Texas Instruments SN74LVC1G79DBVR

Overview

SN74LVC1G79DBVR from Texas Instruments is a single positive-edge-triggered D-type flip-flop in a 5-pin SOT-23 (DBV) package, operating from 1.65V to 5.5V V_CC, with 6ns max propagation delay at 3.3V/50pF, ±24mA output drive, and I_off support for partial-power-down mode. It functions as a synchronous data latch in low-voltage digital control paths.

For engineers reviewing the SN74LVC1G79DBVR datasheet, SN74LVC1G79DBVR pinout, SN74LVC1G79DBVR application, or SN74LVC1G79DBVR equivalent, key selection considerations include its 1.65–5.5V supply range, 125°C operational temperature, 5-pin NanoFree™ footprint, and guaranteed data retention down to 1.5V V_CC.

Technical Context

The SN74LVC1G79DBVR implements a single D-type latch with clock-triggering referenced to a voltage threshold-not edge rate-enabling robust operation across varying input slew rates. Its CMOS inputs accept up to 5.5V regardless of V_CC, supporting level translation from higher-voltage domains into 1.65V–3.3V logic systems.

It features balanced push-pull outputs capable of sourcing/sinking ±24mA at 3.3V, with I_off circuitry that disables all I/O pins during power-down to prevent back-drive current and latch-up. The device meets JESD78 Class II latch-up performance (>100mA) and supports full industrial temperature range (–40°C to +125°C).

Key Specifications

Pinout & Package

SN74LVC1G79DBVR uses the 5-pin SOT-23 (DBV) package, measuring 2.90mm × 2.80mm, with NanoFree™ construction where the silicon die serves as the package substrate.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G79DBVR, SN74LVC1G74DBVR provides dual functionality at the cost of I_off protection, while 74LVC1G80GW,125 matches electrical behavior in a smaller SC70 package but demands layout revision-making SN74LVC1G79DBVR optimal for drop-in replacement in existing SOT-23 designs requiring robust power-down safety.

Availability

SN74LVC1G79DBVR is available at Aetrix Electronics and suitable for test and measurement instrumentation, enterprise switching control planes, and telecom infrastructure requiring stable component supply across extended temperature and voltage ranges.

Supply support for SN74LVC1G79DBVR 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 over 90 years of innovation in high-reliability components.

The SN74LVC1G79DBVR belongs to TI's LVC low-voltage logic family, designed for energy-efficient, voltage-flexible digital interfacing in space- and power-constrained applications across industrial, communications, and consumer systems.

FAQ

What is the maximum clock frequency supported by the SN74LVC1G79DBVR?

The SN74LVC1G79DBVR supports a maximum clock frequency of 160MHz across its full operating temperature range (–40°C to +125°C) and supply voltage range (1.65V to 5.5V), as verified in timing specifications for both 15pF and 50pF load conditions per TI's SCES220V datasheet.

Does the SN74LVC1G79DBVR support level translation between different voltage domains?

Yes, the SN74LVC1G79DBVR supports bidirectional level translation: its inputs tolerate up to 5.5V regardless of V_CC, and its outputs swing rail-to-rail (0V to V_CC). This enables use as a 5V-to-1.8V or 3.3V-to-1.65V translator when V_CC is set to the lower domain voltage.

What is the purpose of the I_off feature in the SN74LVC1G79DBVR?

The I_off feature in the SN74LVC1G79DBVR disables all input and output terminals when V_CC = 0V, limiting leakage current to ±10µA. This prevents back-drive current from live signal lines into a powered-down subsystem, protecting both the SN74LVC1G79DBVR and connected devices during partial-power-down sequences.

Can the SN74LVC1G79DBVR retain its output state during brief power interruptions?

Yes, the SN74LVC1G79DBVR guarantees data retention down to 1.5V V_CC. When V_CC drops to 1.5V (e.g., during brown-out), the Q output holds its last valid state; recovery to nominal V_CC restores normal operation without reset or loss of stored value.

Is the SN74LVC1G79DBVR pin-compatible with other 5-pin logic devices in SOT-23 packages?

The SN74LVC1G79DBVR uses standard 5-pin SOT-23 (DBV) pinout (D-CLK-GND-Q-V_CC), matching TI's industry-standard assignment for single-gate logic. It is pin-compatible with SN74LVC1G74DBVR and SN74LVC1G125DBVR in the same package, though functional equivalence requires verification of logic type and I/O behavior.