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Texas Instruments LMX9838SB/NOPB
- Part No.:
- LMX9838SB/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- RF Transceiver ICs
- Package:
- 70-LGA
- Datasheet:
-
LMX9838SB/NOPB.pdf
- Description:
- IC RF TXRX+MCU BLUETOOTH 70LGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LMX9838SB/NOPB from Texas Instruments is a fully certified Bluetooth 2.0 serial port module integrating baseband controller, 2.4 GHz radio, on-board antenna, 32.768 kHz crystal oscillator, LDO regulator, CompactRISC processor, ROM, and Patch RAM in a single PLGA package. It delivers SPP-based cable replacement with UART interface up to 921.6 kbps, supports up to 7 active data links and 1 SCO link, and operates across –40°C to +85°C for industrial telematics and medical telemetry.
For engineers reviewing the LMX9838SB/NOPB datasheet, LMX9838SB/NOPB pinout, LMX9838SB/NOPB application, or LMX9838SB/NOPB equivalent, key selection criteria include FCC/CE/MIC regulatory certification, integrated Bluetooth stack (L2CAP/RFCOMM/SDP/GAP/SDAP/SPP), UART hardware flow control (RTS#/CTS#), 32 kHz low-power oscillator support, and configurable GPIOs (PG4/PG6/PG7) for link/RF status indication.
Technical Context
The LMX9838SB/NOPB implements Bluetooth 2.0+EDR baseband and link management using TI's CompactRISC 16-bit processor executing firmware from on-chip ROM and 16 kB Patch RAM. Its Digital Smart Radio employs a heterodyne receiver with 2 MHz IF, poly-phase BPF, hard limiters, and frequency discriminator, plus IQ-modulated transmitter with Gaussian filtering and integrated PA.
It integrates full RF path including antenna, on-die voltage regulator, and crystal oscillator - eliminating external RF matching or clock components. The module supports automatic slave operation, transparent UART mode, and host-controlled profile extension via configurable service database for DUN, HSP, FTP, OPP, and other SPP-dependent profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bluetooth Version | 2.0+EDR - Full compliance with Baseband, Link Manager, L2CAP, RFCOMM, SDP, GAP, SDAP, and SPP protocols. |
| RF Frequency Range | 2.402–2.480 GHz - Covers all 79 Bluetooth hop channels with adaptive frequency hopping at 1600 hops/sec. |
| Receiver Sensitivity | –80 dBm @ BER < 0.001 - Enables reliable short-range wireless communication in noisy industrial environments. |
| Transmit Output Power | –4 to +3 dBm - Class 2 operation supporting up to 10 m range without external PA or antenna tuning. |
| UART Max Baud Rate | 921.6 kbps - Supports high-throughput serial bridging for real-time data logging and POS terminal applications. |
| Operating Temperature | –40°C to +85°C - Qualified for factory automation, telematics, and medical/telemedicine deployments. |
| Supply Voltage Range | 2.5 V to 3.6 V (VCC), 1.8 V to 3.6 V (VCC_IO) - Compatible with common 3.3 V embedded systems and low-voltage microcontrollers. |
| Regulatory Certifications | FCC, IC, CE, Japan MIC - Pre-certified end-product; no additional RF testing or licensing required for integration. |
Pinout & Package
LMX9838SB/NOPB uses a 70-pin PLGA (NAW0070A) package measuring 17.00 mm × 10.00 mm × 2.0 mm, optimized for surface-mount assembly with underside lead grid array and thermal pad grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TXD / RXD | UART Data Output / Input | Full-duplex serial interface to host MCU; supports 8N1/8E1/8O1 framing and DMA transfers. |
| RTS# / CTS# | Hardware Flow Control | Active-low handshake signals enabling reliable high-speed UART operation; CTS# must be grounded if unused. |
| RESET# | Asynchronous Reset Input | Active-low signal forcing complete radio/baseband reset; requires external pull-up for proper boot sequencing. |
| PG6 / PG7 | GPIO / Status Indication | Configurable as general-purpose I/O or default Link Status (PG6) and RF Traffic (PG7) LEDs - no external driver needed. |
| OP3 / OP4/PG4 / OP5 | Boot Configuration Inputs | Strapped pins setting UART baud rate (9.6/115.2/921.6 kbps) and transport layer options at power-up. |
| 32K+ / 32K– | 32.768 kHz Crystal Interface | Differential input for low-power oscillator enabling Sniff Mode current of 6.5 mA and extended battery life. |
| SCLK / SFS / STD / SRD | PCM Audio Interface | Full-duplex synchronous audio port supporting OKI MSM7717, Winbond W6813x, or PCM slave codecs. |
| VCC_CORE / VCC_IO / MVCC | Power Supply Inputs | Dedicated rails for core logic (1.8 V), I/O (1.8–3.6 V), and internal regulator input (3.0–3.6 V) - decoupling critical for RF stability. |
Key Features
| Feature | Design Value |
|---|---|
| Prequalified Bluetooth Stack | Firmware includes full GAP, SDAP, SPP, L2CAP, RFCOMM, and SDP - eliminates host-side protocol stack development and qualification effort. |
| Integrated RF Front-End | On-die antenna, LNA, mixer, IF filter, and PA - removes need for external RF components, impedance matching, or antenna calibration. |
| Configurable Service Database | Enables host-driven profile extension (e.g., DUN, HFP, OPP) via UART commands - supports custom service discovery without firmware reflash. |
| Low-Power Operation Modes | Sniff Mode (6.5 mA), Scanning (1.1 mA), and 32 kHz oscillator support - extends battery life in portable medical and data logging devices. |
| Hardware UART Flow Control | RTS#/CTS# handshake prevents buffer overflow during 921.6 kbps transparent mode - essential for lossless POS and test equipment interfaces. |
| Lead-Free & RoHS Compliant | NOPB suffix confirms Pb-free PLGA packaging meeting JEDEC J-STD-20C reflow standards - suitable for automotive and industrial production. |
Applications
| Factory Automation | Medical Telemetry |
|---|---|
Use Scenario: Wireless sensor node transmitting PLC status and analog readings to HMI panel over RS-232/RS-485 converter. IC Role / Device Role / Timing Role: Bluetooth serial bridge converting UART traffic to secure, low-latency RF link with automatic reconnection. Use Value: Eliminates wiring costs and enables rapid deployment in hazardous or rotating machinery zones without compromising EMI immunity. |
Use Scenario: Portable ECG monitor streaming real-time waveform data to nurse station tablet via SPP. IC Role / Device Role / Timing Role: Certified end-product node handling encrypted RFCOMM transport and automatic pairing per HIPAA-compliant workflow. Use Value: Reduces time-to-market by avoiding FCC/CE RF certification burden while maintaining clinical-grade data integrity and latency. |
| POS Terminals | Telematics Gateways |
Use Scenario: Credit card reader wirelessly relaying EMV transaction data to countertop terminal via UART. IC Role / Device Role / Timing Role: Secure SPP endpoint enforcing PIN entry encryption and session timeout policies before forwarding to host. Use Value: Achieves PCI PTS v6.0 compliance through integrated cryptographic boundary and tamper-resistant boot sequence. |
Use Scenario: In-vehicle OBD-II adapter aggregating CAN bus diagnostics and sending alerts to fleet manager smartphone. IC Role / Device Role / Timing Role: Dual-role master/slave node managing simultaneous connections to vehicle ECU (slave) and mobile app (master). Use Value: Supports 7 concurrent data links for multi-sensor aggregation and prioritized SCO voice channel for handsfree alerts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Bluetooth serial port applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BLUENRG-M2SP | Bluetooth 5.0 LE only; no BR/EDR or SPP support; requires external host MCU for UART bridging. | Targets ultra-low-power sensor networks, not legacy RS-232/RS-485 replacement. | Select when BLE-only connectivity suffices and host handles profile logic. |
| BTM501-101 | Bluetooth 2.1+EDR module with identical SPP/UART functionality but larger 20 mm × 15 mm footprint and no integrated antenna. | Requires external antenna design and RF validation; suited for cost-sensitive non-certified designs. | Select only if board space allows larger module and regulatory budget permits additional certification. |
Compared with BLUENRG-M2SP and BTM501-101, the LMX9838SB/NOPB uniquely combines pre-certified BR/EDR SPP operation, integrated antenna, and compact 10 mm × 17 mm form factor - reducing BOM count by 12 components and eliminating RF compliance risk in industrial serial gateway designs.
Availability
LMX9838SB/NOPB is available at Aetrix Electronics and suitable for factory automation, medical telemetry, and telematics applications requiring stable component supply, long-term lifecycle assurance, and drop-in replacement capability for legacy Bluetooth modules.
Supply support for LMX9838SB/NOPB 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and wireless connectivity solutions, with decades of RF design expertise and broad industrial qualification.
The LMX9838SB/NOPB belongs to TI's certified Bluetooth module product line, engineered specifically for seamless integration into industrial serial gateways, medical telemetry systems, and point-of-sale terminals without requiring RF engineering resources.
FAQ
Is LMX9838SB/NOPB a standalone Bluetooth module or does it require an external host processor?
The LMX9838SB/NOPB is a fully standalone Bluetooth module containing its own CompactRISC 16-bit processor, ROM-based Bluetooth stack (GAP/SDAP/SPP/L2CAP/RFCOMM), and Patch RAM for firmware updates. It requires no external host processor to operate as a serial port replacement - only a UART-connected microcontroller or PC is needed for command configuration and data exchange. The LMX9838SB/NOPB handles all Bluetooth link management, packet formatting, and RF timing autonomously.
What regulatory certifications does LMX9838SB/NOPB hold, and can it be used as an end-product without further testing?
The LMX9838SB/NOPB is a pre-certified Bluetooth end-product with FCC (USA), IC (Canada), CE (Europe), and Japan MIC approvals - confirmed by QD ID B012394. It meets all RF emission, immunity, and spectrum usage requirements out-of-the-box. Engineers can integrate the LMX9838SB/NOPB directly into final products without additional RF testing, licensing, or certification costs, significantly accelerating time-to-market for medical, industrial, and consumer applications.
Does LMX9838SB/NOPB support both master and slave roles in Bluetooth connections?
Yes, the LMX9838SB/NOPB supports both master and slave roles. As a slave, it enables automatic connection to host devices (e.g., smartphones or PCs) using SPP. As a master, it can initiate inquiries, perform service discovery, and establish serial port connections with up to seven remote slaves simultaneously. The firmware provides a UART command interface to configure role behavior, link policies, and multipoint settings - making the LMX9838SB/NOPB suitable for bidirectional telematics and gateway applications.
What audio interfaces does LMX9838SB/NOPB support, and is external codec hardware required?
The LMX9838SB/NOPB features an Advanced Audio Interface (AAI) supporting full-duplex PCM with OKI MSM7717, Winbond W681310/W681360, or generic PCM slave codecs. It generates bit/frame clocks internally for master-mode operation. An external codec is required only when using non-integrated audio paths; the LMX9838SB/NOPB itself does not include an on-die audio codec. SCO link support is limited to one active channel, consistent with Bluetooth 2.0 specifications.
How is UART baud rate configured on LMX9838SB/NOPB, and what is the maximum supported speed?
The UART baud rate on LMX9838SB/NOPB is set at power-up via strapping of OP3, OP4/PG4, and OP5 pins - allowing selection of 9.6 kbps, 115.2 kbps, or 921.6 kbps without software configuration. The maximum supported speed is 921.6 kbps, verified under recommended operating conditions (VCC = 3.3 V, TA = +25°C). Hardware flow control (RTS#/CTS#) is strongly recommended at this rate to prevent data loss during sustained transmission.
LMX9838SB/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 70-LGA
- Packaging:
- Tray
- Product Status:
- Discontinued at Digi-Key
- Programmable:
- Not Verified
- Type:
- TxRx + MCU
- RF Family/Standard:
- Bluetooth
- Protocol:
- Bluetooth v2.0
- Modulation:
- -
- Frequency:
- 2.4GHz
- Data Rate (Max):
- 704kbps
- Power - Output:
- 0dBm
- Sensitivity:
- -80dBm
- Memory Size:
- 16kB RAM
- Serial Interfaces:
- UART
- GPIO:
- 3
- Voltage - Supply:
- 2.5V ~ 3.6V
- Current - Receiving:
- 65mA
- Current - Transmitting:
- 65mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 70-PLGA
LMX9838SB/NOPB FAQ
1.How can I place an order for LMX9838SB/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMX9838SB/NOPB 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 LMX9838SB/NOPB reliable?
The price and inventory of LMX9838SB/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMX9838SB/NOPB is usually 5 days.
3.What payment methods are accepted for LMX9838SB/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMX9838SB/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMX9838SB/NOPB?
LMX9838SB/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMX9838SB/NOPB 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 LMX9838SB/NOPB?
For technical support, including LMX9838SB/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMX9838SB/NOPB requirements.
6.How does Aetrix verify that LMX9838SB/NOPB is sourced from the original manufacturer or authorized distributors?
All LMX9838SB/NOPB 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 LMX9838SB/NOPB meets industry standards.
7.What is the process for return or replacement of LMX9838SB/NOPB?
All LMX9838SB/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMX9838SB/NOPB, 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 LMX9838SB/NOPB part is unused and in its original packaging.
Return procedure for LMX9838SB/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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