SN75174N - 4-Channel 4 MBd RS-485 Driver | Texas Instruments
MPN: SN75174N ✗ End of Life| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
SN75174N Overview
A differential line driver is an interface IC that converts a single-ended logic signal into two complementary, balanced outputs. In the broader semiconductor hierarchy, a line driver belongs to interface ICs and communication transceivers, providing the physical signaling layer between digital controllers and wired buses. Its balanced differential output reduces sensitivity to common-mode noise and ground-potential differences compared with an unbalanced single-ended driver.
The SN75174N integrates four differential drivers, allowing one package to serve four data channels or two bidirectional interfaces when paired with suitable receivers. Every channel has an enable control that can place its differential outputs in a high-impedance 3-state condition. This feature allows several devices to share a bus, supports controlled bus segmentation, and permits external circuitry to establish an idle state. The device supports multipoint architectures without requiring separate single-driver-per-node packages.
Its principal verified performance points are four driver channels, a maximum signaling rate of 4 megabaud, 3-state outputs, and compatibility with EIA/TIA-422-B, RS-485, and ITU V.11 requirements. These figures position the part for industrial control, instrumentation, data acquisition, and embedded systems that use balanced copper wiring. The wide output common-mode range is particularly useful in party-line installations where nodes and cables introduce voltage variation.
The SN75174N is a driver, not a complete RS-485 transceiver, because it does not include receivers. Systems requiring bidirectional communication should pair it with a suitable receiver or transceiver. Signal integrity depends on controlled-impedance routing, correct pair geometry, termination at the physical endpoints, and common-mode considerations. The data supplied for this record does not include supply-voltage, output-current, propagation-delay, temperature, or absolute-maximum-rating values, so those values remain marked as data needed rather than inferred.
This page consolidates the verified manufacturer and distributor records, interface-standard context, application guidance, and replacement limitations in one engineering-oriented reference. Pricing and stock conditions are intentionally not represented as confirmed because the supplied distributor snippets provide availability language but no transaction-specific price table or inventory quantity.
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Request AlternativesSN75174N Specifications
| Product Type | Quadruple differential line driver |
| Number of Driver Channels | 4 channels |
| Output State | 3-state outputs |
| Maximum Data Rate | 4 megabaud |
| Supported Bus Standards | ANSI EIA/TIA-422-B, RS-485, and ITU Recommendation V.11 |
| Topology Suitability | Balanced multipoint bus |
| Package | 16-pin PDIP |
| Mounting Type | Through-hole |
SN75174N 16-pin pdip Pin Configuration Guide
Pin configuration for SN75174N (16-pin pdip package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for SN75174N.
Refer to the datasheet for full pin configuration.
Typical Applications
SN75174N is suitable for 6 applications: Industrial RS-485 Command Bus, Point-to-Point Differential Data Links, Data-Acquisition Equipment, Building and Facility Control, Embedded Instrumentation, Balanced Peripheral Communication.
Industrial RS-485 Command Bus
The SN75174N fits a controller node that must transmit several balanced command or status channels over copper wiring. Its four driver channels can handle up to four physical pairs, and the verified 4-megabaud capability supports moderate industrial control rates. The outputs are designed for RS-485 multipoint buses with wide positive and negative common-mode ranges, which is useful where distant nodes may introduce ground offsets. Engineers should enable only the active node’s driver, use twisted-pair routing, and terminate only the intended physical endpoints. Because this is a driver-only IC, an appropriate receiver is needed for inbound data.
Recommended
Point-to-Point Differential Data Links
The SN75174N can transmit four balanced differential channels between two circuit assemblies where noise immunity is more important than using single-ended logic. The four independent outputs conserve board area, while the 4-megabaud maximum gives adequate margin for many low- or moderate-speed control protocols. Route each output as a coupled pair, keep the pair geometry consistent, and avoid long stubs. Ensure the receiver recognizes the SN75174N output levels and signaling rates; the supplied data does not state voltage or delay limits, so those must be checked against the selected receiver and the official datasheet.
Recommended
Data-Acquisition Equipment
The SN75174N is applicable in measurement equipment that distributes commands to remote modules through balanced copper connections. Four channels permit organized separation for clock, strobe, enable, or serial data signals, while differential drive improves rejection of disturbances common to both conductors. The verified EIA/TIA-422-B and RS-485 positioning makes the part appropriate for multipoint laboratory and industrial acquisition networks. Place protection close to external connectors, maintain a continuous ground reference, and verify receiver thresholds. The driver must be disabled when the bus is not transmitting to avoid output contention.
Recommended
Building and Facility Control
The SN75174N can support low-speed balanced command networks in building-control equipment, where multiple controllers and field modules share copper wiring and electromagnetic noise may be present. Its four 3-state driver channels are useful for assigning separate enable or communication channels, while the verified multipoint interface support suits party-line arrangements. Use twisted pair, maintain controlled impedance where practical, and avoid star branches that create impedance discontinuities. The wide common-mode output behavior is relevant when nodes share ground imperfectly. Final electromagnetic-emissions and immunity requirements still depend on enclosure, cable installation, and protection design.
Recommended
Embedded Instrumentation
The SN75174N fits embedded instrument backplanes or remote panels where four balanced outputs must coexist in a compact through-hole package. It provides driver-only functionality, allowing transmit-only nodes, dedicated clock distribution pairs, or channels managed by independent enables. The 4-megabaud capability covers many serial control and instrumentation links, while differential outputs reduce susceptibility to shared ground noise. Do not substitute generic logic outputs for these pairs, and route them away from clocks or precision analog nodes. Confirm pin functions, enable timing, and output specifications in the Texas Instruments datasheet before layout release.
Recommended
Balanced Peripheral Communication
The SN75174N is useful in legacy and industrial peripheral interfaces that require several differential transmit channels rather than a single RS-485 direction. Its four channels can connect a host to separate peripherals, provide independent command lines, or support paired full-duplex links when suitable receivers are added. The part targets EIA/TIA-422-B and RS-485 applications at up to 4 megabaud, making it appropriate for moderate-speed control traffic. Maintain consistent cable pairs, install termination according to the bus topology, and provide a receiver with a compatible input range. Avoid simultaneous enable of multiple drivers on the same pair.
Recommended
Recommended Products Summary
Engineering reference data for SN75174N — comparison, design guidance, and compliance information.
Selection Guide
Design Notes
Route every differential channel as a coupled pair with consistent spacing and length matching to its counterpart. Avoid interrupting either conductor independently, and keep the outputs away from switching nodes and precision analog traces. The SN75174N supports up to 4 megabaud, but actual edge-rate content can be higher than the data rate; control return current paths and use ground planes to contain high-frequency fields.
Do not add supply bypassing values or rail limits from assumptions. Confirm the SN75174N operating voltage and current from the Texas Instruments datasheet, then place required local decoupling directly at the package power and ground pins. Estimated: the correct decoupling network cannot be calculated from the supplied search excerpts because supply voltage, load current, and datasheet recommendations are not present.
Enable only one node’s driver when multiple devices share the same RS-485 pair. A three-state output does not protect against two simultaneously enabled drivers, which can cause output contention and unpredictable bus voltage. Verify enable polarity and timing against the SN75174N pin table because those details were not included in the supplied excerpts. Also remember that SN75174N has no integrated receiver.
Terminate the cable at the two physical endpoints rather than every node, and avoid long branch stubs because they create reflections at higher effective edge rates. Although the bus data rate is verified at up to 4 megabaud, the serial waveform can contain significant transition energy. Use twisted-pair cable, appropriate common-mode protection, and a receiver selected for the actual cable length and noise environment.
Compliance Information
The supplied records identify EIA/TIA-422-B, RS-485, and ITU Recommendation V.11 interface requirements, but they do not provide explicit component-level RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations.