LE9541CUQC

Telecom Overview

The LE9541CUQC is a single-channel high-voltage ringing Subscriber Line Interface Circuit (SLIC) manufactured by Microchip Technology. It operates on a 3.3V supply and features a serial interface with reset for operational control and status reporting. The device supports up to -100V ringing battery voltage and provides DC loop closure, ring trip, and thermal shutdown detection. It includes longitudinal-to-metallic balance of 52 dB and PSRR of 40 dB in active modes. Gain flatness is maintained within ±0.05 dB across the voice band. The component is housed in a 6x6mm 40-pin QFN package.

Telecom Feature Summary

• Functionally equivalent to channel 1 of the LE9540, enabling dual one or two channel PCB designs through pin-to-pin compatibility.
• Optimized for integration with Broadcom BCM338x/BCM339x SoCs in short-loop residential gateways.
• Supports GR909 testing standards and wide-band applications up to 7-kHz bandwidth.
• Includes test load switch support for integrated test algorithms and thermal shutdown protection with hysteresis.

Telecom Applications

• Short-loop residential gateways
• Voice loops in short-loop Cable applications
• Broadcom BCM338x/BCM339x based systems

Telecom Procurement Notes

Verify the specific suffix 'CUQC' indicates the 40-pin QFN tray packaging variant. Confirm the -100V rating aligns with system requirements, as the 'D' suffix denotes -145V capability. Ensure the source document matches the current revision to avoid discrepancies in electrical specifications or pin assignments during procurement.

Telecom Selection Notes

Select this component when a single-channel SLIC compatible with the LE9540 footprint is required. It is suitable for designs utilizing Broadcom BCM338x or BCM339x processors. Choose the CUQC suffix for tray packaging needs. Verify that the -100V ringing battery limit meets the application's line voltage requirements compared to the higher voltage D-series options.

Telecom Part Context

The LE9541CUQC belongs to the VE950 Series of Ringing Subscriber Line Interface Circuits from Microsemi/Microchip Technology. It serves as the single-channel counterpart to the dual-channel LE9540. The device shares the same 6x6mm 40-pin QFN package form factor as the LE9540 to facilitate flexible board layout strategies for gateway manufacturers.

Telecom Replacement Considerations

LE9541DUQC: Offers -145V ringing battery support while maintaining the same 40-pin QFN package and functionality.

Telecom FAQ

Is the LE9541CUQC pin-compatible with the LE9540?

Yes, the LE9541 is pin-to-pin compatible with channel 1 of the LE9540, allowing for dual one or two channel PCB designs using the same 6x6mm 40-pin QFN package.

What is the maximum ringing battery voltage for the LE9541CUQC?

The LE9541CUQC supports up to -100V ringing battery voltage. The LE9541DUQC variant supports up to -145V.

Does the LE9541CUQC support wide-band audio applications?

Yes, the device features a high voltage high bandwidth design that supports 7-kHz wide-band applications.