4042BDM

Overview

The CD4042BDM is a CMOS Quad Clocked D Latch from the 4000/14000/40000 series. It features high-level triggered data latching with complementary outputs. The device operates on a single power supply ranging from 3V to 18V, with a nominal voltage of 5V. It utilizes a ceramic DIP-16 package with side brazed construction. Key electrical characteristics include a maximum output current of 0.00036A and a load capacitance of 50pF. The component supports an operating temperature range from -55°C to 125°C.

Feature Summary

• Quad configuration providing four independent clocked D latch circuits within a single package
• High-level triggered operation allowing data capture when the clock signal is active
• Complementary output structure providing both true and inverted logic states for each latch

Applications

• Digital data storage in microprocessor-based systems
• Parallel-to-serial conversion circuits
• Shift register implementations requiring stable data retention

Procurement Notes

Verify the manufacturer designation, as National Semiconductor assets were acquired by Texas Instruments. Confirm the specific suffix 'DM' corresponds to the ceramic DIP-16 package with side brazed construction. Ensure compatibility with MILITARY temperature ratings if required for the application environment.

Selection Notes

Select this component when a quad latch with complementary outputs is required in a harsh thermal environment. The ceramic package offers superior reliability compared to plastic variants. Verify that the system voltage falls within the 3V to 18V operational range and that the input trigger levels align with the high-level activation requirement.

Part Context

This part belongs to the standard 4000-series CMOS logic family, widely used in industrial and military applications due to its wide voltage tolerance and robust packaging. The 'CD' prefix typically denotes commercial or military grade availability depending on the specific manufacturer's coding conventions at the time of production.

Replacement Considerations

Equivalent parts include CD4042BC and CD4042BD from Texas Instruments. Cross-manufacturer alternatives such as HCF4042B (STMicroelectronics) or BU4042B (Rohm) may be considered, provided pinout and electrical specifications match.