Texas Instruments SN74LV175ADBR

Overview

SN74LV175ADBR from Texas Instruments is a quadruple positive-edge-triggered D-type flip-flop with asynchronous clear, designed for 2 V to 5.5 V operation. It features complementary Q and Q̅ outputs per stage, 7.5 ns maximum propagation delay at 5 V, Ioff support for partial-power-down mode, and mixed-mode voltage interface capability across all ports. It serves as a synchronous storage register in digital control logic and bus-hold applications.

For engineers reviewing the SN74LV175ADBR datasheet, SN74LV175ADBR pinout, SN74LV175ADBR application, or SN74LV175ADBR equivalent, this page delivers verified functional identity, SOIC-16 package mapping, timing and voltage specifications at 2.5 V/3.3 V/5 V, Ioff behavior under power-down, and validated alternative options for latch-based designs requiring low-voltage compatibility and rail-to-rail input tolerance.

Technical Context

The SN74LV175ADBR implements four independent D-type latches triggered on the rising edge of CLK, each with dedicated CLR input asserting asynchronous reset. Its CMOS design enables rail-to-rail input tolerance (VI up to 5.5 V regardless of VCC), supporting level translation from higher-voltage buses into 2.5 V or 3.3 V logic domains.

Each flip-flop provides true and complement outputs (Q and Q̅), enabling direct connection to differential receivers or dual-rail logic without external inverters. The Ioff circuitry actively disables outputs when VCC = 0 V, preventing back-current flow during hot-insertion or partial system power-down scenarios.

Key Specifications

Pinout & Package

SN74LV175ADBR is supplied in a 16-pin SOIC (D) package measuring 10.3 mm × 1.95 mm (body size), with standard 1.27 mm pitch and gull-wing leads. Pin 1 is located at the top-left corner adjacent to the index notch or beveled edge.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LV175ADBR, SN74LVC175APWR trades 5 V compatibility for improved speed at 3.3 V, while 74HC175N offers broader voltage headroom but omits Ioff and input overvoltage resilience - making SN74LV175ADBR uniquely suited for mixed-voltage industrial interfaces requiring safe power sequencing.

Availability

SN74LV175ADBR is available at Aetrix Electronics and suitable for industrial control logic, serial-to-parallel conversion, programmable logic interface, and test pattern generation requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for SN74LV175ADBR 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 for industrial, automotive, and communications markets.

The SN74LV175ADBR belongs to the LV family of low-voltage CMOS logic devices, engineered for interoperability across 2.5 V, 3.3 V, and 5 V systems while maintaining robust noise immunity and power-down safety.

FAQ

What is the maximum clock frequency supported by SN74LV175ADBR?

The SN74LV175ADBR supports up to 125 MHz maximum clock frequency when loaded with CL = 15 pF at VCC = 5 V, based on its 7.5 ns maximum propagation delay and timing margins. At 3.3 V, fmax drops to 75 MHz (CL = 15 pF), and at 2.5 V it is 45 MHz. These values assume proper decoupling, controlled trace impedance, and adherence to setup/hold timing requirements specified in the datasheet.

Does SN74LV175ADBR support partial power-down operation?

Yes, SN74LV175ADBR supports partial power-down operation via its Ioff feature. When VCC = 0 V, the outputs are actively disabled and leakage current remains below 5 µA, preventing current backflow from live inputs into the unpowered device. This behavior is explicitly characterized in Section 6.5 of the datasheet and applies across the full –40°C to +85°C temperature range.

Can SN74LV175ADBR interface directly with 5 V logic inputs while operating at 3.3 V VCC?

Yes, SN74LV175ADBR accepts input voltages up to 5.5 V regardless of VCC level, enabling direct connection to 5 V logic outputs without external level-shifting components. This rail-to-rail input tolerance is guaranteed across the full operating temperature range and is documented in Section 6.3 (Recommended Operating Conditions) and Section 6.1 (Absolute Maximum Ratings).

What package type is used for SN74LV175ADBR?

SN74LV175ADBR uses a 16-pin SOIC (D) package with body dimensions of 10.3 mm × 1.95 mm and 1.27 mm lead pitch. This surface-mount package is RoHS-compliant, moisture sensitivity level 1, and rated for reflow up to 260°C. The part marking "LV175A" appears on the top surface, and pin 1 is identified by a beveled edge or index notch.

How does the CLR input function in SN74LV175ADBR?

The CLR input in SN74LV175ADBR is an asynchronous active-low clear that forces all Q outputs low immediately, independent of the clock signal. Its minimum pulse width is 5 ns at VCC = 5 V (Section 6.8), and it overrides any data present at the D inputs. The function table in Section 8.4 confirms that CLR takes priority over CLK and D, ensuring deterministic reset behavior in safety-critical control sequences.