Texas Instruments SN74AUC1G79DCKRG4

Overview

SN74AUC1G79DCKRG4 from Texas Instruments is a single positive-edge-triggered D-type flip-flop in SC70-5 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 for clock-synchronized data latching in portable audio and embedded timing paths.

For engineers reviewing the SN74AUC1G79DCKRG4 datasheet, SN74AUC1G79DCKRG4 pinout, SN74AUC1G79DCKRG4 application, or SN74AUC1G79DCKRG4 equivalent, key selection criteria include sub-2 ns tpd at 1.8 V, 1.65–1.95 V optimized supply range, Ioff-enabled backflow protection, 5-pin SC70 footprint compatibility, and JESD 22 ESD ratings up to 2000-V HBM.

Technical Context

This device implements a synchronous edge-triggered storage element with transparent data capture on the rising clock edge, independent of input slew rate. Its logic diagram confirms non-inverting Q output and no internal reset/set control - only CLK, D, Q, VCC, and GND terminals define its functional behavior.

Designed for mixed-voltage systems, it supports 3.6-V I/O tolerance while powered from as low as 0.8 V, enabling interoperability between 1.8-V logic domains and higher-voltage peripherals. The Ioff circuit actively disables outputs during power-down to prevent current backflow into powered rails.

Key Specifications

Pinout & Package

SN74AUC1G79DCKRG4 uses the SC70-5 (DCK) package: 2.00 mm × 1.25 mm body, 0.65 mm pitch, 1.1 mm max height, with pin 1 marked by index area on top-side silkscreen.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AUC1G79DCKRG4, SN74LVC1G79DCKR trades sub-1-V operation and 1.9 ns speed for broader vendor availability, while NC7SZ79P5X sacrifices Ioff and ultra-low ICC to support 5-V logic - making SN74AUC1G79DCKRG4 optimal for space-constrained, battery-sensitive 1.8-V designs requiring robust power sequencing.

Availability

SN74AUC1G79DCKRG4 is available at Aetrix Electronics and suitable for portable audio, SSD command latching, and embedded PC boot sequencing requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant SC70 packaging.

Supply support for SN74AUC1G79DCKRG4 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 company specializing in analog, embedded processing, and logic solutions, with over 50 years of leadership in high-reliability interface and timing components.

SN74AUC1G79DCKRG4 belongs to TI's AUC logic family - engineered for ultra-high-speed, low-voltage operation in portable and power-sensitive applications where sub-2 ns propagation delay and Ioff-enabled power gating are essential.

FAQ

What is the minimum supply voltage for reliable operation of SN74AUC1G79DCKRG4?

The SN74AUC1G79DCKRG4 operates reliably down to 0.8 V VCC, with guaranteed timing and logic functionality across –40°C to 85°C. At 0.8 V, tpd increases to 5 ns and output drive drops to ±0.7 mA, but the device remains fully functional - a key differentiator from standard LVC-family variants that require ≥1.65 V.

Does SN74AUC1G79DCKRG4 support hot-swapping between powered and unpowered system sections?

Yes. SN74AUC1G79DCKRG4 incorporates Ioff circuitry that disables outputs and blocks current backflow when VCC = 0 V. This allows safe insertion into live backplanes or connection to powered peripherals during partial-power-down sequences - verified per JESD 78 Class II latch-up testing.

What is the maximum clock frequency supported by SN74AUC1G79DCKRG4 at 1.8 V?

At 1.8 V VCC and CL = 15 pF, SN74AUC1G79DCKRG4 supports up to 250 MHz clock frequency (tw = 1.7 ns minimum pulse width). This is derived from tpd = 1.9 ns and setup/hold timing margins - enabling use in high-speed serial link control paths and DDR-related timing circuits.

Can SN74AUC1G79DCKRG4 interface directly with 3.3-V GPIOs without level shifters?

Yes. SN74AUC1G79DCKRG4 features 3.6-V I/O tolerance on all inputs and outputs, allowing direct connection to 3.3-V drivers and receivers while powered from 1.8 V. Input thresholds scale with VCC (VIH = 0.65 × VCC), ensuring noise-immune recognition of 3.3-V logic levels.

Is the SC70 package of SN74AUC1G79DCKRG4 compatible with standard reflow profiles?

Yes. SN74AUC1G79DCKRG4 carries JEDEC Level-1 moisture sensitivity rating and is qualified for peak reflow temperatures up to 260°C. Its SC70-5 (DCK) package has 0.65 mm pitch and 1.1 mm max height - compatible with IPC-7351 land patterns and standard Type 3 solder paste stencils.