LE75183CDSC

Telecom Overview

The LE75183CDSC is a monolithic solid-state Line Card Access Switch (LCAS) from the VE750 series, designed as a replacement for electromechanical relays. It provides equivalent switching functionality of three 2-form-C switches to support power ringing access, line test access, and SLIC test access on analog line cards. The device operates exclusively on a 5 V supply with low power consumption. It features logic-level inputs for state control, built-in current limiting, thermal shutdown, and an SCR clamping circuit for fault protection. The CDSC suffix indicates a 20-pin plastic SOIC (Gull-wing) package.

Telecom Feature Summary

• Monolithic solid-state construction providing make-before-break or break-before-make switching capabilities
• Integrated protection mechanisms including current limiting, thermal shutdown, and diode bridge/SCR clamping
• Logic level input control compatible with TTL logic without requiring additional driver circuitry
• Designed for low impulse noise generation and clean, bounce-free switching operations

Telecom Applications

• Central office analog line card applications
• Digital Loop Carrier (DLC) systems
• Private Branch Exchange (PBX) equipment
• Digitally Added Main Line (DAML) implementations
• Hybrid Fiber Coax / Fiber-In-The-Loop (HFC/FITL) networks

Telecom Procurement Notes

Verify that the ordering part number matches the specific package variant required for the design. Confirm that the component meets RoHS Directive 2002/95/EC requirements if environmental compliance is mandatory. Ensure the selected package type aligns with the board assembly process and soldering temperature profiles specified in the datasheet.

Telecom Selection Notes

Select the Le75183C variant specifically for Digital Loop Carrier applications requiring simultaneous test-out and ring-test states. Verify that the external secondary protector limits voltage to prevent exceeding switch breakdown ratings. Ensure the design accommodates the 5 V supply requirement and utilizes the battery voltage reference correctly for protection circuitry operation.

Telecom Part Context

The LE75183CDSC belongs to the Zarlink VoiceEdge VE750 series of Line Card Access Switches. This family includes the Le75181 and Le75282 devices. The Le75183A/B/C variants are pin-for-pin compatible with Zarlink’s L7583A/B/C devices. The device serves as a solid-state alternative to traditional electromechanical relays in telecommunications infrastructure.

Telecom Replacement Considerations

The Le75183A/B/C devices are pin-for-pin compatible with Zarlink’s L7583A/B/C devices.