MC14503BD

Overview

The MC14503BD is a hex non-inverting buffer with three-state outputs, designed for common bussing applications. It operates within a supply voltage range of 3.0 Vdc to 18 Vdc and features high current source and sink capabilities. The device includes two disable controls: Disable A manages buffers 1 through 4, while Disable B controls buffers 5 and 6. When disabled, outputs enter a high impedance state. It is TTL compatible and available in SOIC-16 packages.

Feature Summary

• Hex non-inverting buffer configuration with three-state outputs
• Dual independent disable controls for versatile bus management
• High current drive capability suitable for direct TTL loading

Applications

• Common bussing applications requiring tri-state isolation
• TTL-compatible logic buffering systems
• Digital signal routing where output enable/disable control is required

Procurement Notes

Verify the specific package suffix matches the required form factor, as the MC14503B series includes PDIP, SOIC, and SOEIAJ options. Confirm RoHS compliance status if lead-free materials are mandated for the assembly process. Cross-reference the ordering information table to ensure the correct shipping quantity and tape/reel specifications align with manufacturing requirements.

Selection Notes

Select this component when a hex buffer with high-current drive and independent output disabling is necessary. The dual disable inputs allow for segmented bus control, making it suitable for complex digital architectures. Ensure the operating voltage remains within the 3V to 18V range and verify thermal dissipation limits for the chosen package type under maximum load conditions.

Part Context

This part belongs to the MC14503B family of CMOS logic devices manufactured by onsemi. It serves as a standard interface component for managing multiple digital signals simultaneously. The design supports pin-for-pin replacement with legacy parts like the MM80C97, facilitating upgrades in existing circuit designs without layout modifications.

Replacement Considerations

The datasheet explicitly lists the MM80C97 and 340097 as pin-for-pin replacements.