Texas Instruments SN74LV174ADR

Overview

SN74LV174ADR 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 SN74LV174ADR datasheet, SN74LV174ADR pinout, SN74LV174ADR application, or SN74LV174ADR equivalent, this page delivers verified functional identity, SOIC-16 package mapping, timing behavior across 2.5 V/3.3 V/5 V supply rails, ground-bounce and undershoot performance metrics, and validated alternative options for bus interface and output expansion use cases.

Technical Context

The SN74LV174ADR implements six independent D-type flip-flops sharing a common clock (CLK) and asynchronous clear (CLR) input, each triggered on the rising edge of CLK. Its CMOS push-pull outputs provide balanced sourcing/sinking capability up to ±12 mA at 4.5–5.5 V, with defined setup/hold times (e.g., 4.5 ns tsu at 5 V) and pulse-width requirements (5 ns minimum CLK high/low).

It supports partial-power-down via Ioff, limiting leakage to 5 µA when VCC = 0 V, and features 5-V-tolerant inputs enabling level translation from higher-voltage logic into lower-VCC domains. Latch-up immunity exceeds 250 mA per JESD17, and noise characteristics include typical VOLP < 0.8 V and VOHV > 2.3 V at 3.3 V.

Key Specifications

Pinout & Package

SN74LV174ADR is supplied in a 16-pin SOIC (D) package measuring 9.00 mm × 3.90 mm, with 1.27 mm lead pitch and RoHS-compliant NiPdAu finish. It is rated MSL Level-1 with unlimited reflow profile (260°C peak).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LV174ADR, SN74LVC174APWR offers better speed in 3.3 V domains but sacrifices 5 V input compatibility, while 74HC174D,653 provides broader voltage flexibility without Ioff or noise suppression-making SN74LV174ADR the optimal choice for mixed-supply industrial I/O where reliability and power-state control are critical.

Availability

SN74LV174ADR is available at Aetrix Electronics and suitable for LED matrix control, 7-segment display driver, and industrial I/O expansion applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant SOIC packaging.

Supply support for SN74LV174ADR 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 industrial-grade logic families and automotive-qualified timing devices.

The SN74LV174ADR belongs to TI's LV (Low-Voltage) logic portfolio, engineered for robust operation across wide supply ranges and mixed-voltage system integration-targeting industrial automation, test equipment, and human-machine interface applications.

FAQ

What is the maximum clock frequency supported by SN74LV174ADR?

The SN74LV174ADR supports up to 110 MHz maximum operating frequency at 5 V with 15 pF load, as specified in its switching characteristics table. At 3.3 V, fmax drops to 80 MHz under same conditions. These values assume proper layout, decoupling, and signal integrity-exceeding them risks setup/hold violations and metastability. The SN74LV174ADR datasheet defines timing margins conservatively to ensure reliable operation across temperature and voltage corners.

Does SN74LV174ADR support 5 V input signals when powered at 3.3 V?

Yes, SN74LV174ADR supports 5 V-tolerant inputs-its VI rating extends to 5.5 V regardless of VCC setting. This allows direct connection of 5 V control signals (e.g., from legacy microcontrollers) to SN74LV174ADR's D or CLR pins while operating at 3.3 V, eliminating external level shifters. This feature is explicitly confirmed in Section 6.3 of the SN74LV174ADR datasheet under Recommended Operating Conditions.

How does the Ioff feature function in SN74LV174ADR during power-down?

In SN74LV174ADR, the Ioff circuitry disables all outputs when VCC = 0 V, limiting leakage current to ≤5 µA per pin. This prevents back-driving of powered sections and eliminates contention on shared buses during partial system shutdown. The Ioff behavior is guaranteed across –40°C to 85°C and is independent of input voltage-inputs may float or remain at any valid logic level without affecting output isolation. This functionality is verified in the Electrical Characteristics table (Section 6.5) of the SN74LV174ADR datasheet.

What is the recommended bypass capacitor for SN74LV174ADR?

Texas Instruments recommends a 0.1 µF ceramic capacitor placed as close as possible to the VCC pin of SN74LV174ADR, with short, low-inductance traces to GND. For boards with multiple SN74LV174ADR units or high-noise environments, paralleling a 1.0 µF capacitor improves low-frequency decoupling. This guidance is documented in Section 9.3 (Power Supply Recommendations) of the SN74LV174ADR datasheet and aligns with standard high-speed CMOS layout practices.

Can SN74LV174ADR replace SN74HC174 in existing designs?

SN74LV174ADR can replace SN74HC174 in most 5 V systems, but requires validation of timing margins: SN74LV174ADR has faster tpd (7.5 ns vs. 25 ns) and lower drive strength (±12 mA vs. ±25 mA). Its 5 V input tolerance and Ioff support add value, but the absence of Q̅ outputs and different AC characteristics mean layout and timing analysis must be repeated. Direct substitution is feasible only after verifying setup/hold compliance and load driving capability in the target SN74LV174ADR application.