Nexperia USA Inc. 74HCT3G34DC-Q100H

Overview

74HCT3G34DC-Q100 from Nexperia is an automotive-grade triple non-inverting buffer IC with TTL-compatible inputs, 8-pin VSSOP package, -40 °C to +125 °C operating range, 4.5 V–5.5 V supply voltage, and AEC-Q100 Grade 1 qualification - used for signal level translation and fan-out buffering in engine control units and body electronics.

For engineers reviewing the 74HCT3G34DC-Q100 datasheet, 74HCT3G34DC-Q100 pinout, 74HCT3G34DC-Q100 application, or 74HCT3G34DC-Q100 equivalent, this page delivers verified pin functions, real-world timing specs (tpd = 10–29 ns), input/output voltage thresholds (VIH = 2.0 V min, VOL = 0.33 V max @ 4 mA), and direct-fit alternatives for automotive signal conditioning designs.

Technical Context

This device implements three independent CMOS-based non-inverting buffers with TTL-level input thresholds, enabling direct interfacing with legacy 5 V logic families while maintaining low static current (ICC ≤ 20 μA) and high noise immunity. Each channel features integrated input clamp diodes for overvoltage tolerance with external current-limiting resistors.

It operates across a fixed 4.5–5.5 V supply range with guaranteed output drive strength (VOH ≥ 4.13 V @ -4 mA, VOL ≤ 0.33 V @ 4 mA) and supports fast signal propagation (typical tpd = 10 ns at VCC = 4.5 V, Tamb = 25 °C) and transition times (tt ≤ 19 ns), meeting stringent timing requirements in powertrain and ADAS subsystems.

Key Specifications

Pinout & Package

VSSOP8 package (SOT765-1): plastic very thin shrink small outline, 8 leads, 2.3 mm body width, 0.65 mm pitch, pin 1 indicator below marking code "U34".

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HCT3G34DP-Q100, the DC variant offers space savings (2.3 mm vs. 3 mm width) but slightly reduced thermal headroom; versus SN74LVC3G34QDCURQ1, it provides guaranteed TTL input compatibility at the cost of supply flexibility and lower quiescent current.

Availability

74HCT3G34DC-Q100 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS domain controllers, and infotainment systems requiring stable component supply across automotive production lifecycles.

Supply support for 74HCT3G34DC-Q100 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, discrete, and MOSFET solutions, with core R&D and manufacturing in Europe and Asia.

This device belongs to Nexperia's automotive-qualified 74HCT logic family, engineered specifically for robust signal buffering in harsh-temperature automotive environments where TTL interoperability and AEC-Q100 compliance are mandatory.

FAQ

Is 74HCT3G34DC-Q100 pin-compatible with 74HC3G34DC-Q100?

Yes - both share identical VSSOP8 pinout (SOT765-1), same pin numbering, and functionally equivalent buffer architecture. The key difference is input threshold: HCT version accepts TTL levels (VIH ≥ 2.0 V), HC version requires CMOS levels (VIH ≥ 3.15 V at VCC = 4.5 V). Swapping requires verifying upstream driver compatibility.

Can this device drive a 50 pF capacitive load at 10 MHz?

Yes - with typical propagation delay of 10 ns and transition time ≤19 ns at VCC = 4.5 V, it meets timing budgets for 10 MHz signals driving 50 pF loads. Output drive strength (±4 mA) ensures adequate slew rate; layout best practices (short traces, local decoupling) are required to maintain signal fidelity.

What is the maximum allowable input voltage when VCC = 5.0 V?

The absolute maximum input voltage is VCC + 0.5 V = 5.5 V, but only if input clamping current is limited to ±20 mA. For sustained operation above VCC, external series resistors must restrict current to ≤20 mA - e.g., a 1 kΩ resistor limits current to 0.5 mA for a 5.5 V input, ensuring safe clamp diode operation.

Does this IC support hot-swap or live-insertion?

No - it lacks powered-off protection or Ioff specification. Applying input signals while VCC is unpowered may forward-bias internal clamp diodes and cause unintended current paths. Power sequencing must ensure VCC is stable before applying input signals to avoid latch-up or parametric degradation.