
| Driver Count | 1 differential driver |
| Receiver Count | 1 differential receiver |
| Driver Output States | 3-state |
| Supply Voltage Range | 4.75 V to 5.25 V |
| Encapsulamento | 8-pin SOIC, 5.30 mm width |
| Tipo de montagem | Surface mount |
| Signal Type | Balanced differential |
| Bus Architecture | Multipoint transmission |
| Communication Direction | Bidirectional |
Guia de Configuração de Pinos do SN75176BPS 8-pin soic, 5.30 mm width
Configuração de pinos para SN75176BPS (pacote 8-pin soic, 5.30 mm width). A numeração dos pinos, funções e diagramas de conexão estão definidos no datasheet do fabricante. Consulte-o para o footprint exato e diretrizes de soldagem.
Nenhum dado detalhado de pinagem disponível para SN75176BPS.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
SN75176BPS é adequado para 6 aplicaçãos: Industrial RS-485 Control Networks, Factory Automation Sensor Backbone, Building Automation and HVAC Systems, Data Acquisition and Instrumentation, Telecommunications Equipment Interfaces, Point-to-Point RS-422 Equipment Link.
Industrial RS-485 Control Networks
The SN75176BPS fits industrial control networks requiring one bidirectional differential channel on a 5 V supply. Its one-driver, one-receiver architecture supports half-duplex bus nodes when the driver is disabled during reception, while the 3-state output permits multiple nodes to share the same pair without continuously driving the line. According to the Texas Instruments manufacturer datasheet, the family is designed for multipoint transmission on long bus lines in noisy environments and meets ANSI TIA/EIA-422-B and TIA/EIA-485-A requirements. System designers should still provide correct termination, grounding, cable routing, and any required surge protection.
Recomendado
Factory Automation Sensor Backbone
The SN75176BPS can connect a controller, sensor hub, or actuator interface to a shared RS-485 field bus. Differential signaling helps preserve data integrity when the cable runs near motors, relays, and switching equipment that generate common-mode disturbances. The device operates from 4.75 V to 5.25 V and combines a 3-state driver with a differential receiver, allowing the bus driver to be released when another node transmits. The main design constraint is network engineering: maintain a linear bus, use suitable termination at the physical ends, and validate ground references and transient protection against the installation environment.
Recomendado
Building Automation and HVAC Systems
The SN75176BPS is appropriate for building-control panels where sensors, room controllers, and HVAC equipment communicate over a wired differential bus. Its balanced-line interface supports reliable communication over distances that would be more sensitive to noise for single-ended signaling. The 8-pin SOIC package keeps the implementation compact, while the 3-state output allows several nodes to share one bus under coordinated transmit control. Designers should match logic levels, observe the device's supply range, and avoid using the transceiver alone as industrial surge protection; the external network may need isolation, steering control, or transient suppression.
Recomendado
Data Acquisition and Instrumentation
The SN75176BPS can interface a data-acquisition module to laboratory or process instrumentation using an RS-485 or RS-422 differential connection. Balanced differential reception reduces sensitivity to externally coupled noise, an advantage when measurements originate from long sensor cables or nearby test equipment. The receiver and 3-state driver provide a straightforward half-duplex implementation, but the selected microcontroller must manage driver-enable timing and bus turnaround. Verification should include checks for common-mode voltage, receiver sensitivity, maximum data rate, and termination because those detailed limits were not included in the supplied verified excerpt.
Recomendado
Telecommunications Equipment Interfaces
The SN75176BPS is suitable for telecommunications and network-interface equipment requiring a compact differential transceiver for balanced backplanes or cable links. Its 4.75 V to 5.25 V operating range integrates with conventional 5 V interface logic, and its 3-state output provides bus-release capability. The manufacturer's stated compliance with ANSI TIA/EIA-422-B, ANSI TIA/EIA-485-A, ITU V.11, and ITU X.27 supports use in legacy and industrial communication systems. Designers must still verify the exact receiver thresholds, common-mode range, driver loading, and temperature limits in the manufacturer datasheet before using the device in new high-rate systems.
Recomendado
Point-to-Point RS-422 Equipment Link
The SN75176BPS can implement a point-to-point RS-422 link between two pieces of equipment where differential signaling and receiver common-mode rejection are more important than multidrop flexibility. One transceiver is placed at each end, with the driver active during transmission and the 3-state output released when the node receives. Because the same device supports RS-422 and RS-485, PCB and inventory planning can be simplified. Cable length and data rate must remain within the manufacturer limits, and the system should use balanced cable, appropriate grounding, and termination appropriate to the selected topology.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para SN75176BPS — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | SN75176BDR | SN75176BPSE4 |
|---|---|---|---|
| Package | 8-pin SOIC | 8-pin SOIC - same | 8-pin SOIC - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Supply Voltage Range | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V |
| Supported Interfaces | RS-422 and RS-485 | RS-422 and RS-485 | RS-422 and RS-485 |
| Driver Count | 1 differential driver | 1 differential driver | 1 differential driver |
| Receiver Count | 1 differential receiver | 1 differential receiver | 1 differential receiver |
| Driver Output State | 3-state | 3-state | 3-state |
| Verified Replacement Status | Reference device | Complete replacement; no circuit modification | Complete replacement; no circuit modification |
Principais diferenciais
- Verified complete replacement without PCB changes (vs SN75176BDR)
- Same-channel RS-422 and RS-485 interface (vs SN75176BDR)
- Compact multipoint bus transceiver (vs SN75176BPSE4)
Notas de projeto
Route the RS-422 or RS-485 pair as a tightly coupled differential pair, with the two conductors following similar geometry and referencing a continuous ground plane. Avoid routing the bus alongside switching nodes, high-current motor wiring, or clock and data edges that can couple noise into the cable. Keep the transceiver close to the connector and protection devices so transient current is diverted before it reaches the IC. The manufacturer identifies the SN75176B family for multipoint transmission on long bus lines in noisy environments, but layout quality remains essential for achieving that performance.
Do not treat the 3-state output as a substitute for correct bus arbitration. Only one driver should actively transmit on a shared differential bus, so the controller must assert driver enable only while transmitting and release it during reception. Verify logic polarity, receiver enable requirements, bus turnaround timing, and termination against the manufacturer datasheet. A physically linear bus with termination only at the two ends is generally preferable to star branches, because excessive stubs and incorrect termination increase reflections and can make communication unreliable.
Place the 5 V supply bypass capacitor close to the device's supply and ground pins, and keep the return current path short to reduce shared-impedance disturbance. The verified SN75176BPS supply range is 4.75 V to 5.25 V, so the source must remain within that range under load. Do not estimate acceptable supply ripple from the excerpt alone: verify the permitted voltage, total supply current, and driver load state in the manufacturer datasheet before setting ripple or decoupling requirements for the design.
For cables leaving an enclosure, evaluate the exposed conductors for surge, ESD, and lightning exposure and add appropriately rated external protection if required. The SN75176BPS is a communications transceiver, not a complete surge-protection system. Protection-device capacitance, clamping voltage, current rating, and grounding topology can affect both bus signaling and insulation requirements. Validate the completed interface with the intended cable, connectors, grounding arrangement, and worst-case noise environment rather than relying only on bench-level logic tests.
Informações de conformidade
The supplied excerpts identify ANSI TIA/EIA-422-B, ANSI TIA/EIA-485-A, ITU V.11, and ITU X.27 interface compliance, but they do not provide product-specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. These fields remain unknown until verified on the manufacturer product page or supporting compliance documentation.
