onsemi MC74VHC1G50DFT1G-L22038

Overview

MC74VHC1G50DFT1G-L22038 from onsemi is a single CMOS buffer IC with CMOS-level input thresholds, operating from 2.0 V to 5.5 V supply, delivering 3.5 ns typical propagation delay at 5 V, ±8 mA output drive at 3.0 V, and over-voltage tolerant inputs/outputs up to 5.5 V - used for level-shifting between 3 V and 5 V logic domains in portable instrumentation interfaces.

For engineers reviewing the MC74VHC1G50DFT1G-L22038 datasheet, pinout, applications, or equivalent options, key selection criteria include input threshold compatibility (CMOS vs. TTL), IOFF partial power-down support, SC-88A package footprint, and 5.5 V overvoltage tolerance for mixed-supply system interfacing.

Technical Context

This device implements a non-inverting buffer with Schmitt-trigger-free CMOS input structure, enabling direct interface with both 3 V and 5 V signal sources without external level translators. Its IOFF circuitry ensures high-impedance outputs when VCC = 0 V, preventing back-driving in partial-power-down systems.

The SC-88A (Case 419A) package features five terminals with Pin 1 as NC, Pin 2 as input (A), Pin 3 as GND, Pin 4 as output (Y), and Pin 5 as VCC - matching the standard pinout for SC-88A/SOT-353-compatible footprints. Input leakage remains ≤±1.0 µA across −55 °C to +125 °C.

Key Specifications

Pinout & Package

MC74VHC1G50DFT1G-L22038 is packaged in SC-88A (Case 419A), a 5-pin surface-mount package measuring 2.0 mm × 1.25 mm × 0.95 mm with 0.65 mm pitch. Pin 1 is marked by a dot or beveled edge; orientation follows JEDEC-standard tape-and-reel delivery (Q2 orientation).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar buffer applications.

Compared with SN74LVC1G125DBVR and 74AUP1G17GW,125, MC74VHC1G50DFT1G-L22038 uniquely combines 5.5 V overvoltage tolerance, IOFF, and 2.0–5.5 V operation - making it the only choice for robust 3 V/5 V bridging in thermally demanding or partial-power-down environments.

Availability

MC74VHC1G50DFT1G-L22038 is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable medical device logic, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MC74VHC1G50DFT1G-L22038 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 management, analog, logic, and sensing solutions for automotive, industrial, and cloud infrastructure markets.

The MC74VHC1G50 series belongs to onsemi's high-speed CMOS logic family, designed specifically for low-power, mixed-voltage signal conditioning in space-constrained embedded systems requiring robustness and wide operating margins.

FAQ

What is the input voltage threshold behavior of MC74VHC1G50DFT1G-L22038?

The MC74VHC1G50DFT1G-L22038 uses CMOS-level input thresholds: VIH = 70% of VCC and VIL = 30% of VCC across its 2.0–5.5 V supply range. At VCC = 3.3 V, VIH is 2.31 V min and VIL is 0.99 V max. This ensures reliable switching with standard 3.3 V logic outputs and eliminates ambiguity seen with TTL thresholds. The MC74VHC1G50DFT1G-L22038 does not exhibit hysteresis or Schmitt-trigger behavior.

Can MC74VHC1G50DFT1G-L22038 safely interface a 5 V microcontroller GPIO to a 3 V FPGA input?

Yes - MC74VHC1G50DFT1G-L22038 inputs tolerate up to 5.5 V regardless of VCC, so a 5 V GPIO can drive Pin 2 directly while VCC = 3.3 V. Its output swings rail-to-rail (0 V to 3.3 V), matching FPGA input requirements. No external resistors or level shifters are needed. The MC74VHC1G50DFT1G-L22038 also provides IOFF protection if the FPGA is powered down while the microcontroller remains active.

What is the thermal performance of MC74VHC1G50DFT1G-L22038 in SC-88A package?

In SC-88A (Case 419A), MC74VHC1G50DFT1G-L22038 has θJA = 377 °C/W on a standard FR-4 board with minimum copper pad spacing. At 8 mA output sink/source and 5.5 V VCC, worst-case power dissipation is ~44 mW, resulting in ~16.6 °C junction rise above ambient. Derating begins above 85 °C ambient; full specification is guaranteed to +125 °C case temperature per datasheet limits.

Does MC74VHC1G50DFT1G-L22038 support hot insertion or live board replacement?

Yes - MC74VHC1G50DFT1G-L22038 supports hot insertion due to its overvoltage-tolerant I/O (up to 5.5 V) and IOFF functionality. When VCC is absent or ramping, outputs remain high-impedance and inputs do not draw destructive current even with 5 V applied. This prevents bus contention and latch-up during live board swaps in modular industrial systems. The MC74VHC1G50DFT1G-L22038 is rated for ±100 mA latch-up immunity per JESD78 Class II.

Is MC74VHC1G50DFT1G-L22038 pin-compatible with MC74VHC1GT50DFT1G?

No - MC74VHC1G50DFT1G-L22038 and MC74VHC1GT50DFT1G share identical SC-88A pinout and package, but differ in input threshold specifications: MC74VHC1G50DFT1G-L22038 uses CMOS thresholds (VIH ≈ 0.7×VCC), while MC74VHC1GT50DFT1G uses TTL thresholds (VIH = 2.0 V fixed). Substitution requires verification that driving source logic levels meet the target device's VIH/VIL spec - they are not drop-in replacements.