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Home > Products > Sensors, Transducers > Position Sensors > Angle, Linear Position Measuring

Allegro MicroSystems A1339LLPTR-DD-T

Name: A1339LLPTR-DD-T
Brand: Allegro MicroSystems
SKU: A1339LLPTR-DD-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: A1339LLPTR-DD-T

Manufacturer:: Allegro MicroSystems

Category:: Angle, Linear Position Measuring

Package:: 24-TSSOP (0.173", 4.40mm Width) Exposed Pad

Datasheet:: A1339LLPTR-DD-T.pdf

Description:: SENSOR ANGLE 360DEG SMD

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Product details

Overview

A1339LLPTR-DD-T from Allegro MicroSystems is a dual-die, 360° contactless Hall-effect angle sensor IC with integrated diagnostics for ASIL D–compliant safety-critical systems. It delivers 12-/15-bit angular position data via SPI, ABI/UVW, or PWM outputs; supports up to 12,000 rpm magnet rotation; and operates across –40°C to 150°C with 4–16.5 V supply. Used in electronic power steering (EPS) and throttle actuation where redundancy and fault detection are mandatory.

For engineers reviewing the A1339LLPTR-DD-T datasheet, A1339LLPTR-DD-T pinout, A1339LLPTR-DD-T application, or A1339LLPTR-DD-T equivalent, this page provides verified technical context, dual-die package mapping, real-time diagnostic coverage details, and validated alternatives for automotive functional safety designs.

Technical Context

The A1339LLPTR-DD-T implements two independent SoC dies in a single 24-pin eTSSOP package, each with circular vertical Hall (CVH) front ends, dual-path digital signal processing (PLL + ZCD), and configurable EEPROM-based calibration. Its architecture enables simultaneous operation of redundant sensing channels with die-to-die matching optimized via stacked orientation.

It integrates ISO 26262–compliant hardware-level diagnostics including logic BIST (30 ms), CVH self-test (30 ms), 4-bit SPI CRC, ECC-protected EEPROM, and programmable wake-up thresholds (300–650 mV). Output interfaces include 10 MHz SPI, ABI/UVW with up to 8192 CPR, and PWM with 98 Hz–3.125 kHz carrier frequency.

Key Specifications

Parameter	Value and Actual Design Meaning
Angle Resolution	12-bit or 15-bit output via SPI register selection - enables trade-off between latency and precision in real-time control loops
Max Rotation Speed	12,000 rpm verified, 30,000 rpm simulated - supports high-speed EPS motor commutation without interpolation loss
Operating Temp Range	–40°C to 150°C - qualified for under-hood automotive environments per AEC-Q100
Supply Voltage	4.0 V to 16.5 V - direct connection to 12 V battery with ISO 7637-2 Pulse 5b tolerance up to 39 V
Diagnostic Coverage	ASIL D–capable with LBIST, CVH self-test, signal-path monitoring, and watchdogs - meets hardware safety requirements when used per Safety Manual
EEPROM Endurance	100 read/write cycles - sufficient for end-of-line calibration and field updates without wear-out risk
Low Power Mode Current	98 µA avg. (one die) - enables persistent motor position tracking during vehicle sleep states

Pinout & Package

Package: 24-pin eTSSOP (LP suffix), lead-free with 100% matte tin plating; exposed thermal pad for dissipation; dual independent SoCs with separate power/ground domains per die.

Pin/Terminal	Circuit Role	Design Meaning
CS_1/SA0_1, CS_2/SA0_2	SPI chip-select / Manchester ID LSB	Active-low enable for each die's SPI interface; also defines die ID in Manchester mode
SCLK_1, SCLK_2	SPI clock input	Supports up to 10 MHz clock - enables low-latency angle reads across both dies on shared bus
MOSI_1/SA1_1, MOSI_2/SA1_2	SPI data-in / Manchester ID MSB	Configurable as SPI input or Manchester ID bit; allows unique addressing in daisy-chain setups
MISO_1, MISO_2	SPI data-out	Independent serial outputs per die - eliminates arbitration delay in dual-sensor safety architectures
A_1/U_1, A_2/U_2, B_1/V_1, B_2/V_2, I_1/W_1, I_2/W_2	Quadrature or BLDC commutation outputs	Selectable ABI (encoder) or UVW (motor phase) format per die - supports redundant motor control
PWM_1, PWM_2	Pulse-width modulated angle output	Programmable 98 Hz–3.125 kHz carrier; 5–95% duty cycle maps 0°–360° - ideal for analog-compatible ECU inputs
WAKE_1, WAKE_2	External wake-up trigger	Programmable 300–650 mV threshold - enables precise low-power state transitions without host polling
VCC_1, VCC_2, GND_1, GND_2, BYP_1, BYP_2	Independent power domains	Dual regulator paths allow isolation between dies - critical for fault containment in ASIL D systems

Key Features

Feature	Design Value
Dual-die stacked construction	Reduces magnet misalignment impact on die-to-die matching vs. side-by-side layout - improves redundancy integrity at large air gaps
Configurable ABI/UVW resolution	Up to 8192 counts/rev (ABI) or 16 pole pairs (UVW) - selectable via EEPROM to match motor pole count or encoder resolution needs
On-chip ECC and CRC	Single-bit error correction + dual-bit detection in EEPROM; 4-bit CRC on all SPI frames - ensures data integrity in noisy automotive buses
Transport mode	60 µA supply current with sampling disabled - protects EEPROM and registers during shipping and storage
Manchester interface over VCC	Enables configuration using only VCC and PWM pins - eliminates need for dedicated programming lines in space-constrained modules

Applications

Electronic Power Steering (EPS)	Throttle Actuator Control
Use Scenario: Real-time rotor angle feedback for brushless DC motor torque control in column-assist EPS systems. IC Role / Device Role / Timing Role: Dual-die A1339LLPTR-DD-T provides redundant 360° angle measurement with <7 µs latency via UVW outputs and 1 MHz refresh rate. Use Value: Enables ASIL D–compliant motor control by delivering synchronized, independently verified angle data to two safety cores.	Use Scenario: Closed-loop position sensing for drive-by-wire throttle valves exposed to under-hood heat and vibration. IC Role / Device Role / Timing Role: A1339LLPTR-DD-T delivers 12-bit angle data over PWM (3.125 kHz) and SPI (10 MHz) with ±0.4° error at 150°C. Use Value: Maintains accuracy across full temperature range without external compensation, reducing calibration overhead in production.
PRNDL Rotary Selector	Electric Brake Booster
Use Scenario: Contactless gear position detection in rotary PRNDL switches requiring long-term reliability and zero mechanical wear. IC Role / Device Role / Timing Role: A1339LLPTR-DD-T uses ABI quadrature outputs (up to 8192 CPR) with programmable hysteresis (0–1.38°) to reject switch bounce. Use Value: Eliminates potentiometer drift and contact failure while supporting fail-safe position reporting via dual-die diagnostics.	Use Scenario: Motor angle feedback in electro-hydraulic brake boosters where fault detection must meet ASIL D requirements. IC Role / Device Role / Timing Role: A1339LLPTR-DD-T performs concurrent LBIST and CVH self-tests (≤50 ms total power-on time) before enabling control outputs. Use Value: Meets startup diagnostic coverage targets without adding external test circuitry or delaying system readiness.

Electronic Power Steering (EPS)

Throttle Actuator Control

Use Scenario: Real-time rotor angle feedback for brushless DC motor torque control in column-assist EPS systems.

IC Role / Device Role / Timing Role: Dual-die A1339LLPTR-DD-T provides redundant 360° angle measurement with <7 µs latency via UVW outputs and 1 MHz refresh rate.

Use Value: Enables ASIL D–compliant motor control by delivering synchronized, independently verified angle data to two safety cores.

Use Scenario: Closed-loop position sensing for drive-by-wire throttle valves exposed to under-hood heat and vibration.

IC Role / Device Role / Timing Role: A1339LLPTR-DD-T delivers 12-bit angle data over PWM (3.125 kHz) and SPI (10 MHz) with ±0.4° error at 150°C.

Use Value: Maintains accuracy across full temperature range without external compensation, reducing calibration overhead in production.

PRNDL Rotary Selector

Electric Brake Booster

Use Scenario: Contactless gear position detection in rotary PRNDL switches requiring long-term reliability and zero mechanical wear.

IC Role / Device Role / Timing Role: A1339LLPTR-DD-T uses ABI quadrature outputs (up to 8192 CPR) with programmable hysteresis (0–1.38°) to reject switch bounce.

Use Value: Eliminates potentiometer drift and contact failure while supporting fail-safe position reporting via dual-die diagnostics.

Use Scenario: Motor angle feedback in electro-hydraulic brake boosters where fault detection must meet ASIL D requirements.

IC Role / Device Role / Timing Role: A1339LLPTR-DD-T performs concurrent LBIST and CVH self-tests (≤50 ms total power-on time) before enabling control outputs.

Use Value: Meets startup diagnostic coverage targets without adding external test circuitry or delaying system readiness.

Equivalent & Alternatives

The following parts are listed as comparable options for similar angle sensor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AMS AS5055A-DSO	Single-die, 14-bit SPI-only output; no PWM or ABI/UVW; 105°C max ambient	Lacks dual-die redundancy and ASIL D support; limited to non-safety-critical position sensing	Choose for cost-sensitive, non-automotive applications where SPI-only interface suffices and temperature range ≤105°C
Infineon TLE5012B E1000	Single-die, 16-bit resolution; supports SENT and SPI; ASIL B certified (not D); 125°C max ambient	No dual-die architecture; lower diagnostic coverage; requires external safety monitor for ASIL D	Choose when higher resolution is prioritized over redundancy, and system-level safety architecture includes external validation

Compared with AMS AS5055A-DSO and Infineon TLE5012B E1000, the A1339LLPTR-DD-T uniquely delivers ASIL D–ready dual-die redundancy in one package, eliminating inter-IC synchronization complexity and PCB routing for safety-critical motor control.

Availability

A1339LLPTR-DD-T is available at Aetrix Electronics and suitable for electronic power steering (EPS), throttle actuation, and PRNDL rotary position sensing requiring stable component supply across automotive production lifecycles.

Supply support for A1339LLPTR-DD-T 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 of high-performance magnetic sensing and power ICs, headquartered in Manchester, NH, with deep expertise in automotive-grade Hall-effect technology.

The A1339 product line was developed specifically for ISO 26262–compliant safety-critical angle sensing, targeting EPS, transmission, and braking systems where dual-channel redundancy and on-chip diagnostics are mandatory.

FAQ

What is the maximum rotational speed supported by the A1339LLPTR-DD-T?

The A1339LLPTR-DD-T has been verified to track magnet rotation up to 12,000 rpm under test conditions and supports up to 30,000 rpm based on design simulation. Its 1 MHz angle refresh rate and <7 µs response time ensure accurate high-speed position capture for EPS and BLDC motor control applications. The A1339LLPTR-DD-T maintains 12-bit resolution and <1° error even at rated speeds.

How does the dual-die architecture of the A1339LLPTR-DD-T improve safety compliance?

The A1339LLPTR-DD-T integrates two electrically isolated SoC dies in one eTSSOP package, each with independent power, ground, and signal paths. This physical separation enables true hardware redundancy - allowing cross-checking of angle data and independent diagnostic execution (LBIST, CVH self-test) per die. When used per the A1339 Safety Manual, this architecture satisfies ASIL D requirements without external voting logic. The A1339LLPTR-DD-T's stacked die orientation further minimizes mismatch from magnet misalignment.

Can the A1339LLPTR-DD-T operate with a 5 V supply?

Yes, the A1339LLPTR-DD-T supports both 3.3 V and 5 V interface modes. The part number A1339LLPTR-DD-T is specified for 3.3 V interface, but the device itself accepts 4–16.5 V supply voltage and can be configured for 5 V digital I/O via EEPROM settings. Electrical specs for 5 V mode include VIH ≥ 3.75 V, VOH ≥ 4 V, and VOL ≤ 0.3 V on MISO/ABI/UVW pins. The A1339LLPTR-DD-T's internal regulator and bypass pins (BYP_1/BYP_2) adapt accordingly.

What diagnostic features are implemented in the A1339LLPTR-DD-T?

The A1339LLPTR-DD-T includes logic BIST (30 ms), circular vertical Hall self-test (30 ms), 4-bit SPI CRC, ECC-protected EEPROM with single-bit correction/dual-bit detection, programmable wake-up thresholds (300–650 mV), and signal-path monitoring. All diagnostics are hardware-enforced and documented in the A1339 Safety Manual. These features collectively achieve ASIL D–compliant diagnostic coverage when integrated per specification - a capability confirmed for the A1339LLPTR-DD-T in its dual-die configuration.

Is the A1339LLPTR-DD-T pin-compatible with other A1339 variants?

No, the A1339LLPTR-DD-T (24-pin eTSSOP, dual-die) is not pin-compatible with single-die variants like A1339LLETR-T (14-pin TSSOP). Pin counts, terminal assignments, and power domain segregation differ fundamentally. The A1339LLPTR-DD-T requires dedicated routing for two sets of SPI, ABI/UVW, PWM, and wake-up signals - reflecting its dual-die architecture. Migration between variants necessitates PCB redesign and firmware adaptation to manage independent die control.

A1339LLPTR-DD-T Specifications

Product attributes: Attribute value

Manufacturer:: Allegro MicroSystems

Package/Case:: 24-TSSOP (0.173", 4.40mm Width) Exposed Pad

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: -

For Measuring:: Angle

Technology:: Hall Effect

Rotation Angle - Electrical, Mechanical:: 0° ~ 360°, Continuous

Linear Range:: -

Output:: PWM, SPI

Output Signal:: Programmable

Actuator Type:: External Magnet, Not Included

Linearity:: -

Resistance:: -

Resistance Tolerance:: -

Voltage - Supply:: 4V ~ 16.5V

Mounting Type:: Surface Mount

Termination Style:: SMD (SMT) Tab

Operating Temperature:: -40°C ~ 150°C

Grade:: -

Qualification:: -

Supplier Device Package:: 24-TSSOP-EP

A1339LLPTR-DD-T FAQ

1.How can I place an order for A1339LLPTR-DD-T through Aetrix?

Please submit a Request for Quotation (RFQ) for A1339LLPTR-DD-T 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 A1339LLPTR-DD-T reliable?

The price and inventory of A1339LLPTR-DD-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A1339LLPTR-DD-T is usually 5 days.

3.What payment methods are accepted for A1339LLPTR-DD-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A1339LLPTR-DD-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for A1339LLPTR-DD-T?

A1339LLPTR-DD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your A1339LLPTR-DD-T 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 A1339LLPTR-DD-T?

For technical support, including A1339LLPTR-DD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A1339LLPTR-DD-T requirements.

6.How does Aetrix verify that A1339LLPTR-DD-T is sourced from the original manufacturer or authorized distributors?

All A1339LLPTR-DD-T 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 A1339LLPTR-DD-T meets industry standards.

7.What is the process for return or replacement of A1339LLPTR-DD-T?

All A1339LLPTR-DD-T units undergo pre-shipment inspection (PSI). If there is an issue with A1339LLPTR-DD-T, 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 A1339LLPTR-DD-T part is unused and in its original packaging.

Return procedure for A1339LLPTR-DD-T:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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