NXP Semiconductors 74LVC1G99GD,125

Overview

74LVC1G99GD,125 from Nexperia is an ultra-configurable single-gate logic IC with 3-state output, Schmitt-trigger inputs, and configurable logic functions (AND, OR, NAND, NOR, XOR, XNOR, inverter, buffer, MUX) via direct VCC/GND pin strapping. It operates from 1.65 V to 5.5 V, supports mixed-voltage interfacing with 5 V tolerant inputs, and delivers ±24 mA output drive at 3.0 V - used in FPGA I/O expansion, sensor interface level-shifting, and programmable logic glue in space-constrained industrial controllers.

For engineers reviewing the 74LVC1G99GD,125 datasheet, 74LVC1G99GD,125 pinout, 74LVC1G99GD,125 application, or 74LVC1G99GD,125 equivalent, key selection criteria include its 8-pin XSON package footprint, IOFF partial power-down capability, Schmitt-trigger noise immunity for slow-rising signals, and functional configurability without external components.

Technical Context

The 74LVC1G99GD,125 implements a single configurable logic cell with four data inputs (A–D), one active-low output enable (OE), and a 3-state output (Y). Its Schmitt-trigger input structure provides hysteresis (e.g., 0.48 V typical at 3.0 V), enabling robust operation with slow or noisy signals. All logic configurations are set statically by hardwiring A–D to VCC or GND - no configuration registers or clocks required.

It features IOFF circuitry that disables outputs and blocks backflow current during partial power-down, meeting JEDEC JESD8-7/5/B standards across 1.65–5.5 V supply range. Input and disabled output pins tolerate up to 5.5 V regardless of VCC state, supporting true mixed-voltage domain bridging in battery-backed or hot-swap systems.

Key Specifications

Pinout & Package

XSON8 ultra-thin package (SOT996-2), 1.35 × 1.0 × 0.35 mm body, no leads, 8-terminal surface-mount design optimized for PCB area <1.4 mm².

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar configurable logic gate applications.

Compared with 74LVC1G97GV,125, the 74LVC1G99GD,125 adds essential Schmitt-trigger noise rejection for sensor and switch interfaces; compared with SN74LVC1G99DBVR, it offers 65% smaller PCB area and higher density - critical for wearables and miniaturized industrial modules.

Availability

74LVC1G99GD,125 is available at Aetrix Electronics and suitable for industrial sensor interfaces, FPGA I/O expansion, automotive body control modules, and consumer IoT power sequencing requiring stable component supply and long-term lifecycle support.

Supply support for 74LVC1G99GD,125 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

Nexperia is a global semiconductor expert focused on essential efficiency technologies, delivering high-performance logic, power, analog, and RF solutions for automotive, industrial, and consumer markets.

The 74LVC1G99 belongs to Nexperia's ultra-compact configurable logic family, designed specifically to replace multiple discrete gates in space- and power-constrained embedded systems while maintaining full compatibility with industry-standard LVC voltage and timing specifications.

FAQ

What logic functions can be implemented with the 74LVC1G99GD,125?

The 74LVC1G99GD,125 supports 16+ logic configurations including AND, OR, NAND, NOR, XOR, XNOR, inverter, buffer, and 2-input multiplexer - selected by hardwiring its four inputs (A–D) to VCC or GND. No programming or external components are needed; all functions are static and defined at power-up.

Does the 74LVC1G99GD,125 require external pull-up or pull-down resistors?

No. The 74LVC1G99GD,125 has no internal weak pull-ups or pull-downs, but its inputs accept direct connection to VCC or GND for configuration. External resistors are unnecessary unless implementing dynamic logic selection via MCU GPIOs - in which case 10 kΩ series resistors are recommended for current limiting.

How does the IOFF feature protect the device during power-down?

When VCC = 0 V, the IOFF circuitry disables both input and output buffers, limiting leakage current to ±2 μA maximum even if 5.5 V is applied to any pin. This prevents damaging reverse current flow through the device, enabling safe hot-swap and partial power-down in multi-rail systems without external protection diodes.

Can the 74LVC1G99GD,125 be used in a 5 V system with 3.3 V microcontroller?

Yes. Its 5 V tolerant inputs accept 0–5.5 V signals regardless of VCC voltage, and its output swing follows VCC. With VCC = 3.3 V, it safely receives 5 V sensor or transceiver signals and drives 3.3 V logic levels - eliminating level-shifter ICs in mixed-voltage signal paths.