onsemi NC7SP17FHX

Overview

NC7SP17FHX from onsemi is a single-channel Schmitt-trigger buffer IC designed for ultra-low-power signal conditioning in space-constrained applications. It operates from 0.9 V to 3.6 V supply, delivers 2.6 ns typical propagation delay at 3.3 V, supports ±2.6 mA drive strength, and features IOFF partial power-down protection. It is used in battery-powered sensor interfaces and level-shifting I²C/SPI signal lines.

For engineers reviewing the NC7SP17FHX datasheet, pinout, applications, or equivalent options, this page provides verified package mapping (MicroPak2, UDFN6), confirmed Schmitt-trigger hysteresis values (0.29–1.8 V across VCC), IOFF leakage spec (≤0.5 µA), and validated alternative options for low-voltage logic buffering with overvoltage-tolerant inputs.

Technical Context

The NC7SP17FHX implements a single non-inverting buffer with hysteresis-based input thresholding to reject noise on slow or noisy digital signals. Its Schmitt-trigger input has asymmetric thresholds (VP = 0.62–2.6 V, VN = 0.34–0.6 V) and programmable hysteresis (0.29–1.8 V) dependent on VCC, enabling robust operation across 0.9–3.6 V supply range.

It supports IOFF functionality: when VCC = 0 V, input and output are high-impedance and overvoltage tolerant up to 3.6 V, preventing back-drive current in partial-power-down systems. Output drive capability is specified at ±2.6 mA (sink/source) at 3.3 V, with VOH ≥ VCC − 0.1 V and VOL ≤ 0.1 V under load.

Key Specifications

Pinout & Package

NC7SP17FHX is packaged in MicroPak2 (UDFN6, 1.0 mm × 1.0 mm, 0.35 mm pitch), a leadless, bottom-terminal package requiring solder paste stencil control and reflow profile optimization for void-free assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-voltage Schmitt-trigger buffer applications.

Compared with SN74LVC1G17DBVR and 74LVC1G17GW,125, the NC7SP17FHX uniquely supports 0.9 V operation, includes IOFF for true power-gating isolation, and fits in 1.0 mm² area - making it the only viable option for sub-1.2 V wearables and energy-harvesting nodes requiring Schmitt-trigger noise immunity.

Availability

NC7SP17FHX is available at Aetrix Electronics and suitable for industrial sensor interfaces, IoT edge node signal conditioning, wearable biometric front-ends, and automotive body control subsystems requiring stable component supply across long-lifecycle programs.

Supply support for NC7SP17FHX 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The TinyLogic ULP-A family - including NC7SP17FHX - was engineered specifically for ultra-low-power, small-footprint logic in battery-constrained and space-sensitive systems, emphasizing sub-1 V operation, IOFF isolation, and Schmitt-trigger noise immunity.

FAQ

What is the minimum operating voltage for NC7SP17FHX?

The NC7SP17FHX is fully specified to operate down to 0.9 V VCC, with functional performance including propagation delay, hysteresis, and drive strength guaranteed across the full −40°C to +85°C temperature range. At 0.9 V, its typical propagation delay is 64.4 ns (CL = 10 pF), and hysteresis is 0.29 V - making NC7SP17FHX suitable for energy-harvesting and coin-cell-powered designs where other logic buffers fail to start.

Does NC7SP17FHX support IOFF (power-off isolation)?

Yes, NC7SP17FHX supports IOFF: when VCC = 0 V, both input and output terminals enter high-impedance state with leakage ≤0.5 µA, and remain overvoltage tolerant up to 3.6 V. This feature prevents back-driving and current leakage between powered and unpowered sections of a multi-rail system - a key requirement in portable devices with segmented power domains. The NC7SP17FHX datasheet explicitly confirms IOFF behavior in the DC Electrical Characteristics table under "Power Off Leakage Current".

What package type is used for NC7SP17FHX?

NC7SP17FHX uses the MicroPak2 package (case 517DP), a 6-terminal UDFN (1.0 mm × 1.0 mm, 0.35 mm pitch) with bottom-side thermal pads and no leads. It differs from the SC-88A and standard MicroPak variants - the FHX suffix specifically denotes MicroPak2. This package enables ultra-dense placement and excellent thermal performance in space-constrained PCBs, but requires precise stencil design and reflow profiling to ensure void-free solder joints.

Can NC7SP17FHX interface with 3.3 V signals while running at 1.2 V VCC?

Yes, NC7SP17FHX inputs and outputs are overvoltage tolerant up to 3.6 V regardless of VCC level. When operating at 1.2 V VCC, it safely accepts 3.3 V input signals (e.g., from a sensor or MCU GPIO) without damage or clamping diodes, and outputs logic-high at ~1.1 V (VCC − 0.1 V). This makes NC7SP17FHX ideal for bidirectional level shifting in mixed-voltage systems - a capability confirmed in the Absolute Maximum Ratings and Recommended Operating Conditions tables of the NC7SP17FHX datasheet.

What is the typical propagation delay of NC7SP17FHX at 3.3 V?

The typical propagation delay (tPLH/tPHL) of NC7SP17FHX is 2.6 ns at VCC = 3.3 V, RL = 1 MΩ, and CL = 10 pF - measured from input transition (10%–90%) to output transition (10%–90%). This value is specified in the AC Electrical Characteristics table and reflects optimized performance for high-speed, low-power signal routing. Delay increases predictably at lower VCC (e.g., 9.0 ns at 3.0 V, 12.2 ns at 1.65 V), enabling accurate timing budgeting across the full operating range of NC7SP17FHX.