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

Texas Instruments SN74LVTH273DW

Name: SN74LVTH273DW
Brand: Texas Instruments
SKU: SN74LVTH273DW
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LVTH273DW

Manufacturer:: Texas Instruments

Category:: Flip Flops

Package:: 20-SOIC (0.295", 7.50mm Width)

Datasheet:: SN74LVTH273DW.pdf

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

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Product details

Overview

SN74LVTH273DW from Texas Instruments is an octal positive-edge-triggered D-type flip-flop with direct-clear input, designed for 3.3-V V_CC operation while supporting 5-V TTL-level inputs and outputs. It features bus-hold circuitry on all data inputs, I_off partial-power-down protection, and operates down to 2.7 V. It is used in mixed-voltage logic interfacing, such as bridging 3.3-V microcontrollers to legacy 5-V peripheral buses.

For engineers reviewing the SN74LVTH273DW datasheet, SN74LVTH273DW pinout, SN74LVTH273DW application, or SN74LVTH273DW equivalent, key selection criteria include its 8-bit synchronous latch function, 150-MHz maximum clock frequency, bus-hold input retention, and SOIC-20 package compatibility with industrial temperature range (−40°C to 85°C).

Technical Context

The SN74LVTH273DW implements eight independent D-type flip-flops sharing a common buffered clock (CLK) and asynchronous direct-clear (CLR) input. Each flip-flop transfers data from its D input to Q output on the positive-going edge of CLK, with setup time of 2.3 ns and zero hold time at V_CC = 3.3 V.

Its mixed-mode interface capability stems from TTL-compatible input thresholds (V_IL = 0.8 V, V_IH = 2.0 V) and 5-V-tolerant inputs, while output drive meets 3.3-V LVTTL levels (V_OH ≥ 2.0 V at I_OH = −24 mA; V_OL ≤ 0.5 V at I_OL = 48 mA). Bus-hold current is ±75 µA at V_CC = 3 V.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.7 V to 3.6 V - supports unregulated battery supply and low-noise 3.3-V rail operation
Max Clock Frequency	150 MHz - enables high-speed data latching in timing-critical control paths
Input Voltage Tolerance	Up to 5.5 V - allows direct connection to 5-V TTL logic without level shifters
Output Drive Strength	I_OL = 48 mA / I_OH = −24 mA - sufficient to drive multiple LVTTL loads or short PCB traces
Bus-Hold Current	±75 µA at V_CC = 3 V - actively holds floating D inputs at valid logic levels, eliminating external pull resistors
I_off Current	±100 µA - prevents backflow current during partial power-down, protecting powered-down subsystems
Propagation Delay	t_PLH/t_PHL = 1.7–4.9 ns - ensures tight timing margins in synchronous state machines

Pinout & Package

SN74LVTH273DW is housed in a 20-pin SOIC (DW) package with 1.27-mm lead pitch, 7.5-mm body width, and 2.65-mm maximum height per JEDEC MS-013. Pin 1 is located at the top-left corner with a beveled edge or index notch.

Pin/Terminal	Circuit Role	Design Meaning
1 (CLR)	Asynchronous clear input	Active-low reset that forces all Q outputs low regardless of clock state
2–9, 11–18 (D1–D8)	Data inputs	Individual D inputs for each of eight flip-flops; feature bus-hold circuitry
3–10, 12–19 (Q1–Q8)	Registered outputs	Complementary Q outputs updated synchronously on CLK rising edge
10 (GND)	Ground reference	Power return path for logic core and I/O circuits
20 (V_CC)	Supply voltage	3.3-V nominal supply; supports operation down to 2.7 V
19 (CLK)	Clock input	Buffered positive-edge-triggered clock shared across all eight flip-flops

Key Features

Feature	Design Value
Mixed-mode signal operation	5-V tolerant inputs and 3.3-V outputs enable seamless interfacing between legacy and modern logic families
Bus-hold on all D inputs	Eliminates need for external pullup/pulldown resistors on unused or undriven data lines
I_off partial-power-down support	Disables outputs when V_CC = 0, preventing damaging current flow in multi-rail systems
Low ground bounce (V_OLP)	<0.8 V at V_CC = 3.3 V - reduces noise coupling into sensitive analog or RF sections
Latch-up immunity	>500 mA per JESD 17 - ensures robustness in harsh electrical environments

Applications

Industrial Control Backplane Interface	Automotive Body Controller Data Latching
Use Scenario: Interfacing a 3.3-V ARM-based MCU to legacy 5-V discrete I/O modules on a DIN-rail PLC backplane. IC Role / Device Role / Timing Role: Synchronous 8-bit data latch providing voltage translation and noise-immune signal registration. Use Value: Eliminates level-shifter ICs and external pull resistors while maintaining 150-MHz timing margin for deterministic scan-cycle updates.	Use Scenario: Capturing sensor status bits (door open/closed, seatbelt fastened) in a vehicle body control module before CAN transmission. IC Role / Device Role / Timing Role: Edge-triggered register holding volatile sensor states until polled by main controller. Use Value: Bus-hold retains last valid state during brief MCU sleep modes; I_off prevents backfeed when 3.3-V domain powers down.
Test Equipment Digital Pattern Generator	Network Switch Management Interface
Use Scenario: Generating precise 8-bit parallel stimulus patterns for digital IC functional testing under automated test equipment (ATE) control. IC Role / Device Role / Timing Role: High-speed D-flip-flop array synchronized to system clock for deterministic pattern sequencing. Use Value: 2.3-ns setup time and sub-5-ns propagation delay ensure reliable pattern edge alignment at 100+ MHz test rates.	Use Scenario: Isolating and latching configuration signals (LED mode, fan speed, port enable) from a 3.3-V management CPU to 5-V switch ASIC control pins. IC Role / Device Role / Timing Role: Voltage-translating register decoupling CPU timing from ASIC setup requirements. Use Value: 5-V-tolerant inputs accept direct connection to ASIC control rails; SOIC-20 footprint simplifies layout in space-constrained management boards.

Industrial Control Backplane Interface

Automotive Body Controller Data Latching

Use Scenario: Interfacing a 3.3-V ARM-based MCU to legacy 5-V discrete I/O modules on a DIN-rail PLC backplane.

IC Role / Device Role / Timing Role: Synchronous 8-bit data latch providing voltage translation and noise-immune signal registration.

Use Value: Eliminates level-shifter ICs and external pull resistors while maintaining 150-MHz timing margin for deterministic scan-cycle updates.

Use Scenario: Capturing sensor status bits (door open/closed, seatbelt fastened) in a vehicle body control module before CAN transmission.

IC Role / Device Role / Timing Role: Edge-triggered register holding volatile sensor states until polled by main controller.

Use Value: Bus-hold retains last valid state during brief MCU sleep modes; I_off prevents backfeed when 3.3-V domain powers down.

Test Equipment Digital Pattern Generator

Network Switch Management Interface

Use Scenario: Generating precise 8-bit parallel stimulus patterns for digital IC functional testing under automated test equipment (ATE) control.

IC Role / Device Role / Timing Role: High-speed D-flip-flop array synchronized to system clock for deterministic pattern sequencing.

Use Value: 2.3-ns setup time and sub-5-ns propagation delay ensure reliable pattern edge alignment at 100+ MHz test rates.

Use Scenario: Isolating and latching configuration signals (LED mode, fan speed, port enable) from a 3.3-V management CPU to 5-V switch ASIC control pins.

IC Role / Device Role / Timing Role: Voltage-translating register decoupling CPU timing from ASIC setup requirements.

Use Value: 5-V-tolerant inputs accept direct connection to ASIC control rails; SOIC-20 footprint simplifies layout in space-constrained management boards.

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
SN74LVC273PW	No bus-hold; lower drive (I_OL = 24 mA); 1.65–3.6-V V_CC	Requires external pull resistors on unused inputs; unsuitable for floating-bus environments	Choose when cost is critical and bus-hold is unnecessary; verify layout includes pull resistors.
74ALVCH273MTCX	Higher speed (250 MHz); no 5-V tolerance; different pinout (TSSOP-20)	Cannot replace SN74LVTH273DW without PCB redesign due to non-pin-compatible layout	Choose only for new designs requiring >150-MHz operation and full 3.3-V-only systems.

Compared with SN74LVTH273DW, SN74LVC273PW lacks bus-hold and 5-V tolerance-requiring additional components for legacy interface reliability-while 74ALVCH273MTCX offers higher speed but mandates board revision due to incompatible pin mapping and voltage constraints.

Availability

SN74LVTH273DW is available at Aetrix Electronics and suitable for industrial control backplanes, automotive body controllers, automated test equipment, and network switch management interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LVTH273DW 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 experience in high-reliability industrial and automotive-grade components.

The SN74LVTH273DW belongs to TI's LVTTL logic family, engineered for mixed-voltage system interoperability, low-power operation, and robust noise immunity in real-world industrial and transportation electronics.

FAQ

What is the operating voltage range for the SN74LVTH273DW?

The SN74LVTH273DW operates from 2.7 V to 3.6 V on V_CC. Its inputs tolerate up to 5.5 V, enabling direct connection to 5-V TTL logic without external level shifters. This dual-voltage capability makes SN74LVTH273DW ideal for bridging 3.3-V and 5-V domains in mixed-signal systems where rail stability varies.

Does the SN74LVTH273DW require external pullup or pulldown resistors on its data inputs?

No. The SN74LVTH273DW integrates bus-hold circuitry on all eight D inputs, which actively maintains a valid logic state when inputs are floating or undriven. Using external resistors with SN74LVTH273DW is not recommended, as it may interfere with bus-hold functionality and increase power consumption unnecessarily.

Can the SN74LVTH273DW be used in partial-power-down applications?

Yes. The SN74LVTH273DW features I_off circuitry that disables outputs when V_CC = 0, limiting current backflow to ±100 µA. This allows safe integration into multi-rail systems where one domain powers down while others remain active-ensuring SN74LVTH273DW does not disrupt upstream or downstream logic states during power sequencing.

What is the maximum clock frequency supported by the SN74LVTH273DW?

The SN74LVTH273DW supports a maximum clock frequency of 150 MHz under recommended conditions (V_CC = 3.3 V ± 0.3 V, T_A = −40°C to 85°C). This is validated by t_w (pulse duration) ≥ 3.3 ns and t_su/t_h timing margins, making SN74LVTH273DW suitable for high-throughput data capture in programmable logic controllers and test instrumentation.

Is the SN74LVTH273DW pin-compatible with other packages in the same family?

Yes-SN74LVTH273DW (SOIC-20), SN74LVTH273DBR (SSOP-20), and SN74LVTH273PWR (TSSOP-20) share identical pin functions and logic behavior. However, mechanical dimensions, thermal resistance (θ_JA = 58°C/W for DW vs. 83°C/W for PW), and reflow profiles differ. SN74LVTH273DW is not pin-compatible with non-20-pin variants like the 24-pin DW package of SN74LVTH16273.

SN74LVTH273DW Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LVTH

Package/Case:: 20-SOIC (0.295", 7.50mm Width)

Packaging:: Bulk

Product Status:: Active

Function:: Master Reset

Type:: D-Type

Output Type:: Non-Inverted

Number of Elements:: 1

Number of Bits per Element:: 8

Clock Frequency:: 150 MHz

Max Propagation Delay @ V, Max CL:: 4.9ns @ 3.3V, 50pF

Trigger Type:: Positive Edge

Current - Output High, Low:: 32mA, 64mA

Voltage - Supply:: 2.7V ~ 3.6V

Current - Quiescent (Iq):: 190 µA

Input Capacitance:: 4 pF

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-SOIC

SN74LVTH273DW FAQ

1.How can I place an order for SN74LVTH273DW through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LVTH273DW 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 SN74LVTH273DW reliable?

The price and inventory of SN74LVTH273DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVTH273DW is usually 5 days.

3.What payment methods are accepted for SN74LVTH273DW?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVTH273DW transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74LVTH273DW?

SN74LVTH273DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LVTH273DW 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 SN74LVTH273DW?

For technical support, including SN74LVTH273DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVTH273DW requirements.

6.How does Aetrix verify that SN74LVTH273DW is sourced from the original manufacturer or authorized distributors?

All SN74LVTH273DW 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 SN74LVTH273DW meets industry standards.

7.What is the process for return or replacement of SN74LVTH273DW?

All SN74LVTH273DW units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTH273DW, 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 SN74LVTH273DW part is unused and in its original packaging.

Return procedure for SN74LVTH273DW:

1.Submit a request within 90 days.

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

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