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Microchip Technology MICRF507YML-TR
- Part No.:
- MICRF507YML-TR
- Manufacturer:
- Microchip Technology
- Category:
- RF Transceiver ICs
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
MICRF507YML-TR.pdf
- Description:
- IC RF TXRX ISM<1GHZ 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,847
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Product details
Overview
MICRF507YML-TR from Micrel is a fully integrated 470–510 MHz FSK transceiver IC with +10 dBm power amplifier, integrated T/R switch, and Zero-IF I/Q receiver architecture. It delivers –113 dBm sensitivity at 2.4 kbps, operates from 2.0–2.5 V, draws 12 mA in receive mode and 21.5 mA at +10 dBm transmit, and targets China SRD-band automated meter reading (AMR) systems.
For engineers reviewing the MICRF507YML-TR datasheet, MICRF507YML-TR pinout, MICRF507YML-TR application, or MICRF507YML-TR equivalent, this page provides verified technical context, validated pin functions, real-world AMR/AMI use cases, confirmed alternatives with functional distinctions, and supply-ready availability details - all grounded in Micrel's Revision 2.2 datasheet and ordering documentation.
Technical Context
The MICRF507YML-TR implements a PLL-based frequency synthesizer with dual modulation paths: closed-loop VCO modulation supporting up to 200 kbps, and divider modulation capped at 20 kbps. Its receiver employs a zero-IF I/Q architecture with LNA (bypassable), Sallen-Key pre-filters, and six-pole elliptic switched-capacitor IF filters enabling 53 dB adjacent-channel rejection at ±500 kHz and 59 dB blocking at ±1 MHz.
The transmitter integrates an FSK modulator with seven-step PA gain control (–3.5 to +10 dBm), crystal tuning capability via XCOtune register, and Frequency Error Estimator (FEE) for RF calibration. System control uses a 3-wire serial interface (CS/SCLK/IO) managing 23 registers including carrier frequency, bit rate, filter bandwidth (50–350 kHz), and mode configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Range | 470–510 MHz - matches China Short Range Device (SRD) regulatory band; no external band-select components required. |
| Receiver Sensitivity | –113 dBm at 2.4 kbps (BER 10⁻³) - enables reliable reception in low-SNR AMR deployments with minimal infrastructure. |
| Transmit Output Power | +10 dBm max, adjustable in 7 steps down to –3.5 dBm - supports flexible range/power trade-offs without external PA control logic. |
| Supply Current | 12 mA RX / 21.5 mA TX (+10 dBm) / 280 µA standby / 0.2 µA power-down - enables battery-powered meter nodes with multi-year life. |
| Data Rate Support | Up to 200 kbps (VCO modulation) or 20 kbps (PLL divider modulation) - accommodates both high-throughput firmware updates and narrowband telemetry. |
| IF Filter Bandwidth | Programmable 50–350 kHz baseband bandwidth - allows dynamic optimization for noise immunity vs. symbol rate in varying channel conditions. |
| RSSI Range | 50 dB dynamic range (–110 to –60 dBm input) - provides robust link quality feedback for adaptive transmission power control. |
Pinout & Package
Package: Pb-free 32-pin QFN (5.0 mm × 5.0 mm × 0.85 mm), exposed paddle grounded per Micrel's recommended landing pattern.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 6, 7, RFGND | LNA/PA ground reference | Dedicated RF ground pins minimize coupling between PA output and LNA input; requires separate low-inductance connection to system ground plane. |
| 5, ANT | Antenna I/O node | Single-pin antenna interface with integrated T/R switch; eliminates need for external RF switch or duplexer in half-duplex AMR systems. |
| 14, RSSI | Analog output | 0.9–2.0 V analog voltage proportional to received signal strength over 50 dB range; directly interfaces to MCU ADC without scaling. |
| 15, LD | Open-drain status indicator | Active-low PLL lock detect; used for hardware synchronization of transmit enable timing and frequency stability verification. |
| 18, DATACLK | Bi-directional clock | Provides synchronous bit clock during RX/TX; enables precise data sampling and eliminates need for independent timing recovery circuitry. |
| 19, DATAIXO | Bi-directional data I/O | Half-duplex serial data path shared between RX and TX; reduces PCB routing complexity and pin count versus separate TXD/RXD lines. |
| 20–22, IO/SCLK/CS | 3-wire control interface | Standard SPI-like serial bus for register configuration; supports daisy-chaining with other Micrel devices sharing SCLK/IO under individual CS control. |
| 23–24, XTALIN/XTALOUT | Crytal oscillator terminals | Supports 16 MHz fundamental-mode crystal; internal tuning (XCOtune[4:0]) compensates for ppm drift across temperature and aging. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-IF I/Q receiver with DC-offset removal | Eliminates image-rejection filtering and IF transformers; simplifies BOM and layout while maintaining –113 dBm sensitivity. |
| Integrated +10 dBm PA with 7-step gain control | Enables programmable output power from –3.5 to +10 dBm using only register writes - no external DAC or bias network needed. |
| Crystal tuning via XCOtune register | Five-bit digital tuning adjusts crystal load capacitance to compensate for ±20 ppm frequency error - avoids manual capacitor selection. |
| FEE (Frequency Error Estimator) | Measures and reports RF carrier offset in real time; enables closed-loop frequency correction without external spectrum analyzer or test equipment. |
| 50–350 kHz programmable baseband bandwidth | Allows runtime adaptation of IF filter cutoff to match data rate and channel interference profile - improves BER in noisy urban deployments. |
| 280 µA standby current with crystal active | Permits rapid wake-up (<1 ms) from standby to RX/TX - critical for time-synchronized AMR polling cycles with strict latency budgets. |
Applications
| Smart Water Metering | Gas Meter Telemetry |
|---|---|
|
Use Scenario: Battery-powered ultrasonic water meters in residential clusters transmit hourly consumption data to neighborhood concentrators via mesh or star topology. IC Role / Device Role / Timing Role: MICRF507YML-TR serves as the sole RF transceiver, handling FSK modulation/demodulation, PA amplification, and RSSI-based link margin monitoring. Use Value: –113 dBm sensitivity ensures reliable reception at >1 km range through concrete walls; 280 µA standby current extends 10+ year battery life. |
Use Scenario: Industrial gas meters in explosion-hazard zones (ATEX Zone 1) require intrinsically safe wireless reporting every 15 minutes. IC Role / Device Role / Timing Role: MICRF507YML-TR operates in low-duty-cycle TX-only mode with crystal-stabilized 486 MHz carrier and 2.4 kbps encoding. Use Value: Integrated T/R switch and +10 dBm PA eliminate discrete RF front-end components; 0.2 µA power-down retains register state during sleep. |
| Electric AMI Sub-GHz Nodes | Wireless Heat Cost Allocator Networks |
|
Use Scenario: DIN-rail mounted electricity meters in multi-tenant buildings form self-healing sub-GHz networks compliant with China GB/T 31987-2015. IC Role / Device Role / Timing Role: MICRF507YML-TR implements synchronized TDMA slots using BITSYNC_CLK and DATACLK for collision-free channel access. Use Value: 200 kbps VCO modulation supports firmware OTA updates; 53 dB adjacent-channel rejection prevents interference from neighboring 470–510 MHz ISM devices. |
Use Scenario: European apartment heat cost allocators report thermal usage daily via low-power unlicensed band to building gateways. IC Role / Device Role / Timing Role: MICRF507YML-TR acts as a burst-mode transceiver, waking on timer interrupt to transmit encrypted 128-bit payload in <50 ms. Use Value: Programmable 50–350 kHz IF bandwidth adapts to local RF noise; RSSI feedback triggers automatic power backoff to meet ETSI EN 300 220-1 limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FSK transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MICRF506YML-TR | 410–450 MHz band; identical 32-pin QFN package, register map, and 2.0–2.5 V supply; same –113 dBm sensitivity and +10 dBm PA. | Targets EU 433 MHz SRD band instead of China 470–510 MHz; not compliant for Chinese AMR deployments requiring 470+ MHz operation. | Select MICRF506YML-TR only for 410–450 MHz regional certifications; MICRF507YML-TR is mandatory for GB/T-compliant China installations. |
| Si4432-B1B-FM | 433/868/915 MHz multi-band; higher +20 dBm PA; 120 dB dynamic range RSSI; requires external crystal load caps and PA matching network. | Broader global frequency support but larger footprint (40-QFN); lacks integrated T/R switch and crystal tuning - increases BOM and calibration effort. | Choose Si4432-B1B-FM for multi-region deployments needing >+10 dBm output; MICRF507YML-TR offers lower system cost and faster time-to-certification for China-specific AMR. |
Compared with MICRF506YML-TR, MICRF507YML-TR shifts operating band to meet China SRD mandates without altering power, sensitivity, or interface - making it a direct regional variant. Against Si4432-B1B-FM, MICRF507YML-TR trades output headroom and multi-band flexibility for integrated T/R switching, crystal tuning, and reduced external component count - optimizing for cost-sensitive, single-band AMR volume production.
Availability
MICRF507YML-TR is available at Aetrix Electronics and suitable for automated meter reading (AMR), advanced metering infrastructure (AMI), and wireless remote meter reading applications requiring stable component supply, long-term lifecycle assurance, and full traceability for utility-grade deployments.
Supply support for MICRF507YML-TR 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
Micrel Inc. was a U.S.-based semiconductor company specializing in analog, RF, and mixed-signal ICs for communications, industrial, and power management applications before its acquisition by Microchip Technology in 2015.
The MICRF507YML-TR belongs to Micrel's RadioWire® FSK transceiver family, designed specifically for low-power, license-free sub-GHz wireless telemetry in utility metering and sensor networks operating within regional SRD bands.
FAQ
What is the operating voltage range for the MICRF507YML-TR?
The MICRF507YML-TR operates from 2.0 V to 2.5 V supply voltage, with absolute maximum rating of +2.7 V. Operation outside this range risks damage or undefined behavior. The device draws 12 mA in receive mode and 21.5 mA at +10 dBm transmit under 2.5 V; current scales linearly with voltage, enabling predictable battery-life modeling for AMR nodes.
Does the MICRF507YML-TR support both FSK modulation methods described in the datasheet?
Yes, the MICRF507YML-TR supports two distinct FSK modulation paths: PLL divider modulation (up to 20 kbps) and closed-loop VCO modulation (up to 200 kbps). Selection is controlled via Modulation[1:0] bits in Register 1. VCO modulation provides higher data rates but requires careful loop filter design; divider modulation offers superior frequency stability at lower rates - both are fully implemented in the MICRF507YML-TR silicon.
How does the MICRF507YML-TR handle crystal frequency drift across temperature?
The MICRF507YML-TR incorporates a crystal tuning capability via the five-bit XCOtune[4:0] register (Address 0x09), allowing digital adjustment of the crystal load capacitance to compensate for frequency drift. This feature enables calibration to within ±20 ppm across –40°C to +85°C without external variable capacitors - a key enabler for stable 470–510 MHz operation in outdoor metering environments.
Can the MICRF507YML-TR be used without the integrated power amplifier?
Yes, the MICRF507YML-TR's PA can be disabled by setting PA[2:0] = 000 in Register 0, reducing transmit output to –15 dBm (typical) and current draw to 8.0 mA. In this mode, the ANT pin becomes a low-power RF output suitable for driving external high-efficiency PAs or baluns - preserving the receiver chain, RSSI, and FEE functionality while decoupling output power from internal PA limitations.
What is the function of the LD (Lock Detect) pin on the MICRF507YML-TR?
The LD pin on the MICRF507YML-TR is an open-drain output that asserts low when the PLL achieves frequency lock, indicating stable RF carrier generation. It is used to synchronize transmit enable timing and verify synthesizer readiness before data transmission. The lock time is 0.7 ms (3 kHz loop bandwidth) from 490 to 490.5 MHz - a critical parameter for time-slotted AMR protocols relying on rapid channel acquisition.
MICRF507YML-TR 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 Only
- RF Family/Standard:
- General ISM < 1GHz
- Protocol:
- -
- Modulation:
- FSK
- Frequency:
- 470MHz ~ 510MHz
- Data Rate (Max):
- 200kbps
- Power - Output:
- 10dBm
- Sensitivity:
- -113dBm
- Memory Size:
- -
- Serial Interfaces:
- SPI
- GPIO:
- -
- Voltage - Supply:
- 2V ~ 2.5V
- Current - Receiving:
- 8mA ~ 12mA
- Current - Transmitting:
- 8mA ~ 21.5mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 32-QFN (5x5)
MICRF507YML-TR FAQ
1.How can I place an order for MICRF507YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MICRF507YML-TR 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 MICRF507YML-TR reliable?
The price and inventory of MICRF507YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MICRF507YML-TR is usually 5 days.
3.What payment methods are accepted for MICRF507YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MICRF507YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MICRF507YML-TR?
MICRF507YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MICRF507YML-TR 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 MICRF507YML-TR?
For technical support, including MICRF507YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MICRF507YML-TR requirements.
6.How does Aetrix verify that MICRF507YML-TR is sourced from the original manufacturer or authorized distributors?
All MICRF507YML-TR 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 MICRF507YML-TR meets industry standards.
7.What is the process for return or replacement of MICRF507YML-TR?
All MICRF507YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MICRF507YML-TR, 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 MICRF507YML-TR part is unused and in its original packaging.
Return procedure for MICRF507YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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