SN75174NG4 - Quad RS-485 Driver, 4 MBd | Texas Instruments
N.º da peça: SN75174NG4 ✓ AtivoSN75174NG4 Visão geral
A differential line driver is a digital interface component that converts one-sided logic signals into balanced differential outputs. A differential line-driver IC belongs to the broader interface-IC hierarchy, where driver and receiver devices support communication across cables, backplanes, and industrial buses. Balanced signaling improves noise immunity by combining equal-and-opposite signal paths, making this type of driver useful where ground potential differences and coupled noise can affect single-ended links.
According to the Texas Instruments SN75174 datasheet, the SN75174 is designed to meet ANSI EIA/TIA-422-B, RS-485, and ITU Recommendation V.11 requirements. Its key operating features include four driver channels, 3-state output capability, operation up to 4 megabaud, and wide positive and negative common-mode output voltage ranges. The wide output range supports party-line bus arrangements in electrically noisy environments.
The monolithic implementation provides four differential drivers in one package, reducing the number of separate line-driver packages required for a multi-channel communications interface. The 3-state outputs permit a driver to enter a high-impedance state when it is not actively driving a bus. This feature supports shared-bus architectures and gives system designers control over which connected node participates in transmission.
Typical uses include industrial RS-485 equipment, EIA/TIA-422-B balanced data links, multidrop party-line networks, instrumentation interfaces, and communications equipment requiring several differential outputs. Because the device is intended for balanced multipoint transmission, system design should account for cable impedance, termination, grounding, and the electrical behavior of every node connected to the bus.
Designers should use the manufacturer pin-description table when assigning PCB tracks and should verify the device's electrical limits and enable-control behavior against the specific system interface. Care is also needed when combining outputs on a shared bus so that multiple 3-state drivers are never enabled simultaneously, as simultaneous active outputs can produce contention.
This page combines the manufacturer's device information with practical interface-design guidance, application-fit analysis, and a package-focused comparison framework. It is intended to help engineers identify when the SN75174NG4 belongs in an RS-485 or EIA/TIA-422-B design before beginning board-level implementation.
Alternativas drop-in para SN75174NG4 — 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 SN75174NG4 (mesmo formato e footprint) — diferindo em Mounting Type, Output State, Package, Product Type.
SN75174N
✅ Drop-InConsulte o preço
Ver ficha técnica →SN75174P
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
SN75174NG4 Especificações
| Product Type | Quad differential line driver |
| Number of Driver Channels | 4 channels |
| Maximum Signaling Rate | 4 megabaud |
| Output State | 3-state |
| Supported Standards | ANSI EIA/TIA-422-B, RS-485, and ITU Recommendation V.11 |
| Bus Architecture | Balanced multipoint transmission |
| Common-Mode Output Range | Wide positive and negative range |
| Encapsulamento | 16-pin plastic dual in-line package (16-PDIP) |
| Package Pin Count | 16 pins |
| Tipo de montagem | Through-hole dual in-line |
Guia de Configuração de Pinos do SN75174NG4 16 pins
Configuração de pinos para SN75174NG4 (pacote 16 pins). 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 SN75174NG4.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
SN75174NG4 é adequado para 6 aplicaçãos: Industrial RS-485 Communication, EIA/TIA-422-B Balanced Data Link, Multidrop Party-Line Network, Instrumentation Control Interface, Data Acquisition Equipment, Noise-Prone Communications Equipment.
Industrial RS-485 Communication
The SN75174NG4 is appropriate for industrial equipment that needs multiple balanced RS-485 transmit channels in one package. According to the Texas Instruments SN75174 datasheet, the device supports balanced multipoint transmission at rates up to 4 megabaud and provides 3-state outputs for shared-bus control. Place the IC behind the system's logic-level interface and terminate the bus according to its topology. The four-channel package can reduce board area, but each output pair still requires correct differential routing and adequate grounding.
EIA/TIA-422-B Balanced Data Link
The SN75174NG4 can implement several EIA/TIA-422-B transmit channels because the manufacturer identifies the device as compliant with ANSI EIA/TIA-422-B requirements. Its four differential outputs operate at rates up to 4 megabaud, while the wide positive and negative common-mode output range supports practical cable environments. Use the pin-description table to map logic inputs and differential outputs, and preserve controlled return paths to minimize common-mode conversion and cable-radiated noise.
Multidrop Party-Line Network
The SN75174NG4 fits a multidrop bus in which multiple nodes share the same communication conductors. The Texas Instruments SN75174 datasheet identifies 3-state outputs and a wide common-mode output range as features suited to party-line transmission in noisy environments. Controlling the device enable so only one node drives the bus at a time prevents output contention. Cable length, stub length, topology, and termination should be validated together because the 4 megabaud device rating does not remove channel-dependent limits.
Instrumentation Control Interface
The SN75174NG4 is useful in test and measurement equipment requiring several balanced command or data outputs. Four differential driver channels provide compact bus-driver capacity at speeds up to 4 megabaud, while the 3-state function permits interface sharing. Place the device near the connector and cable-entry area to minimize trace mismatch, provide a stable low-noise reference for the logic side, and follow the manufacturer's pinout exactly. The interface still requires suitable protection if the cable leaves the equipment enclosure.
Data Acquisition Equipment
Data acquisition systems can use the SN75174NG4 to distribute balanced control signals to multiple peripheral modules. The quad differential driver provides four channels at up to 4 megabaud and is designed around EIA/TIA-422-B and RS-485 electrical requirements. Route each differential pair as a controlled impedance path with symmetrical geometry and avoid adding long stubs between nodes. Because this IC only drives signals, input conversion and receiver functions must be implemented separately.
Noise-Prone Communications Equipment
The wide positive and negative common-mode output range makes the SN75174NG4 suitable for balanced communications equipment operating in electrically noisy environments. According to the Texas Instruments SN75174 datasheet, these output characteristics support party-line transmission, while the 3-state outputs permit inactive bus nodes to present a high impedance. Use a sound grounding and shielding strategy, keep cable connections away from switching nodes where practical, and verify the interface under worst-case common-mode conditions.
Dados de referência de engenharia para SN75174NG4 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | SN75174N | SN75174P |
|---|---|---|---|
| Package | 16-PDIP | 16-PDIP | 16-PDIP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Device Type | Quad differential line driver | Quad differential line driver | Quad differential line driver |
| Driver Channels | 4 channels | 4 channels | 4 channels |
| Maximum Data Rate | 4 megabaud | 4 megabaud | 4 megabaud |
| Output State | 3-state | 3-state | 3-state |
Principais diferenciais
- Four differential channels in one package (vs SN75174N)
- Multipoint bus operation at 4 megabaud (vs SN75174P)
- Standards-oriented differential interface support (vs SN75174N)
Notas de projeto
Ensure that only one SN75174NG4 driver channel is actively driving a shared bus at a time. The device's 3-state outputs are intended for multipoint and party-line use, but simultaneous active outputs can cause contention and unpredictable voltage. Define a fail-safe enable strategy so that reset, power-up, fault, and firmware states leave unused or disconnected nodes in a high-impedance condition.
Route each differential output as a closely coupled pair with matched geometry and a continuous ground reference beneath or beside the pair. Avoid long stubs, right-angle transitions, and unnecessary vias because these features can degrade signal integrity and increase radiated noise at the 4 megabaud device limit. Keep the interface path away from switching power nodes and place any required bus termination close to the line-driver connection according to the system topology.
Balanced outputs reduce susceptibility to common-mode noise but do not eliminate cable radiation. Use a controlled cable impedance, proper ground references, and screened connectors where the interface leaves an enclosure. Verify the finished design with the longest intended cable and worst-case node loading. If emissions are excessive, inspect connector return paths, cable shield termination, and any unbalanced test equipment connected to the bus.
Informações de conformidade
The verified product information confirms the interface standards but does not state the environmental, lead-free, halogen-free, or conflict-minerals status for the exact SN75174NG4 orderable suffix.
