MC14094BDR

Updated: 2026-09-20

Overview

The MC14094BDR is an 8-bit serial-in/parallel-out shift register from ON Semiconductor's 4000B series CMOS logic family. Designed for digital applications, it enables efficient serial-to-parallel data conversion with minimal power consumption. The device comes in an SOIC-16 package, offering compact integration for space-constrained designs. As a member of the 4000B series, it maintains compatibility with both TTL and CMOS logic levels while providing improved performance over earlier generations. Its primary role is to expand I/O capabilities in microcontroller systems or serve as a basic building block in digital circuits requiring serial data handling.

Structure and Working Principle

The MC14094BDR consists of eight cascaded D-type flip-flops with synchronous serial data input (DS) and asynchronous parallel outputs (Q0-Q7). Data shifts through the register on each rising edge of the clock (CP) input, while a separate strobe (STR) input controls parallel output latching. The synchronous reset (MR) allows clearing all flip-flops simultaneously. The device operates on a wide 3V to 18V supply range, with typical propagation delays of 200ns at 10V. Internal buffering provides high noise immunity (0.45 VDD noise margin), making it robust for industrial environments.

Key Features

The MC14094BDR offers several distinct advantages for digital design. Its CMOS technology ensures low power consumption (typical 1μA quiescent current) while maintaining high speed operation (3MHz typical at 10V). The wide operating voltage range supports interfacing with various logic families. Notably, the device includes output enable functionality through the STR pin, allowing three-state output control. This feature facilitates bus-oriented applications. The 4000B series' standardized pinout ensures drop-in replacement compatibility across manufacturers, reducing design risk during component shortages.

Application Areas

This shift register finds extensive use in digital display systems, particularly LED matrix and seven-segment driver circuits where serial data reduction is needed. Industrial applications include PLC input expansion, sensor data aggregation, and simple digital signal processing tasks. Consumer electronics implementations range from appliance control panels to peripheral interfaces in low-cost embedded systems. The MC14094BDR also serves educational purposes, demonstrating fundamental digital logic concepts in engineering curricula. Its robustness makes it suitable for automotive electronics where voltage fluctuations are common.

Maintenance and Precautions

Proper handling of the MC14094BDR requires standard CMOS precautions. Always use anti-static measures during installation, as the high-impedance inputs are sensitive to electrostatic discharge (ESD). Power supply sequencing should ensure VDD reaches stable voltage before input signals become active. For reliable operation, maintain unused inputs at defined logic levels (either tied high or low). Decoupling capacitors (0.1μF ceramic) should be placed close to the VDD pin. When driving heavy loads, consider adding buffer ICs to prevent excessive current draw from the shift register outputs.

B2B Procurement Guide

When sourcing MC14094BDR ICs, verify manufacturer authenticity through authorized distributors like Arrow, Avnet, or Digi-Key. The 'DR' suffix indicates the SOIC-16 package - confirm this matches your PCB footprint. Minimum order quantities typically start at 100 pieces for competitive pricing. Consider alternative part numbers (CD4094BE, HEF4094BP) for supply chain flexibility, but validate electrical characteristics. Lead times for ON Semiconductor parts average 8-12 weeks; plan inventory accordingly. For prototyping, sample quantities are often available through manufacturer programs or educational resellers.