My Inquiry
My Account
NXP Semiconductors OL2381AHN/C0B,515
- Part No.:
- OL2381AHN/C0B,515
- Manufacturer:
- NXP Semiconductors
- Category:
- RF Transceiver ICs
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
OL2381AHN/C0B,515.pdf
- Description:
- IC RF TXRX ISM<1GHZ 32HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:996
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OL2381AHN/C0B,515 from NXP Semiconductors is a highly integrated single-chip sub-1 GHz RF transceiver for ISM/SRD bands (315/434/868/915 MHz), implementing low-IF direct-conversion RX and fractional-N PLL-based TX with ASK/FSK/GFSK modulation. It delivers programmable output power (−20 to +10 dBm), 16 mA RX current, 0.5 µA standby, and supports Manchester decoding, RSSI, and signal signature recognition - ideal for battery-powered telemetry in smart metering and RKE systems.
For engineers reviewing the OL2381AHN/C0B,515 datasheet, OL2381AHN/C0B,515 pinout, OL2381AHN/C0B,515 application, or OL2381AHN/C0B,515 equivalent, key selection considerations include its 32-pin HVQFN package, SPI-controlled operation, multi-band frequency agility, channel filter auto-calibration (50–300 kHz), and integrated VCO sub-band calibration for stable PLL lock time and phase noise across temperature.
Technical Context
The OL2381AHN/C0B,515 employs a near-zero-IF receiver architecture with on-chip quadrature downconversion to 300 kHz IF, followed by programmable channel filtering, limiter-based AM/FM demodulation, and digital baseband processing including clock recovery and Manchester decoding. Its automated signal signature recognition unit (SSRU) enables preamble pattern detection and multi-criteria wakeup (RSSI, modulation depth, baud rate).
Transmit functionality relies on a fully integrated fractional-N PLL with on-chip loop filter and VCO (1.20–1.856 GHz), enabling precise frequency hopping, crystal drift compensation, and loop modulation for FSK. The TX block integrates dual PA stages, output power regulation, and supports data rates up to 112 kchip/s with configurable ASK envelope control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Bands | 315 MHz, 434 MHz, 868 MHz, and 915 MHz ISM/SRD bands - enables global deployment without hardware change |
| Modulation Schemes | Programmable ASK, FSK, and GFSK - supports legacy ASK remote controls and higher-data-rate FSK/GFSK sensor networks |
| TX Output Power | −20 dBm to +10 dBm, stabilized by on-board PA regulator - ensures consistent range across battery voltage drop (2.1–3.6 V) |
| RX Current / Standby | 16 mA active RX current; 0.5 µA standby - extends coin-cell or lithium primary battery life to years in polling-mode applications |
| Channel Filter BW | 50 kHz to 300 kHz, auto-calibrated - maintains accurate cutoff and roll-off over process/temperature for bit rates 0.5 kbit/s–112 kchip/s |
| Polling Timer Accuracy | 2 % absolute accuracy - enables reliable low-power wake-up scheduling in wireless M-Bus and KNX-RF systems |
| Digital Interface | 3-wire or 4-wire SPI (SDIO/SCLK/SEN or SDIO/SCLK/SEN/SDO) - simplifies host MCU integration with minimal GPIO usage |
Pinout & Package
OL2381AHN/C0B,515 is housed in a 5 mm × 5 mm × 0.85 mm 32-pin HVQFN (SOT617-3) package with exposed die pad for thermal and ground reference. All GND pins (1, 8, 9, 16, 32) and the exposed pad connect to system ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 8, 9, 16, 32) | Ground reference | Multiple dedicated ground terminals plus exposed pad ensure low-impedance RF/analog/digital return paths and EMI suppression |
| RF_IN (Pin 7) | RX RF input | High-linearity resistive-feedback LNA input optimized for −102 dBm sensitivity at 434 MHz |
| RF_OUT (Pin 10) | TX RF output | Matched 50 Ω output driving external antenna or TX/RX switch; supports +10 dBm max with internal PA |
| SEN (Pin 17) | SPI enable | Active-low interface master enable; falling edge latches TX data; rising edge wakes device from power-down |
| SDIO (Pin 18) | SPI bidirectional data | Configurable as MOSI/MISO multiplexed line; supports auto-increment register access for efficient configuration |
| SCLK (Pin 19) | SPI clock | Edge-triggered clock supporting rising/falling-edge data capture; optionally carries recovered RX clock or TX baud clock |
| P10/DATA (Pin 20) | TX/RX data I/O | Configurable as TX data input, RX data output, or debug interface data - enables synchronous data transfer with P12/CLOCK |
| P11/INT (Pin 21) | Interrupt output | Active-low non-maskable interrupt signaling RX packet ready, TX complete, or error conditions |
| P12/CLOCK (Pin 22) | Reference/data clock | Default 1 MHz reference output; configurable as recovered RX clock or TX baud clock for synchronous host timing |
| P13/SDO (Pin 23) | SPI data output | Optional dedicated MISO pin enabling full 4-wire SPI mode - decouples command and data traffic from SDIO |
| XTAL1/XTAL2 (Pins 25/24) | Crystal oscillator inputs | Supports 16 MHz fundamental-mode crystal; internal amplitude control ensures stable oscillation across voltage/temperature |
| VREG_VCO/VREG_PLL/VREG_PA/VREG_DIG (Pins 2, 30, 11, 13) | Analog regulator outputs | On-die LDO outputs requiring local decoupling - isolate noise-sensitive VCO, PLL, PA, and digital domains |
Key Features
| Feature | Design Value |
|---|---|
| Integrated fractional-N PLL with on-chip loop filter | Enables multi-channel hopping and crystal drift compensation without external components - reduces BOM count and layout area |
| On-chip channel filter auto-calibration | Maintains stable 50–300 kHz bandwidth cutoff and roll-off across temperature - eliminates manual tuning and improves production yield |
| Signal Signature Recognition Unit (SSRU) | Combines RSSI threshold, modulation depth, and baud-rate classification to reject ambient noise and enable fast, reliable wakeup |
| Preamble Pattern Recognition (PPR) | Configurable 1–32 bit pattern detection - prevents false triggers in dense RF environments like building automation networks |
| Level-Sensitive Data (LSD) slicer | Self-adjusting threshold adapts to signal amplitude variations - improves BER in fading or low-SNR telemetry links |
| Ultra-low 0.5 µA standby current | Combined with 2 % accurate polling timer - achieves multi-year battery life in intermittent receive applications (e.g., water/gas meters) |
Applications
| Smart Metering (Wireless M-Bus) | Home Security & Automation (KNX-RF) |
|---|---|
|
Use Scenario: Battery-powered gas/water meters transmitting consumption data hourly via EN13757-compliant M-Bus frames at 868 MHz. IC Role / Device Role / Timing Role: Full transceiver handling RF front-end, demodulation, Manchester decoding, and RSSI-based signal validation - replaces discrete RF + MCU + codec solution. Use Value: Single-chip integration reduces PCB area by >40 %; auto-calibrated channel filter ensures compliant spectral mask across temperature; 0.5 µA standby enables 10+ year battery life. |
Use Scenario: Wireless KNX-RF actuators and sensors operating in European 868 MHz band with strict duty-cycle and emission limits. IC Role / Device Role / Timing Role: Sub-GHz transceiver executing EN50090-4-2 physical layer - performs automatic VCO sub-band selection, loop filter calibration, and preamble detection per KNX timing requirements. Use Value: ETSI EN300-220 compliance built-in; SSRU and PPR minimize false alarms from neighboring RF sources; 2 % polling timer accuracy meets KNX sleep/wakeup synchronization needs. |
| After-Market Remote Keyless Entry (RKE) | Wireless Sensor Networks |
|
Use Scenario: Compact automotive RKE fobs using ASK modulation at 315/434 MHz with push-button latency <100 ms. IC Role / Device Role / Timing Role: Low-power transceiver managing TX burst, crystal drift compensation, and fast RX-ready state - interfaces directly to low-pin-count MCU. Use Value: Programmable ASK output power (−20 to +10 dBm) optimizes range vs. battery drain; fractional-N PLL enables rapid frequency settling (<5 ms); integrated PA eliminates external matching. |
Use Scenario: Industrial condition-monitoring nodes measuring temperature/vibration and reporting wirelessly at 915 MHz in North America. IC Role / Device Role / Timing Role: Multi-band FSK transceiver supporting 112 kchip/s data rate and adaptive channel filtering - handles variable payload sizes and duty cycling. Use Value: Wide supply range (2.1–3.6 V) accommodates aging batteries; GFSK option improves spectral efficiency; digital RSSI and signal classification aid link-quality-aware routing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar sub-GHz RF transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si4463-B1B-FMR | Higher TX power (+20 dBm), integrated DC-DC converter, no on-chip Manchester decoder | Better suited for long-range outdoor sensor networks; requires external logic for Manchester encoding/decoding | Choose Si4463-B1B-FMR when >1 km range or energy harvesting supply is required; OL2381AHN/C0B,515 preferred for cost-sensitive, battery-only metering with embedded protocol stack |
| CC1125RHBR | Wider frequency range (27–1050 MHz), lower RX current (12.5 mA), no SSRU or PPR engine | More flexible for custom protocols but lacks hardware-accelerated signal classification for standards-based wakeup | Choose CC1125RHBR for proprietary high-speed links; OL2381AHN/C0B,515 delivers faster time-to-market for EN300-220/EN13757 deployments due to integrated signal recognition and auto-calibration |
Compared with Si4463-B1B-FMR and CC1125RHBR, OL2381AHN/C0B,515 provides tighter integration of protocol-aware features (Manchester decode, SSRU, PPR) and superior power efficiency in ultra-low-duty-cycle applications - reducing firmware complexity and extending battery life where regulatory compliance and rapid wakeup are critical.
Availability
OL2381AHN/C0B,515 is available at Aetrix Electronics and suitable for smart metering, home/building automation, and remote keyless entry applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial OEM programs.
Supply support for OL2381AHN/C0B,515 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
NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in RF, security, and mixed-signal integration.
The OL2381AHN/C0B,515 belongs to NXP's legacy sub-GHz transceiver product line designed specifically for ultra-low-power, standards-compliant telemetry in utility metering and building automation - emphasizing integration, regulatory readiness, and battery longevity.
FAQ
What is the operating voltage range for OL2381AHN/C0B,515?
The OL2381AHN/C0B,515 operates from 2.1 V to 3.6 V, enabling direct single lithium cell or alkaline battery operation. Its internal regulators (VREG_DIG, VREG_VCO, etc.) maintain stable domain voltages across this range, and the 0.5 µA standby current is specified at 2.1 V - making OL2381AHN/C0B,515 suitable for decade-long deployments in battery-powered smart meters and sensors.
Does OL2381AHN/C0B,515 support both ASK and FSK modulation natively?
Yes, OL2381AHN/C0B,515 supports ASK, FSK, and GFSK modulation modes through dedicated hardware blocks. ASK is implemented via programmable PA output power control synchronized to TX data; FSK uses fractional-N PLL loop modulation for precise LO frequency shifting; GFSK is applied via on-chip Gaussian filtering - all configurable via SPI registers without external components.
How does the Signal Signature Recognition Unit (SSRU) in OL2381AHN/C0B,515 improve reliability?
The SSRU in OL2381AHN/C0B,515 combines RSSI level classification, modulation depth analysis, and baud-rate estimation to validate incoming signals before waking the host MCU. This multi-criteria check - combined with configurable Preamble Pattern Recognition - significantly reduces false wakeups from noise or co-channel interference, which is essential for low-power applications like wireless M-Bus meters where every wakeup consumes precious battery energy.
What package type and pin count does OL2381AHN/C0B,515 use?
OL2381AHN/C0B,515 uses a 32-pin HVQFN (plastic thermal enhanced very thin quad flat package) with 5 mm × 5 mm body and 0.85 mm height (SOT617-3). It features an exposed die pad for thermal dissipation and grounding, and includes dedicated GND pins (1, 8, 9, 16, 32) to separate analog, digital, and RF return paths - critical for maintaining RF performance in compact layouts.
Can OL2381AHN/C0B,515 be used with a microcontroller that only supports standard 4-wire SPI?
Yes, OL2381AHN/C0B,515 supports both 3-wire (SDIO/SCLK/SEN) and 4-wire (SDIO/SCLK/SEN/SDO) SPI configurations. When using 4-wire mode, SDIO serves as MOSI and P13/SDO as MISO - eliminating bidirectional contention and simplifying timing for MCUs with fixed SPI peripheral implementations. Configuration is controlled via the SEP_SDO register bit.
OL2381AHN/C0B,515 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- 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:
- ASK, FSK, GFSK
- Frequency:
- 315MHz, 434MHz, 868MHz, 915MHz
- Data Rate (Max):
- 20kbps
- Power - Output:
- 11dBm
- Sensitivity:
- -118dBm
- Memory Size:
- -
- Serial Interfaces:
- SPI
- GPIO:
- -
- Voltage - Supply:
- 2.1V ~ 3.6V
- Current - Receiving:
- 16.5mA
- Current - Transmitting:
- 14mA ~ 22mA
- Operating Temperature:
- -25°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 32-HVQFN (5x5)
OL2381AHN/C0B,515 FAQ
1.How can I place an order for OL2381AHN/C0B,515 through Aetrix?
Please submit a Request for Quotation (RFQ) for OL2381AHN/C0B,515 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 OL2381AHN/C0B,515 reliable?
The price and inventory of OL2381AHN/C0B,515 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OL2381AHN/C0B,515 is usually 5 days.
3.What payment methods are accepted for OL2381AHN/C0B,515?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OL2381AHN/C0B,515 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OL2381AHN/C0B,515?
OL2381AHN/C0B,515 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OL2381AHN/C0B,515 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 OL2381AHN/C0B,515?
For technical support, including OL2381AHN/C0B,515 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OL2381AHN/C0B,515 requirements.
6.How does Aetrix verify that OL2381AHN/C0B,515 is sourced from the original manufacturer or authorized distributors?
All OL2381AHN/C0B,515 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 OL2381AHN/C0B,515 meets industry standards.
7.What is the process for return or replacement of OL2381AHN/C0B,515?
All OL2381AHN/C0B,515 units undergo pre-shipment inspection (PSI). If there is an issue with OL2381AHN/C0B,515, 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 OL2381AHN/C0B,515 part is unused and in its original packaging.
Return procedure for OL2381AHN/C0B,515:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OL2381AHN/C0B,515 Tags
-
ESP32-D0WD-V3
Espressif Systems
-
ESP8266EX
Espressif Systems
-
ESP32-S3
Espressif Systems
-
NRF24L01P-R7
Nordic Semiconductor ASA
-
NRF24L01P-R
Nordic Semiconductor ASA
-
ESP32-U4WDH
Espressif Systems
-
DA14531-00000OG2
Renesas
-
ESP32-C6FH4
Espressif Systems
-
DA14531-00000FX2
Renesas
-
NRF24L01P-T
Nordic Semiconductor ASA
-
NRF52810-QCAA-R
Nordic Semiconductor ASA
-
ESP32-S3FN8
Espressif Systems
Tech Hub
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…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
