My Inquiry
My Account
Texas Instruments DS26LS31CN
- Part No.:
- DS26LS31CN
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
DS26LS31CN.pdf
- Description:
- IC TRANSCEIVER 4/0 16PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,574
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DS26LS31CN from Texas Instruments is a quad high-speed differential line driver IC designed for RS-422 digital data transmission over balanced twisted-pair lines. It operates from a single 5V supply, delivers 10 ns typical input-to-output delay, 2.0 ns typical output skew, and features TRI-STATE outputs with complementary drive capability in a 16-pin PDIP package for industrial serial communication interfaces.
For engineers reviewing the DS26LS31CN datasheet, DS26LS31CN pinout, DS26LS31CN application, or DS26LS31CN equivalent, key selection considerations include RS-422 compliance, 20 mA drive strength per channel, disable-enabled bus contention control, and commercial temperature range (0°C to +70°C) operation in through-hole packaging.
Technical Context
The DS26LS31CN implements four independent LS-compatible differential drivers with logically ANDed enable control, supporting unipolar differential signaling into 100 Ω loads. Its output stage provides short-circuit protection and maintains high-impedance TRI-STATE behavior when VCC = 0 V.
It meets EIA RS-422 and Federal Standard 1020 requirements, with VOH ≥ 2.5 V at −20 mA and VOL ≤ 0.5 V at 20 mA under 5V supply. Input thresholds are VIH ≥ 2.0 V and VIL ≤ 0.8 V, ensuring compatibility with TTL/LS logic families.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75 V to 5.25 V - Ensures stable RS-422 output voltage margins across commercial temperature range. |
| Output Drive Current | ±20 mA - Sustains differential voltage swing >2 V into 100 Ω load for noise-immune long-line transmission. |
| Propagation Delay | 10 ns typical - Enables reliable operation up to ~50 Mbps in point-to-point or multidrop RS-422 links. |
| Output Skew | 2.0 ns typical - Minimizes inter-channel timing mismatch critical for synchronous multi-signal transmission. |
| Enable/Disable Time | tLZ/tHZ = 15–35 ns - Supports fast bus arbitration and hot-swap capable system designs. |
| Input Load | One unit load - Allows direct connection to standard LS/TTL outputs without fanout limitations. |
| Short-Circuit Protection | −30 mA to −150 mA - Limits fault current during line shorts, preventing thermal damage during field operation. |
Pinout & Package
DS26LS31CN is housed in a 16-pin plastic dual in-line package (PDIP), package drawing NFG0016E, with 0.3-inch body width and through-hole mounting. Pin 1 is located at top-left corner with notch orientation as shown in TI's Figure 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 7, 10 | Non-Inverting Inputs (A1–A4) | Accept LS/TTL-compatible logic signals; one unit load each. |
| 2, 5, 8, 11 | Inverting Inputs (B1–B4) | Provide complementary input reference for differential driver pairs. |
| 3, 6, 9, 12 | Non-Inverting Outputs (Y1–Y4) | Drive positive side of RS-422 differential pair with ±20 mA capability. |
| 13, 14, 15, 16 | Inverting Outputs (Z1–Z4) | Drive negative side of RS-422 differential pair; complementary to Yx outputs. |
| 17 (N/C) | No Connect | Not bonded; left unconnected per TI mechanical drawing NFG0016E. |
| 18 (N/C) | No Connect | Not bonded; left unconnected per TI mechanical drawing NFG0016E. |
Key Features
| Feature | Design Value |
|---|---|
| RS-422 Compliance | Fully meets EIA-422 electrical specifications including differential output voltage, loading, and timing. |
| TRI-STATE Enable Control | Single active-low enable (pin 16 common to all drivers) allows shared bus operation without external gating. |
| Zero-Voltage Output Isolation | Outputs remain high-impedance even when VCC = 0 V - prevents back-driving powered-down systems. |
| Short-Circuit Tolerance | Internally limited output current protects against sustained line shorts without latch-up or damage. |
| Pin Compatibility | Direct replacement for AM26LS31 in PDIP package - enables legacy design refresh without layout change. |
Applications
| Industrial PLC Serial Links | Point-of-Sale Terminal Interfaces |
|---|---|
Use Scenario: Bidirectional RS-422 communication between PLC CPU and remote I/O modules over 100+ meter twisted-pair runs in factory environments. IC Role / Device Role / Timing Role: Differential line driver providing noise-immune signal transmission with precise channel-to-channel timing alignment. Use Value: 2.0 ns typical output skew ensures deterministic sampling at receiver end, reducing bit error rate in electrically noisy plants. |
Use Scenario: Connecting receipt printers, barcode scanners, and cash drawers to POS controllers via RS-422 daisy-chain topology. IC Role / Device Role / Timing Role: Quad driver enabling simultaneous control of multiple peripherals using shared enable logic and compact PCB footprint. Use Value: Four drivers in one 16-pin PDIP reduce board space vs discrete solutions while maintaining 20 mA drive for robust cable driving. |
| Medical Diagnostic Equipment Backplanes | Test & Measurement Instrumentation |
Use Scenario: Transmitting synchronized sensor data from modular acquisition units to central processing chassis in MRI or ultrasound systems. IC Role / Device Role / Timing Role: High-speed differential transmitter ensuring low-jitter, low-skew data delivery across backplane connectors. Use Value: 10 ns typical propagation delay supports sub-microsecond timing resolution required for time-critical diagnostic sampling. |
Use Scenario: Driving calibrated analog/digital signals from arbitrary waveform generators or logic analyzers to DUTs over extended cables. IC Role / Device Role / Timing Role: Precision line driver delivering clean, matched differential waveforms with minimal edge distortion. Use Value: Complementary outputs and tight skew preserve signal integrity for high-fidelity waveform reproduction up to 50 Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad differential line driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM26LS31PC | Identical pinout and electrical specs; same PDIP-16 package; manufactured by TI under legacy AMI branding. | No functional difference - fully interchangeable in existing designs requiring second-source availability. | Select AM26LS31PC only if sourcing constraints require legacy part number continuity or distributor stock alignment. |
| SN65LVDS31D | LVDS output standard (3.3 V supply), lower power (25 mA max), higher speed (>400 Mbps), SOIC-16 package. | Requires level-shifting for 5 V logic systems; not RS-422 compliant; unsuitable for legacy 5 V infrastructure. | Choose SN65LVDS31D only for new 3.3 V designs targeting higher data rates and lower EMI, not for drop-in replacement. |
Compared with AM26LS31PC, DS26LS31CN offers identical functionality and form factor but reflects TI's post-acquisition part numbering; versus SN65LVDS31D, it provides RS-422 compliance and 5 V compatibility at the cost of speed and power efficiency - making DS26LS31CN optimal for maintaining legacy industrial serial infrastructure.
Availability
DS26LS31CN is available at Aetrix Electronics and suitable for industrial automation, point-of-sale systems, and medical instrumentation requiring stable component supply with through-hole assembly compatibility and long-term obsolescence management.
Supply support for DS26LS31CN 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 company headquartered in Dallas, Texas, delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The DS26LS31CN belongs to TI's legacy interface line driver family, engineered specifically for robust, noise-immune RS-422 data transmission in commercial-temperature industrial control and instrumentation systems.
FAQ
What is the operating temperature range for DS26LS31CN?
The DS26LS31CN is specified for commercial temperature operation from 0°C to +70°C. This range is confirmed in the "Operating Conditions" table of the official TI datasheet SNOSBK1C, and applies to the DS26LS31C variant denoted by the 'C' suffix - matching the 'CN' package designation used in DS26LS31CN/NOPB.
Does DS26LS31CN support true RS-422 compliance?
Yes, DS26LS31CN meets all electrical requirements of EIA Standard RS-422 and Federal Standard 1020, including differential output voltage ≥2 V into 100 Ω, input thresholds compatible with TTL/LS logic, and common-mode voltage tolerance - as verified in the "Features" and "Electrical Characteristics" sections of TI's SNOSBK1C datasheet.
Is DS26LS31CN pin-compatible with AM26LS31?
Yes, DS26LS31CN is explicitly stated as pin-compatible with AM26LS31 in the TI datasheet SNOSBK1C Feature list. Both use identical 16-pin PDIP (NFG0016E) packaging and share identical pin functions, enabling direct substitution in legacy designs without PCB modification.
What is the maximum output current rating for DS26LS31CN?
DS26LS31CN delivers ±20 mA output current per channel, as specified in the "Electrical Characteristics" table under VOH and VOL test conditions. This current supports RS-422-compliant differential voltage swing across standard 100 Ω termination loads.
Does DS26LS31CN have built-in short-circuit protection?
Yes, DS26LS31CN includes internal short-circuit protection with ISC rated from −30 mA to −150 mA per output, as documented in the "Electrical Characteristics" table. This limits fault current during line shorts and prevents thermal damage during sustained overload conditions.
DS26LS31CN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Driver
- Protocol:
- RS422, RS485
- Number of Drivers/Receivers:
- 4/0
- Duplex:
- -
- Receiver Hysteresis:
- -
- Data Rate:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
DS26LS31CN FAQ
1.How can I place an order for DS26LS31CN through Aetrix?
Please submit a Request for Quotation (RFQ) for DS26LS31CN 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 DS26LS31CN reliable?
The price and inventory of DS26LS31CN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS26LS31CN is usually 5 days.
3.What payment methods are accepted for DS26LS31CN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS26LS31CN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS26LS31CN?
DS26LS31CN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS26LS31CN 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 DS26LS31CN?
For technical support, including DS26LS31CN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS26LS31CN requirements.
6.How does Aetrix verify that DS26LS31CN is sourced from the original manufacturer or authorized distributors?
All DS26LS31CN 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 DS26LS31CN meets industry standards.
7.What is the process for return or replacement of DS26LS31CN?
All DS26LS31CN units undergo pre-shipment inspection (PSI). If there is an issue with DS26LS31CN, 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 DS26LS31CN part is unused and in its original packaging.
Return procedure for DS26LS31CN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS26LS31CN Tags
-
ATA6561-GAQW-N
Microchip Technology
-
ATA6561-GBQW-N
Microchip Technology
-
AM26LS32ACDR
Texas Instruments
-
SP485CN-L/TR
MaxLinear, Inc.
-
SP485EN-L/TR
MaxLinear, Inc.
-
SP485EEN-L/TR
MaxLinear, Inc.
-
SP485ECN-L/TR
MaxLinear, Inc.
-
THVD1400DR
Texas Instruments
-
AM26C31IDR
Texas Instruments
-
TLIN1021ADRQ1
Texas Instruments
-
MAX232IDR
Texas Instruments
-
AM26C32IDR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
