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Texas Instruments SN75118NS
- Part No.:
- SN75118NS
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
SN75118NS.pdf
- Description:
- SN75118 DIFFERENTIAL LINE TRANSC
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Inventory:6,600
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Product details
Overview
SN75118NS from Texas Instruments is a dual-function differential line transceiver integrating a 3-state differential driver and a 3-state differential receiver in a single 16-pin plastic (N) package, operating from a single 5-V supply. It features TTL-compatible inputs/outputs, ±15-V common-mode receiver input range, internal 130-Ω line-termination resistor, and receiver output-enable control - enabling robust party-line bus communication in industrial data-bus systems.
For engineers reviewing the SN75118NS datasheet, SN75118NS pinout, SN75118NS application, or SN75118NS equivalent, key selection considerations include its 3-state receiver enable (RE), split totem-pole receiver outputs (RYP/RYS), differential driver output configuration (DYP/DYS/DZP/DZS), RTC frequency-response control, and compatibility with RS-422-style differential signaling over noisy industrial backplanes.
Technical Context
The SN75118NS implements independent driver and receiver sections sharing only VCC and GND. Its driver supports dual-input AND/NAND logic with 3-state control via DE, while its receiver uses differential A/B inputs with strobe-free 3-state enable (RE), allowing precise timing control of bus read cycles. The RTC pin enables external RC network adjustment of receiver bandwidth for noise immunity optimization.
Receiver inputs RA/RB accept ±15-V common-mode signals, with internal 130-Ω termination (RT pin) and ±1-V differential threshold (VIT±). Driver outputs DYP/DYS/DZP/DZS support both open-collector and totem-pole configurations via terminal separation, delivering ±40 mA drive capability and sub-35 ns propagation delays at 5 V and 30 pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard TTL logic rails and stable operation across industrial voltage tolerances. |
| Driver Output Current | ±40 mA - sufficient to drive terminated 100-Ω differential lines without external buffers. |
| Receiver Common-Mode Range | ±15 V - enables reliable operation in electrically noisy environments with ground potential differences up to 30 V. |
| Propagation Delay (Driver) | 12–30 ns - supports data rates up to ~15 Mbps on short-to-medium bus runs with tight timing margins. |
| Receiver Threshold Voltage | ±0.5 V (min) - provides noise margin against EMI-induced differential offsets on long cables. |
| Termination Resistor | 130 Ω (typical) - matches standard twisted-pair characteristic impedance for minimal reflections. |
| Output Enable Time | 8–20 ns (tPZH) - allows fast bus arbitration and multi-drop read/write sequencing. |
Pinout & Package
SN75118NS is housed in a 16-pin plastic DIP (N) package with 0.3-inch body width and through-hole mounting. Pin assignments follow industry-standard dual-in-line layout with functional grouping for differential I/O isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DZP / DZS | Driver sink/source outputs | Separated totem-pole terminals enabling open-collector use or internal connection for standard TTL drive. |
| DYP / DYS | Driver sink/source outputs | Paired with DZP/DZS to form full differential driver pair (Y/Z) with independent current paths. |
| RA / RB | Receiver differential inputs | Accept ±15-V common-mode signals; internally biased for 100-mV min differential sensitivity. |
| RT | Termination resistor tap | Connects to internal 130-Ω resistor; left open for enabled termination or grounded for disabled mode. |
| RYP / RYS | Receiver sink/source outputs | 3-state split totem-pole outputs controlled by RE; compatible with TTL bus loading. |
| DE | Driver enable | Active-high control: disables driver outputs to high-impedance state for bus sharing. |
| RE | Receiver enable | Active-high control: places RYP/RYS in high-impedance state to isolate receiver from bus. |
| RTC | Response-time control | External RC network adjusts receiver bandwidth to trade speed for noise immunity. |
| VCC / GND | Power supply | Single 5-V rail powers both driver and receiver; no separate analog/digital supplies required. |
Key Features
| Feature | Design Value |
|---|---|
| 3-State receiver output enable (RE) | Enables precise bus-read timing control and eliminates contention during multi-drop reads. |
| Internal 130-Ω line-termination resistor | Reduces external component count and PCB footprint for point-to-point or stubbed bus topologies. |
| Differential driver output terminal separation | Supports flexible interface design: open-collector for wired-OR or totem-pole for push-pull drive. |
| ±15-V receiver common-mode input range | Ensures interoperability across disparate ground domains in factory-floor automation networks. |
| Receiver frequency-response control (RTC) | Allows dynamic bandwidth tuning via external RC to suppress high-frequency noise without sacrificing DC integrity. |
Applications
| Industrial Data Bus | Factory Automation Network |
|---|---|
Use Scenario: Multi-drop serial communication between PLCs, HMIs, and I/O modules over 10–30 m twisted-pair cabling in electrically noisy plant environments. IC Role / Device Role / Timing Role: Differential transceiver providing noise-immune physical layer interface with 3-state bus arbitration and termination integration. Use Value: Eliminates need for external termination resistors and level translators while maintaining >10 kV ESD robustness and ±15 V ground offset tolerance. | Use Scenario: Backplane interconnect for modular control chassis where multiple slots share a common differential data bus. IC Role / Device Role / Timing Role: Bus transceiver enabling hot-swap-capable slot communication with synchronized RE/DE timing for glitch-free insertion/removal. Use Value: Sub-35 ns propagation delay and 8 ns output-enable time ensure deterministic bus turnaround within 100 ns timing windows. |
| Legacy RS-422 Interface | Test Equipment Data Link |
Use Scenario: Retrofitting legacy instrumentation with modern microcontrollers requiring RS-422-compliant differential signaling. IC Role / Device Role / Timing Role: Level-shifting transceiver translating TTL logic levels to differential bus signals with full compliance to RS-422 electrical specs. Use Value: ±15 V common-mode range and 130-Ω termination meet RS-422 requirements without additional biasing or termination components. | Use Scenario: High-reliability data link between automated test equipment (ATE) mainframe and modular instrument cards. IC Role / Device Role / Timing Role: Isolated differential transceiver ensuring signal integrity across card-edge connectors subject to vibration and thermal cycling. Use Value: Dual 3-state controls (DE/RE) allow independent driver/receiver disable for diagnostic loopback and fault isolation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential line transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN75116N | Receiver uses output strobe (RS) instead of enable (RE); lacks 3-state receiver control. | Requires external latch or timing circuitry for bus-read synchronization. | Choose SN75116N only if strobe-based sampling aligns with existing controller architecture. |
| SN75176BN | Half-duplex RS-485 transceiver with integrated fail-safe bias; no internal termination or RTC control. | Optimized for longer-distance, lower-speed multidrop networks with automatic direction control. | Prefer SN75176BN when replacing legacy RS-485 nodes and board space is constrained. |
Compared with SN75116N and SN75176BN, the SN75118NS uniquely combines 3-state receiver enable, internal 130-Ω termination, and RTC-adjustable bandwidth-making it optimal for high-speed, noise-sensitive industrial data buses requiring precise timing control and minimal external components.
Availability
SN75118NS is available at Aetrix Electronics and suitable for industrial data bus, factory automation network, legacy RS-422 interface, and test equipment data link applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SN75118NS 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 for industrial, automotive, and communications markets.
The SN75118NS belongs to TI's legacy differential line transceiver product line, designed specifically for robust, low-cost party-line bus interfacing between TTL systems and differential transmission lines in industrial control environments.
FAQ
What is the function of the RTC pin on the SN75118NS?
The RTC (Response-Time Control) pin on the SN75118NS accepts an external RC network to adjust the receiver's bandwidth. Connecting a capacitor to ground slows the receiver response, improving noise immunity at the cost of reduced maximum data rate. This feature allows system-level tuning of differential noise rejection without modifying hardware layout. The SN75118NS datasheet specifies typical values for CRTC to achieve defined bandwidth limits.
Does the SN75118NS support true RS-422 compliance?
Yes, the SN75118NS meets core RS-422 electrical specifications: ±15 V common-mode input range, ≥200 mV differential threshold, 130-Ω internal termination matching standard twisted-pair impedance, and ±40 mA driver output capability. While not certified to TIA/EIA-422-B, its measured parameters align with the standard's requirements for point-to-point or multi-drop differential signaling. The SN75118NS is widely deployed in RS-422-compliant industrial interfaces.
How does the SN75118NS differ from the SN75116N in receiver control?
The SN75118NS uses an active-high receiver enable (RE) pin for 3-state control of RYP/RYS outputs, whereas the SN75116N uses an active-high output strobe (RS) that latches the receiver output. This means the SN75118NS allows dynamic bus release during read cycles, while the SN75116N requires external clocking to capture data. For systems needing precise timing-controlled bus arbitration, the SN75118NS offers simpler integration than the SN75116N.
Can the internal 130-Ω termination resistor in the SN75118NS be disabled?
Yes, the internal 130-Ω termination resistor in the SN75118NS is enabled by leaving the RT pin unconnected (open). To disable it, connect RT to GND. This configuration flexibility allows the same SN75118NS footprint to support both terminated and unterminated bus segments. Disabling termination is recommended when using external biasing networks or in point-to-point links where reflections are negligible.
What package type does the SN75118NS use, and is it RoHS-compliant?
The SN75118NS uses a 16-pin plastic DIP (N) package with 0.3-inch body width and through-hole leads. As a legacy device introduced prior to RoHS legislation, the standard SN75118NS is not RoHS-compliant and contains lead in the solder plating and die attach. However, Texas Instruments offers Pb-free variants under different part number suffixes (e.g., SN75118NSR), which require explicit ordering confirmation. Always verify material content with the latest TI datasheet or Aetrix Electronics' compliance documentation before use in regulated markets.
SN75118NS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SN75118NS FAQ
1.How can I place an order for SN75118NS through Aetrix?
Please submit a Request for Quotation (RFQ) for SN75118NS 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 SN75118NS reliable?
The price and inventory of SN75118NS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN75118NS is usually 5 days.
3.What payment methods are accepted for SN75118NS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN75118NS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN75118NS?
SN75118NS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN75118NS 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 SN75118NS?
For technical support, including SN75118NS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN75118NS requirements.
6.How does Aetrix verify that SN75118NS is sourced from the original manufacturer or authorized distributors?
All SN75118NS 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 SN75118NS meets industry standards.
7.What is the process for return or replacement of SN75118NS?
All SN75118NS units undergo pre-shipment inspection (PSI). If there is an issue with SN75118NS, 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 SN75118NS part is unused and in its original packaging.
Return procedure for SN75118NS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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