Texas Instruments SN74LV174ADBR

Overview

SN74LV174ADBR from Texas Instruments is a hex D-type positive-edge-triggered flip-flop with asynchronous clear, designed for 2 V to 5.5 V operation, featuring 7.5 ns maximum propagation delay at 5 V, Ioff support for partial-power-down mode, and mixed-mode voltage operation across all ports. It serves as a synchronous data latch in digital control logic, LED matrix drivers, and 7-segment display interfaces.

For engineers reviewing the SN74LV174ADBR datasheet, SN74LV174ADBR pinout, SN74LV174ADBR application, or SN74LV174ADBR equivalent, this page delivers verified electrical specs, package mapping to TVSOP-16, functional timing behavior, real-world use cases, and two validated alternative parts - all grounded in TI's SCLS401I revision March 2023 documentation.

Technical Context

The SN74LV174ADBR implements six independent D-type flip-flops sharing a common clock (CLK) and asynchronous clear (CLR) input, operating on the rising edge of CLK. Each stage latches data only when CLR is high and setup/hold timing requirements are met - with tsu = 4.5 ns and th = 0.5 ns at VCC = 5 V.

Its balanced CMOS push-pull outputs drive ±12 mA at 5 V while maintaining low ground bounce (VOLP < 0.8 V) and undershoot (VOHV > 2.3 V) at 3.3 V. The Ioff feature disables outputs at 0 V supply, limiting leakage to 5 µA, enabling safe backplane hot-swap and multi-rail system interfacing.

Key Specifications

Pinout & Package

SN74LV174ADBR is packaged in a 16-pin TVSOP (DGV) with nominal body size 4.00 mm × 3.50 mm and 0.5 mm pitch. This ultra-thin, lead-free package supports high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LV174ADBR, SN74LVC174APWR offers higher speed at lower voltages but sacrifices Ioff-based isolation, while 74AHC174PW delivers superior timing performance yet mandates strict voltage alignment - making SN74LV174ADBR the optimal choice for mixed-voltage, hot-pluggable, or noise-sensitive industrial interfaces.

Availability

SN74LV174ADBR is available at Aetrix Electronics and suitable for LED matrix control, 7-segment display driver circuits, and industrial I/O expansion requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for SN74LV174ADBR 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 industrial, automotive, and communications markets.

The SN74LV174ADBR belongs to TI's LV logic family - engineered for low-voltage operation, high noise immunity, and seamless interoperability across mixed-supply systems in demanding industrial environments.

FAQ

What is the maximum clock frequency supported by the SN74LV174ADBR?

The SN74LV174ADBR supports up to 110 MHz maximum operating frequency (fmax) when loaded with 15 pF and powered at 5 V, as specified in Section 6.11 of the TI SCLS401I datasheet. At 3.3 V and 15 pF, fmax drops to 80 MHz. These values assume proper PCB layout, decoupling, and signal integrity practices - actual system-level frequency may be lower depending on trace capacitance and fan-out.

Does the SN74LV174ADBR support 5 V-tolerant inputs when operated at 3.3 V VCC?

Yes, the SN74LV174ADBR supports 5 V-tolerant inputs - its absolute maximum input voltage rating is 7 V, and recommended operating VI extends to 5.5 V regardless of VCC level. This allows direct connection of 5 V microcontroller GPIOs to SN74LV174ADBR inputs while VCC = 3.3 V, enabling simple level translation without external components.

What is the purpose of the Ioff feature in the SN74LV174ADBR?

The Ioff feature in the SN74LV174ADBR disables all outputs when VCC = 0 V, limiting leakage current to ≤5 µA per terminal. This prevents current backflow and bus contention during partial power-down - essential for hot-swap capable backplanes, multi-rail systems, and modular electronics where subsystems power up/down independently.

Can unused inputs on the SN74LV174ADBR be left floating?

No, unused inputs on the SN74LV174ADBR must be tied to either VCC or GND to prevent undefined logic states and potential increased power consumption. TI explicitly recommends this in Section 6.3 and Section 9.4.1 of the datasheet. Floating inputs may cause oscillation, excessive ICC, or unpredictable output behavior - especially critical for CLR and CLK lines.

What package type does the SN74LV174ADBR use, and what are its key mechanical dimensions?

The SN74LV174ADBR uses the TVSOP-16 (DGV) package: 4.00 mm × 3.50 mm body size, 0.5 mm lead pitch, and maximum height of 1.2 mm. Its thin profile and small footprint support high-density routing and automated placement - confirmed in TI's Package Information section and Mechanical Drawing NS0016A.