Texas Instruments DS26LS32CN

Overview

DS26LS32CN from Texas Instruments is a quad differential line receiver IC designed for RS-422 and RS-423 balanced/unbalanced digital data transmission systems. It operates from a single 5V supply, provides ±0.2V input sensitivity over ±7V common-mode range, features 100 mV input hysteresis, 6 kΩ minimum input impedance, and TRI-STATE outputs with complementary enable control - used in industrial serial communication interfaces requiring noise-immune signal recovery.

For engineers reviewing the DS26LS32CN datasheet, DS26LS32CN pinout, DS26LS32CN application, or DS26LS32CN equivalent, key selection criteria include differential input voltage threshold (±0.2 V), common-mode range (±7 V), enable-controlled TRI-STATE output behavior, SOIC-16 package compatibility, and compliance with RS-422/RS-423 electrical standards in point-to-point or multidrop bus receivers.

Technical Context

The DS26LS32CN implements four independent high-impedance differential receivers with internal hysteresis to suppress noise-induced switching. Each channel accepts differential inputs up to ±7 V common-mode voltage while maintaining valid logic levels across industrial temperature ranges (0°C to +70°C).

It uses low-power Schottky bipolar technology and supports bidirectional bus interfacing via complementary ENABLE/ENABLE̅ inputs that jointly control all four outputs' TRI-STATE state. Output drive capability is specified at 8 mA sink current with VOL ≤ 0.45 V under full load.

Key Specifications

Pinout & Package

DS26LS32CN is housed in a 16-pin SOIC (Small Outline Integrated Circuit) package, D package drawing per TI documentation, RoHS-compliant with CU SN lead finish and moisture sensitivity level (MSL) Level-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad differential line receiver applications.

Compared with DS26LS32CN, SN65LBC174N offers extended common-mode tolerance but adds external component overhead, while MAX488CPA+ reduces quiescent power significantly but sacrifices synchronized multi-channel bus control - making DS26LS32CN optimal for cost-sensitive, medium-speed industrial bus receivers needing deterministic enable timing.

Availability

DS26LS32CN is available at Aetrix Electronics and suitable for industrial automation, point-of-sale systems, and medical diagnostics equipment requiring stable component supply, long-term manufacturability, and consistent electrical performance across production batches.

Supply support for DS26LS32CN 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 U.S.-based semiconductor company specializing in analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The DS26LS32CN belongs to TI's legacy RS-422/RS-423 interface product line, engineered for ruggedized serial communication in harsh electromagnetic environments with emphasis on noise rejection and bus-sharing flexibility.

FAQ

What is the operating temperature range for DS26LS32CN?

The DS26LS32CN is rated for commercial temperature operation from 0°C to +70°C. This range aligns with standard industrial ambient conditions and ensures reliable performance in non-military grade applications such as factory HMIs, POS terminals, and test equipment. The DS26LS32CN datasheet specifies electrical characteristics over this full range, with typical values measured at 25°C and VCC = 5 V.

Does DS26LS32CN support RS-485 communication?

No, DS26LS32CN does not support RS-485. It is specifically designed for RS-422 and RS-423 differential receiver applications. RS-485 requires driver/receiver combinations with true half-duplex or full-duplex transceiver functionality and different voltage thresholds. DS26LS32CN lacks driver circuitry and its input sensitivity (±0.2 V) and common-mode range (±7 V) match RS-422/RS-423, not RS-485's ±7 V differential and −7 V to +12 V common-mode specifications.

Can DS26LS32CN be used with a 3.3 V microcontroller?

Yes, DS26LS32CN outputs are compatible with 3.3 V logic inputs when powered from 5 V, provided the microcontroller's input high threshold (VIH) is ≤2.7 V - which most 3.3 V CMOS devices satisfy. DS26LS32CN VOH is guaranteed ≥2.7 V at 440 μA load, and VOL ≤0.45 V at 8 mA, ensuring solid logic '1' and '0' margins. However, direct connection requires verifying the MCU's absolute maximum input voltage rating (typically 3.6 V) to avoid overstress.

What is the purpose of the complementary ENABLE and ENABLE̅ pins on DS26LS32CN?

The complementary ENABLE (pin 14) and ENABLE̅ (pin 13) pins provide synchronous, glitch-free control of all four receiver outputs' TRI-STATE state. When ENABLE is high and ENABLE̅ is low, outputs are active; when ENABLE is low and ENABLE̅ is high, all outputs go high-impedance. This dual-signal scheme prevents momentary bus contention during enable transitions - a critical feature in shared-data-bus systems where DS26LS32CN must coexist with other drivers without external arbitration logic.

Is DS26LS32CN pin-compatible with DS26LS32AC or DS26LS32C?

Yes, DS26LS32CN shares identical pinout, package (SOIC-16), and functional interface with DS26LS32AC and DS26LS32C. All three belong to the same device family and use the D package drawing. Differences lie in internal features: DS26LS32AC includes input pull-up/pull-down resistors to prevent floating-input oscillation, whereas DS26LS32CN and DS26LS32C do not. Electrical timing and DC parameters remain consistent across these variants for standard operation.