Texas Instruments SN74LV174ADE4

Overview

SN74LV174ADE4 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 SN74LV174ADE4 datasheet, SN74LV174ADE4 pinout, SN74LV174ADE4 application, or SN74LV174ADE4 equivalent, this page delivers verified electrical specs, package mapping to SOIC-16 (D), functional timing behavior, and real-world implementation guidance for bus interface and output expansion use cases.

Technical Context

The SN74LV174ADE4 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 the D-input value only when CLR is high and meets setup/hold timing requirements - t_su = 4.5 ns and t_h = 0.5 ns at V_CC = 5 V.

It uses balanced CMOS push-pull outputs capable of ±12 mA drive at 5 V, with ground bounce (V_OLP) < 0.8 V and undershoot (V_OHV) > 2.3 V at 3.3 V, enabling stable interfacing in mixed-voltage systems. Its Ioff specification (5 µA max at 0 V V_CC) ensures isolation during power sequencing.

Key Specifications

Pinout & Package

SN74LV174ADE4 is packaged in a 16-pin SOIC (D) body measuring 9.00 mm × 3.90 mm, with standard 1.27 mm pitch and gull-wing leads suitable for automated PCB assembly and reflow.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC174APWR and 74HC174D,653, the SN74LV174ADE4 uniquely balances 2–5.5 V operation, Ioff-enabled power sequencing, and 7.5 ns speed - making it optimal for industrial control and mixed-voltage embedded interfaces where reliability across power states is essential.

Availability

SN74LV174ADE4 is available at Aetrix Electronics and suitable for industrial I/O expansion, LED matrix control, 7-segment display interfaces, and programmable logic glue applications requiring stable component supply across extended temperature ranges (–40°C to +85°C).

Supply support for SN74LV174ADE4 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 50 years of innovation in high-reliability digital ICs.

The SN74LV174ADE4 belongs to TI's LV-A family of low-voltage, high-speed logic devices engineered for robust mixed-signal interfacing in industrial automation, test equipment, and display subsystems.

FAQ

What is the maximum clock frequency supported by SN74LV174ADE4?

The SN74LV174ADE4 supports up to 110 MHz maximum clock frequency when loaded with 15 pF and operated at V_CC = 5 V, based on its 7.5 ns maximum propagation delay and timing margins defined in the datasheet. At 3.3 V, f_max drops to 80 MHz due to reduced drive strength and increased t_pd. System-level timing must account for board trace capacitance and fanout.

Does SN74LV174ADE4 support partial-power-down operation?

Yes, SN74LV174ADE4 supports partial-power-down operation via its Ioff feature: when V_CC = 0 V, all outputs enter high-impedance state with leakage current limited to 5 µA maximum, preventing back-driving of powered circuitry. This is confirmed in Section 6.5 Electrical Characteristics and Feature 5 of the datasheet.

Can SN74LV174ADE4 interface directly with 5 V logic while powered at 3.3 V?

Yes, SN74LV174ADE4 supports mixed-mode voltage operation: its inputs tolerate up to 5.5 V regardless of V_CC, allowing direct connection to 5 V signal sources while operating at 3.3 V. This is explicitly stated in Feature 6 and Section 6.3 Recommended Operating Conditions.

What is the function of the CLR pin on SN74LV174ADE4?

The CLR pin on SN74LV174ADE4 is an active-low asynchronous clear input that forces all six Q outputs low immediately, independent of the clock signal. When CLR is low, D inputs are ignored and outputs remain latched low until CLR returns high - verified in Table 8-1 Function Table and Section 5 Pin Functions.

Which package type does SN74LV174ADE4 use?

SN74LV174ADE4 uses the SOIC-16 (D) package, with dimensions 9.00 mm × 3.90 mm and 1.27 mm lead pitch. This is confirmed in the Package Information table, Mechanical Data section, and Orderable Addendum where SN74LV174ADE4 maps to "D" package code.