My Inquiry
My Account
Microchip Technology ATA5702F1000M-WDQW
- Part No.:
- ATA5702F1000M-WDQW
- Manufacturer:
- Microchip Technology
- Category:
- RFID, RF Access, Monitoring ICs
- Package:
- -
- Datasheet:
-
ATA5702F1000M-WDQW.pdf
- Description:
- IC PASS ENTRY 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,681
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ATA5702F1000M-WDQW from Microchip Technology (formerly Atmel) is a monolithic Passive Entry/Passive Start (PEPS) key fob controller integrating AES-128 encryption, 3D low-frequency (125 kHz) wake-up and transponder functionality, and a fractional-N RF transmitter covering 310–318 MHz, 418–477 MHz, and 836–956 MHz bands. It delivers programmable RF output power from –12 dBm to +14.5 dBm, operates from 1.9 V to 4.2 V, and achieves 4.7 µA listening-mode current at 250 µVpp LF sensitivity - enabling long battery life in automotive smart key systems.
For engineers reviewing the ATA5702F1000M-WDQW datasheet, ATA5702F1000M-WDQW pinout, ATA5702F1000M-WDQW application, or ATA5702F1000M-WDQW equivalent, this device serves as a production-ready, CMMI-certified PEPS SoC with integrated AVR core (16/32 kB Flash), 3-channel simultaneous RSSI measurement (<2.4 ms), logarithmic LF field localization, and hardware-accelerated AES for both RF and LF cryptographic operations in OEM vehicle access systems.
Technical Context
The ATA5702F1000M-WDQW implements a dedicated 3D LF receiver architecture with independent X/Y/Z channel amplification, logarithmic RSSI conversion, and programmable sensitivity thresholds (100/250/500 µVpp). Its fractional-N PLL-based RF transmitter supports Manchester-coded data streams up to 80 kBit/s with 93 Hz / 185 Hz frequency resolution across three wideband ranges.
It embeds a hardened AVR microcontroller with 1 kB SRAM, 1/2 kB EEPROM, debugWire interface, SPI/I²C peripherals, and 19 GPIOs - all operating within an automotive temperature range of –40 °C to +105 °C. The device executes certified open immobilizer protocol stack firmware (32 kB system ROM) and supports LF bitrates of 1.95/3.9/7.8 kbit/s for interoperability with legacy base stations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Frequency Range | 310–318 MHz, 418–477 MHz, 836–956 MHz - covers global RKE/PEPS bands without external VCO tuning |
| RF Output Power | –12 dBm to +14.5 dBm - enables flexible link budget design for >300 m remote start or localized entry detection |
| LF Sensitivity (RSSI) | 100 µVpp worst-case - supports reliable 3D wake-up and spatial localization even under coil misalignment |
| Listening Current | 4.7 µA at 250 µVpp sensitivity - extends coin-cell battery life to multi-year operation in passive entry applications |
| LF Bitrate Support | 1.95 / 3.9 / 7.8 kbit/s - ensures compatibility with major OEM immobilizer base stations (e.g., ATA5291, ATA5279C) |
| Core Memory | 16 kB / 32 kB user Flash + 32 kB system firmware ROM - hosts full RF/LF protocol stacks and customer application code |
| Supply Voltage | 1.9 V to 4.2 V - accommodates aging alkaline or lithium coin cells without external regulation |
Pinout & Package
ATA5702F1000M-WDQW is housed in a wettable-flank QFN38 package (5 mm × 7 mm, 0.5 mm pitch), optimized for high-density key fob PCB layouts and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Core power supply | 1.9–4.2 V input for digital and analog domains; decoupling required per layout guidelines |
| VBAT | Battery monitoring input | Analog input for battery voltage supervision and low-battery warning generation |
| CBUF | LF coil buffer output | Drives external 125 kHz antenna coil; supports 3D X/Y/Z axis sensing via dedicated pins |
| RF- | RF differential output | Differential RF output for loop antenna connection; requires matching network for 50 Ω system |
| SPI_MOSI / MISO / SCLK | Serial peripheral interface | Configures LF/RF parameters, reads RSSI values, and loads cryptographic keys during initialization |
| LFEVENT | LF wake-up interrupt | Asserts <2 ms after valid LF field detection - triggers fast exit from ultra-low-power listening mode |
Key Features
| Feature | Design Value |
|---|---|
| 3D LF RSSI measurement | Simultaneous X/Y/Z channel sampling in <2.4 ms enables precise proximity and orientation detection for walk-away lock/unlock |
| Logarithmic RSSI scaling | Provides linear distance estimation over >40 dB dynamic range - critical for trunk separation and inside/outside vehicle discrimination |
| Programmable LF sensitivity | Three selectable thresholds (100/250/500 µVpp) allow trade-off between wake-up latency and battery lifetime per vehicle zone |
| Hardware AES-128 engine | Accelerates cryptographic operations for both RF challenge-response and LF immobilizer authentication - no software overhead |
| Fractional-N PLL resolution | 93 Hz / 185 Hz step size enables precise channel placement in congested ISM bands and compliance with regional spectral masks |
| Integrated temperature sensor | Monitors die temperature for RF power compensation and LF gain calibration - maintains performance across –40 °C to +105 °C |
Applications
| Vehicle Proximity Detection | Passive Engine Start Authorization |
|---|---|
|
Use Scenario: Key fob enters defined perimeter around vehicle doors or trunk, triggering automatic unlock or lighting activation. IC Role / Device Role / Timing Role: ATA5702F1000M-WDQW acts as 3D LF field strength analyzer and spatial classifier - measuring vector magnitude and gradient across X/Y/Z axes to distinguish outside vs. inside location. Use Value: Enables approach lighting and door handle illumination without mechanical button press, using only <4.7 µA average current in listening mode. |
Use Scenario: Driver presses "start" button while key fob is inside cabin; system verifies presence, orientation, and cryptographic authenticity before enabling ignition. IC Role / Device Role / Timing Role: ATA5702F1000M-WDQW performs bidirectional LF authentication with vehicle base station (e.g., ATA5291), then transmits encrypted RF confirmation via its fractional-N transmitter. Use Value: Achieves sub-2.4 ms wake-up latency and secure AES-128 session key exchange - meeting OEM requirements for <300 ms total start sequence time. |
| Remote Start Command Execution | Smart Key Immobilizer Handshake |
|
Use Scenario: User initiates engine warm-up remotely via key fob button; vehicle validates command and starts engine without physical key insertion. IC Role / Device Role / Timing Role: ATA5702F1000M-WDQW functions as high-link-budget RF transmitter - delivering up to +14.5 dBm output power at 433.92 MHz with Manchester encoding. Use Value: Supports >300 m line-of-sight range with standard loop antenna, eliminating need for external PA stages or complex matching networks. |
Use Scenario: During vehicle startup, key fob and immobilizer base station (e.g., ATA5291) perform mutual authentication using open-source Atmel protocol stack. IC Role / Device Role / Timing Role: ATA5702F1000M-WDQW executes CMMI-certified immobilizer firmware from 32 kB ROM, performing AES-128 encryption on challenge/response frames with protected key storage. Use Value: Provides tamper-resistant memory protection and dual 128-bit secret keys - satisfying ISO 14229 and UNECE R116 cybersecurity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PEPS key fob controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATA5791 | Same AVR core and 3D LF architecture but fixed 300–450 MHz RF band; lower max RF power (+12.5 dBm); QFN38 package | Targeted for regional 315/433 MHz deployments only; lacks 868/915 MHz support and fine PLL resolution (93 Hz) | Select ATA5791 for cost-sensitive 433 MHz-only programs where global band coverage is not required. |
| ATA5703 | ROM-based variant of same Primus2+ family; identical LF/RF specs and pinout but 16/32 kB mask-ROM instead of Flash | Used in high-volume production where firmware is finalized and field updates are unnecessary | Choose ATA5703 when firmware is locked and flash reprogramming capability is not needed - reduces BOM cost and security attack surface. |
Compared with ATA5791 and ATA5703, the ATA5702F1000M-WDQW provides broader RF band coverage (including 868/915 MHz), finer fractional-N PLL resolution (93 Hz), and Flash-based field-upgradable firmware - making it the preferred choice for global multi-band PEPS platforms requiring long-term software maintainability.
Availability
ATA5702F1000M-WDQW is available at Aetrix Electronics and suitable for automotive passive entry, remote start, and immobilizer authentication systems requiring stable component supply, AEC-Q100 Grade 2 qualification, and long-term lifecycle support.
Supply support for ATA5702F1000M-WDQW 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
Microchip Technology acquired Atmel in 2016 and continues its automotive car access IC portfolio, maintaining design resources, qualification standards, and application support for legacy Atmel devices.
The ATA5702F1000M-WDQW belongs to the Primus2+ PEPS controller family, engineered specifically for single-chip smart key solutions combining 3D LF wake-up, AES-128 crypto, and multi-band RF transmission in space-constrained key fobs.
FAQ
What is the operating temperature range for the ATA5702F1000M-WDQW?
The ATA5702F1000M-WDQW is qualified for automotive use across –40 °C to +105 °C ambient temperature. This range is validated per AEC-Q100 Grade 2 requirements and covers under-hood, door handle, and interior key fob deployment conditions. Internal temperature compensation logic adjusts LF gain and RF output power to maintain specification compliance throughout this range. The ATA5702F1000M-WDQW integrates a calibrated on-die temperature sensor used by firmware for real-time correction.
Does the ATA5702F1000M-WDQW support the open-source Atmel immobilizer protocol stack?
Yes, the ATA5702F1000M-WDQW executes the CMMI-certified open-source immobilizer protocol stack from Atmel (now Microchip), stored in its 32 kB system ROM. This stack implements AES-128 encryption, configurable challenge/response lengths (32–128 bits), CRC frame protection, and interoperability with base stations like ATA5291 and ATA5279C. The ATA5702F1000M-WDQW supports both unidirectional and bidirectional LF authentication modes as defined in the publicly available Atmel documentation.
What RF data rates and modulation formats does the ATA5702F1000M-WDQW support?
The ATA5702F1000M-WDQW supports Manchester-coded ASK/FSK data streams up to 80 kBit/s. It natively handles standard RKE/PEPS bitrates including 1.95 kbit/s, 3.9 kbit/s, and 7.8 kbit/s for LF communication, and 1–80 kBit/s for RF transmission. Modulation is fixed to ASK for RKE and FSK for bidirectional RF links, with configurable deviation (±0.75 kHz to ±20 kHz) and IF bandwidth settings. The ATA5702F1000M-WDQW does not support OOK or PSK modulation.
How many GPIOs are available on the ATA5702F1000M-WDQW for customer peripheral interfacing?
The ATA5702F1000M-WDQW provides 19 general-purpose I/O pins, configurable as inputs, outputs, or alternate-function interfaces (SPI, I²C, debugWire). All GPIOs support wake-up interrupt capability and operate over the full 1.9–4.2 V supply range. These pins are electrically compatible with 3.3 V logic and include internal pull-ups. The ATA5702F1000M-WDQW reserves dedicated pins for LF coil drive (CBUF, X/Y/Z), RF differential output (RF+/RF–), and battery monitoring (VBAT), leaving 14 GPIOs available for LED drivers, button inputs, or sensor interfaces.
Is the ATA5702F1000M-WDQW pin-compatible with other devices in the Primus2+ family?
Yes, the ATA5702F1000M-WDQW shares identical QFN38 (5 mm × 7 mm) packaging, pin assignment, and electrical characteristics with ATA5700, ATA5701, and ATA5703. This allows hardware reuse across Flash-based (ATA5702/ATA5700) and ROM-based (ATA5703/ATA5701) variants. Firmware and layout can be shared, with differentiation handled solely through memory configuration and programmed features - simplifying platform development for multi-tier key fob strategies.
ATA5702F1000M-WDQW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Passive Entry/Start
- Frequency:
- -
- Standards:
- -
- Interface:
- SPI
- Voltage - Supply:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
ATA5702F1000M-WDQW FAQ
1.How can I place an order for ATA5702F1000M-WDQW through Aetrix?
Please submit a Request for Quotation (RFQ) for ATA5702F1000M-WDQW 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 ATA5702F1000M-WDQW reliable?
The price and inventory of ATA5702F1000M-WDQW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATA5702F1000M-WDQW is usually 5 days.
3.What payment methods are accepted for ATA5702F1000M-WDQW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATA5702F1000M-WDQW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATA5702F1000M-WDQW?
ATA5702F1000M-WDQW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATA5702F1000M-WDQW 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 ATA5702F1000M-WDQW?
For technical support, including ATA5702F1000M-WDQW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATA5702F1000M-WDQW requirements.
6.How does Aetrix verify that ATA5702F1000M-WDQW is sourced from the original manufacturer or authorized distributors?
All ATA5702F1000M-WDQW 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 ATA5702F1000M-WDQW meets industry standards.
7.What is the process for return or replacement of ATA5702F1000M-WDQW?
All ATA5702F1000M-WDQW units undergo pre-shipment inspection (PSI). If there is an issue with ATA5702F1000M-WDQW, 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 ATA5702F1000M-WDQW part is unused and in its original packaging.
Return procedure for ATA5702F1000M-WDQW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ATA5702F1000M-WDQW Tags
-
SL2S2602FTBX
NXP Semiconductors
-
ST25DV04K-IER6S3
STMicroelectronics
-
ST25DV04K-IER6C3
STMicroelectronics
-
LXMSJZNCMD-217
Murata Electronics
-
NT3H2111W0FTTJ
NXP Semiconductors
-
NT3H2111W0FHKH
NXP Semiconductors
-
M24LR04E-RMC6T/2
STMicroelectronics
-
ST25DV04KC-JF6D3
STMicroelectronics
-
ST25DV64KC-IE6S3
STMicroelectronics
-
ST25DV64K-IER6T3
STMicroelectronics
-
NT3H2211W0FTTJ
NXP Semiconductors
-
NT3H2211W0FHKH
NXP Semiconductors
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
