Texas Instruments SN74AUP2G126DQER

Overview

SN74AUP2G126DQER from Texas Instruments is a dual 3-state bus buffer gate optimized for ultra-low-power operation across 0.8 V to 3.6 V supply range, featuring 9.9 ns max propagation delay at 3.3 V, 1.5 pF typical input capacitance, and I_off support for partial-power-down mode. It enables bidirectional signal isolation in space-constrained portable electronics such as wearables and IoT sensor nodes.

For engineers reviewing the SN74AUP2G126DQER datasheet, SN74AUP2G126DQER pinout, SN74AUP2G126DQER application, or SN74AUP2G126DQER equivalent, key selection criteria include its 0.4 mm max height X2SON-8 package, 3.6-V I/O tolerance for mixed-voltage interfacing, input-disable capability for floating inputs, and guaranteed 100 mA latch-up immunity per JESD 78 Class II.

Technical Context

This device implements two independent noninverting buffers, each with active-high output-enable (OE) control enabling high-impedance (Z) state on associated Y outputs. The AUP family uses advanced CMOS process technology to minimize both static current (I_CC ≤ 0.9 μA) and dynamic power consumption (C_pd = 4 pF typ at 3.3 V).

Input hysteresis improves noise immunity during slow transitions, while I_off circuitry prevents backflow current when V_CC = 0 V-critical for hot-plug and multi-rail system designs. The 3.6-V I/O tolerance allows safe interfacing with higher-voltage logic without level shifters.

Key Specifications

Pinout & Package

X2SON-8 (DQE) package: 1.45 mm × 1.05 mm footprint, 0.4 mm max height, exposed thermal pad (pin 5), no leads, JEDEC MO-287 compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 3-state buffer applications.

Compared with SN74LVC2G126DCTR and SN74AUC2G126DQER, SN74AUP2G126DQER uniquely balances ultra-low static power, 3.6-V I/O tolerance, and I_off support - making it the only choice for battery-operated mixed-voltage systems requiring zero-power-state safety.

Availability

SN74AUP2G126DQER is available at Aetrix Electronics and suitable for wearable electronics, medical patch monitors, and industrial edge node designs requiring stable component supply with long-term lifecycle assurance.

Supply support for SN74AUP2G126DQER 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in low-power logic innovation.

The AUP family was designed specifically for battery-powered portable applications demanding minimal static and dynamic power across wide V_CC ranges - targeting extended runtime in wearables, IoT endpoints, and energy-harvesting systems.

FAQ

What is the maximum operating frequency supported by SN74AUP2G126DQER?

SN74AUP2G126DQER does not specify a maximum clock frequency directly, but its 9.9 ns max propagation delay at 3.3 V implies reliable operation up to approximately 50 MHz in point-to-point configurations with 5 pF load. Actual usable frequency depends on system-level timing margins, PCB trace length, and capacitive loading - verified in SN74AUP2G126DQER switching characteristics tables across V_CC and C_L conditions.

Can SN74AUP2G126DQER operate with a 0.8-V supply voltage?

Yes, SN74AUP2G126DQER is fully specified from 0.8 V to 3.6 V. At 0.8 V, it delivers functional logic operation with t_pd ≤ 19.2 ns (CL = 5 pF), I_CC ≤ 0.9 μA, and VIH/VIL thresholds scaled proportionally - enabling direct integration with sub-1-V energy-harvesting PMIC outputs and ultra-low-power MCUs.

Does SN74AUP2G126DQER require external pull-up or pull-down resistors on its OE pins?

No - SN74AUP2G126DQER OE inputs have defined logic thresholds across the full V_CC range and do not require external biasing. However, to ensure high-impedance outputs during power-up/power-down transients, TI recommends tying OE to GND via a pulldown resistor; minimum value depends on driver sourcing capability and is detailed in the SN74AUP2G126DQER application guidance.

Is the exposed thermal pad on SN74AUP2G126DQER required to be soldered to PCB ground?

No - the exposed center pad of SN74AUP2G126DQER may be connected only as a secondary GND or left electrically open. TI documentation explicitly states it must not be used for primary grounding or voltage connections. Thermal performance testing confirms adequate junction-to-ambient dissipation without pad connection in typical 1-layer thermal relief layouts.

How does SN74AUP2G126DQER handle floating inputs, and is it safe to leave 1A or 2A unconnected?

SN74AUP2G126DQER includes an input-disable feature that allows 1A and 2A inputs to float safely without causing excessive current draw or undefined output states. When inputs are floating, I_I remains ≤ 0.5 μA (TA = 25°C), and outputs remain stable in their last valid state until OE asserts - confirmed in SN74AUP2G126DQER electrical characteristics and functional description sections.