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

STMicroelectronics 74LVX374TTR

Name: 74LVX374TTR
Brand: STMicroelectronics
SKU: 74LVX374TTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LVX374TTR

Manufacturer:: STMicroelectronics

Category:: Flip Flops

Package:: 20-TSSOP (0.173", 4.40mm Width)

Datasheet:: 74LVX374TTR.pdf

Description:: IC FF D-TYPE SNGL 8BIT 20TSSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

74LVX374TTR from STMicroelectronics is a low-voltage CMOS octal D-type flip-flop with 3-state non-inverting outputs, 5V-tolerant inputs, and operation from 2V to 3.6V. It delivers f_MAX = 160 MHz (typ.) at V_CC = 3.3V, I_CC ≤ 4 µA (max) at 25°C, and symmetrical output drive of ±4 mA (min), enabling high-speed, low-power data latching in 3.3V bus interface applications.

For engineers reviewing the 74LVX374TTR datasheet, 74LVX374TTR pinout, 74LVX374TTR application, or 74LVX374TTR equivalent, key selection criteria include 5V-tolerant input compatibility with legacy logic, balanced t_PLH/t_PHL propagation delays, power-down input protection up to 7V, and TSSOP-20 packaging for space-constrained PCB layouts.

Technical Context

This device implements eight edge-triggered D-type flip-flops with independent 3-state output control via an active-low OE input. Internal latch-up immunity and ESD protection (2 kV HBM) support robust operation in mixed-voltage systems where 5V peripherals interface with 3.3V logic domains.

Its sub-micron C2MOS process enables true CMOS low static power while maintaining high-speed performance: t_PLH/t_PHL = 6.7–10.6 ns (typ., V_CC = 3.3V, CL = 15 pF), t_PZL/t_PZH = 5.9–9.3 ns (typ.), and setup/hold times of 4.5 ns / 2.0 ns respectively - all specified across –55°C to +125°C.

Key Specifications

Parameter	Value and Actual Design Meaning
f_MAX	160 MHz (typ.) at V_CC = 3.3V - supports high-throughput data capture in synchronous bus architectures.
V_CC Range	2.0 V to 3.6 V - enables direct integration into 3.3V supply rails with 1.2V data retention capability.
I_CC	4 µA (max) at T_A = 25°C - ensures ultra-low quiescent power for battery-backed or energy-sensitive systems.
Input Voltage Tolerance	0 V to 7 V on all inputs regardless of V_CC - eliminates level-shifting requirements when interfacing 5V signals.
t_PLH/t_PHL	6.7 ns / 10.6 ns (typ., V_CC = 3.3V, CL = 15 pF) - provides predictable, symmetrical timing for clock-domain synchronization.
I_OH/I_OL	±4 mA (min) at V_CC = 3.0V - drives standard TTL loads and multiple CMOS inputs without external buffering.
V_IL/V_IH	0.8 V / 2.0 V at V_CC = 3.0V - defines noise-immune switching thresholds compatible with 3.3V LVTTL logic families.

Pinout & Package

TSSOP-20 package: 6.5 mm × 4.4 mm body, 0.65 mm pitch, 1.05 mm max height, lead-free and RoHS-compliant.

Pin/Terminal	Circuit Role	Design Meaning
1	OE	Active-low 3-state output enable - disables all Q outputs to high-impedance without affecting internal flip-flop state.
2,5,6,9,12,15,16,19	Q0–Q7	Non-inverting 3-state outputs - each independently driven by corresponding D input on CK rising edge.
3,4,7,8,13,14,17,18	D0–D7	Data inputs - sampled synchronously on positive clock edge; tolerate 0–7V regardless of V_CC.
11	CK	Clock input - edge-triggered; accepts fast transitions (dt/dv ≤ 100 ns/V at V_CC = 3V).
10	GND	Ground reference - decoupling required near pin for noise suppression in high-speed switching.
20	V_CC	Positive supply - must be stabilized between 2.0V and 3.6V; CPD = 32 pF determines dynamic current draw.

Key Features

Feature	Design Value
5V-tolerant inputs	Accepts 0–7V input signals independent of V_CC, enabling seamless 5V-to-3.3V logic interfacing without external translators.
Power-down input protection	Inputs remain safe and functional even when V_CC = 0V, preventing back-drive damage during power sequencing or brown-out conditions.
Balanced propagation delays	t_PLH ≈ t_PHL minimizes duty-cycle distortion in clocked data paths, critical for jitter-sensitive sampling applications.
Low-noise output switching	V_OLP = 0.3 V (typ.) at V_CC = 3.3V reduces ground bounce and crosstalk in dense digital layouts.
High ESD immunity	2 kV HBM rating on all pins ensures reliability during handling and board assembly without additional protection circuitry.

Applications

PCI Bus Interface

Memory Address Latching

Use Scenario: Isolating 5V PCI control signals from a 3.3V microcontroller bus while maintaining timing integrity.

IC Role / Device Role / Timing Role: Octal D-flip-flop acting as a voltage-tolerant, clock-synchronized data latch for address/data strobes.

Use Value: Eliminates discrete level shifters; OE-controlled 3-state outputs allow bidirectional bus sharing without contention.

Use Scenario: Capturing and holding memory address bits during asynchronous DRAM access cycles in embedded controllers.

IC Role / Device Role / Timing Role: Edge-triggered storage element synchronized to system clock, providing stable address hold time.

Use Value: t_S = 4.5 ns and t_H = 2.0 ns ensure reliable setup/hold margins even at 100+ MHz clock rates.

Industrial I/O Expansion

Test Equipment Signal Conditioning

Use Scenario: Buffering and isolating programmable I/O lines in PLC modules operating across –40°C to +85°C ambient.

IC Role / Device Role / Timing Role: Output-enable controlled interface between field-side sensors and 3.3V FPGA logic.

Use Value: Guaranteed operation down to –55°C and up to +125°C, with I_CC ≤ 40 µA over full temperature range.

Use Scenario: Synchronizing and conditioning high-speed digital stimulus signals in automated test equipment.

IC Role / Device Role / Timing Role: Low-skew (t_OSLH ≤ 1.5 ns) latch for aligning parallel data streams before DAC conversion.

Use Value: Matched t_PLH/t_PHL and minimal output-to-output skew preserve signal timing correlation across all 8 channels.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC374APWR	Lower V_CC min = 1.65V; higher I_OH/I_OL = ±24 mA; no 5V tolerance on outputs.	Supports 1.8V logic domains but requires external clamping for 5V input exposure.	Prefer when interfacing with 1.8V/2.5V systems and driving heavier loads; avoid in unclamped 5V-input environments.
74ALVC374PW	Wider V_CC range (1.65–3.6V); faster t_PLH = 3.2 ns (typ.); no guaranteed 7V input tolerance.	Optimized for speed-critical 2.5V/3.3V designs; lacks input overvoltage protection for mixed-voltage hot-swap use cases.	Select for maximum throughput in clean 3.3V-only systems; not suitable where input fault protection is mandatory.

Compared with SN74LVC374APWR and 74ALVC374PW, the 74LVX374TTR uniquely combines 7V input survivability, ultra-low I_CC, and full industrial temperature support - making it the only choice for ruggedized 5V/3.3V boundary applications requiring zero external protection.

Availability

74LVX374TTR is available at Aetrix Electronics and suitable for PCI interface design, memory subsystem latching, industrial I/O expansion, and test equipment signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVX374TTR 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, specializing in automotive, industrial, and power management ICs with strong analog and mixed-signal design heritage.

The 74LVX series targets low-voltage, high-speed logic interoperability - specifically engineered to bridge 5V legacy systems and emerging 3.3V/2.5V digital platforms while maintaining pin and functional compatibility with industry-standard 74-series functions.

FAQ

Can 74LVX374TTR operate with V_CC = 1.8V?

No. The 74LVX374TTR has a minimum recommended V_CC of 2.0V per its datasheet. Operation below this violates the Recommended Operating Conditions and risks undefined logic behavior, increased propagation delay variation, and potential failure to meet t_S/t_H specifications. For 1.8V systems, consider the SN74LVC374A instead.

Is the OE pin 5V-tolerant?

Yes. All inputs-including OE-are 5V-tolerant and rated for 0–7V regardless of V_CC. This allows direct connection to 5V control signals without level translation, even when V_CC = 2.5V or 3.3V, and remains valid under power-down conditions.

What is the maximum capacitive load supported at 160 MHz?

At f_MAX = 160 MHz (typ., V_CC = 3.3V), the device is characterized with C_L = 15 pF. Driving >50 pF increases propagation delay and may violate timing margins; for heavy loads, reduce clock frequency or add local buffering. C_OUT = 6 pF limits total trace + load capacitance.

Does output disable (OE = HIGH) affect internal flip-flop state?

No. The OE signal controls only the output buffer stage. Internal flip-flop states remain fully retained and continue to sample new D-input data on each CK rising edge - allowing uninterrupted data capture while outputs are tri-stated, essential for bus arbitration and hot-plug scenarios.

74LVX374TTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: 74LVX

Package/Case:: 20-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Function:: Standard

Type:: D-Type

Output Type:: Tri-State, Non-Inverted

Number of Elements:: 1

Number of Bits per Element:: 8

Clock Frequency:: 95 MHz

Max Propagation Delay @ V, Max CL:: 14.1ns @ 3.3V, 50pF

Trigger Type:: Positive Edge

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

Voltage - Supply:: 2V ~ 3.6V

Current - Quiescent (Iq):: 4 µA

Input Capacitance:: 4 pF

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-TSSOP

74LVX374TTR FAQ

1.How can I place an order for 74LVX374TTR through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVX374TTR 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 74LVX374TTR reliable?

The price and inventory of 74LVX374TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVX374TTR is usually 5 days.

3.What payment methods are accepted for 74LVX374TTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVX374TTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LVX374TTR?

74LVX374TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVX374TTR 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 74LVX374TTR?

For technical support, including 74LVX374TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVX374TTR requirements.

6.How does Aetrix verify that 74LVX374TTR is sourced from the original manufacturer or authorized distributors?

All 74LVX374TTR 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 74LVX374TTR meets industry standards.

7.What is the process for return or replacement of 74LVX374TTR?

All 74LVX374TTR units undergo pre-shipment inspection (PSI). If there is an issue with 74LVX374TTR, 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 74LVX374TTR part is unused and in its original packaging.

Return procedure for 74LVX374TTR:

1.Submit a request within 90 days.

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

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