onsemi MC14584BFELG

Overview

MC14584BFELG from onsemi is a hex Schmitt trigger IC constructed with MOS P-channel and N-channel enhancement mode devices in a monolithic structure, delivering 6 independent Schmitt-trigger inverters with hysteresis. It operates across 3.0–18 VDC supply, provides ≥0.25 V hysteresis at 5 V, supports −55°C to +125°C ambient operation, and is packaged in SOEIAJ-14 (Case 965). It is used to square up slow-rising waveforms in industrial timing and noise-prone sensor interface circuits.

For engineers reviewing the MC14584BFELG datasheet, pinout, applications, or equivalent options, key selection considerations include its wide VDD range, input hysteresis voltage (VH), output drive capability (±0.36–8.8 mA), thermal robustness, and Pb-free SOEIAJ-14 packaging - all critical for legacy system replacement and high-noise industrial signal conditioning.

Technical Context

The MC14584BFELG implements six identical CMOS Schmitt-trigger inverter stages, each with asymmetric positive- and negative-going thresholds (VT+ and VT−) defining hysteresis. Its dual-diode protected inputs tolerate transient overvoltage up to VDD + 0.5 V, and it draws only 0.5 µA typical quiescent current per package at 25°C.

It delivers rail-to-rail output swing (VOH ≥ 4.95 V, VOL ≤ 0.05 V at VDD = 5 V), supports dynamic loading up to CL = 50 pF, and exhibits propagation delays of 40–250 ns depending on VDD and temperature - enabling reliable waveform shaping in low-frequency clock clean-up and analog-to-digital interface applications.

Key Specifications

Pinout & Package

MC14584BFELG is housed in a 14-lead SOEIAJ (Small Outline Extended I/O J-bend) package (Case 965), measuring 9.90–10.50 mm × 5.10–5.45 mm × 1.42 mm max height, with 1.27 mm pitch and Pb-free finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schmitt trigger inverter applications.

Compared with MC14584BFG, MC14584BFELG offers identical functionality but optimized for high-volume production via larger tape-and-reel packaging; versus CD40106BE, it provides broader temperature support, higher hysteresis, and automotive qualification - making it preferable for industrial and automotive replacement designs despite discontinuation status.

Availability

MC14584BFELG is available at Aetrix Electronics and suitable for industrial sensor interfaces, legacy system clock clean-up, and motor control feedback conditioning requiring stable component supply despite end-of-life status.

Supply support for MC14584BFELG 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 power, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The MC14584BFELG belongs to onsemi's legacy CMOS logic family, designed specifically for high-noise immunity and wide-voltage operation in industrial control, instrumentation, and automotive subsystems.

FAQ

Is MC14584BFELG still in active production?

No, MC14584BFELG is marked as discontinued per onsemi's October 2025 datasheet revision. However, Aetrix Electronics maintains verified legacy stock with full traceability and supports design-in continuity through controlled allocation and lifecycle coordination for existing production programs.

What is the pin compatibility between MC14584BFELG and CD40106BE?

MC14584BFELG and CD40106BE share identical pinout (SOEIAJ-14), function mapping, and logic behavior. However, MC14584BFELG offers wider VDD range (3–18 V vs. 3–15 V), higher hysteresis at low VDD, and AEC-Q100 qualification - making it a functional upgrade where environmental robustness is required.

Can MC14584BFELG replace MC14069UB in existing designs?

Yes, MC14584BFELG can directly replace MC14069UB as a drop-in upgrade for enhanced noise immunity. Both are hex inverters in SOEIAJ-14 packages, but MC14584BFELG adds Schmitt-trigger hysteresis - eliminating need for external RC networks to achieve waveform squaring in slow-edge applications.

What is the maximum capacitive load MC14584BFELG can drive reliably?

MC14584BFELG is characterized for CL = 50 pF in switching specifications, with propagation delay and rise/fall times guaranteed under that load. For heavier loads, total supply current increases linearly per IT(CL) = IT(50 pF) + (CL − 50) × VDD × f × 0.001 - requiring careful thermal and timing validation beyond 50 pF.

Does MC14584BFELG require external pull-up or pull-down resistors on unused inputs?

Yes, unused inputs on MC14584BFELG must be tied to either VSS or VDD - floating inputs risk increased power consumption, oscillation, or latch-up due to CMOS high-impedance nature. No external resistors are needed on outputs, which may be left open per datasheet guidance.