Texas Instruments SN74AUP1G126YZPR

Overview

SN74AUP1G126 from Texas Instruments is a low-power single bus buffer gate with tri-state output, functioning as a non-inverting driver (Y = A) controlled by an active-high output-enable (OE) input. It operates across 0.8 V to 3.6 V, delivers 4.6 ns max propagation delay at 3.3 V, consumes only 0.9 µA max ICC, and supports Ioff partial-power-down mode - ideal for point-to-point signal routing in portable SSDs and wireless peripherals.

For engineers reviewing the SN74AUP1G126 datasheet, SN74AUP1G126 pinout, SN74AUP1G126 application, or SN74AUP1G126 equivalent, key selection criteria include its 5-pin DSBGA (YZP) package, 1.5 pF typical input capacitance, 3.6-V I/O tolerance for mixed-voltage interfacing, tri-state control timing (ten/tdis), and latch-up immunity exceeding 100 mA per JESD 78 Class II.

Technical Context

This device implements a single-channel CMOS buffer with positive-logic OE control and balanced push-pull output stage. Its Ioff circuitry ensures high-impedance outputs and <0.6 µA leakage when VCC = 0 V, enabling safe back-driving in partial-power-down systems.

The input-disable feature tolerates floating inputs without oscillation, while input hysteresis improves noise immunity for slow transitions. Signal integrity is maintained via low overshoot/undershoot (<10% of VCC) and optimized drive strength for light capacitive loads up to 30 pF.

Key Specifications

Pinout & Package

SN74AUP1G126YZPR uses a 5-pin DSBGA (YZP) package measuring 0.89 mm × 1.39 mm with bottom-side ball layout. The package supports ultra-compact placement in space-constrained portable designs and features solder-ball interconnects compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G126DBVR and NC7SZ126P5X, SN74AUP1G126YZPR uniquely combines sub-1-µA ICC, 0.8-V minimum operation, and Ioff - making it the only option for battery-critical, multi-voltage, hot-pluggable portable subsystems.

Availability

SN74AUP1G126YZPR is available at Aetrix Electronics and suitable for portable SSDs, wireless peripherals, audio docks, and enterprise tablets requiring stable component supply across extended product lifecycles.

Supply support for SN74AUP1G126YZPR 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 for industrial, automotive, personal electronics, and communications markets.

The AUP family - including SN74AUP1G126YZPR - was engineered specifically for ultra-low-power, battery-operated portable applications, balancing sub-1-µA static current with robust signal integrity across 0.8–3.6 V operation.

FAQ

What is the recommended power-up sequence for SN74AUP1G126YZPR to ensure reliable tri-state behavior?

TI specifies that OE must be held low during power-up and power-down to guarantee high-impedance output. For SN74AUP1G126YZPR, tie OE to GND through a pulldown resistor (value determined by driver sink capability); do not leave OE floating. This prevents unintended output activation before VCC stabilizes, avoiding bus contention in multi-device systems.

Does SN74AUP1G126YZPR support true bidirectional data flow?

No. SN74AUP1G126YZPR is a unidirectional non-inverting buffer (Y = A) with active-high OE control. It does not implement automatic direction sensing or bus transceiver functionality. For bidirectional applications, a dedicated transceiver such as SN74AUP1T34 must be used instead of SN74AUP1G126YZPR.

Can SN74AUP1G126YZPR safely interface a 3.3-V microcontroller with a 1.2-V FPGA I/O bank?

Yes. SN74AUP1G126YZPR supports 3.6-V tolerant inputs and operates down to 0.8 V VCC. When powered at 1.2 V, its inputs accept 0–3.6 V signals, and its outputs swing rail-to-rail (0–1.2 V), making SN74AUP1G126YZPR suitable for level-shifting from 3.3-V MCUs to 1.2-V FPGA banks without external components.

What is the maximum capacitive load SN74AUP1G126YZPR can drive while maintaining 4.6 ns propagation delay?

The 4.6 ns maximum tpd for SN74AUP1G126YZPR is specified at VCC = 3.3 V with CL = 5 pF. At CL = 10 pF, tpd increases to 5.2 ns max; at CL = 15 pF, it rises to 5.7 ns max. Therefore, to maintain ≤4.6 ns delay, the total load (including trace and input capacitance) must stay at or below 5 pF - typical for short PCB runs to single downstream inputs.

How does the input hysteresis in SN74AUP1G126YZPR improve system reliability?

SN74AUP1G126YZPR incorporates input hysteresis to raise the effective VIH and lower the effective VIL thresholds, increasing noise margin by ~150 mV at 1.8 V VCC. This prevents multiple output toggles caused by slow-rising or noisy input edges - a critical advantage in mechanically noisy environments like wireless keyboards or portable audio docks where SN74AUP1G126YZPR is commonly deployed.