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    1. Home/
    2. All Categories/
    3. Integrated Circuits - ICs/
    4. Interface ICs/
    5. LS1240A STMicroelectronics

    LS1240A [STMicroelectronics]

    LS1240A
    LS1240A

    Part No:

    LS1240A

    Category:

    Interface ICs

    Manufacturer:

    STMicroelectronics

    Description:

    LS1240 is a monolithic integrated circuit designed to replace the mechanical bell in telephone sets.

    Datasheet:

    Product FAQ

    1. Is LS1240A available for RFQ?

    Yes. LS1240A by STMicroelectronics is available for RFQ. Submit your required quantity and our team will confirm real-time stock, lead time, and volume pricing.

    2. Why is there no fixed price for LS1240A?

    Pricing for LS1240A can vary by order quantity, market availability, date code, packaging, and delivery destination. Request a quote to receive the latest volume pricing.

    3. What are the key specifications of LS1240A?

    LS1240A is a STMicroelectronics Interface ICs with Thermal Resistance Junction Ambient: 100°C/W and Calling Voltage Continuous: 120 Vms. Review the product details or submit an RFQ if you need confirmation before purchase.

    4. How fast can I get a quote for LS1240A?

    Our sales team usually responds within 24 hours after receiving your RFQ. The quote may include stock status, unit price, lead time, shipping options, and available alternatives.

    5. How soon can LS1240A be shipped?

    If stock is confirmed, in-stock parts can usually ship within 1–2 business days. Final lead time depends on quantity, stock source, and delivery destination.

    6. Can you suggest alternatives to LS1240A?

    Yes. If LS1240A is unavailable, obsolete, or does not meet your required lead time, we can help check similar STMicroelectronics Interface ICs parts or compatible alternatives.

    RFQ

    Part Number:

    LS1240A

    Manufacturer:

    STMicroelectronics

    Looking for Pricing? Contact us for volume pricing.

    IMPORTANT NOTICE

    Quotations are subject to stock availability and may vary with market conditions. Prices and lead times are not guaranteed until a purchase order is confirmed. Ensure your contact details are correct to avoid delays in response.

    Featured Product

    Stock Status:

    Available for RFQ

    Pricing:

    Request Volume Pricing

    Quote Response:

    Within 24 Hours

    Shipping:

    In-stock parts ship in 1–2 business days

    Specification

    Type
    Parameter
    Activation Voltage Max
    13.2V
    Activation Voltage Min
    12.2V
    Calling Voltage Continuous
    120 Vms
    Calling Voltage Pulse
    200 Vms
    Current Consumption
    1.5mA ~ 1.8mA
    Dc Supply Current Max
    30mA
    Operating Temperature
    -40°C ~ +70°C
    Package
    Minidip; SO8
    Package Type
    Minidip, SO8
    RoHS Status
    RoHS Compliant
    RoHS Status
    Storage Temperature
    -65°C ~ +150°C
    Supply Voltage
    26V
    Sustaining Voltage Max
    9V
    Sustaining Voltage Min
    8V
    Thermal Resistance
    100°C/W
    Thermal Resistance Junction Ambient
    100°C/W

    Products Detail

    LS1240 is a monolithic integrated circuit for telephone ringers, replacing mechanical bells. It can drive piezoceramic converters or dynamic loudspeakers directly, with adjustable tone and switching frequencies via external components. Features include low current consumption for parallel operation of 4 devices, integrated rectifier bridge with zener diodes for over-voltage protection, and integrated voltage and current hysteresis. The supply voltage is derived from the AC ring signal, making it immune to line noise. Output current capability is higher than standard ringers, and no transformer is needed for dynamic speaker drive.

    Key Features

    • Low current consumption for parallel operation of 4 devices
    • Integrated rectifier bridge with zener diodes for over-voltage protection
    • Adjustable tone and switching frequencies via external components
    • Integrated voltage and current hysteresis
    • Direct drive of piezoceramic converter or dynamic loudspeaker
    • Higher output current capability than standard ringer
    • No transformer needed for dynamic loudspeaker drive
    • Supply voltage from AC ring signal, immune to line noise

    Application scenarios

    • Telephone sets

    Documents

    Datasheets:

    LS1240
    Shipping & Warranty

    Fast Dispatch: Ships in 5-7 days(in-stock parts within 1-2 days)

    Unishop Global Export: 1-7 days, $40.00

    Guaranteed Delivery: Door-to-door in 30 days

    Compliant Worldwide Shipping: DHL, FedEx, SF, and UPS.

    Feature

    • 30-Day Guarantee
      30-Day Guarantee
    • Fasted Delivery
      Fasted Delivery
    • Hassle-Free Returns
      Hassle-Free Returns
    • Secure payment method
      Secure payment method

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