onsemi MC14077BDR2

Overview

MC14077BDR2 from onsemi is a quad exclusive NOR (XNOR) gate CMOS logic IC in SOIC-14 package, operating from 3.0 V to 18 V supply, with propagation delay of 55–350 ns (VDD = 15 V, CL = 50 pF), output drive capability up to ±8.8 mA sink/source, and quiescent current as low as 0.5 µA at 25°C - used in low-power digital control, level translation, and noise-immune combinational logic circuits.

For engineers reviewing the MC14077BDR2 datasheet, pinout, applications, or equivalent options, key selection criteria include wide VDD range (3–18 V), rail-to-rail input compatibility, buffered outputs, double-diode input protection, and SOIC-14 tape-and-reel packaging for automated assembly.

Technical Context

The MC14077BDR2 implements four independent CMOS-exclusive-NOR gates using complementary P- and N-channel enhancement-mode MOSFETs on a monolithic die. Each gate features fully buffered outputs and double-diode input protection, enabling robust operation in electrically noisy environments.

It operates across −55°C to +125°C ambient temperature, supports TTL-load driving (two LPTTL or one LP Schottky TTL load), and maintains defined logic thresholds (VIL ≤ 4.0 V, VIH ≥ 3.5 V at VDD = 15 V), ensuring interoperability with mixed-voltage logic systems.

Key Specifications

Pinout & Package

MC14077BDR2 is housed in 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. Pin 1 is marked by a beveled corner or notch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CD4077BM96 and 74HC86DR, MC14077BDR2 uniquely supports 18 V operation, delivers higher output current, and provides true quad XNOR functionality in pin-compatible SOIC-14 packaging - making it the optimal choice for industrial, automotive, and multi-rail embedded systems requiring robust, voltage-flexible combinational logic.

Availability

MC14077BDR2 is available at Aetrix Electronics and suitable for motor control logic, industrial sensor interfaces, power sequencing monitors, and legacy system bus parity applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MC14077BDR2 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 manufacturer specializing in energy-efficient, high-reliability silicon solutions for automotive, industrial, cloud, and IoT applications.

The MC14077BDR2 belongs to the MC14000B series of CMOS SSI logic devices, designed specifically for low-power, high-noise-immunity digital control in harsh environments where wide supply voltage tolerance and extended temperature operation are critical.

FAQ

What logic function does the MC14077BDR2 implement?

The MC14077BDR2 implements four independent exclusive-NOR (XNOR) logic gates. Each gate outputs HIGH when both inputs match (both LOW or both HIGH) and LOW when inputs differ. This behavior is confirmed in the device marking ("MC14077B"), datasheet title ("Quad Exclusive NOR Gate"), and truth table in Figure 1 of the official onsemi datasheet.

Can MC14077BDR2 operate from a 3.3 V supply?

Yes, MC14077BDR2 is fully specified to operate from 3.0 V to 18.0 V DC. At VDD = 3.3 V, its VOH is guaranteed ≥ 3.25 V and VOL ≤ 0.05 V, with propagation delay increasing to ~175 ns (max) and output drive reduced to ±0.36 mA - sufficient for driving modern 3.3 V CMOS loads and compatible with mixed-voltage interface designs.

Is MC14077BDR2 pin-compatible with CD4077B?

Yes, MC14077BDR2 is a functional and pin-compatible replacement for CD4077B, as explicitly stated in the "Features" section of the onsemi datasheet: "MC14077B − Replacement for CD4077B Type." Both devices share identical SOIC-14 pinout, logic function, and terminal assignments (VDD = Pin 14, VSS = Pin 7, etc.), enabling drop-in substitution in existing designs.

Does MC14077BDR2 require external pull-up or pull-down resistors on unused inputs?

Yes - unused inputs on MC14077BDR2 must be tied to a valid logic level (VDD or VSS) to prevent floating nodes that cause increased power consumption, oscillation, or ESD susceptibility. The datasheet states: "Unused inputs must always be tied to an appropriate logic voltage level (e.g., either VSS or VDD)." Pull-up/pull-down resistors (typically 10–100 kΩ) are acceptable, but direct connection is preferred for lowest leakage.

What is the maximum capacitive load MC14077BDR2 can drive reliably?

MC14077BDR2 is characterized for CL = 50 pF in timing specifications, but its output structure supports higher loads. Rise/fall time formulas (e.g., tTLH = (0.40 ns/pF) × CL + 20 ns at VDD = 15 V) indicate stable operation up to ~100 pF with predictable delays. For loads exceeding 100 pF, add series termination or buffer stages to maintain signal integrity and avoid excessive current spikes.