onsemi NL37WZ06U

Overview

NL37WZ06U from onsemi is a triple inverter IC with open-drain outputs, designed for level-shifting and wired-OR logic interfacing across mixed-voltage systems. It operates from 1.65 V to 5.5 V, delivers 2.5 ns typical propagation delay at 5 V, sinks up to 24 mA at 3.0 V, and features over-voltage tolerant inputs supporting interface between 3 V LVTTL/LVCMOS and 5 V TTL circuits.

For engineers reviewing the NL37WZ06U datasheet, pinout, applications, or equivalent options, key selection criteria include open-drain output flexibility, 1.65–5.5 V supply compatibility, −55 °C to +125 °C operating range, input overvoltage tolerance up to 7 V, and US8 package thermal performance (250 °C/W).

Technical Context

The NL37WZ06U integrates three independent inverting buffers, each terminating in an open-drain NMOS output stage that requires external pull-up to define HIGH-level voltage. Its input structure tolerates voltages up to 7 V regardless of VCC, enabling direct connection to higher-voltage buses without clamping diodes.

This architecture supports bidirectional voltage translation-e.g., driving 5 V logic from a 3 V microcontroller-by selecting appropriate pull-up voltage and resistor. The device exhibits near-zero static ICC (≤10 µA) and low capacitive loading (CIN = 2.5 pF, COUT = 4.0 pF), minimizing dynamic power and signal integrity impact in high-speed digital interfaces.

Key Specifications

Pinout & Package

Package: US8 (8-pin ultra-small surface-mount, case 493-02), 2.0 × 2.3 mm footprint, 0.65 mm pitch, Pb-free solder plating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar triple inverter with open-drain output applications.

Compared with SN74LVC1G06DBVR and MC74VHC1GT06DTT1G, the NL37WZ06U uniquely combines triple-channel density, 24 mA sink, 2.5 ns speed, and 7 V input tolerance in a single US8 package-enabling compact, robust, multi-signal level translation without trade-offs in drive or voltage range.

Availability

NL37WZ06U is available at Aetrix Electronics and suitable for industrial sensor interfaces, I²C bus expansion, microcontroller GPIO extension, and LED driver circuits requiring stable component supply across automotive, medical, and factory automation programs.

Supply support for NL37WZ06U 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, and IoT applications.

The NL37WZ06U belongs to the 37WZ logic family-designed specifically for high-speed, low-voltage, mixed-signal interfacing with robust voltage translation and minimal power consumption.

FAQ

What is the maximum input voltage the NL37WZ06U can tolerate?

The NL37WZ06U supports DC input voltages from −0.5 V to 7.0 V, independent of VCC. This overvoltage tolerance allows direct connection to 5 V or 7 V signal sources even when powered from 1.65 V, eliminating external clamping components. This specification is validated per the Absolute Maximum Ratings table in the official NL37WZ06U datasheet.

Can the NL37WZ06U be used for I²C bus extension?

Yes, the NL37WZ06U is suitable for I²C bus extension due to its open-drain outputs, which match I²C's wired-AND topology. Each output can be pulled up to a separate voltage domain, enabling level translation between 3.3 V and 5 V I²C segments. The 2.5 ns propagation delay ensures compliance with 400 kHz Fast-mode timing budgets when properly terminated.

What is the recommended pull-up resistor value for NL37WZ06U outputs?

No single "recommended" resistor applies universally-the value depends on bus capacitance, desired rise time, and pull-up voltage. For a 3.3 V pull-up with 200 pF total bus capacitance targeting ≤1 µs rise time, a 10 kΩ resistor is typical. At 24 mA sink, the NL37WZ06U supports down to ~140 Ω (for 3.3 V pull-up), but lower values increase power and reduce noise margin. Always verify with actual layout parasitics.

Does the NL37WZ06U require all inputs to be actively driven?

Yes-unused inputs on the NL37WZ06U must not be left floating. Per the datasheet's Note 5, all inputs must be tied to a defined logic HIGH or LOW voltage level (e.g., via pull-up/pull-down resistors). Floating inputs cause increased ICC, unpredictable output states, and potential latch-up in extreme cases due to internal MOSFET threshold uncertainty.

Is the NL37WZ06U pin-compatible with other triple inverter packages like SOIC-8?

No-the NL37WZ06U uses the US8 (8-pin ultra-small) package (2.0 × 2.3 mm), which is physically incompatible with standard SOIC-8 (3.9 × 4.9 mm) or TSSOP-8 footprints. While the pin assignment (1–8) matches functional order (IN A2, IN A1, GND, OUT Y3, OUT Y1, VCC, OUT Y2, IN A3), PCB layout must be redesigned for the smaller pitch and thermal pad requirements of the US8 package.