Nexperia USA Inc. 74LVC1G79GW,125

Overview

74LVC1G79GW,125 from Nexperia is a single positive-edge-triggered D-type flip-flop in TSSOP5 (SOT353-1) package, operating from 1.65 V to 5.5 V supply. It stores data at the D-input on LOW-to-HIGH clock transitions with 0.5 ns minimum pulse width, 2.2 ns typical propagation delay at 3.3 V, and supports mixed-voltage interfacing between 3.3 V and 5 V systems. Used in digital logic synchronization, clock domain crossing, and edge-sensitive control circuits.

For engineers reviewing the 74LVC1G79GW,125 datasheet, 74LVC1G79GW,125 pinout, 74LVC1G79GW,125 application, or 74LVC1G79GW,125 equivalent, this device serves as a compact, low-power storage element with Schmitt-trigger inputs for noise immunity, IOFF support for partial power-down, and guaranteed operation from –40 °C to +125 °C.

Technical Context

This flip-flop implements synchronous edge-triggered storage using CMOS logic with Schmitt-trigger inputs to tolerate slow signal edges. Its IOFF circuit actively disables outputs during power-down, preventing backflow current when VCC = 0 V.

The device features overvoltage-tolerant inputs up to 5.5 V independent of VCC, enabling direct interface with TTL and higher-voltage logic families. Set-up time is 1.2 ns (min) and hold time is +0.5 ns (min) at 5.5 V, ensuring robust timing margin in high-speed digital interfaces.

Key Specifications

Pinout & Package

TSSOP5 (SOT353-1) package: plastic thin shrink small outline, 5-lead, body width 1.25 mm, 0.65 mm pitch, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar D-type flip-flop applications.

Compared with SN74LVC1G79DBVR and 74AUP1G79GW,125, the 74LVC1G79GW,125 uniquely balances 5.5 V input tolerance, 500 MHz max frequency, and TSSOP5 footprint-making it optimal for space-constrained, mixed-voltage industrial controllers requiring guaranteed timing at temperature extremes.

Availability

74LVC1G79GW,125 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, and USB-C power delivery controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVC1G79GW,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, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74LVC1G79 belongs to Nexperia's LVC logic family, engineered for low-voltage, high-speed, mixed-supply digital interfacing with robust ESD protection and extended temperature qualification.

FAQ

Does 74LVC1G79GW,125 support 5 V input signals while powered from 1.8 V?

Yes. Its inputs are overvoltage tolerant up to 5.5 V regardless of VCC level, allowing direct connection to 5 V microcontroller GPIOs or legacy peripherals when VCC = 1.65–1.95 V. This eliminates external level shifters in mixed-voltage systems and is verified per JESD8-7 compliance.

What is the minimum clock pulse width required for reliable operation?

The minimum CP pulse width is 2.0 ns at VCC = 4.5–5.5 V and 3.0 ns at VCC = 1.65–1.95 V. These values ensure proper internal node charging and are measured under load conditions defined in the datasheet test circuit (Fig. 6), guaranteeing functional operation across the full temperature range.

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

When VCC = 0 V, the IOFF circuit forces Q output into high-impedance state, limiting leakage to ±2 μA maximum. This prevents backflow current from live buses (e.g., 5 V I²C or SPI lines) into the unpowered device, satisfying IEC 61000-4-2 system-level ESD robustness requirements.

Can this flip-flop be used without external pull-up or pull-down resistors on D or CP?

No. The 74LVC1G79GW,125 has no internal bias resistors. D and CP inputs require externally defined logic states; floating inputs may cause metastability, excessive current draw, or unintended toggling due to noise coupling. External termination is mandatory per JEDEC JESD78 reliability guidelines.