Texas Instruments

CD4043BF3A

CD4043BF3A Description

The CD4043BF3A from Texas Instruments is a high-reliability CMOS Quad NOR R/S Latch with 3-State Outputs, part of the 4000B series. Designed for 3V to 18V operation, it features four independent R/S latches with NOR gate inputs, offering robust performance in digital logic applications. The device provides 3-state outputs, enabling bus-oriented systems to share data lines efficiently. With a propagation delay of 50ns and symmetrical 6.8mA output current (sink/source), it ensures fast and stable signal handling. Packaged in a through-hole tube, it is RoHS3 compliant and suitable for industrial, automotive, and consumer electronics.

CD4043BF3A Features

• Wide Voltage Range (3V–18V): Supports flexible power supply configurations.
• Quad NOR R/S Latches: Four independent latches with NOR inputs for versatile logic control.
• 3-State Outputs: Enables bus sharing and reduces pin congestion in multi-device systems.
• High Output Drive (6.8mA): Balanced sink/source capability for driving capacitive loads.
• Low Propagation Delay (50ns): Ensures rapid response in timing-critical applications.
• Robust Construction: 4000B series reliability with MSL: Not Applicable for harsh environments.
• Through-Hole Packaging: Simplifies prototyping and repair in legacy systems.

CD4043BF3A Applications

• Data Storage Systems: Ideal for temporary data retention in registers or memory buffers.
• Bus Interface Circuits: 3-state outputs facilitate shared bus architectures in microprocessors.
• Industrial Control Logic: Used in PLCs and automation systems for signal latching.
• Automotive Electronics: Reliable operation under wide voltage fluctuations.
• Consumer Electronics: Keypads, display drivers, and remote control systems.
• Test Equipment: Signal conditioning and timing control in diagnostic tools.

Conclusion of CD4043BF3A

The CD4043BF3A stands out for its versatility, wide voltage tolerance, and 3-state output capability, making it superior to basic latches in complex digital designs. Its balanced current drive and low propagation delay ensure efficiency in high-speed applications, while the through-hole package aids durability. A preferred choice for industrial, automotive, and embedded systems, it combines TI’s proven 4000B series quality with modern compliance (RoHS3). For engineers needing reliable latching with bus compatibility, this IC delivers exceptional performance.