Texas Instruments SN74AUP1G79DCKT

Overview

SN74AUP1G79DCKT from Texas Instruments is a single positive-edge-triggered D-type flip-flop in SC70-5 package, operating from 0.8 V to 3.6 V, with 4 ns max propagation delay at 3.3 V, 0.9 µA max ICC, and 1.5 pF typical input capacitance. It enables low-power data synchronization in portable sensor interfaces and point-to-point signal conditioning.

For engineers reviewing the SN74AUP1G79DCKT datasheet, SN74AUP1G79DCKT pinout, SN74AUP1G79DCKT application, or SN74AUP1G79DCKT equivalent, key selection criteria include Ioff-enabled partial power-down operation, 250 mV typical input hysteresis for noise immunity, 3.6-V I/O tolerance for mixed-voltage systems, and verified performance across –40°C to +85°C.

Technical Context

The SN74AUP1G79DCKT implements a synchronous edge-triggered storage element with voltage-level clock detection-not dependent on clock rise time-enabling robust timing under slow or noisy clock edges. Its balanced CMOS push-pull output drives ±4 mA at 3 V while maintaining rail-to-rail VOH/VOL compliance.

It supports partial power-down via Ioff circuitry that disables outputs at 0 V supply, preventing back-current flow. Input hysteresis (250 mV typ. at 3.3 V) and overvoltage-tolerant inputs (up to 4.6 V) allow reliable interfacing with higher-voltage logic or noisy mechanical sensors like quadrature encoders.

Key Specifications

Pinout & Package

SN74AUP1G79DCKT uses the SC70-5 (SOT-5) package: 2.00 mm × 1.25 mm, 0.65 mm pitch, 5-terminal surface-mount package optimized for space-constrained portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G79DCKR and NC7SZ79P5X, SN74AUP1G79DCKT uniquely delivers sub-1-µA static current, 0.8-V operation, Ioff, and 250-mV hysteresis-making it the only choice for energy-constrained, mixed-voltage, or electrically noisy systems requiring deterministic edge-triggered storage.

Availability

SN74AUP1G79DCKT is available at Aetrix Electronics and suitable for barcode scanner, fingerprint biometrics, and embedded PC applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for SN74AUP1G79DCKT 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.

The AUP family-including SN74AUP1G79DCKT-is engineered for ultra-low-power portable applications, prioritizing nanowatt static consumption, wide VCC scalability, and robust signal integrity across battery-voltage ranges.

FAQ

What is the minimum supply voltage for reliable operation of the SN74AUP1G79DCKT?

The SN74AUP1G79DCKT is fully specified from 0.8 V to 3.6 V. At 0.8 V, it supports clock frequencies up to 20 MHz with 4.8 ns minimum pulse width and 4.2 ns setup time. This makes SN74AUP1G79DCKT suitable for energy-harvesting or coin-cell-powered systems where supply voltage may dip below 1.0 V during peak load.

Does the SN74AUP1G79DCKT support partial power-down, and how does it behave when VCC = 0 V?

Yes, SN74AUP1G79DCKT supports partial power-down via its Ioff feature. When VCC = 0 V, all inputs and outputs enter a high-impedance state with ≤0.6 µA leakage (TA = –40°C to +85°C). This prevents current backflow into powered sections of the system, protecting both SN74AUP1G79DCKT and connected devices during hot-swap or multi-rail sequencing.

Can the SN74AUP1G79DCKT safely interface with 3.3-V signals while operating at 1.8 V VCC?

Yes. SN74AUP1G79DCKT features 3.6-V I/O-tolerant inputs, meaning its D and CLK pins accept voltages up to 4.6 V (absolute max) regardless of VCC. When VCC = 1.8 V, the device correctly interprets 3.3-V logic-high inputs and maintains full functionality-eliminating the need for external level shifters in mixed-voltage sensor or communication interfaces.

What is the purpose of input hysteresis in the SN74AUP1G79DCKT, and how does it improve system reliability?

The SN74AUP1G79DCKT includes 250 mV typical input hysteresis at 3.3 V, which creates separate thresholds for rising and falling input transitions. This prevents oscillation or multiple toggles when driven by slow-moving or noisy signals-such as those from mechanical switches, potentiometers, or unconditioned sensor outputs-ensuring single, clean edge registration per event in applications like field transmitters or biometric scanners.

How does the propagation delay of the SN74AUP1G79DCKT vary with supply voltage and load capacitance?

SN74AUP1G79DCKT tpd decreases with higher VCC and lower CL: at 3.3 V and CL = 5 pF, tpd is 1.5–2.1 ns (typ/max); at 0.8 V and CL = 30 pF, it rises to 27.2 ns (typ). This voltage- and load-dependent behavior is documented in Tables 6.8–6.11 and Figure 1, enabling accurate timing budgeting across operating conditions without derating margins.