onsemi MC14013BDG

MC14013BDG Dual D-Type Flip-Flop from onsemi Summary

The MC14013BDG is a CMOS dual D-type flip-flop manufactured by onsemi. It is designed to serve a broad range of digital logic applications, including shift registers, frequency dividers, and toggle or counter circuits. Housed in a space-efficient 14-lead SOIC, TSSOP, or SOEIAJ package, each MC14013BDG integrates two fully-independent edge-triggered D-type flip-flops. This configuration enables compact designs, minimizing component count while maximizing design flexibility in both industrial and commercial electronic systems.

Highlights of MC14013BDG

The MC14013BDG distinguishes itself through a set of key features tailored to enhance reliability, versatility, and ease of integration:

Static Operation: Suitable for low-power and standby mode applications.

Logic Edge-Clocked Flip-Flop: Information is reliably transferred only on the positive edge of the clock pulse, ensuring precise timing control.

Broad Supply Voltage Range: Operates from 3.0 V to 18 V, allowing flexibility across various system voltage rails.

Input Protection: All inputs are diode-protected, improving robustness against voltage transients and static discharge.

Output Drive Capability: Each output is capable of directly driving two low-power TTL loads or a single low-power Schottky TTL load across the full temperature range.

Automotive-Grade Option: NLV-prefix devices offer AEC–Q100 qualification and are PPAP-capable, targeting high-reliability and automotive applications.

Environmentally Friendly: All MC14013BDG devices are Pb-free, halogen-free, and RoHS compliant.

Design Structure and Operation Details of MC14013BDG

Each MC14013BDG flip-flop comprises dedicated Data (D), Set (S), Reset (R), and Clock (C) inputs, along with complementary Q and $\overline{Q}$ outputs. These elements are constructed using monolithic MOS P-channel and N-channel enhancement mode transistors. Operational logic is as follows:

The flip-flop stores and outputs the value present at the D input on the positive transition of the clock signal.

Asynchronous set and reset inputs allow the outputs to be immediately set or cleared regardless of clock state.

The internal design allows information to be latched indefinitely with the clock at either logic high or low, contributing to data retention and power savings between transitions.

A key aspect of the MC14013BDG’s design is its flexibility—the device can be configured as a D-type element, or converted into a T-type flip-flop for counter and toggle operations. This versatility is integral for system designers aiming to reduce inventory by standardizing on a single device for multiple logic functions.

MC14013BDG Electrical Properties and Timing Performance

Parameter selection is crucial when deploying the MC14013BDG in designs with stringent power or timing requirements:

Absolute Maximum Ratings protect device integrity; violating these can impact lifetime or cause failure. Supply and input voltages must be maintained within specified limits.

Input and Output Voltage Ranges: For reliable operation, all signals applied to the MC14013BDG should remain within $V_{SS} \leq (V_{in}, V_{out}) \leq V_{DD}$.

Power Dissipation: Designers must consider thermal derating, particularly in compact layouts or elevated temperature environments (e.g., -7.0 mW/°C reduction from 65°C to 125°C).

Propagation Delay and Minimum Pulse Widths: The typical output transition times and setup requirements scale with supply voltage, affecting maximum clock rates in high-speed applications.

Input/Output Load Considerations: The device's output drive is specified for two low-power TTL loads (or one Schottky TTL), which affects fan-out calculations in complex digital systems.

Unused Inputs: To avoid unpredictable behavior, all unused inputs must be tied to a defined logic level—either $V_{SS}$ or $V_{DD}$.

Mechanical Specifications and Package Details for MC14013BDG

Space and assembly constraints are addressed by offering the MC14013BDG in multiple package types:

SOIC-14 (Case 751A): Standard outline for through-hole and surface mount, providing mechanical robustness and widely-supported assembly processes.

TSSOP-14 (Case 948G): Thin, compact package suited for high-density PCBs.

SOEIAJ-14 (Case 965): Alternative footprint for specific industry applications.

All packages follow industry-standard dimensioning practices (ASME Y14.5M or ANSI Y14.5M, depending on package), include clear pin assignments, and have well-documented PCB soldering footprints to streamline automated assembly and reflow soldering.

Package selection can impact both board layout and thermal performance. For high-density or automotive applications, engineers should reference the detailed package dimensions and ensure compliance with respective soldering and mounting guidance from onsemi.

Common Uses and Technical Insights for MC14013BDG

The MC14013BDG finds wide use in digital design scenarios such as:

n-Stage Shift Registers: Cascading multiple MC14013BDG devices enables serial-to-parallel and parallel-to-serial data transfer in digital communication circuits.

Binary Ripple Up-Counters: Each flip-flop can toggle on clock edges, allowing the construction of efficient divide-by-$2^n$ counters for timing, sequencing, or event counting.

Modified Ring Counters: The combination of the device’s set/reset and clocking logic supports custom counter architectures (e.g., divide-by-(n+1)), useful in state machine design and cyclical sequencing.

In these applications, the edge-trigger nature, high input impedance, and robust input protection of the MC14013BDG simplify system integration. However, attention must be paid to input signal integrity (particularly for asynchronous set/reset signals), noise margin management, and unused input handling for maximum reliability.

Alternative or Substitute Devices for MC14013BDG

A critical aspect for both engineers and procurement professionals is the availability of equivalent or replacement options. The MC14013BDG is designed as a direct, pin-for-pin compatible replacement for the widely used CD4013B. Engineers can therefore substitute MC14013BDG into legacy designs without PCB or logic modifications. The NLV-prefixed versions further expand the device’s applicability where automotive qualification is mandated.

Before considering alternatives, it is important to assess specific application requirements, such as supply voltage compatibility, input/output logic levels, temperature range, and packaging constraints, to guarantee form, fit, and functional equivalence.

Conclusion

The MC14013BDG dual D-type flip-flop from onsemi is a robust and versatile digital logic building block that streamlines the design of counters, shift registers, and data storage circuits across a variety of electronic systems. Its broad feature set, proven electrical performance, and multiple package options make it a compelling choice for both new designs and as a drop-in replacement for legacy CD4013B footprints. By understanding the technical parameters, logic behavior, and real-world application considerations outlined here, product selection engineers and buyers can confidently integrate the MC14013BDG into their next project, ensuring both performance and supply continuity.