Nexperia USA Inc. 74AHCT1G79GW,165

Overview

74AHCT1G79GW,165 from Nexperia is a single positive-edge-triggered D-type flip-flop in TSSOP5 (SOT353-1) package, designed for synchronous data latching in mixed-voltage digital systems. It operates from 4.5 V to 5.5 V, features TTL-compatible inputs, overvoltage-tolerant inputs up to 5.5 V, and delivers propagation delay as low as 3.5 ns (VCC = 5.0 V, CL = 15 pF). It is used in clock-domain interfacing, signal synchronization, and edge-sensitive control logic in industrial microcontroller peripherals.

For engineers reviewing the 74AHCT1G79GW,165 datasheet, 74AHCT1G79GW,165 pinout, 74AHCT1G79GW,165 application, or 74AHCT1G79GW,165 equivalent, key selection criteria include input voltage compatibility (TTL-level), guaranteed operation from –40 °C to +125 °C, 8 mA output drive capability, set-up/hold timing margins (3.0 ns / +2.0 ns), and TSSOP5 footprint suitability for space-constrained PCB layouts.

Technical Context

This device implements a basic synchronous edge-triggered storage cell with transparent D-input sampling on the LOW-to-HIGH clock transition. Its TTL-level input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V) ensure compatibility with legacy 5 V logic families while maintaining CMOS power efficiency.

The internal structure includes buffered inputs, a master-slave latch pair, and rail-to-rail CMOS output drivers with symmetrical impedance. Overvoltage tolerance on all inputs (up to 5.5 V independent of VCC) enables safe level translation between 3.3 V and 5 V domains without external circuitry.

Key Specifications

Pinout & Package

TSSOP5 (SOT353-1) plastic thin shrink small outline package: 5-lead, 1.25 mm body width, 0.65 mm pitch, exposed pad not present, moisture sensitivity level MSL3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT1G79GV, the 74AHCT1G79GW,165 offers 19% smaller PCB area and tighter propagation delay distribution; versus SN74LVC1G79DBVR, it guarantees correct sampling of TTL waveforms without external biasing, simplifying validation in legacy 5 V systems.

Availability

74AHCT1G79GW,165 is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller GPIO expansion, legacy bus glue logic, and power sequencing control requiring stable component supply across extended temperature ranges.

Supply support for 74AHCT1G79GW,165 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 delivering high-performance, reliable logic, analog, and MOSFET solutions with focus on efficiency, miniaturization, and automotive-grade quality.

The 74AHCT series targets industrial and consumer applications requiring TTL-compatible 5 V logic with low power and high noise immunity - optimized for robustness in mixed-voltage, thermally demanding environments.

FAQ

Is 74AHCT1G79GW,165 pin-compatible with 74AHC1G79GW?

Yes - both share identical TSSOP5 (SOT353-1) pinout and mechanical footprint. However, 74AHCT1G79GW uses TTL input thresholds (VIH = 2.0 V min), while 74AHC1G79GW uses CMOS thresholds (VIH = 3.85 V min at VCC = 5.5 V). Swapping them may cause logic misreads if driven by 74LS or other TTL sources.

What is the maximum clock frequency supported across the full temperature range?

The datasheet specifies fmax = 70 MHz at –40 °C to +125 °C (VCC = 4.5–5.5 V, CL = 50 pF). This is derived from worst-case propagation delay (11.0 ns) and minimum pulse width (4.0 ns), ensuring reliable setup/hold timing margins under industrial thermal stress.

Can this device safely interface a 3.3 V FPGA to a 5 V peripheral without external level shifters?

Yes - its inputs tolerate up to 5.5 V regardless of VCC, and its outputs swing rail-to-rail (0 V to VCC). With VCC = 5 V, it accepts 3.3 V logic-high signals directly and drives 5 V peripherals at ±8 mA. No external components are needed for unidirectional 3.3 V → 5 V translation.

Does the TSSOP5 package include an exposed thermal pad?

No - the SOT353-1 (TSSOP5) package has no exposed pad. Thermal dissipation relies solely on lead conduction and PCB copper. For applications exceeding 100 mW total power, consider the XSON5 variant (74AHCT1G79GZ) which features side-wettable flanks and lower thermal resistance.