Texas Instruments AM26LV32IDR

Overview

AM26LV32IDR from Texas Instruments is a BiCMOS quadruple differential line receiver designed for RS-422/RS-485 bus systems, operating from a single 3.3-V supply with ±200-mV input sensitivity, −0.3-V to 5.5-V common-mode range, and 32-MHz switching rate. It delivers fail-safe operation under open-circuit, shorted, and terminated conditions and supports 5-V logic inputs while powered at 3.3 V.

For engineers reviewing the AM26LV32IDR datasheet, AM26LV32IDR pinout, AM26LV32IDR application, or AM26LV32IDR equivalent, key selection criteria include differential input hysteresis (50 mV), propagation delay (8–20 ns), output enable/disable timing, thermal resistance (72.9°C/W), and industrial temperature range (−40°C to 85°C).

Technical Context

The AM26LV32IDR implements four independent RS-422-compatible receivers with shared active-high/active-low enable control (G/G̅) and 3-state outputs. Its BiCMOS architecture enables high-speed operation up to 32 MHz while maintaining ultra-low power dissipation (27 mW typical at static, 235 mW at full load).

It features fail-safe circuitry that forces outputs high during open, shorted, or terminated input conditions, and accepts 5-V-tolerant inputs with 3.3-V V_CC. Input hysteresis (50 mV typical) enhances noise immunity across its wide −0.3-V to 5.5-V common-mode voltage range.

Key Specifications

Pinout & Package

AM26LV32IDR is housed in a 16-pin SOIC (D) package measuring 9.9 mm × 6 mm, with standard JEDEC MS-012AC footprint and gull-wing leads. Thermal resistance is 72.9°C/W (junction-to-ambient).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN65LVDS32DR and AM26C32CDR, the AM26LV32IDR uniquely balances 3.3-V operation, 5-V input tolerance, RS-422 compliance, and industrial temperature rating - making it optimal for brownfield upgrades and new low-power industrial designs requiring backward compatibility.

Availability

AM26LV32IDR is available at Aetrix Electronics and suitable for factory automation, smart grid metering, and AC motor drive applications requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for AM26LV32IDR 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 technologies for industrial, automotive, and communications markets.

The AM26LV32 product line delivers low-voltage, high-speed differential receivers optimized for robust RS-422/RS-485 communication in harsh industrial environments - emphasizing fail-safe reliability, noise immunity, and seamless integration with 3.3-V microcontrollers.

FAQ

What is the operating temperature range for AM26LV32IDR?

The AM26LV32IDR is characterized for industrial operation from −40°C to +85°C. This extended range ensures reliable performance in factory automation cabinets, outdoor smart grid enclosures, and motor drive heat zones where ambient temperatures exceed commercial-grade limits. The 'I' suffix in AM26LV32IDR explicitly denotes this industrial temperature grade, distinct from the commercial-grade AM26LV32CDR (0°C to 70°C).

Does AM26LV32IDR support 5-V logic inputs while powered from 3.3 V?

Yes, AM26LV32IDR accepts 5-V logic-level inputs with a 3.3-V V_CC supply. Its input structure is designed to tolerate VI up to 8 V (absolute max), and the datasheet confirms functional operation with 5.5-V inputs. This capability eliminates external level shifters when interfacing with legacy 5-V microcontrollers or FPGAs, simplifying design and reducing BOM cost in mixed-voltage systems.

How does the fail-safe feature work in AM26LV32IDR?

The AM26LV32IDR's fail-safe circuitry forces all four outputs to a high logic state when inputs are open-circuited, shorted together, or terminated - without requiring external bias resistors. This behavior is intrinsic to the internal comparator design and applies across the full −0.3-V to 5.5-V common-mode range. It prevents undefined states during cable disconnection or driver power-down, enhancing system safety in ATM and motor control applications.

What is the meaning of dual enable pins G and G̅ on AM26LV32IDR?

The AM26LV32IDR provides two enable inputs: G (pin 4, active-high) and G̅ (pin 12, active-low). Either pin can independently control all four receivers' output state. Driving G high enables outputs; driving G̅ low enables outputs. Both must be inactive (G low, G̅ high) to place outputs in high-impedance. This dual-enable flexibility allows direct connection to either active-high or active-low microcontroller GPIOs without inverters.

Is AM26LV32IDR pin-to-pin compatible with AM26C32 and AM26LS32?

Yes, AM26LV32IDR is pin-to-pin compatible with AM26C32 and AM26LS32 per the datasheet Feature section. All three share identical 16-pin SOIC pinout, terminal functions, and logic diagram. However, AM26LV32IDR operates at 3.3 V (vs. 5 V for the others), offers lower power, and has different common-mode and input sensitivity specs. This compatibility enables drop-in voltage scaling in existing designs without PCB revision.