Texas Instruments SN74AUP2G125DQER

Overview

SN74AUP2G125DQER 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 rails. It features two independent noninverting buffers with active-low output-enable (1OE, 2OE), enabling point-to-point signal isolation in battery-powered portable systems. Key confirmed parameters: 3.6-V I/O tolerance, 5.4 ns max propagation delay at 3.3 V, 0.9 mA max ICC, 1.5 pF typical input capacitance, and Ioff support for partial-power-down mode.

For engineers reviewing the SN74AUP2G125DQER datasheet, SN74AUP2G125DQER pinout, SN74AUP2G125DQER application, or SN74AUP2G125DQER equivalent, this page delivers verified electrical specs, package-specific terminal mapping, real-world use cases in low-voltage interface isolation, and validated alternative options for design flexibility and supply continuity.

Technical Context

The SN74AUP2G125DQER implements dual independent noninverting buffer logic with 3-state outputs controlled by separate active-low enable inputs (1OE, 2OE). Each channel drives its respective output (1Y, 2Y) only when its OE is low; otherwise, the output enters high-impedance state. Input-disable functionality allows safe floating of A inputs without leakage or oscillation.

Its AUP-family architecture delivers ultra-low static and dynamic power: ICC ≤ 0.9 mA across 0.8–3.6 V, Cpd = 4 pF typical at 3.3 V, and CI = 1.5 pF typical. The device supports mixed-mode signaling via 3.6-V-tolerant I/Os while operating from as low as 0.8 V, making it suitable for voltage-level translation between sub-1V logic and 3.3-V domains.

Key Specifications

Pinout & Package

X2SON-8 (DQE) package: 1.4 mm × 1.2 mm, 0.4 mm max height, no leads, exposed thermal pad centered under die (to be connected to GND or left floating per TI recommendation).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC2G125DQER and SN74AUC2G125DQER, the SN74AUP2G125DQER uniquely balances ultra-low power (0.9 mA ICC), wide voltage operation (0.8–3.6 V), Ioff support, and input hysteresis - making it the sole choice for battery-constrained, multi-rail, and hot-plug-capable designs.

Availability

SN74AUP2G125DQER is available at Aetrix Electronics and suitable for mobile sensor hubs, wearable display interfaces, low-power MCU GPIO expansion, and industrial edge node signal conditioning requiring stable component supply and long-term lifecycle support.

Supply support for SN74AUP2G125DQER 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 solutions with over 90 years of innovation in power efficiency and signal integrity.

The AUP family was designed specifically for battery-powered portable electronics, delivering industry-leading static and dynamic power reduction across ultra-wide VCC ranges without compromising timing or noise performance.

FAQ

What is the maximum propagation delay of the SN74AUP2G125DQER at 3.3 V?

The SN74AUP2G125DQER has a maximum propagation delay (tpd) of 5.4 ns at VCC = 3.3 V, CL = 5 pF, and TA = –40°C to +85°C. This value is measured from input (A) to output (Y) transition and reflects worst-case timing under industrial temperature conditions. The SN74AUP2G125DQER maintains this performance while consuming only 0.9 mA ICC, distinguishing it from faster but higher-power alternatives.

Does the SN74AUP2G125DQER support partial-power-down operation?

Yes, the SN74AUP2G125DQER fully supports partial-power-down operation via its Ioff circuitry. When VCC = 0 V, the Ioff feature disables all outputs and blocks current backflow from live I/Os into the unpowered device, preventing damage and system malfunction. This behavior is explicitly characterized in the datasheet with Ioff ≤ 0.6 mA at 3.6 V, confirming robustness for hot-swap and modular power architectures using the SN74AUP2G125DQER.

What is the recommended handling for the exposed thermal pad on the SN74AUP2G125DQER package?

The exposed center pad on the SN74AUP2G125DQER's X2SON-8 package must be connected only as a secondary GND or left electrically open - it must never be tied to VCC or any other voltage. TI documentation explicitly prohibits connecting it to anything other than GND or leaving it floating. Proper PCB layout requires a dedicated thermal pad connected to the ground plane with multiple vias; incorrect connection risks latch-up or degraded thermal performance of the SN74AUP2G125DQER.

Can the SN74AUP2G125DQER interface between 1.2-V and 3.3-V logic domains?

Yes, the SN74AUP2G125DQER can safely interface between 1.2-V and 3.3-V logic domains. Its inputs accept voltages from 0.8 V to 3.6 V (VIH min = 0.65 × VCC at 1.2 V → 0.78 V), and its outputs are 3.6-V tolerant regardless of VCC setting. When powered at 1.2 V, the SN74AUP2G125DQER drives valid 3.3-V-compatible logic levels onto 3.3-V buses, eliminating external level-shifting components in mixed-voltage systems.

How does input hysteresis improve noise immunity in the SN74AUP2G125DQER?

Input hysteresis in the SN74AUP2G125DQER provides distinct VIH and VIL thresholds (e.g., VIH = 0.7 × VCC, VIL = 0.3 × VCC at 1.4 V), creating a noise margin that prevents false switching during slow or noisy transitions. This feature allows the SN74AUP2G125DQER to reliably interpret weak or slew-limited signals - such as those from mechanical switches or long PCB traces - without oscillation or metastability, directly enhancing system robustness in electrically noisy environments.