Texas Instruments AM26LS32PC

Overview

AM26LS32PC 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, and delivers TRI-STATE outputs with complementary enable controls-used in industrial serial communication interfaces requiring noise-immune signal reception.

For engineers reviewing the AM26LS32PC datasheet, AM26LS32PC pinout, AM26LS32PC application, or AM26LS32PC equivalent, key selection criteria include its ±7V common-mode input tolerance, 6 kΩ minimum input impedance, 17 ns typical propagation delay, TRI-STATE output compatibility with shared data buses, and commercial-grade (0°C to +70°C) temperature rating in PDIP package.

Technical Context

The AM26LS32PC implements four independent differential receivers with internal pull-up/pull-down resistors on inputs-unlike the base DS26LS32-to prevent floating-channel oscillation. Its logic-level outputs are compatible with TTL/CMOS loads and support bus-oriented architectures via dual active-low/active-high enable inputs per receiver group.

It meets RS-422 and RS-423 electrical standards with guaranteed operation across ±7V differential and common-mode voltage ranges, 200 mV minimum differential input threshold, and 100 mV hysteresis to reject noise near switching thresholds-critical for long-line, electrically noisy factory-floor or building automation links.

Key Specifications

Pinout & Package

AM26LS32PC is housed in a 16-pin plastic dual-in-line package (PDIP), designated NFG0016E by Texas Instruments, with 0.3-inch body width and through-hole mounting compatibility.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS26LS32ACM/NOPB, AM26LS32PC offers through-hole reliability and integrated input biasing but lacks RoHS compliance and SMT compatibility; versus SN65LBC179D, it provides quad-channel integration and hysteresis out-of-box but does not support RS-485 bus topology or higher common-mode stress.

Availability

AM26LS32PC is available at Aetrix Electronics and suitable for industrial serial interface, building automation network, and test equipment data acquisition requiring stable component supply and long-term obsolescence management.

Supply support for AM26LS32PC 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The AM26LS32PC belongs to TI's legacy interface line of RS-422/RS-423 receivers, engineered for robustness in electrically noisy environments and backward compatibility with legacy industrial control systems.

FAQ

What is the operating temperature range for AM26LS32PC?

The AM26LS32PC is rated for commercial operation from 0°C to +70°C. This range aligns with standard industrial control panels and office-based automation equipment where ambient thermal management is moderate. The device does not support extended or military temperature grades-those are covered by the AM26LS32M variant. Always verify ambient PCB temperature rise during thermal design to ensure sustained operation within this window for AM26LS32PC.

Does AM26LS32PC include internal input biasing resistors?

Yes, AM26LS32PC includes internal pull-up and pull-down resistors on each differential input pair-this distinguishes it from the base DS26LS32 and enables stable outputs on unused channels without external components. This feature is explicitly confirmed in the TI datasheet revision SNLS352C, Section 1 FEATURES, and applies directly to the AM26LS32PC variant as a member of the DS26LS32A family. No additional biasing network is needed for AM26LS32PC in partial-interface deployments.

Can AM26LS32PC be used in RS-485 systems?

No, AM26LS32PC is not designed for RS-485 bus operation. It lacks fail-safe biasing, receiver input sensitivity optimized for RS-485's ±200 mV threshold, and driver-enable coordination logic required for half-duplex RS-485 transceivers. While it can receive differential signals from an RS-485 driver in point-to-point mode, it does not meet RS-485 electrical specifications or interoperability requirements. For RS-485, use purpose-built receivers like SN65HVD10 or THVD1550 instead of AM26LS32PC.

What is the maximum data rate supported by AM26LS32PC?

Based on its 17 ns typical propagation delay (tPLH/tPHL) and 25 ns maximum under worst-case conditions, AM26LS32PC supports reliable operation up to approximately 30 Mbps in point-to-point RS-422 links with clean signal integrity. Real-world throughput depends on cable length, termination, and noise; for 100-meter runs, practical rates are typically ≤10 Mbps. The AM26LS32PC datasheet does not specify a formal "maximum data rate" limit but provides timing parameters sufficient to derive this performance bound.

Is AM26LS32PC RoHS compliant?

No, AM26LS32PC is not RoHS compliant. Per TI's Package Option Addendum (27-Oct-2016), AM26LS32PC carries status "LIFEBUY" and has no defined eco plan-its lead finish and packaging predate RoHS requirements. In contrast, modern SOIC variants like DS26LS32ACMX/NOPB are marked "Green (RoHS & no Sb/Br)". If RoHS compliance is mandatory, AM26LS32PC must be replaced with a qualified alternative; no exemption or conversion path exists for this PDIP part number.