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Home > Products > Integrated Circuits (ICs) > Logic > Flip Flops

STMicroelectronics M74HCT174RM13TR

Name: M74HCT174RM13TR
Brand: STMicroelectronics
SKU: M74HCT174RM13TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: M74HCT174RM13TR

Manufacturer:: STMicroelectronics

Category:: Flip Flops

Package:: 16-SOIC (0.154", 3.90mm Width)

Datasheet:: M74HCT174RM13TR.pdf

Description:: IC FF D-TYPE SNGL 6BIT 16SO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

M74HCT174RM13TR from STMicroelectronics is a high-speed CMOS hex D-type flip-flop with asynchronous clear, operating up to 56 MHz (typ.) at V_CC = 4.5 V, featuring TTL-compatible inputs (V_IH ≥ 2.0 V, V_IL ≤ 0.8 V), symmetrical 4 mA output drive, and balanced t_PLH/t_PHL propagation delays. It is used in synchronous data latching and register staging within digital control logic, such as industrial PLC I/O modules.

For engineers reviewing the M74HCT174RM13TR datasheet, M74HCT174RM13TR pinout, M74HCT174RM13TR application, or M74HCT174RM13TR equivalent, key selection criteria include clock frequency margin, clear timing robustness, input/output voltage compatibility with legacy TTL systems, and TSSOP-16 footprint constraints for high-density PCB layouts.

Technical Context

The device implements six independent edge-triggered D flip-flops sharing a common clock and asynchronous active-low clear. Each stage transfers D-input data to Q-output on the rising edge of CK, with no internal feedback or preset functionality.

It uses silicon gate C2MOS technology for low static power (I_CC ≤ 4 µA at 25°C) and robust ESD protection on all pins. Input thresholds and output drive are fully specified across –55°C to +125°C, supporting extended industrial operation without derating.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	4.5 V to 5.5 V - Ensures stable operation with standard 5 V logic rails and ±5% supply tolerance.
f_MAX	56 MHz (typ.) at V_CC = 4.5 V - Supports high-throughput data capture in real-time control loops.
t_PLH/t_PHL	28 ns (max) at V_CC = 4.5 V - Enables precise timing alignment between parallel register stages.
I_OH/I_OL	±4 mA (min) - Drives standard TTL loads or multiple 74HCT inputs without buffering.
V_IH/V_IL	2.0 V (min) / 0.8 V (max) - Guarantees interoperability with legacy 5 V TTL outputs.
Operating Temp	–55°C to +125°C - Qualified for under-hood automotive and industrial motor drive environments.
I_CC (quiescent)	4 µA (max) at 25°C - Minimizes standby power in battery-backed or energy-sensitive systems.

Pinout & Package

TSSOP-16 package: 4.4 mm × 5.0 mm body, 0.65 mm pitch, 1.2 mm height, lead-free and RoHS-compliant.

Pin/Terminal	Circuit Role	Design Meaning
1	CLEAR	Asynchronous active-low master reset - forces all Q outputs low regardless of clock or data state.
2,5,7,10,12,15	Q0–Q5	True outputs of six D flip-flops - provide registered data storage synchronized to CK rising edge.
3,4,6,11,13,14	D0–D5	Data inputs - sampled only on CK rising edge; unaffected by CLEAR when high.
9	CLOCK	Rising-edge-triggered clock - initiates synchronous transfer from Dn to Qn.
8	GND	Reference ground - must be low-impedance return path for all switching currents.
16	V_CC	Positive supply - powers internal logic and output drivers; requires local 100 nF decoupling.

Key Features

Feature	Design Value
TTL-compatible input thresholds	Enables direct interfacing with 74LS/74F outputs without level-shifting circuitry.
Symmetrical 4 mA output drive	Supports fan-out of ≥10 74HCT inputs or driving 50 Ω transmission lines with controlled edge rates.
Balanced t_PLH/t_PHL	Reduces skew between parallel register outputs, critical for multi-bit bus synchronization.
Asynchronous clear with no setup/hold dependency	Allows immediate register reset during fault conditions without waiting for clock edge or data stability.
Extended temperature range (–55°C to +125°C)	Validates operation in uncontrolled ambient environments like motor control enclosures or outdoor telecom cabinets.

Applications

Industrial PLC I/O Register

Automotive Body Control Module

Use Scenario: Latching sensor status (e.g., door open/closed, brake pedal position) before scanning by microcontroller.

IC Role / Device Role / Timing Role: Synchronous data register holding parallel inputs until next scan cycle; CLEAR resets on system power-up or error recovery.

Use Value: Eliminates metastability risk via edge-triggered sampling and ensures deterministic reset behavior across wide temperature ranges.

Use Scenario: Staging switch commands (e.g., window up/down, mirror fold/unfold) prior to PWM driver activation.

IC Role / Device Role / Timing Role: Hex D flip-flop providing glitch-free command hold with simultaneous reset capability across all channels.

Use Value: Prevents spurious actuation during MCU boot or CAN message retransmission by enforcing clean state initialization.

Test Equipment Pattern Generator

Legacy System Bus Interface

Use Scenario: Generating repeatable digital stimulus waveforms for IC functional testing using FPGA-controlled clocking.

IC Role / Device Role / Timing Role: High-speed data latch synchronizing pattern bits to test clock domain; f_MAX ≥ 56 MHz supports >20 Mbps vector rates.

Use Value: Delivers sub-30 ns propagation delay consistency across all six bits, minimizing inter-channel skew in multi-bit test vectors.

Use Scenario: Interfacing modern microcontrollers to legacy 74LS-based address/data latches in retro-computing or instrumentation upgrades.

IC Role / Device Role / Timing Role: Drop-in replacement for 74LS174 with identical pinout and function, leveraging HCT's lower power and higher noise immunity.

Use Value: Maintains full timing compatibility while reducing board-level power dissipation by >90% versus original bipolar implementation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74HCT174PWR	Same logic function and AC specs; SOIC-16 package (4.4 mm × 9.9 mm), larger footprint than TSSOP.	Preferred where hand-soldering or socketing is required; less suitable for space-constrained boards.	Select when mechanical robustness or reworkability outweighs density requirements.
74VHC174FT	Higher V_CC range (2–5.5 V); lower I_CC (1 µA typ.), but reduced drive (±8 mA) and no guaranteed TTL compatibility below 4.5 V.	Used in mixed-voltage systems (e.g., 3.3 V logic with 5 V peripherals); not drop-in for pure 5 V TTL interfaces.	Select only if supply flexibility or ultra-low quiescent current is prioritized over guaranteed 5 V TTL interoperability.

Compared with SN74HCT174PWR and 74VHC174FT, the M74HCT174RM13TR uniquely combines TSSOP-16 compactness, guaranteed 5 V TTL compatibility, and industrial temperature support - making it optimal for high-density, mission-critical 5 V control logic.

Availability

M74HCT174RM13TR is available at Aetrix Electronics and suitable for industrial PLC I/O registers, automotive body control modules, test equipment pattern generators, and legacy system bus interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for M74HCT174RM13TR 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, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The M74HCT series targets industrial-grade 5 V logic replacement, delivering TTL-compatible performance with CMOS power efficiency and extended environmental resilience.

FAQ

Is M74HCT174RM13TR pin-compatible with 74LS174?

Yes - it features identical pinout, logic function, and DC/AC timing specifications to the 74LS174, including TTL-compatible input thresholds and same 16-pin TSSOP footprint. No PCB redesign is needed for drop-in replacement in existing 5 V systems.

What is the minimum pulse width required on the CLEAR input?

The minimum CLEAR pulse width is 15 ns (max) over –40°C to +85°C at V_CC = 4.5 V. This ensures reliable asynchronous reset even under fast transient conditions, such as power-on sequencing or fault recovery in real-time controllers.

Does M74HCT174RM13TR support hot insertion?

No - the device lacks hot-swap protection circuitry. Applying V_CC while signals are present may exceed absolute maximum ratings. Power sequencing must ensure V_CC is stable before applying input signals or clock edges.

Can unused D inputs be left floating?

No - unused D inputs must be tied to V_CC or GND. Floating inputs cause increased ICC, potential oscillation, and ESD vulnerability due to undefined CMOS gate bias. Internal protection diodes do not eliminate this risk.

M74HCT174RM13TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: 74HCT

Package/Case:: 16-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Function:: Master Reset

Type:: D-Type

Output Type:: Non-Inverted

Number of Elements:: 1

Number of Bits per Element:: 6

Clock Frequency:: 56 MHz

Max Propagation Delay @ V, Max CL:: 28ns @ 4.5V, 50pF

Trigger Type:: Positive Edge

Current - Output High, Low:: 4mA, 4mA

Voltage - Supply:: 4.5V ~ 5.5V

Current - Quiescent (Iq):: 4 µA

Input Capacitance:: 5 pF

Operating Temperature:: -55°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-SO

M74HCT174RM13TR FAQ

1.How can I place an order for M74HCT174RM13TR through Aetrix?

Please submit a Request for Quotation (RFQ) for M74HCT174RM13TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for M74HCT174RM13TR reliable?

The price and inventory of M74HCT174RM13TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M74HCT174RM13TR is usually 5 days.

3.What payment methods are accepted for M74HCT174RM13TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M74HCT174RM13TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for M74HCT174RM13TR?

M74HCT174RM13TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your M74HCT174RM13TR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for M74HCT174RM13TR?

For technical support, including M74HCT174RM13TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M74HCT174RM13TR requirements.

6.How does Aetrix verify that M74HCT174RM13TR is sourced from the original manufacturer or authorized distributors?

All M74HCT174RM13TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that M74HCT174RM13TR meets industry standards.

7.What is the process for return or replacement of M74HCT174RM13TR?

All M74HCT174RM13TR units undergo pre-shipment inspection (PSI). If there is an issue with M74HCT174RM13TR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The M74HCT174RM13TR part is unused and in its original packaging.

Return procedure for M74HCT174RM13TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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