Texas Instruments SN74AUC2G79DCURG4

Overview

SN74AUC2G79DCURG4 from Texas Instruments is a dual positive-edge-triggered D-type flip-flop in an 8-pin VSSOP (DCU) package, operating from 0.8 V to 2.7 V with 1.9 ns max propagation delay at 1.8 V, ±8-mA output drive, and Ioff support for partial power-down mode - used in high-speed low-voltage data synchronization and clock-domain crossing in portable and battery-powered logic systems.

For engineers reviewing the SN74AUC2G79DCURG4 datasheet, SN74AUC2G79DCURG4 pinout, SN74AUC2G79DCURG4 application, or SN74AUC2G79DCURG4 equivalent, key selection criteria include sub-2-ns timing at 1.8 V, 3.6-V I/O tolerance for mixed-mode interfacing, NanoFree™-compatible footprint options, and validated latch-up immunity exceeding 100 mA per JESD 78 Class II.

Technical Context

This device implements two independent D-type flip-flops, each triggered on the rising edge of its dedicated clock input (1CLK, 2CLK), with asynchronous data sampling at D inputs and registered Q outputs. Its design targets ultra-low-voltage operation down to 0.8 V while maintaining full 3.6-V I/O tolerance - enabling direct interface with higher-voltage logic without level shifters.

The integrated Ioff circuitry disables outputs during power-down, preventing backflow current when VCC = 0 V, and ESD protection meets 2000-V HBM, 200-V MM, and 1000-V CDM standards. Latch-up performance exceeds 100 mA per JESD 78 Class II, ensuring robustness in noisy industrial environments.

Key Specifications

Pinout & Package

VSSOP (DCU) package: 8-pin, 2.0 mm × 1.25 mm body, 0.5-mm pitch, 0.9-mm max height, RoHS-compliant NIPDAU/SN finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AUC2G79DCURG4, SN74LVC2G74DCUR trades speed and voltage flexibility for broader legacy compatibility, while 74AUP2G79GS,115 reduces static power by 90% but sacrifices I/O voltage robustness - making SN74AUC2G79DCURG4 optimal for mixed-rail, high-speed, low-voltage embedded control.

Availability

SN74AUC2G79DCURG4 is available at Aetrix Electronics and suitable for high-speed portable electronics, industrial I/O modules, and mixed-voltage FPGA interface designs requiring stable component supply across extended temperature ranges (–40°C to 85°C).

Supply support for SN74AUC2G79DCURG4 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with over 90 years of innovation in precision analog and low-power digital ICs.

The SN74AUC2G79DCURG4 belongs to TI's AUC logic family - engineered for ultra-high-speed, ultra-low-voltage operation in space-constrained portable and battery-powered applications where timing precision and power efficiency are critical.

FAQ

What is the minimum operating voltage for SN74AUC2G79DCURG4?

The SN74AUC2G79DCURG4 operates down to 0.8 V, with guaranteed functionality across the full 0.8 V to 2.7 V supply range. At 0.8 V, it maintains specified setup/hold times and output drive capability, enabling use in emerging sub-1-V microcontroller domains and energy-harvesting systems where SN74AUC2G79DCURG4 delivers deterministic timing without voltage boosting.

Does SN74AUC2G79DCURG4 support hot-plug or partial power-down operation?

Yes, SN74AUC2G79DCURG4 features Ioff circuitry that actively disables outputs when VCC = 0 V, preventing damaging current backflow from live I/O lines into the unpowered device. This makes SN74AUC2G79DCURG4 suitable for hot-swap controllers, modular backplanes, and multi-rail systems where power sequencing is non-uniform and SN74AUC2G79DCURG4 must remain electrically isolated during power transitions.

What is the maximum clock frequency supported by SN74AUC2G79DCURG4 at 1.8 V?

At 1.8 V and CL = 15 pF, SN74AUC2G79DCURG4 supports a maximum clock frequency of 250 MHz, derived from its 1.9 ns max propagation delay and verified timing parameters (tw = 1 ns, tsu = 0.6 ns, th = 0.1 ns). This allows SN74AUC2G79DCURG4 to serve as a reliable data sampler in DDR source-synchronous interfaces and high-speed serial link framing logic.

Is SN74AUC2G79DCURG4 pin-compatible with other packages in the same family?

SN74AUC2G79DCURG4 uses the VSSOP (DCU) 8-pin package with 0.5-mm pitch and Q3 pin-1 orientation. It shares identical pinout with SN74AUC2G79DCTR (SSOP-DCT) and SN74AUC2G79YZPR (DSBGA-YZP), enabling drop-in replacement across form factors. All variants maintain the same VCC–1D–1CLK–GND–2CLK–2D–1Q–2Q assignment, so SN74AUC2G79DCURG4 can be substituted without PCB redesign when footprint constraints allow.

How does the ESD protection of SN74AUC2G79DCURG4 compare to standard industry requirements?

SN74AUC2G79DCURG4 exceeds JEDEC-standard ESD ratings: 2000-V HBM (Class II), 200-V MM, and 1000-V CDM - surpassing typical industrial requirements (e.g., 2000-V HBM, 200-V MM). This robustness allows SN74AUC2G79DCURG4 to operate reliably in assembly-line handling, field-deployed equipment, and electrostatic-prone environments without additional protection circuitry, reducing system-level BOM cost and board area.