Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Texas Instruments SN74LVCH244ADBR

Name: SN74LVCH244ADBR
Brand: Texas Instruments
SKU: SN74LVCH244ADBR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SN74LVCH244ADBR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-SSOP (0.209", 5.30mm Width)

Datasheet:: SN74LVCH244ADBR.pdf

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

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:7,360

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

SN74LVCH244ADBR from Texas Instruments is an octal buffer/line driver with 3-state outputs, designed for 1.65 V to 3.6 V operation. It features two independent 4-bit channels, bus-hold circuitry eliminating external pull resistors, I_off support for partial-power-down mode, and mixed-mode signal translation (5-V inputs compatible with 3.3-V V_CC). It is used in data bus isolation and level-shifting applications in industrial control and embedded systems.

For engineers reviewing the SN74LVCH244ADBR datasheet, SN74LVCH244ADBR pinout, SN74LVCH244ADBR application, or SN74LVCH244ADBR equivalent, key selection criteria include its 20-pin SSOP package, 5.9 ns max propagation delay at 3.3 V, ±24 mA output drive capability, bus-hold input retention, and I_off protection during power sequencing.

Technical Context

The SN74LVCH244ADBR implements dual 4-bit noninverting buffers with independent 3-state enable controls (1OE and 2OE). Each channel passes A-inputs to Y-outputs when its OE is low; outputs enter high-impedance state when OE is high. Bus-hold circuitry actively maintains valid logic levels on unused inputs without external components.

Its I_off specification ensures outputs are disabled and isolated when V_CC = 0 V, preventing backflow current in partial-power-down systems. Input tolerance up to 5.5 V enables interoperability between 3.3-V logic domains and legacy 5-V peripherals.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.65 V to 3.6 V - supports single-supply operation across low-voltage logic families including 1.8-V and 3.3-V systems.
Max t_pd	5.9 ns at V_CC = 3.3 V - enables high-speed data buffering in timing-critical interfaces like memory buses and FPGA I/O expansion.
I_OL/I_OH	±24 mA at V_CC = 3 V - provides robust drive strength for fan-out to multiple CMOS loads or moderate capacitive traces.
Input Voltage Range	0 V to 5.5 V - allows direct connection to 5-V TTL or LVTTL outputs without level shifters in mixed-voltage systems.
Bus-Hold Current	±75 µA at V_CC = 3 V - actively retains input state during floating conditions, eliminating need for external pull-up/down resistors.
I_off	±10 µA at V_CC = 0 V - prevents damaging current flow when device is powered down while system signals remain active.

Pinout & Package

SN74LVCH244ADBR is housed in a 20-pin Small-Outline Shrink Plastic (SSOP) package (DB), 7.4 mm × 5.3 mm footprint, 2.0 mm max height, 0.65 mm lead pitch, RoHS-compliant NiPdAu finish, MSL Level-1 (unlimited reflow).

Pin/Terminal	Circuit Role	Design Meaning
1OE, 2OE	Output Enable (active-low)	Independent controls for each 4-bit channel; pulling low enables A→Y data path; high places Y outputs in high-Z.
1A1–1A4, 2A1–2A4	Data Inputs	Eight buffered inputs grouped into two 4-bit lanes; accept 0–5.5 V, supported by bus-hold circuitry.
1Y1–1Y4, 2Y1–2Y4	3-State Outputs	Eight noninverting outputs; drive strength up to ±24 mA; tolerate 5.5 V in high-Z state.
V_CC, GND	Power Supply	Single 1.65–3.6 V supply; decoupling required per TI layout guidelines to suppress ground bounce (<0.8 V typical).

Key Features

Feature	Design Value
Mixed-mode signal translation	5-V-tolerant inputs operate reliably with 3.3-V V_CC, enabling seamless interface between legacy and modern logic families.
Active bus-hold circuitry	Eliminates external pull resistors on all eight inputs, reducing BOM count and PCB area while ensuring deterministic logic states.
I_off partial-power-down protection	Disables outputs and blocks current backflow when V_CC = 0 V, critical for hot-swap and power-gated subsystems.
Low ground bounce (V_OLP)	Typical <0.8 V at V_CC = 3.3 V, TA = 25°C - minimizes noise coupling into shared ground planes during switching.
ESD robustness	Exceeds 2000-V HBM, 200-V MM, and 1000-V CDM - enhances reliability in manufacturing and field environments.

Applications

Industrial PLC Backplane Interface	Embedded Microcontroller I/O Expansion
Use Scenario: Isolating and driving parallel address/data lines between a 3.3-V microcontroller and legacy 5-V peripheral modules on a programmable logic controller backplane. IC Role / Device Role / Timing Role: Noninverting 3-state buffer providing voltage-level translation and bus contention control via independent OE signals. Use Value: Enables direct 5-V-to-3.3-V interoperation without discrete level shifters; bus-hold prevents floating inputs during module hot-swap.	Use Scenario: Expanding GPIO count of a low-power ARM Cortex-M MCU by adding eight additional bidirectional data lines routed through configurable 3-state buffers. IC Role / Device Role / Timing Role: Octal buffer with independent channel enables, supporting time-multiplexed access to shared peripheral resources. Use Value: Reduces firmware complexity by offloading bus arbitration; I_off ensures safe power sequencing when MCU enters deep-sleep mode.
FPGA Configuration Data Latching	Test Equipment Signal Conditioning
Use Scenario: Latching configuration bitstream from a 3.3-V FPGA JTAG port to 5-V test fixtures or boundary-scan adapters during production programming. IC Role / Device Role / Timing Role: High-speed octal driver with sub-6 ns propagation delay, synchronized to FPGA clock domain via OE timing control. Use Value: Meets tight setup/hold timing margins for JTAG TDI/TDO latching; 5.5-V input tolerance accommodates fixture signal overshoot.	Use Scenario: Conditioning digital stimulus signals from automated test equipment (ATE) before injection into DUTs operating at different voltage rails. IC Role / Device Role / Timing Role: Bidirectional signal conditioner with 3-state isolation, allowing shared test head connections across multiple DUT types. Use Value: Eliminates manual jumpering; ±24 mA drive supports long cable runs; bus-hold maintains known state during test transitions.

Industrial PLC Backplane Interface

Embedded Microcontroller I/O Expansion

Use Scenario: Isolating and driving parallel address/data lines between a 3.3-V microcontroller and legacy 5-V peripheral modules on a programmable logic controller backplane.

IC Role / Device Role / Timing Role: Noninverting 3-state buffer providing voltage-level translation and bus contention control via independent OE signals.

Use Value: Enables direct 5-V-to-3.3-V interoperation without discrete level shifters; bus-hold prevents floating inputs during module hot-swap.

Use Scenario: Expanding GPIO count of a low-power ARM Cortex-M MCU by adding eight additional bidirectional data lines routed through configurable 3-state buffers.

IC Role / Device Role / Timing Role: Octal buffer with independent channel enables, supporting time-multiplexed access to shared peripheral resources.

Use Value: Reduces firmware complexity by offloading bus arbitration; I_off ensures safe power sequencing when MCU enters deep-sleep mode.

FPGA Configuration Data Latching

Test Equipment Signal Conditioning

Use Scenario: Latching configuration bitstream from a 3.3-V FPGA JTAG port to 5-V test fixtures or boundary-scan adapters during production programming.

IC Role / Device Role / Timing Role: High-speed octal driver with sub-6 ns propagation delay, synchronized to FPGA clock domain via OE timing control.

Use Value: Meets tight setup/hold timing margins for JTAG TDI/TDO latching; 5.5-V input tolerance accommodates fixture signal overshoot.

Use Scenario: Conditioning digital stimulus signals from automated test equipment (ATE) before injection into DUTs operating at different voltage rails.

IC Role / Device Role / Timing Role: Bidirectional signal conditioner with 3-state isolation, allowing shared test head connections across multiple DUT types.

Use Value: Eliminates manual jumpering; ±24 mA drive supports long cable runs; bus-hold maintains known state during test transitions.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC244APWR	No bus-hold circuitry; requires external pull resistors on unused inputs; otherwise identical pinout, V_CC range, and drive strength.	Suitable where board space permits external resistors and deterministic idle-state behavior is managed externally.	Select when cost reduction outweighs BOM simplification and bus-hold is not required.
74ALVC244MTCX	Higher speed (t_pd = 3.3 ns @ 3.3 V); lower I_off (±2 µA); same 20-pin TSSOP package but different marking and thermal characteristics.	Better suited for ultra-low-latency applications such as high-frequency memory interfaces or real-time signal acquisition.	Choose when propagation delay is critical and bus-hold is not needed; verify thermal derating for continuous operation.

Compared with SN74LVC244APWR and 74ALVC244MTCX, the SN74LVCH244ADBR uniquely integrates bus-hold and I_off in a single 20-pin SSOP package, delivering system-level reliability and design simplicity for mixed-voltage industrial and embedded bus interfaces without requiring layout changes or external components.

Availability

SN74LVCH244ADBR is available at Aetrix Electronics and suitable for industrial PLC backplanes, embedded microcontroller I/O expansion, FPGA configuration latching, and ATE signal conditioning requiring stable component supply and long-term manufacturability.

Supply support for SN74LVCH244ADBR 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 SN74LVCH244ADBR belongs to TI's LVCH logic family, engineered for robust mixed-voltage interfacing in harsh environments-designed specifically to simplify bus architecture in programmable controllers, test systems, and resource-constrained edge devices.

FAQ

What is the maximum propagation delay of the SN74LVCH244ADBR at 3.3 V?

The SN74LVCH244ADBR has a maximum propagation delay (t_pd) of 5.9 ns when V_CC = 3.3 V, measured under standard load conditions (C_L = 50 pF, V_CC ± 0.3 V). This value is specified in the Switching Characteristics table of the official TI datasheet SCES009O and applies to the A→Y path with enabled output.

Does the SN74LVCH244ADBR support 5-V input signals while operating at 3.3-V V_CC?

Yes, the SN74LVCH244ADBR accepts input voltages up to 5.5 V regardless of V_CC level, enabling direct interfacing with 5-V TTL or LVTTL sources while powered from a 3.3-V rail. This mixed-mode capability is explicitly confirmed in the "Inputs Accept Voltages to 5.5 V" feature and Electrical Characteristics tables of the SN74LVCH244ADBR datasheet.

How does the bus-hold function work on the SN74LVCH244ADBR?

The SN74LVCH244ADBR integrates active bus-hold circuitry on all eight inputs (1A1–1A4, 2A1–2A4), which applies ±75 µA holding current to maintain the last-valid logic state when inputs float. This eliminates the need for external pull-up or pull-down resistors, reducing component count and PCB area-confirmed in the Functional Description and Electrical Characteristics sections of the TI datasheet.

What is the I_off specification for the SN74LVCH244ADBR, and why is it important?

The SN74LVCH244ADBR specifies I_off ≤ ±10 µA when V_CC = 0 V and VI or VO = 5.5 V. This parameter ensures outputs remain safely disabled and isolated during partial-power-down events-critical for hot-swap systems, power-gated subsystems, and multi-rail designs where backflow current could damage upstream drivers or corrupt data integrity.

Is the SN74LVCH244ADBR pin-compatible with other packages in the LVCH244 family?

Yes, the SN74LVCH244ADBR shares identical pinout and functionality with all other 20-pin variants of the SN74LVCH244A family-including DW (SOIC), PW (TSSOP), DGV (TVSOP), and RGY (VQFN)-as verified in TI's ordering information and package drawings. All variants use the same top-side marking convention (e.g., LCH244A) and support identical electrical and timing specifications.

SN74LVCH244ADBR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LVCH

Package/Case:: 20-SSOP (0.209", 5.30mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

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:: 1.65V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-SSOP

SN74LVCH244ADBR FAQ

1.How can I place an order for SN74LVCH244ADBR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LVCH244ADBR 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 SN74LVCH244ADBR reliable?

The price and inventory of SN74LVCH244ADBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCH244ADBR is usually 5 days.

3.What payment methods are accepted for SN74LVCH244ADBR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVCH244ADBR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74LVCH244ADBR?

SN74LVCH244ADBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LVCH244ADBR 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 SN74LVCH244ADBR?

For technical support, including SN74LVCH244ADBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCH244ADBR requirements.

6.How does Aetrix verify that SN74LVCH244ADBR is sourced from the original manufacturer or authorized distributors?

All SN74LVCH244ADBR 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 SN74LVCH244ADBR meets industry standards.

7.What is the process for return or replacement of SN74LVCH244ADBR?

All SN74LVCH244ADBR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCH244ADBR, 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 SN74LVCH244ADBR part is unused and in its original packaging.

Return procedure for SN74LVCH244ADBR:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…