CD4503BCN – NATIONAL SEMICONDUCTOR

Overview

The CD4503BCN, a dual 2-bit, 4-bit non-inverting buffer from NATIONAL SEMICONDUCTOR (now onsemi), is designed for high-impedance signal buffering and driving applications across a broad voltage range. Its key operational characteristic lies in its ability to provide significant current sourcing and sinking capabilities (17.6mA High, 25mA Low) while maintaining low static power dissipation. A critical design consideration for engineers is the trade-off between its wide operating voltage (3V to 15V) and the potential for increased propagation delay at lower supply voltages, necessitating careful timing analysis in high-speed digital systems.

Key Features

• Dual 2-bit, 4-bit non-inverting buffer logic
• Wide supply voltage range: 3V to 15V
• Output current: 17.6mA (High), 25mA (Low)
• Operating temperature: -55°C to 125°C
• Through-hole mounting, 16-DIP (0.300″) package
• Low static power consumption

Applications

The component is engineered for deployment in systems requiring high reliability and performance under specific operating conditions. It provides functional stability across the stated design envelope.

• High-impedance signal buffering in analog front-ends
• Driving multiple loads from a single logic output
• Level shifting between different voltage domains
• Interfacing with high-current digital peripherals