What is the Additional Feature ?

Name: LMX9838SB/NOPB
Brand: Texas Instruments
SKU: LMX9838SB/NOPB
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Any Feature, including a modified Existing Feature, that is not an Existing Feature.

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Texas Instruments LMX9838SB/NOPB

Part No.:: LMX9838SB/NOPB

Manufacturer:: Texas Instruments

Package:: 70-LGA

Datasheet:: LMX9838SB/NOPB.pdf

Description:: IC RF TXRX+MCU BLUETOOTH 70LGA

In Stock:: 3216

Quantity:: Add To Cart

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LMX9838SB/NOPB Specifications

Packaging:
Tray
Series:
-
ProductStatus:
Discontinued at Mosen
Type:
TxRx + MCU
RFFamily/Standard:
Bluetooth
Protocol:
Bluetooth v2.0
Modulation:
-
Frequency:
2.4GHz
DataRate(Max):
704kbps
Power-Output:
0dBm
Sensitivity:
-80dBm
MemorySize:
16kB RAM
SerialInterfaces:
UART
GPIO:
3
Voltage-Supply:
2.5V ~ 3.6V
Current-Receiving:
65mA
Current-Transmitting:
65mA
OperatingTemperature:
-40°C ~ 85°C
MountingType:
Surface Mount

LMX9838SB/NOPB this integrated circuit is available in factory sealed anti static packs. at icwhale.com. Please read product page below detail information. including LMX9838SB/NOPB price, data-sheet, in-stock availability, technical difficulties. Also. Quickly Enter the access of compare listing to find out replaceable electronic parts. If you want to retrieve comprehensive data for LMX9838SB/NOPB to optimize the supply chain (including cross references, life-cycle, parametric, counterfeit risk, obsolescence managements forecasts), please contact to our Tech-supports team.

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LMX9838SB/NOPB information

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LMX9838SB/NOPB Typical application Circuitry

LMX9838SB/NOPB is a versatile integrated circuit primarily designed for USB peripheral applications, featuring USB-to-serial UART conversion and I2C/SPI interfaces. It's commonly used in various USB-based devices, such as keyboards, mice, and gaming controllers.

Application Scenario:

In this scenario, we'll design a simple USB keyboard interface using the LMX9838SB/NOPB chip.

Circuit Design:

To design a USB keyboard interface using LMX9838SB/NOPB, follow these detailed steps:

1. USB Connection:

Connect the USB D+ and D- pins of LMX9838SB/NOPB to the corresponding D+ and D- lines of a USB connector. Provide proper decoupling capacitors near the power supply pins of the chip.

2. Keyboard Interface:

Connect the keyboard matrix to the GPIO pins of LMX9838SB/NOPB. Typically, keyboards use a matrix arrangement of switches. Map rows and columns of the keyboard matrix to specific GPIO pins of the chip, ensuring proper pull-up or pull-down resistors for stable operation.

3. Power Supply:

Ensure a stable power supply voltage, typically 3.3V or 5V, to the VCC pin of LMX9838SB/NOPB. Utilize voltage regulators and filtering capacitors to minimize voltage fluctuations and noise.

4. Communication:

Configure the I2C or SPI interface of LMX9838SB/NOPB to communicate with the host controller or microcontroller. Connect the corresponding interface lines (SDA/SCL for I2C or MOSI/MISO/SCK for SPI) to the host controller's communication pins.

5. Firmware Development:

Write firmware code to handle USB enumeration and keyboard scanning. Implement the USB HID protocol to transmit keyboard key presses and releases to the host device. Utilize the LMX9838SB/NOPB datasheet for register configurations and protocol details.

Considerations:

When designing the USB keyboard interface, it's crucial to consider the following aspects:

- USB Compliance: Ensure that the circuit complies with USB specifications to guarantee compatibility with host devices.

- Key Ghosting: Prevent key ghosting issues by carefully designing the keyboard matrix layout and scanning algorithm to detect multiple key presses accurately.

- Power Consumption: Optimize firmware and hardware design to minimize power consumption for efficient operation, especially in low-power USB applications.

- ESD Protection: Implement adequate ESD protection measures to safeguard LMX9838SB/NOPB and connected components from electrostatic discharge during operation and handling.

- Signal Integrity: Ensure proper signal integrity by routing communication lines away from noisy traces and utilizing appropriate impedance matching techniques.

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3. Are the LMX9838SB/NOPB price and inventory displayed accurate?

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6. What is the process for return or replacement of LMX9838SB/NOPB?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the LMX9838SB/NOPB we delivered, we will accept the replacement or return of the LMX9838SB/NOPB only when all of the below conditions are fulfilled:

(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of LMX9838SB/NOPB.

(3)The PartNo is unused and only in the original unpacked packaging.

Two processes to return the products:

(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations