Texas Instruments SN74LVC1G80DCKRE4

Overview

SN74LVC1G80DCKRE4 from Texas Instruments is a single positive-edge-triggered D-type flip-flop designed for 1.65V to 5.5V V_CC operation, delivering 4.2ns max propagation delay at 3.3V, ±24mA output drive, and I_off support for partial-power-down mode - used in clock frequency division, data synchronization, and edge-sensitive control logic in compact digital systems.

For engineers reviewing the SN74LVC1G80DCKRE4 datasheet, SN74LVC1G80DCKRE4 pinout, SN74LVC1G80DCKRE4 application, or SN74LVC1G80DCKRE4 equivalent, key selection criteria include its SC70-5 package footprint, 125°C operating temperature rating, 1.3ns setup time at 3.3V, I_off-enabled back-drive protection, and compatibility with mixed-voltage interface designs up to 5.5V input tolerance.

Technical Context

This device implements a synchronous edge-triggered storage element with no asynchronous preset or clear. Clock triggering occurs at a defined voltage threshold-not dependent on clock rise time-enabling robust timing behavior across varying slew rates. The internal transmission-gate-based logic ensures precise positive-edge sampling of D input relative to CLK.

It features standard CMOS inputs with 3.5pF typical input capacitance and over-voltage tolerant inputs (up to 5.5V), allowing interfacing with higher-voltage logic while powered from lower V_CC. I_off circuitry actively disables outputs during power-down, preventing current backflow and supporting hot-insertion scenarios.

Key Specifications

Pinout & Package

The SN74LVC1G80DCKRE4 is housed in a 5-pin SC70 (DCK) package measuring 2.00mm × 1.25mm, optimized for space-constrained PCB layouts and automated placement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G74DCKRE4 and 74AUP1G80GW,125, the SN74LVC1G80DCKRE4 uniquely balances wide V_CC flexibility (1.65–5.5V), 5.5V-tolerant inputs, and minimal footprint - making it optimal for voltage-translation-critical, space-constrained edge-triggering tasks without reset overhead.

Availability

SN74LVC1G80DCKRE4 is available at Aetrix Electronics and suitable for test equipment signal conditioning, industrial PLC input synchronization, and white goods motor control interface requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LVC1G80DCKRE4 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 logic solutions, with decades of expertise in high-reliability, industry-standard logic families.

The SN74LVC1G80DCKRE4 belongs to TI's LVC (Low-Voltage CMOS) single-gate logic portfolio, engineered for low-power, high-speed signal integrity in space-constrained industrial and consumer systems operating across wide voltage and temperature ranges.

FAQ

What is the maximum clock frequency supported by the SN74LVC1G80DCKRE4?

The SN74LVC1G80DCKRE4 supports up to 160MHz clock frequency across its full operating range (–40°C to +125°C) when V_CC = 1.8V, 2.5V, 3.3V, or 5.5V. This is validated under CL = 15pF load conditions per TI's SCES221T datasheet Section 5.6. At 3.3V with 15pF, the 4.2ns max t_pd enables reliable operation well above 100MHz in real-world layouts with controlled impedance routing.

Does the SN74LVC1G80DCKRE4 have asynchronous reset or set functionality?

No, the SN74LVC1G80DCKRE4 does not include asynchronous preset or clear inputs. It is a basic positive-edge-triggered D-type flip-flop with only CLK, D, Q, V_CC, and GND terminals. Its function table confirms that output state changes occur solely on the rising edge of CLK when setup/hold timing is met - making it ideal for synchronous-only applications like clock division or pipeline staging where deterministic edge-triggered behavior is required.

Can the SN74LVC1G80DCKRE4 be used for clock frequency division?

Yes, the SN74LVC1G80DCKRE4 is commonly used for clock frequency division by connecting Q to D. This creates a toggle flip-flop that divides the input clock by two. TI's datasheet Section 8.1 explicitly documents this application, noting that initialization (e.g., via MCU GPIO) may be needed to establish a known starting state since the device lacks reset functionality. The 4.2ns t_pd at 3.3V ensures minimal jitter accumulation in cascaded division stages.

What is the purpose of the I_off feature in the SN74LVC1G80DCKRE4?

The I_off feature in the SN74LVC1G80DCKRE4 disables all outputs when V_CC = 0V, limiting leakage current to ±10µA max. This prevents current backflow from live buses into a powered-down section - protecting both the SN74LVC1G80DCKRE4 and upstream drivers during partial-power-down sequences. It is essential for hot-swap capable systems and multi-rail designs where subsystems power up/down independently.

Is the SN74LVC1G80DCKRE4 compatible with 5V logic inputs while operating at 3.3V V_CC?

Yes, the SN74LVC1G80DCKRE4 accepts input voltages up to 5.5V regardless of V_CC level - a feature explicitly documented in Section 5.3 (Recommended Operating Conditions) and Section 5.1 (Absolute Maximum Ratings). When V_CC = 3.3V, applying 5V to D or CLK is safe and functional, enabling seamless interfacing with legacy 5V peripherals without external level shifters - a key advantage over standard LVC devices lacking over-voltage tolerance.