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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Texas Instruments SN74LVCZ244ADW

Name: SN74LVCZ244ADW
Brand: Texas Instruments
SKU: SN74LVCZ244ADW
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LVCZ244ADW

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: SN74LVCZ244ADW.pdf

Description:: IC BUF NON-INVERT 3.6V 20SOIC

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Product details

Overview

SN74LVCZ244ADW from Texas Instruments is an octal 3-state buffer/driver IC designed for 2.7-V to 3.6-V V_CC operation, with dual independent 4-bit channels, 5.5-V-tolerant inputs, and 5.9-ns propagation delay at 3.3 V. It serves as a level-translating bus interface in mixed-voltage systems such as server memory subsystems and network switch data paths.

For engineers reviewing the SN74LVCZ244ADW datasheet, SN74LVCZ244ADW pinout, SN74LVCZ244ADW application, or SN74LVCZ244ADW equivalent, key selection criteria include its I_off support for live insertion, power-up 3-state behavior, ±24-mA output drive capability, and compatibility with both 3.3-V and 5-V input logic levels in industrial embedded and computing infrastructure designs.

Technical Context

The SN74LVCZ244ADW implements two independent 4-bit non-inverting buffer sections, each controlled by a dedicated output-enable (OE) input. Its CMOS design enables balanced high/low output drive and supports hot-swap operation via I_off circuitry that disables outputs when V_CC = 0 V.

It features overvoltage-tolerant inputs (up to 5.5 V), enabling bidirectional voltage translation between 3.3-V domains and legacy 5-V logic without external components. The device maintains high-impedance outputs during power-up/down when OE is tied to V_CC via a pullup resistor, preventing bus contention.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.7 V to 3.6 V - Enables operation in standard 3.3-V supply rails with margin for ripple and tolerance.
Input Voltage Tolerance	0 V to 5.5 V - Allows direct interfacing with 5-V TTL/CMOS outputs without level-shifting circuitry.
t_pd (Max)	5.9 ns at V_CC = 3.3 V - Supports high-speed data transfer in memory address/data buses up to ~170 MHz.
I_OL/I_OH	±24 mA per output - Drives moderate capacitive loads (e.g., 1–2 standard CMOS inputs or short PCB traces).
I_off	±5 µA at V_I/V_O = 5.5 V - Blocks back-current during partial power-down, protecting powered-down subsystems.
Operating Temperature	–40°C to +125°C - Qualified for extended-temperature industrial and networking equipment environments.
Power-Up 3-State	Active below 1.5 V V_CC - Ensures outputs remain high-Z during brown-out and cold-start sequences.

Pinout & Package

SN74LVCZ244ADW uses a SOIC-20 (DW) package measuring 12.80 mm × 7.50 mm, with 1.27-mm lead pitch and gull-wing leads. It is RoHS-compliant, green (halogen-free), and rated MSL Level-1 (unlimited floor life at ≤30°C/60% RH).

Pin/Terminal	Circuit Role	Design Meaning
1, 19	1OE, 2OE	Active-low output-enable controls for Channel 1 (pins 1A1–1A4 → 1Y1–1Y4) and Channel 2 (2A1–2A4 → 2Y1–2Y4).
2, 4, 6, 8, 11, 13, 15, 17	1A1–1A4, 2A1–2A4	Eight buffered input terminals - accept 0–5.5 V logic signals regardless of V_CC.
3, 5, 7, 9, 12, 14, 16, 18	2Y4–2Y1, 1Y4–1Y1	Eight 3-state output terminals - drive loads with ±24 mA while maintaining high-Z when OE = high.
10	GND	Ground reference for all internal circuitry and I/O - must be low-impedance connection to system ground plane.
20	V_CC	Primary power supply - requires local 0.1-µF ceramic bypass capacitor placed within 3 mm of pin.

Key Features

Feature	Design Value
Mixed-mode signal operation	5-V-tolerant inputs enable seamless integration into 3.3-V systems interfacing with legacy 5-V peripherals or FPGAs.
I_off protection	Prevents damaging current flow from live inputs/outputs into a powered-down device - essential for hot-pluggable modules.
Power-up 3-state	Guarantees high-impedance outputs during V_CC ramp-up/down - eliminates bus conflicts in power sequenced systems.
Low ground bounce (V_OLP)	<0.8 V at V_CC = 3.3 V - minimizes noise coupling into shared ground paths during simultaneous switching.
Latch-up immunity	Exceeds 100 mA per JESD78 Class II - ensures robustness against transient-induced latch-up in noisy industrial environments.

Applications

Server Memory Interface	Network Switch Data Path
Use Scenario: Buffering address and control signals between a 3.3-V CPU/memory controller and DDR SDRAM modules operating at 2.5 V or 3.3 V. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing isolation, drive strength, and voltage-level compatibility across memory subsystem boundaries. Use Value: Eliminates need for discrete level shifters while supporting fast t_pd (5.9 ns) to meet tight memory timing budgets.	Use Scenario: Driving parallel status/control lines between ASIC-based switch fabric and management microcontrollers or PHY interfaces. IC Role / Device Role / Timing Role: Dual-channel octal driver enabling independent enable control for separate functional blocks (e.g., port monitoring vs. configuration registers). Use Value: I_off and power-up 3-state prevent data corruption during hot-swap of line cards or firmware updates.
Industrial PC Backplane	Embedded Storage Controller
Use Scenario: Interfacing ISA/PCI-style expansion slots with modern 3.3-V host controllers in ruggedized IPCs. IC Role / Device Role / Timing Role: Bus transceiver buffer translating 5-V legacy peripheral signals to 3.3-V host logic while maintaining signal integrity. Use Value: 5.5-V input tolerance allows direct connection to 5-V slot signaling without external resistors or translators.	Use Scenario: Isolating NAND flash I/O lines from a 3.3-V SoC in solid-state storage modules subject to thermal cycling. IC Role / Device Role / Timing Role: Output-enabled driver managing chip-enable and write-protect signals with precise timing control. Use Value: –40°C to +125°C operating range and latch-up immunity ensure reliability in sealed, fanless storage enclosures.

Server Memory Interface

Network Switch Data Path

Use Scenario: Buffering address and control signals between a 3.3-V CPU/memory controller and DDR SDRAM modules operating at 2.5 V or 3.3 V.

IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing isolation, drive strength, and voltage-level compatibility across memory subsystem boundaries.

Use Value: Eliminates need for discrete level shifters while supporting fast t_pd (5.9 ns) to meet tight memory timing budgets.

Use Scenario: Driving parallel status/control lines between ASIC-based switch fabric and management microcontrollers or PHY interfaces.

IC Role / Device Role / Timing Role: Dual-channel octal driver enabling independent enable control for separate functional blocks (e.g., port monitoring vs. configuration registers).

Use Value: I_off and power-up 3-state prevent data corruption during hot-swap of line cards or firmware updates.

Industrial PC Backplane

Embedded Storage Controller

Use Scenario: Interfacing ISA/PCI-style expansion slots with modern 3.3-V host controllers in ruggedized IPCs.

IC Role / Device Role / Timing Role: Bus transceiver buffer translating 5-V legacy peripheral signals to 3.3-V host logic while maintaining signal integrity.

Use Value: 5.5-V input tolerance allows direct connection to 5-V slot signaling without external resistors or translators.

Use Scenario: Isolating NAND flash I/O lines from a 3.3-V SoC in solid-state storage modules subject to thermal cycling.

IC Role / Device Role / Timing Role: Output-enabled driver managing chip-enable and write-protect signals with precise timing control.

Use Value: –40°C to +125°C operating range and latch-up immunity ensure reliability in sealed, fanless storage enclosures.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC244A	No Z-series features: lacks I_off, power-up 3-state, and 5.5-V input tolerance - max VI = V_CC + 0.5 V.	Not suitable for hot-insertion or mixed-voltage systems; limited to single-supply 3.3-V-only designs.	Select SN74LVCZ244ADW when live insertion, partial power-down, or 5-V interfacing is required.
74ALVC244	Lower V_CC range (1.65–3.6 V); identical pinout but no I_off or power-up 3-state; t_pd = 3.3 ns at 3.3 V.	Better speed in low-voltage systems, but no protection for unpowered operation - unsuitable for hot-swap backplanes.	Choose 74ALVC244 only if system operates strictly at 1.8 V or 2.5 V and hot-swap is not needed.

Compared with SN74LVC244A and 74ALVC244, SN74LVCZ244ADW uniquely combines 5.5-V input tolerance, I_off, and power-up 3-state in a pin-compatible SOIC-20 package - making it the sole option for robust mixed-voltage hot-swap interfaces in servers and networking gear.

Availability

SN74LVCZ244ADW is available at Aetrix Electronics and suitable for server memory subsystems, network switch data paths, industrial PC backplanes, and embedded storage controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LVCZ244ADW 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 delivering analog and embedded processing solutions, with over 90 years of innovation in logic, power management, and signal chain technologies.

The SN74LVCZ244ADW belongs to TI's LVCZ advanced logic family, engineered specifically for high-reliability, mixed-voltage interface applications in computing, communications, and industrial infrastructure where live insertion and power sequencing resilience are critical.

FAQ

What is the maximum input voltage rating for SN74LVCZ244ADW?

The SN74LVCZ244ADW supports input voltages up to 5.5 V regardless of V_CC level - a key Z-series feature enabling direct interfacing with 5-V logic families without external level shifters. This specification is guaranteed across the full operating temperature range (–40°C to +125°C) and is validated per absolute maximum ratings in the official TI datasheet SCES274I.

Does SN74LVCZ244ADW support hot-plug operation?

Yes, SN74LVCZ244ADW fully supports hot-plug operation through two integrated features: I_off circuitry that disables outputs and blocks back-current when V_CC = 0 V, and power-up 3-state logic that holds outputs in high-impedance during power ramp-up/down. These capabilities are explicitly documented in TI's SN74LVCZ244A datasheet sections 9.1 and 9.3, and are validated per JESD78 Class II latch-up testing.

What is the typical propagation delay of SN74LVCZ244ADW at 3.3 V?

The typical propagation delay (t_pd) of SN74LVCZ244ADW is 5.9 ns at V_CC = 3.3 V and T_A = 25°C, with a maximum of 6.4 ns over the full –40°C to +125°C operating range. This value is measured under standard load conditions (C_L = 30 pF, ΔV = 3 V) and reflects the worst-case delay across all eight buffers in the device, as specified in Table 7.7 of the TI SCES274I datasheet.

Can SN74LVCZ244ADW be used in a 2.5-V system?

No, SN74LVCZ244ADW is not rated for 2.5-V operation. Its recommended V_CC range is strictly 2.7 V to 3.6 V per Section 7.3 of the TI datasheet. Operating below 2.7 V may result in undefined logic thresholds, increased propagation delay, or failure to meet VOL/VOH specifications - particularly at temperature extremes. For 2.5-V systems, consider TI's SN74ALVC244 or compatible alternatives.

What package type does SN74LVCZ244ADW use?

SN74LVCZ244ADW uses a SOIC-20 (DW) package with dimensions 12.80 mm × 7.50 mm, 1.27-mm lead pitch, and gull-wing leads. It is RoHS-compliant, green (halogen-free), and moisture sensitivity level (MSL) rated Level-1 - indicating unlimited floor life under standard storage conditions. This package variant is confirmed in TI's orderable addendum and mechanical drawings DB0020A.

SN74LVCZ244ADW Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LVCZ

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

Packaging:: Tube

Product Status:: Obsolete

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 2

Number of Bits per Element:: 4

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 24mA, 24mA

Voltage - Supply:: 2.7V ~ 3.6V

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-SOIC

SN74LVCZ244ADW FAQ

1.How can I place an order for SN74LVCZ244ADW through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LVCZ244ADW 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 SN74LVCZ244ADW reliable?

The price and inventory of SN74LVCZ244ADW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCZ244ADW is usually 5 days.

3.What payment methods are accepted for SN74LVCZ244ADW?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVCZ244ADW transactions.

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4.How is shipping managed for SN74LVCZ244ADW?

SN74LVCZ244ADW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LVCZ244ADW 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 SN74LVCZ244ADW?

For technical support, including SN74LVCZ244ADW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCZ244ADW requirements.

6.How does Aetrix verify that SN74LVCZ244ADW is sourced from the original manufacturer or authorized distributors?

All SN74LVCZ244ADW 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 SN74LVCZ244ADW meets industry standards.

7.What is the process for return or replacement of SN74LVCZ244ADW?

All SN74LVCZ244ADW units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCZ244ADW, 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 SN74LVCZ244ADW part is unused and in its original packaging.

Return procedure for SN74LVCZ244ADW:

1.Submit a request within 90 days.

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

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