Diodes Incorporated 74AHC1G126SE-7

Overview

74AHC1G126SE-7 from Diodes Incorporated is a single non-inverting buffer gate with 3-state output, designed for bus driving and signal isolation in low-voltage digital systems. It operates across 2.0V–5.5V supply, delivers ±8 mA drive at 5.0V, features Schmitt-trigger inputs for noise immunity, and uses SOT353 package with 5-pin configuration for space-constrained PCBs.

For engineers reviewing the 74AHC1G126SE-7 datasheet, 74AHC1G126SE-7 pinout, 74AHC1G126SE-7 application, or 74AHC1G126SE-7 equivalent, key selection criteria include 3-state enable timing (tdis ≤12.5 ns @ 5V/50pF), input transition rate tolerance (≤100 ns/V), high-impedance leakage (≤10 µA), and RoHS-compliant green molding compound.

Technical Context

This device implements a CMOS-based non-inverting buffer with active-low output enable control. Its Schmitt-trigger inputs accept slow-rising/falling signals (≥100 ns/V) without oscillation, while the 3-state output supports bidirectional bus architectures by enabling/disabling signal propagation via OE.

The logic function follows standard AHC family characteristics: VOH ≥3.94 V (IOH = –8 mA, VCC = 4.5 V), VOL ≤0.55 V (IOL = 8 mA, VCC = 4.5 V), and propagation delay tpd ≤7.0 ns (VCC = 5 V, CL = 15 pF). Thermal resistance θJA is 430 °C/W in SOT353, requiring careful power budgeting in sustained switching applications.

Key Specifications

Pinout & Package

SOT353 (5-pin small outline transistor) package with gull-wing leads, 0.65 mm pitch, and 2.0 × 2.2 mm footprint. Designed for reflow soldering on FR-4 boards with minimal thermal mass.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVC1G126GW and SN74AHC1G126DBVR, the 74AHC1G126SE-7 uniquely combines wide-voltage operation, integrated Schmitt inputs, and ultra-compact SOT353 packaging-making it optimal for space- and noise-sensitive mixed-supply embedded interfaces.

Availability

74AHC1G126SE-7 is available at Aetrix Electronics and suitable for USB peripheral interface, industrial sensor hub, embedded display backlight control, and automotive infotainment I²C bus extender applications requiring stable component supply across extended temperature ranges (–40°C to +125°C).

Supply support for 74AHC1G126SE-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, energy-efficient components for industrial, computing, and consumer markets.

The 74AHC1G126SE-7 belongs to Diodes' AHC logic family, engineered for low-power, high-speed buffering in mixed-voltage digital systems where noise immunity and compact packaging are essential.

FAQ

Can the 74AHC1G126SE-7 operate reliably at 2.0 V with full timing specifications?

Yes. The device meets all recommended operating conditions down to 2.0 V, including VOH ≥1.9 V (IOH = –50 µA), VOL ≤0.1 V (IOL = 50 µA), and tpd ≤10.0 ns (CL = 15 pF). Propagation delay increases modestly versus 5 V operation but remains within datasheet limits across –40°C to +125°C.

What is the maximum capacitive load the 74AHC1G126SE-7 can drive while maintaining specified timing?

The datasheet specifies timing parameters up to 50 pF load capacitance. At 5 V, tpd remains ≤9.5 ns and tdis ≤11.0 ns under CL = 50 pF. Driving >50 pF will increase delay nonlinearly and may cause marginal setup/hold timing in synchronous systems; external series termination is recommended beyond this limit.

Does the Schmitt-trigger input affect DC logic thresholds?

No. The Schmitt-trigger action adds hysteresis (typ. 0.3 V) to input switching points but preserves standard AHC-compatible DC thresholds: VIH = 3.85 V min and VIL = 1.65 V max at VCC = 5.5 V. This ensures compatibility with standard CMOS outputs while rejecting noise on slow edges.

Is the SOT353 package compatible with standard SMT reflow profiles?

Yes. The SOT353 package is qualified for lead-free reflow per J-STD-020, with peak temperature up to 260°C. Its 0.65 mm pitch and gull-wing leads support automated optical inspection and achieve >99.5% first-pass yield using standard stencil thickness (0.12 mm) and Type 3 solder paste.