onsemi MC14077BD

Overview

MC14077BD from onsemi is a quad exclusive NOR (XNOR) gate CMOS logic IC in SOIC-14 package, operating across 3.0–18 VDC supply, with ±10 mA output drive capability, <0.05 V low-level output voltage at 15 VDD, and input thresholds scalable to supply voltage. It serves as a noise-immune combinational logic element in battery-powered instrumentation and industrial control interface circuits.

For engineers reviewing the MC14077BD datasheet, pinout, applications, or equivalent options, key selection criteria include its wide VDD range, buffered outputs capable of driving two low-power TTL loads, double diode input protection, Pb-free SOIC-14 packaging, and direct functional replacement for CD4077B in legacy CMOS designs.

Technical Context

The MC14077BD implements four independent 2-input exclusive NOR gates using complementary MOS (CMOS) P- and N-channel enhancement-mode transistors on a single monolithic die. Each gate features fully buffered outputs and double-diode input protection for robustness against ESD and transient overvoltage.

It operates over −55 °C to +125 °C ambient temperature and supports dynamic switching up to ~1 MHz at 15 VDD (based on tPLH/tPHL = 55 ns typical, CL = 50 pF). Input thresholds scale with VDD: VIH = 3.5 V min at 5 VDD, 7.0 V min at 10 VDD, and 11 V min at 15 VDD; VIL = 1.5 V max at 5 VDD, 3.0 V max at 10 VDD, and 4.0 V max at 15 VDD.

Key Specifications

Pinout & Package

MC14077BD uses a 14-pin SOIC (Small Outline Integrated Circuit) package per case 751A, with 1.27 mm pitch, body dimensions 8.55 × 3.80 × 1.75 mm, and Pb-free finish (D suffix). Pin 1 is bottom-left corner (notch side), pin 14 is top-right.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad XNOR gate applications.

Compared with CD4077BE and 74HC86-based solutions, MC14077BD delivers broader supply range, superior temperature rating, lower static power, and integrated input protection - making it the optimal choice for industrial, automotive, and long-life embedded systems requiring reliability over raw speed.

Availability

MC14077BD is available at Aetrix Electronics and suitable for industrial control logic, battery-powered sensor interfaces, legacy system replacement, and programmable logic glue applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MC14077BD includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.

The MC14077BD belongs to the legacy MC14000B CMOS logic family, designed for high-noise-immunity, low-power digital interfacing in harsh environments - particularly where wide supply range and extended temperature operation are essential.

FAQ

What logic function does the MC14077BD implement?

The MC14077BD implements four independent 2-input exclusive NOR (XNOR) gates. Its output is high only when both inputs are identical (both high or both low). This behavior is confirmed in the device marking ("MC14077B"), datasheet title ("Quad Exclusive NOR Gate"), and truth table in Section 1 of the official onsemi datasheet Rev. 7. The MC14077BD does not perform XOR, AND, or OR functions - those are implemented by related parts like MC14070B (XOR) or MC14081B (AND).

Can MC14077BD operate from a 12 V supply?

Yes, MC14077BD is fully specified to operate from 3.0 VDC to 18 VDC, including 12 VDC. At 12 VDD, its VOH is ≥11.95 V (min), VOL is ≤0.05 V (max), and output drive is ≥3.4 mA sink/source - all guaranteed across −55 °C to +125 °C. This makes MC14077BD suitable for direct use in 12 V industrial control rails without regulation or level translation.

Is MC14077BD pin-compatible with CD4077B?

Yes, MC14077BD is functionally and pinout-compatible with CD4077B in the same package type (e.g., SOIC-14). Both share identical pin assignments: VDD (pin 14), VSS (pin 7), and corresponding input/output mapping. The onsemi datasheet explicitly states "MC14077B − Replacement for CD4077B Type", confirming drop-in replacement capability for design reuse and obsolescence mitigation.

What is the maximum operating temperature for MC14077BD?

The MC14077BD is rated for an ambient temperature range of −55 °C to +125 °C, as specified in the Maximum Ratings table (TA parameter). This exceeds the −40 °C to +85 °C range of standard CD4000-series devices and supports deployment in under-hood automotive, industrial motor drives, and outdoor infrastructure where thermal stress is severe.

Does MC14077BD require external pull-up or pull-down resistors on unused inputs?

No - unused inputs on MC14077BD must be tied directly to VDD or VSS (not through resistors), as stated in the datasheet: "Unused inputs must always be tied to an appropriate logic voltage level (e.g., either VSS or VDD)." This prevents floating nodes that could cause excessive current draw, oscillation, or latch-up. External resistors introduce unnecessary leakage paths and are not recommended or required for MC14077BD.