STMicroelectronics 74LVQ174MTR

Overview

74LVQ174MTR from STMicroelectronics is a low-voltage CMOS hex D-type flip-flop with asynchronous clear (non-inverting), operating from 2.0 V to 3.6 V, featuring 150 MHz max clock frequency (typ. at V_CC = 3.3 V), 12 mA output drive (min. at V_CC = 3.0 V), and 4 µA max quiescent current at 25°C. It serves as a synchronous data latch in 3.3 V digital control and interface logic, such as bus buffering and state registration in industrial PLC I/O modules.

For engineers reviewing the 74LVQ174MTR datasheet, 74LVQ174MTR pinout, 74LVQ174MTR application, or 74LVQ174MTR equivalent, key selection criteria include guaranteed PCI bus-level drive (24 mA), balanced propagation delays (t_PLH ≅ t_PHL), 75 Ω transmission line driving capability, and latch-up immunity-critical for noise-sensitive 3.3 V logic interfacing and clock-domain synchronization.

Technical Context

The 74LVQ174MTR implements six independent edge-triggered D-type flip-flops sharing a common positive-edge clock and asynchronous active-low clear. Its C2MOS sub-micron silicon gate process enables low dynamic noise (V_OLP = 0.3 V typ.) and symmetrical output impedance (|I_OH| = I_OL = 12 mA min.), supporting clean signal integrity on terminated lines.

All inputs and outputs include ESD protection (2 kV HBM), and DC specifications are fully guaranteed across –55°C to +125°C. Truth table operation ensures Q outputs retain prior state when CLR is high and reset to low when CLR is asserted, independent of clock or data inputs.

Key Specifications

Pinout & Package

74LVQ174MTR is supplied in a 16-pin SOIC (Small Outline Integrated Circuit) package with standard 1.27 mm pitch, compliant with JEDEC MS-012. Pin layout follows industry-standard 74-series numbering and function mapping.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC174APWR and MC74VHC174DT, the 74LVQ174MTR uniquely combines 150 MHz speed, 24 mA PCI drive, –55°C operation, and 0.3 V V_OLP-making it optimal for noise-critical, high-reliability 3.3 V control logic where timing margin and signal fidelity are non-negotiable.

Availability

74LVQ174MTR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, test equipment digital pattern generation, and medical infusion pump controllers requiring stable component supply across long production lifecycles.

Supply support for 74LVQ174MTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The 74LVQ series targets low-voltage, low-noise 3.3 V logic applications-specifically engineered for noise-sensitive digital control, high-speed data capture, and robust operation in extended temperature environments.

FAQ

What is the minimum V_CC required for reliable operation of the 74LVQ174MTR?

The 74LVQ174MTR is specified for reliable operation down to 2.0 V V_CC, with full DC and AC performance guaranteed across this range. At 2.0 V, f_MAX drops to 60 MHz (min.), and output drive reduces to 8 mA (min.), but all logic functions-including asynchronous clear-remain fully functional per the truth table.

Can the 74LVQ174MTR drive a 50 Ω transmission line directly?

No-the 74LVQ174MTR is characterized for 75 Ω transmission line driving (per datasheet Section 1). Driving a 50 Ω line would exceed its 12 mA (min.) output rating under typical conditions and risk violating VOL/V OH specs; a dedicated line driver or series termination is required for 50 Ω systems.

Is the 74LVQ174MTR pin-compatible with the 74HC174 in a 3.3 V design?

Yes-74LVQ174MTR is pin- and function-compatible with 74HC174, including identical SO-16 pinout and truth table behavior. However, it operates natively at 3.3 V with lower I_CC (4 µA vs. ~40 µA), tighter propagation delay matching, and enhanced ESD/latch-up immunity-making it a drop-in upgrade without layout changes.

Does the 74LVQ174MTR support hot insertion or live insertion into a powered backplane?

No-while it features 2 kV HBM ESD protection, the 74LVQ174MTR lacks explicit hot-swap circuitry (e.g., power-up sequencing, I_OFF protection, or bus-hold). Applying V_CC before GND or connecting to a live bus may cause latch-up or parametric violation; use only in cold-insertion or properly sequenced power systems.