onsemi NC7SP126FHX

Overview

NC7SP126FHX from onsemi is a single non-inverting 3-state buffer in MicroPak2 (UDFN6) package, designed for ultra-low-power operation across V_CC = 0.9 V to 3.6 V. It delivers 2.6 ns typical propagation delay at 3.3 V, supports input/output over-voltage tolerance up to 3.6 V, and features IOFF partial power-down protection-enabling use in battery-powered IoT sensor interfaces and low-voltage FPGA I/O bridging.

For engineers reviewing the NC7SP126FHX datasheet, pinout, applications, or equivalent options, key selection criteria include its 0.9–3.6 V supply range, 2.6 mA drive capability at 3.3 V, tri-state enable timing (t_PZH/t_PHZ ≤ 8.6 ns), and MicroPak2 footprint compatibility with high-density portable PCB layouts.

Technical Context

The NC7SP126FHX implements a single-channel non-inverting buffer with active-high output enable (OE), supporting true 3-state output control. Its logic function follows OE = L → Y = high-impedance; OE = H → Y = A, with no internal pull-ups or level-shifting circuitry.

It operates across −40°C to +85°C ambient temperature, with guaranteed DC performance including VIH ≥ 0.65×V_CC, VIL ≤ 0.35×V_CC, VOH ≥ V_CC − 0.1 V, and VOL ≤ 0.1 V under full load conditions-enabling interoperability with mixed-voltage 1.2 V, 1.8 V, 2.5 V, and 3.3 V logic domains.

Key Specifications

Pinout & Package

NC7SP126FHX uses the MicroPak2 (UDFN6, 1.0 mm × 1.0 mm, 0.35 mm pitch) package with exposed pad (no thermal pad connection required). Pin 1 is marked by a dot; orientation follows Q4 standard per onsemi tape-and-reel specification.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NC7SP126P5X, NC7SP126FHX saves 58% board area and adds Pin 6 for dedicated V_CC routing; compared with SN74LVC1G125DBVR, it enables 0.9 V operation and 3.6 V I/O tolerance-critical for mixed-voltage wearables and energy-constrained nodes.

Availability

NC7SP126FHX is available at Aetrix Electronics and suitable for wearable electronics, industrial sensor nodes, and USB-C accessory designs requiring stable component supply, consistent MicroPak2 packaging, and guaranteed RoHS compliance.

Supply support for NC7SP126FHX 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, medical, and IoT applications.

The TinyLogic ULP-A family-including NC7SP126FHX-is engineered for ultra-low-power, small-footprint logic in battery-operated and space-constrained systems where supply voltage scalability and I/O robustness are critical.

FAQ

What is the maximum operating frequency supported by NC7SP126FHX?

The NC7SP126FHX does not specify a maximum clock frequency in its datasheet, as it is a combinational buffer-not a clocked device. However, with a typical propagation delay of 2.6 ns at 3.3 V and 10 pF load, it supports clean signal transmission up to approximately 100 MHz in well-terminated short-trace applications. System-level timing must account for board parasitics and load capacitance, which directly impact achievable edge rates and jitter.

Does NC7SP126FHX require external pull-up or pull-down resistors on its OE or A pins?

No, NC7SP126FHX does not require external pull-up or pull-down resistors on OE or A. Its inputs have no internal termination; however, OE must be actively driven high or low to ensure defined output state-floating OE results in indeterminate Y behavior. For robust system reset behavior, OE should be tied to a controlled logic signal or a weak pull-down (e.g., 100 kΩ to GND) when inactive.

Can NC7SP126FHX be used with a 0.9 V microcontroller and a 3.3 V peripheral simultaneously?

Yes, NC7SP126FHX can safely interface a 0.9 V microcontroller to a 3.3 V peripheral. Its inputs tolerate up to 3.6 V regardless of V_CC, so the 3.3 V peripheral output may drive A directly. When V_CC = 0.9 V, the output Y swings between ~0 V and ~0.8 V-sufficient to meet VIH thresholds of many 1.2 V logic families. Confirm receiver VIH/VIL specs before deployment.

Is the exposed pad on NC7SP126FHX's MicroPak2 package electrically connected?

No, the exposed pad on NC7SP126FHX (MicroPak2, CASE 517DP) is not electrically connected to any internal node. It serves only as a mechanical anchor and thermal mass. onsemi's datasheet specifies no internal bond wire to the pad, and electrical testing confirms isolation. It may be left unconnected or soldered to a non-powered copper pour for improved mechanical reliability-no grounding or powering is required or recommended.

How does NC7SP126FHX handle power sequencing when V_CC ramps after other system rails?

NC7SP126FHX handles asymmetric power sequencing robustly due to its IOFF feature: when V_CC = 0 V, input and output leakage remains ≤ 0.5 µA, preventing back-current into powered upstream/downstream devices. This allows safe "hot insertion" of the NC7SP126FHX into an already-active bus. OE must remain low during V_CC ramp-up to maintain Y in high-impedance until supply stabilizes.