CD4043BCN

Latches Overview

The CD4043BCN is a quad cross-coupled 3-STATE CMOS NOR latch manufactured by onsemi (formerly Fairchild Semiconductor). It features four independent latches, each with separate Q outputs and individual SET and RESET inputs. A common ENABLE input controls the 3-STATE output condition for all latches. The device operates within a supply voltage range of 3V to 15V and supports an operating temperature range of -55°C to +125°C. It is housed in a 16-Lead Plastic Dual-In-Line Package (PDIP) conforming to JEDEC MS-001 standards.

Latches Feature Summary

• Quad configuration with independent SET and RESET inputs for each latch
• Common 3-STATE ENABLE input controlling output connection
• Wide supply voltage operation from 3V to 15V
• High noise immunity characteristics

Latches Applications

• Multiple bus storage systems
• Strobed register applications
• Independent storage with output enable functions
• General digital logic circuits

Latches Procurement Notes

Verify that the ordering code matches the specific package type required, as the CD4043BCN denotes the 16-Lead PDIP variant. Confirm the manufacturer origin, noting that while originally Fairchild, current production may be under onsemi branding. Ensure compatibility with the intended operating temperature range of -55°C to +125°C for your specific application environment before procurement.

Latches Selection Notes

Select the CD4043BCN when a quad NOR latch structure with 3-STATE outputs is required. Compare against the CD4044BC if NAND latch functionality is needed instead. Consider the PDIP package constraints regarding board space versus SOIC alternatives like the CD4043BCM. Verify power dissipation limits relative to the ambient temperature conditions of the final assembly.

Latches Part Context

This component belongs to the CD4000 series of CMOS logic devices, specifically designed for R/S latch applications. It serves as a fundamental building block for memory elements in digital systems. The BC suffix indicates commercial grade specifications. The device is part of a family that includes complementary NAND latch variants and other logic functions within the same manufacturing lineage.

Latches Replacement Considerations

The CD4044BCN is the direct functional equivalent offering NAND latch architecture instead of NOR. Other manufacturers produce compatible parts under similar naming conventions, such as MC14043B or HCC4043B. Verify pinout compatibility and electrical characteristics when substituting with generic equivalents.