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Microchip Technology ATA5833-WNQW
- Part No.:
- ATA5833-WNQW
- Manufacturer:
- Microchip Technology
- Category:
- RF Transceiver ICs
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ATA5833-WNQW.pdf
- Description:
- IC RF TXRX+MCU ISM<1GHZ 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,491
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Product details
Overview
ATA5833-WNQW from Microchip Technology (formerly Atmel) is a highly integrated UHF ASK/FSK transceiver with embedded AVR® microcontroller core, designed for low-power remote keyless entry and tire pressure monitoring systems. It operates across 310–477MHz and 836–956MHz bands, delivers –122.5dBm FSK sensitivity at 0.75Kbit/s, supports fractional-N PLL with 93Hz/185Hz frequency resolution, and achieves 5nA typical OFFMode current.
For engineers reviewing the ATA5833-WNQW datasheet, ATA5833-WNQW pinout, ATA5833-WNQW application, or ATA5833-WNQW equivalent, this page provides verified technical context, real-world operating mode behavior, SPI-configurable service/channel architecture, RF performance metrics per modulation/data rate, and validated alternative transceivers for RKE/TPMS system design.
Technical Context
The ATA5833-WNQW implements a low-IF receiver architecture with double quadrature demodulation and digitized IF processing, enabling 55dB image rejection at 315MHz and 64dB blocking at 1MHz offset. Its closed-loop fractional-N modulator supports Gauss-shaped ASK/FSK transmission with programmable output power (–12dBm to +14.5dBm in 0.4dB steps) and FSK deviation from ±0.375kHz to ±93kHz.
It features a service-based configuration model: three EEPROM-stored services (fixed) and two SRAM-resident services (modifiable on-the-fly via SPI), each supporting three channels. The device uses 1024-byte EEPROM for persistent configuration, 1KB SRAM for runtime parameter storage, and relies entirely on 24KB firmware ROM - no user flash or ROM - distinguishing it from ATA5831/ATA5832 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Frequency Bands | 310–318MHz, 418–477MHz (low-band); 836–956MHz (high-band); crystal-tuned at 315.00/433.92/868.30/915.00MHz |
| Modulation Support | ASK and FSK with mixed-telegram capability; Manchester or NRZ coding; non-byte-aligned data handling |
| Receiver Sensitivity | –122.5dBm at 0.75Kbit/s FSK (Δf = ±0.75kHz, BWIF = 25kHz); –125dBm at 0.5Kbit/s ASK |
| Transmit Output Power | Programmable from –12dBm to +14.5dBm in 0.4dB steps; supports ARIB STD-T96 0dBm class |
| Power Consumption | 9.8mA RXMode (low-band); 9.4–13.8mA TXMode; 5nA typical OFFMode (≤600nA max @ 3.6V/85°C) |
| Data Rate Range | 0.5Kbit/s to 80Kbit/s (buffered mode); up to 120Kbit/s NRZ; supports pattern-based wake-up and start-of-frame detection |
| Supply Voltage | 1.9–3.6V or 2.4–5.5V dual-range operation; internal LDO supplies PA at 2.2V/3.0V on VS_PA pin |
| Temperature Range | –40°C to +105°C industrial grade; qualified for automotive RKE/TPMS environments |
Pinout & Package
ATA5833-WNQW is housed in a 5×5mm QFN32 package with 0.5mm pitch and wettable flanks, pin-to-pin compatible with ATA5830N and ATA5780N. The exposed die pad serves as analog ground (AGND) and must be soldered to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RFIN_LB / RFIN_HB | LNA inputs | Separate analog RF inputs for low-band (<500MHz) and high-band (>500MHz); select based on target frequency |
| SPDT_ANT | Antenna interface | 50Ω single-port antenna connection for both RX and TX; matched to internal SPDT switch |
| ANT_TUNE | Tuning control | Drives integrated varactor for automatic loop antenna resonance tuning at TX frequency |
| RF_OUT | PA output | Delivers modulated RF signal to antenna; requires DC path via matching network |
| PB6 (EVENT) | Digital flag | Firmware-controlled interrupt signal to external MCU indicating telegram reception or service event |
| PC1–PC5 / PB4 | Wake-up inputs | NPWRONx pins with internal 50kΩ pull-ups; PB4 is PWRON (active-high) for immediate wake from OFFMode |
| SPI (PB0–PB5) | Serial interface | Full-duplex SPI (SCK/MOSI/MISO/NSS) at up to 500Kbit/s for configuration and FIFO access |
| XTAL1/XTAL2 | Oscillator interface | Connects to 24.305MHz crystal; load capacitors integrated internally to minimize BOM |
Key Features
| Feature | Design Value |
|---|---|
| Service-based configuration | Five total services (3 EEPROM + 2 SRAM); each with 3 channels; enables concurrent multi-frequency, multi-protocol scanning |
| Autonomous polling | Configurable timing/order of channel checks; sleep between polls reduces average current to sub-µA levels |
| Digital RSSI | ±1dB relative accuracy via digitized IF processing; supports dynamic thresholding per channel |
| Antenna diversity | Internal SPDT switch + GPIO-controlled external SPDT; enables robust reception in varying RF environments |
| ASK shaping | Gauss filtering reduces spectral bandwidth of PA output, easing compliance with EN 300 220/FCC Part 15 |
| On-chip calibration | Self-check of VCO, FRC oscillator, antenna tuning, and temperature sensor; no external test equipment required |
Applications
| Remote Keyless Entry (RKE) | Tire Pressure Monitoring System (TPMS) |
|---|---|
Use Scenario: Battery-powered key fob transmitting door lock/unlock commands to vehicle receiver. IC Role / Device Role / Timing Role: Standalone transceiver handling ASK/FSK modulation, wake-on-button, low-duty-cycle polling, and secure frame validation. Use Value: 5nA OFFMode current extends lithium coin-cell life beyond 5 years; integrated antenna tuning eliminates manual calibration during manufacturing. | Use Scenario: Wheel-mounted sensor transmitting tire pressure/temperature data at 315MHz or 433.92MHz. IC Role / Device Role / Timing Role: Ultra-low-power transceiver performing periodic burst transmission with wake-on-RF or timer-triggered reporting. Use Value: –122.5dBm sensitivity at 0.75Kbit/s ensures reliable reception under high vehicle body attenuation; 105°C rating supports under-wheel operation. |
| Passive Entry Go (PEG) | Garage Door Opener |
Use Scenario: Vehicle-side receiver detecting proximity of authenticated key fob without user button press. IC Role / Device Role / Timing Role: Always-on polling receiver scanning multiple frequencies/channels for encrypted wake-up patterns. Use Value: Dual-path parallel search capability allows simultaneous ASK/FSK detection; configurable Rx-IF bandwidth (25–366kHz) optimizes SNR vs. interference rejection. | Use Scenario: Handheld remote controlling garage door motor using 315MHz or 433.92MHz ISM band. IC Role / Device Role / Timing Role: Transmitter with programmable output power (+10dBm typical) and ASK shaping for FCC/EN regulatory compliance. Use Value: Pre-emphasis and Gauss shaping reduce out-of-band emissions; support for non-byte-aligned data enables legacy protocol compatibility. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar UHF ASK/FSK transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATA5830N-SSHQ | Legacy pin-compatible predecessor; lacks fractional-N PLL, lower sensitivity (–118dBm), no digital RSSI | Supports basic RKE but not advanced polling or mixed-modulation telegrams | Choose only for cost-sensitive legacy redesigns where firmware and layout reuse outweigh performance loss. |
| SI4463-B1B-FMR | Higher data rate (1Mbps), better sensitivity (–133dBm), integrated DC-DC converter; different pinout and SPI register map | Requires PCB redesign and full firmware porting; suited for next-gen TPMS with extended range or OTA updates | Select when migrating to higher-performance, software-defined radio architecture with longer development timeline. |
Compared with ATA5830N-SSHQ, ATA5833-WNQW delivers superior sensitivity, finer frequency resolution, and autonomous service management - critical for multi-channel PEG systems. Versus SI4463-B1B-FMR, it offers drop-in compatibility with existing Atmel-based designs but trades peak RF performance for proven integration and lower system-level validation effort.
Availability
ATA5833-WNQW is available at Aetrix Electronics and suitable for remote keyless entry, tire pressure monitoring, and passive entry go systems requiring stable component supply, long-term lifecycle assurance, and automotive-grade reliability.
Supply support for ATA5833-WNQW 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 maintains full support for the ATA583x family. The company specializes in microcontrollers, analog, and wireless solutions for automotive, industrial, and consumer markets.
The ATA5833-WNQW belongs to Microchip's UHF transceiver product line, engineered specifically for ultra-low-power, multi-protocol RKE and TPMS applications where firmware-defined flexibility and regulatory compliance are essential.
FAQ
What memory architecture does the ATA5833-WNQW use?
The ATA5833-WNQW contains 24KB of firmware ROM for RF/baseband/microcontroller functions but no user-accessible flash or ROM memory. Unlike ATA5831 (20KB flash) or ATA5832 (20KB ROM), ATA5833-WNQW relies solely on factory-programmed firmware - making it ideal for fixed-function, high-volume deployments where customization is unnecessary. All configuration resides in 1024-byte EEPROM and 1KB SRAM.
Does the ATA5833-WNQW support both ASK and FSK modulation simultaneously?
Yes, the ATA5833-WNQW supports mixed ASK/FSK telegrams within a single receive session. Its dual-path receiver architecture enables parallel demodulation - one path optimized for ASK, another for FSK - allowing simultaneous detection of different modulation types across configured channels. This capability is essential for backward-compatible RKE systems supporting legacy ASK fobs and newer FSK-enabled vehicles.
How does antenna tuning work on the ATA5833-WNQW?
The ATA5833-WNQW performs automatic antenna tuning at TX center frequency using an integrated varactor controlled via the ANT_TUNE pin. During TCMode calibration, the IC adjusts capacitance to resonate a PCB loop antenna precisely at the transmit frequency, compensating for manufacturing tolerances and environmental drift. No external tuning components or manual adjustment are required, reducing production test time and improving yield.
What is the role of the EVENT pin (PB6) on the ATA5833-WNQW?
The EVENT pin (PB6) on the ATA5833-WNQW is a firmware-configurable digital flag that signals external microcontrollers upon defined events - such as valid telegram reception, FIFO readiness, or service completion. It eliminates continuous SPI polling, enabling host MCUs to remain in deep sleep until needed. In RKE systems, this pin directly triggers wake-up of the main application processor only when a relevant RF command arrives.
Is the ATA5833-WNQW pin-to-pin compatible with earlier Atmel transceivers?
Yes, the ATA5833-WNQW is fully pin-to-pin and package-compatible with Atmel ATA5830N and ATA5780N devices. This includes identical QFN32 footprint, pin numbering, power sequencing, and SPI interface mapping. RF matching networks also maintain backward compatibility - meaning existing layouts can be reused without redesign, accelerating qualification and reducing NRE costs for upgrades to ATA5833-WNQW.
ATA5833-WNQW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- TxRx + MCU
- RF Family/Standard:
- General ISM < 1GHz
- Protocol:
- -
- Modulation:
- ASK, FSK
- Frequency:
- 315MHz, 434MHz, 868MHz, 915MHz
- Data Rate (Max):
- 120kbps
- Power - Output:
- 14.5dBm
- Sensitivity:
- -125dBm
- Memory Size:
- 24kB ROM
- Serial Interfaces:
- SPI
- GPIO:
- 2
- Voltage - Supply:
- 1.9V ~ 3.6V, 2.4V ~ 5.5V
- Current - Receiving:
- 9.8mA
- Current - Transmitting:
- 9.4mA ~ 13.8mA
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 32-QFN (5x5)
ATA5833-WNQW FAQ
1.How can I place an order for ATA5833-WNQW through Aetrix?
Please submit a Request for Quotation (RFQ) for ATA5833-WNQW 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 ATA5833-WNQW reliable?
The price and inventory of ATA5833-WNQW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATA5833-WNQW is usually 5 days.
3.What payment methods are accepted for ATA5833-WNQW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATA5833-WNQW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATA5833-WNQW?
ATA5833-WNQW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATA5833-WNQW 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 ATA5833-WNQW?
For technical support, including ATA5833-WNQW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATA5833-WNQW requirements.
6.How does Aetrix verify that ATA5833-WNQW is sourced from the original manufacturer or authorized distributors?
All ATA5833-WNQW 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 ATA5833-WNQW meets industry standards.
7.What is the process for return or replacement of ATA5833-WNQW?
All ATA5833-WNQW units undergo pre-shipment inspection (PSI). If there is an issue with ATA5833-WNQW, 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 ATA5833-WNQW part is unused and in its original packaging.
Return procedure for ATA5833-WNQW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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