Allegro MicroSystems A19350LUBATN-RBE-A

Overview

A19350LUBATN-RBE-A from Allegro MicroSystems is a Giant Magnetoresistance (GMR) wheel speed and direction sensor IC with two-wire current-source output, ASIL B safety compliance, integrated 2.2 nF capacitor, and 2-pin SIP UB package. It delivers precise speed/direction sensing for automotive wheel applications using differential GMR elements, operates from 4–24 V, supports up to 3.9 kHz forward rotation, and maintains accuracy across –40°C to +150°C ambient.

For engineers reviewing the A19350LUBATN-RBE-A datasheet, A19350LUBATN-RBE-A pinout, A19350LUBATN-RBE-A application, or A19350LUBATN-RBE-A equivalent, key selection criteria include its pulse-width protocol timing (tW(FWD) = 76–104 μs), vibration-immune direction validation, integrated diagnostics for ASIL B, and compatibility with front-biased ring magnet targets at air gaps typical in ABS and ESC systems.

Technical Context

The A19350LUBATN-RBE-A implements a dual-channel differential GMR front-end with analog-to-digital conversion and digital signal conditioning, enabling robust rejection of common-mode magnetic interference. Its SolidSpeed Digital Architecture executes real-time algorithms for dynamic threshold setting, direction validation, and vibration immunity-specifically configured in the -RBE variant for high-vibration immunity mode with 2-cycle recovery.

This variant uses the -R suffix (forward rotation defined as pin 2 → pin 1), -B (ASIL protocol enabled), and -E (warning and standstill pulses enabled), delivering tW(WARN) = 38–52 μs and tW(STILL) = 1232–1656 μs. The EEPROM scratch memory ensures traceability, while the integrated ceramic capacitor enhances EMC robustness without external components.

Key Specifications

Pinout & Package

The A19350LUBATN-RBE-A is housed in a Pb-free 2-pin SIP (Single In-line Package) designated UB, measuring 18.00 ±0.10 mm × 4.00 +0.06/–0.05 mm × 1.80 ±0.10 mm, with tin-plated leadframe and molded lead-stabilizing bar for mechanical robustness during shipping and SMT assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar wheel speed and direction sensing applications.

Compared with A19350LUBATN-RBE-A, the -FBE-A variant offers identical performance with inverted pin-defined rotation logic, while ATS6858LSGT-T provides functional overlap but demands ECU-level interpretation of direction-making A19350LUBATN-RBE-A preferable for drop-in ASIL B-compliant direction-aware designs.

Availability

A19350LUBATN-RBE-A is available at Aetrix Electronics and suitable for automotive ABS, ESC, and transmission control applications requiring stable component supply, long-term lifecycle support, and ASIL B-certified magnetic sensing performance.

Supply support for A19350LUBATN-RBE-A 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

Allegro MicroSystems is a U.S.-based designer and manufacturer of high-performance power and sensing ICs, specializing in magnetic sensing, motor driver, and power management solutions for automotive and industrial markets.

The A19350 product line delivers high-accuracy, ASIL-compliant GMR wheel speed and direction sensing for safety-critical automotive systems, with architecture optimized for robustness in harsh under-hood and wheel-end environments.

FAQ

What is the pin configuration and polarity definition for A19350LUBATN-RBE-A?

The A19350LUBATN-RBE-A uses a 2-pin SIP UB package: Pin 1 is VCC (supply input), Pin 2 is GND (return path). As an -R variant, forward rotation is defined as target motion from pin 2 toward pin 1. This determines tW(FWD) output pulse generation and must align with mechanical mounting orientation relative to the ring magnet.

Does A19350LUBATN-RBE-A require external components for operation?

No. The A19350LUBATN-RBE-A integrates a 2.2 nF ceramic capacitor internally within its UB package, eliminating the need for external decoupling. Only a load resistor (RL) is required externally to convert the two-wire current-source output into a measurable voltage signal at the ECU end.

How does the ASIL B safety functionality manifest in A19350LUBATN-RBE-A's output behavior?

When an internal fault is detected, A19350LUBATN-RBE-A enters a safe state and outputs either Error Protocol 1 (short 90 μs reset pulse for over-frequency faults) or Error Protocol 2 (3–6 ms reset pulse for hard failures like regulator or front-end faults). These distinguishable pulses allow the ECU to classify fault severity and initiate appropriate fail-safe actions per ISO 26262 requirements.

What magnetic target configurations are compatible with A19350LUBATN-RBE-A?

A19350LUBATN-RBE-A is designed for use with front-biased radial ring magnets having pole pitches from 1.4 mm to 8 mm. It supports differential sensing across GMR element pairs (E1–E3, E2–E4) spaced 1.4 mm apart and operates reliably with peak-to-peak differential fields ≥5 G and air gaps typical in wheel-speed applications (up to ~2.5 mm).

Can A19350LUBATN-RBE-A detect standstill and generate warning pulses?

Yes. As an -E variant, A19350LUBATN-RBE-A outputs warning pulses when differential magnetic amplitude falls below 10 Gpk-pk and generates a dedicated standstill pulse (1232–1656 μs wide) after 590–848 ms of no edge transitions. This enables ECU-level detection of stationary wheels or sensor detachment without requiring additional monitoring circuitry.