Texas Instruments 74AUP1G125DCKRG4

Overview

74AUP1G125DCKRG4 from Texas Instruments is a single low-power bus buffer gate with 3-state output, designed for signal isolation and level translation in portable electronics. It operates across 0.8 V to 3.6 V supply, delivers ≤4.6 ns propagation delay at 3.3 V, supports Ioff partial-power-down mode, and features 3.6-V I/O tolerance - enabling mixed-voltage interfacing in SSDs, tablets, and wireless peripherals.

For engineers reviewing the 74AUP1G125DCKRG4 datasheet, 74AUP1G125DCKRG4 pinout, 74AUP1G125DCKRG4 application, or 74AUP1G125DCKRG4 equivalent, key selection criteria include its ultra-low ICC (0.9 µA max), 1.5 pF input capacitance, active-low OE control, and SC70-5 package compatibility with space-constrained PCB layouts.

Technical Context

The 74AUP1G125DCKRG4 implements a noninverting buffer with active-low 3-state enable logic: when OE is low, Y = A; when OE is high, Y enters high-impedance state. Its balanced CMOS push-pull output drives ±4 mA at 3 V while maintaining rail-to-rail VOH/VOL compliance under load.

It integrates Ioff circuitry to disable inputs/outputs during power-down, preventing back-current flow, and includes clamp diodes on all I/O pins for ESD robustness (2000 V HBM, 1000 V CDM). Input hysteresis improves noise immunity for slow-transition signals without requiring external Schmitt triggers.

Key Specifications

Pinout & Package

74AUP1G125DCKRG4 is packaged in SC70-5 (DCK) with nominal body size 2.00 mm × 1.25 mm and 0.65 mm pitch. The package supports reflow soldering and is compatible with standard pick-and-place equipment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G125DCKR and NC7SZ125P5X, the 74AUP1G125DCKRG4 uniquely combines sub-µA static current, Ioff-enabled power-domain isolation, and 4.6 ns speed in SC70 - making it optimal for battery-critical, multi-rail portable systems where reliability and layout density are prioritized.

Availability

74AUP1G125DCKRG4 is available at Aetrix Electronics and suitable for SSD client storage, tablet display interfaces, and wireless peripheral designs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for 74AUP1G125DCKRG4 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 delivering analog and embedded processing solutions, with decades of expertise in low-power logic families and automotive-grade reliability.

The AUP family - including the 74AUP1G125DCKRG4 - was engineered specifically for battery-powered portable applications demanding ultra-low static/dynamic power across 0.8–3.6 V operation while preserving signal integrity and system-level robustness.

FAQ

What is the recommended power-up sequence for 74AUP1G125DCKRG4?

OE must be held high (via pullup to VCC) before or simultaneously with VCC ramp-up to guarantee Y remains in high-impedance during power-on. TI specifies a minimum pullup resistor value based on driver sink capability - typically 10 kΩ to 100 kΩ depending on system noise margin and rise time requirements. This prevents unintended output assertion during brown-out conditions.

Does 74AUP1G125DCKRG4 support mixed-voltage operation between 1.8 V and 3.3 V domains?

Yes. The 74AUP1G125DCKRG4 accepts input voltages up to 3.6 V regardless of VCC, enabling 3.3-V signals to safely drive a 1.8-V powered device. Its 3-state output also tolerates 3.3-V bus voltages while VCC = 1.8 V, making it suitable for bidirectional level translation in shared-data-bus architectures without external components.

How does the Ioff feature function in 74AUP1G125DCKRG4 during system power-down?

When VCC = 0 V, the Ioff circuitry disables both input and output structures, limiting leakage current to ≤0.6 µA per pin (TA = –40°C to +85°C). This prevents current backflow from live buses into unpowered sections - critical for hot-swap modules, battery-backed subsystems, and multi-rail SoC interfaces where rail sequencing is uncontrolled.

Can 74AUP1G125DCKRG4 drive an LED directly?

Yes - at VCC = 3.3 V, the 74AUP1G125DCKRG4 can source/sink up to 4 mA continuously, sufficient for indicator LEDs with series resistors ≥825 Ω. However, for sustained illumination or higher brightness, dedicated LED drivers are preferred due to thermal limits and lack of current regulation in the 74AUP1G125DCKRG4.

What is the maximum capacitive load supported by 74AUP1G125DCKRG4 while maintaining 4.6 ns tpd?

The 4.6 ns maximum propagation delay is specified at CL = 5 pF and VCC = 3.3 V. As load capacitance increases, tpd rises nonlinearly: at CL = 10 pF, tpd ≤ 5.2 ns; at CL = 15 pF, ≤ 6.8 ns; at CL = 30 pF, ≤ 7.1 ns. For designs targeting ≤5 ns timing, keep total node capacitance (trace + receiver + probe) below 6 pF.