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Microchip Technology ATA5823C-PLQW-1
- Part No.:
- ATA5823C-PLQW-1
- Manufacturer:
- Microchip Technology
- Category:
- RF Transceiver ICs
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
ATA5823C-PLQW-1.pdf
- Description:
- IC RF TXRX ISM<1GHZ 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,321
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Product details
Overview
ATA5823C-PLQW-1 from Microchip Technology (formerly Atmel) is a highly integrated UHF ASK/FSK half-duplex transceiver for automotive keyless entry and tire pressure monitoring systems. It operates in the 313–316 MHz band, delivers up to 10 dBm output power, achieves –111.5 dBm ASK sensitivity at 10 kbit/s, and supports Manchester-coded data rates from 1 to 10 kbit/s (ASK) or 1 to 20 kbit/s (FSK).
For engineers reviewing the ATA5823C-PLQW-1 datasheet, ATA5823C-PLQW-1 pinout, ATA5823C-PLQW-1 application, or ATA5823C-PLQW-1 equivalent, this device offers verified low-IF receiver architecture, fractional-N synthesizer with 800 Hz RF resolution, SPI interface up to 500 kbit/s, RSSI output, and integrated XTAL capacitors - all in a 7 mm × 7 mm QFN48 package rated for –40°C to +105°C.
Technical Context
The ATA5823C-PLQW-1 implements a fully integrated low-IF receiver with 226 kHz IF, 30 dB image rejection, and 220 kHz system bandwidth, enabling compatibility with ATA5756 TPM transmitters. Its fractional-N synthesizer provides multi-channel operation with arbitrary channel spacing and compensates crystal tolerances without external components.
Transmit functionality uses closed-loop FSK modulation and PA switching for ASK, with programmable output power (0–10 dBm in 0.5 dB steps), integrated RX/TX switch, and single-ended RF I/O. Digital control logic includes FIFO-RAM buffering, self-polling, and protocol handling - reducing MCU overhead in passive entry go (PEG) and RKE systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Frequency | 313–316 MHz band - matches ATA5756-based TPM transmitters and avoids external VCO/PLL components. |
| Modulation Support | ASK and FSK - enables flexible use across RKE, PEG, and TPM protocols without hardware changes. |
| Max Output Power | 10 dBm - sufficient for car-side base station transmission with 4.4–5.25 V supply (VS2). |
| ASK Sensitivity | –111.5 dBm at 10 kbit/s - enables reliable reception from low-power key fobs using loop antennas. |
| Supply Voltage Range | 2.15–3.6 V (VS1) or 4.4–5.25 V (VS2) - supports dual-voltage system designs including lithium coin cell and automotive 5 V rails. |
| Interface | SPI up to 500 kbit/s - allows direct connection to low-cost 4-/8-bit MCUs without high-speed peripherals. |
| Temperature Range | –40°C to +105°C - qualified for under-hood and key fob environments per AEC-Q100 requirements. |
Pinout & Package
ATA5823C-PLQW-1 is housed in a 7 mm × 7 mm QFN48 package with exposed thermal pad (GND). Pin functions are validated per Atmel/Microchip datasheet 4829G–RKE–01/15, including dedicated RF_IN/RF_OUT, XTAL1/XTAL2, SPI signals (CS, SCK, SDI_TMDI, SDO_TMDO), IRQ, CLK, RSSI, and power management pins (PWR_ON, N_PWR_ON, RX_ACTIVE).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RF_IN | RF input | Single-ended LNA input; impedance matched to 50 Ω via external LC network for optimal sensitivity. |
| RF_OUT | RF output | Single-ended PA output; supports loop or PCB antenna with integrated RX/TX switch. |
| XTAL1 / XTAL2 | Crystal oscillator terminals | Connects to 13.25311 MHz crystal; internal load capacitors eliminate external caps. |
| CS / SCK / SDI_TMDI / SDO_TMDO | SPI interface | Full-duplex serial control at ≤500 kbit/s; CS_POL/SCK_POL/SCK_PHA configure timing polarity and phase. |
| RSSI | Received signal strength indicator | Analog voltage output proportional to input signal level - used for link quality assessment and adaptive thresholding. |
| IRQ | Interrupt request | Active-low open-drain signal indicating packet reception, TX completion, or error condition. |
| PWR_ON / N_PWR_ON | System wake-up inputs | Active-high and active-low inputs enabling ultra-low-power mode (<10 nA) with button-triggered wake-up. |
Key Features
| Feature | Design Value |
|---|---|
| Low-IF receiver architecture | 226 kHz IF with 30 dB image rejection and 220 kHz bandwidth - eliminates need for external SAW filter in key fob designs. |
| Fractional-N synthesizer | 800 Hz RF frequency resolution and automatic XTAL tolerance compensation - enables precise channel alignment without calibration. |
| Digital control logic with FIFO | On-chip RAM buffers RX/TX data and handles Manchester encoding/decoding - offloads crypto and protocol tasks from host MCU. |
| Integrated power management | Typical power-down current <10 nA and dual supply rails (VS1/VS2) - extends battery life in key fobs and supports automotive 5 V systems. |
| Robust RF front-end | ±2.5 kV HBM ESD protection, 55.5 dBc blocking at ±750 kHz, and –30 dBm I1dB compression point - ensures operation in noisy automotive environments. |
Applications
| Automotive Keyless Entry (RKE) | Tire Pressure Monitoring (TPM) |
|---|---|
Use Scenario: Bidirectional communication between vehicle ECU and handheld key fob for door unlock/lock and engine start authorization. IC Role / Device Role / Timing Role: ATA5823C-PLQW-1 serves as the primary UHF transceiver in the key fob, handling ASK/FSK demodulation, protocol framing, and secure challenge-response exchange. Use Value: Enables fast (<100 ms) arbitration and relay-attack-resistant PEG systems using only a low-cost 4-/8-bit MCU clocked by the device's 4.5 MHz CLK output. | Use Scenario: Wireless transmission of tire pressure, temperature, and ID data from wheel-mounted sensors to vehicle receiver. IC Role / Device Role / Timing Role: ATA5823C-PLQW-1 acts as the car-side receiver for ATA5756-based TPM transmitters operating at 315 MHz, supporting wide frequency offset tolerance (±75 kHz). Use Value: Eliminates need for external SAW filters while maintaining robust reception despite crystal aging, temperature drift, and transmitter frequency deviation. |
| Passive Entry Go (PEG) | Remote Control Systems |
Use Scenario: Hands-free vehicle access where driver proximity triggers automatic door unlocking without pressing buttons. IC Role / Device Role / Timing Role: ATA5823C-PLQW-1 manages low-latency bidirectional polling, encrypted handshake, and antenna field detection in both key fob and vehicle modules. Use Value: Integrated self-polling logic and FIFO buffering reduce MCU processing load, allowing standard microcontrollers to meet strict sub-100 ms response deadlines. | Use Scenario: Short-range wireless control of garage doors, lighting, HVAC, or industrial actuators in home and building automation. IC Role / Device Role / Timing Role: ATA5823C-PLQW-1 provides reliable ASK/FSK link layer in remote transmitters and receivers, supporting Manchester and transparent modes for custom protocols. Use Value: Minimal external components (1 crystal, ~10 passives) and single-ended RF design simplify PCB layout and lower BOM cost versus discrete RF solutions. |
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 |
|---|---|---|---|
| ATA5782C-PLQW-1 | Lower integration: no integrated XTAL capacitors, no FIFO buffer, no self-polling logic; requires external loop filter and SAW for same sensitivity. | Targeted at cost-sensitive RKE transmitters only; lacks full bidirectional protocol support for PEG/TPM. | Select when system uses external MCU with full protocol stack and minimal RF integration is acceptable. |
| SI4362-B1B-FMR | Higher data rate (up to 1 Mbps), wider frequency range (142–1050 MHz), but no native Manchester support; requires external crystal load caps and higher MCU overhead. | Better suited for proprietary ISM-band telemetry or smart metering; not optimized for automotive RKE/TPM timing constraints. | Select when multi-band flexibility or higher throughput outweighs automotive qualification and low-MCU-footprint advantages of ATA5823C-PLQW-1. |
Compared with ATA5782C-PLQW-1 and SI4362-B1B-FMR, the ATA5823C-PLQW-1 delivers superior system-level integration for automotive RKE/PEG/TPM - including on-chip FIFO, self-polling, crystal compensation, and SAW-free operation - reducing total component count and MCU resource demand.
Availability
ATA5823C-PLQW-1 is available at Aetrix Electronics and suitable for automotive keyless entry, tire pressure monitoring, passive entry go, and remote control systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ATA5823C-PLQW-1 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 legacy ATA5xxx transceiver family, providing long-term product availability, automotive-grade qualification, and technical documentation.
The ATA5823C-PLQW-1 belongs to Microchip's UHF RF transceiver product line, designed specifically for secure, low-power, bidirectional wireless communication in automotive access and sensor telemetry applications.
FAQ
What is the operating frequency band supported by the ATA5823C-PLQW-1?
The ATA5823C-PLQW-1 is specified for the 313–316 MHz band, making it compatible with ATA5756-based tire pressure monitoring transmitters and regional RKE systems. It does not support the 433–435 MHz band - that function is assigned to the ATA5824 variant. The device achieves this without external VCO or PLL components due to its integrated fractional-N synthesizer.
Does the ATA5823C-PLQW-1 require external crystal load capacitors?
No, the ATA5823C-PLQW-1 integrates load capacitors for the XTAL1/XTAL2 interface, eliminating the need for external crystal tuning capacitors. This reduces bill-of-materials count and improves production yield consistency. The internal capacitors are optimized for standard 13.25311 MHz fundamental-mode crystals used in automotive RKE and TPM applications.
How does the ATA5823C-PLQW-1 handle frequency offset between transmitter and receiver?
The ATA5823C-PLQW-1 incorporates an internal automatic frequency correction circuit in the FSK demodulator that tracks input frequency deviations up to ±75 kHz. This enables reliable communication despite crystal aging, temperature drift, and manufacturing tolerances - critical for interoperability with ATA5756 TPM transmitters and key fob RKE systems without requiring external calibration.
What is the maximum data rate supported by the ATA5823C-PLQW-1 in ASK mode?
The ATA5823C-PLQW-1 supports ASK data rates from 1 kbit/s to 10 kbit/s using Manchester coding. At 10 kbit/s, it achieves –111.5 dBm sensitivity (BER = 10⁻³) at 315 MHz. Higher rates are not supported in ASK mode; FSK mode extends to 20 kbit/s, but ASK is limited to 10 kbit/s per the validated electrical characteristics in the official datasheet.
Can the ATA5823C-PLQW-1 operate from a lithium coin cell battery?
Yes, the ATA5823C-PLQW-1 supports a 2.15–3.6 V supply range (VS1 rail), making it compatible with CR2032 lithium coin cells. In power-down mode, it draws less than 10 nA, and its low RX current (as low as 8.2 mA at 2.15 V/–40°C) maximizes battery life in key fob applications. The device also includes dedicated wake-up inputs (PWR_ON/N_PWR_ON) for button-initiated activation.
ATA5823C-PLQW-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- TxRx Only
- RF Family/Standard:
- General ISM < 1GHz
- Protocol:
- -
- Modulation:
- ASK, FSK
- Frequency:
- 433MHz
- Data Rate (Max):
- 20kbps
- Power - Output:
- 11.5dBm
- Sensitivity:
- -117dBm
- Memory Size:
- -
- Serial Interfaces:
- SPI
- GPIO:
- -
- Voltage - Supply:
- 3.6V
- Current - Receiving:
- 14.5mA
- Current - Transmitting:
- 21mA
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 48-QFN (7x7)
ATA5823C-PLQW-1 FAQ
1.How can I place an order for ATA5823C-PLQW-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ATA5823C-PLQW-1 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 ATA5823C-PLQW-1 reliable?
The price and inventory of ATA5823C-PLQW-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATA5823C-PLQW-1 is usually 5 days.
3.What payment methods are accepted for ATA5823C-PLQW-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATA5823C-PLQW-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATA5823C-PLQW-1?
ATA5823C-PLQW-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATA5823C-PLQW-1 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 ATA5823C-PLQW-1?
For technical support, including ATA5823C-PLQW-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATA5823C-PLQW-1 requirements.
6.How does Aetrix verify that ATA5823C-PLQW-1 is sourced from the original manufacturer or authorized distributors?
All ATA5823C-PLQW-1 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 ATA5823C-PLQW-1 meets industry standards.
7.What is the process for return or replacement of ATA5823C-PLQW-1?
All ATA5823C-PLQW-1 units undergo pre-shipment inspection (PSI). If there is an issue with ATA5823C-PLQW-1, 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 ATA5823C-PLQW-1 part is unused and in its original packaging.
Return procedure for ATA5823C-PLQW-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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