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

Texas Instruments SN74AUCH16244ZQLR

Name: SN74AUCH16244ZQLR
Brand: Texas Instruments
SKU: SN74AUCH16244ZQLR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74AUCH16244ZQLR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 56-VFBGA

Datasheet:: SN74AUCH16244ZQLR.pdf

Description:: IC BUFFER NON-INVERT 2.7V 56BGA

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Product details

Overview

SN74AUCH16244ZQLR from Texas Instruments is a 16-bit noninverting buffer/driver with 3-state outputs, optimized for 1.65-V to 1.95-V V_CC operation, delivering 1.8 ns max propagation delay at 1.8 V, ±8-mA output drive, and bus-hold inputs eliminating external pull resistors. It serves as a high-density memory address or clock driver in low-voltage server backplanes and FPGA I/O expansion interfaces.

For engineers reviewing the SN74AUCH16244ZQLR datasheet, SN74AUCH16244ZQLR pinout, SN74AUCH16244ZQLR application, or SN74AUCH16244ZQLR equivalent, key selection criteria include sub-2-ns timing at 1.8 V, I_off-enabled partial-power-down support, 3.6-V I/O tolerance for mixed-mode interfacing, and VFBGA-48 (GQL) package compatibility with fine-pitch PCB routing.

Technical Context

This device implements four independent 4-bit buffered channels, each with symmetrical active-low output-enable (OE) control and true (noninverting) logic polarity. Its bus-hold circuitry actively maintains valid logic states on undriven inputs without external components, reducing BOM count and layout complexity.

The SN74AUCH16244ZQLR uses TI's Widebus™ architecture to achieve ultra-low dynamic power (20 µA max I_CC) while supporting 0.8-V to 2.7-V operational range - with guaranteed performance specifically validated at 1.65–1.95 V. I_off protection disables outputs during power-down to prevent backflow current, satisfying JEDEC JESD78 Class II latch-up requirements (>100 mA).

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	0.8 V to 2.7 V; fully specified for 1.65–1.95 V operation in modern low-voltage systems
Max t_pd	1.8 ns at 1.8 V; enables high-speed data path buffering in DDR memory subsystems
Output Drive	±8 mA at 1.8 V; sufficient to drive 2–3 LVTTL loads or one 50-Ω transmission line
I_off	±10 µA max; blocks current flow when powered down, enabling hot-swap and partial-power-down modes
Bus-Hold Current	IBHL up to 20 µA at 1.65 V; holds floating inputs at valid logic levels without external resistors
I/O Tolerance	3.6 V; allows safe interfacing with 3.3-V or 2.5-V peripherals in mixed-voltage domains
ESD Rating	2000-V HBM, 200-V MM, 1000-V CDM; meets industrial-grade robustness requirements

Pinout & Package

VFBGA-48 (GQL) package: 6 × 6 mm body, 0.5-mm pitch, bottom-side ball array, JEDEC MO-153 compliant, 1.2-mm max height.

Pin/Terminal	Circuit Role	Design Meaning
1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4	Data Inputs (4 groups × 4 bits)	True logic inputs per channel; each group independently controlled by corresponding OE
1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4	3-State Outputs (4 groups × 4 bits)	Noninverting buffered outputs; high-impedance when OE = high
1OE, 2OE, 3OE, 4OE	Active-Low Output Enables	Individual channel control; tie to V_CC via pullup for power-up high-Z safety
V_CC, GND	Power Supply Terminals	Eight V_CC and eight GND balls distributed across package for low-inductance decoupling

Key Features

Feature	Design Value
Sub-2-ns propagation delay at 1.8 V	Enables timing-critical buffering in 500+ MHz clock domains without adding setup/hold margin penalties
Integrated bus-hold on all inputs	Eliminates need for 16 external pullup/pulldown resistors, reducing PCB area and assembly cost
I_off partial-power-down protection	Prevents damaging back-current when V_CC is off but I/O lines remain active, critical for modular system hot-swap
3.6-V tolerant I/O	Supports interoperability with legacy 3.3-V logic without level shifters in mixed-supply systems
Latch-up immunity >100 mA	Guarantees robust operation under transient overvoltage or ESD events per JESD78 Class II

Applications

Memory Address Buffering	FPGA I/O Expansion
Use Scenario: Driving address lines from a low-voltage microcontroller to multiple SRAM or Flash devices sharing a common bus. IC Role / Device Role / Timing Role: 16-bit noninverting buffer isolating controller outputs from capacitive bus loading while maintaining signal integrity. Use Value: 1.8 ns t_pd ensures address setup time compliance even at 200-MHz bus rates; bus-hold prevents glitches during address transitions.	Use Scenario: Extending FPGA GPIO count to interface with external ADCs, DACs, and sensors operating at different voltage domains. IC Role / Device Role / Timing Role: Level-translating and fan-out buffer between 1.8-V FPGA I/O banks and 3.3-V peripheral interfaces. Use Value: 3.6-V I/O tolerance allows direct connection to 3.3-V peripherals; I_off enables safe power sequencing during FPGA configuration.
Server Backplane Clock Distribution	Low-Power Industrial Controller Bus
Use Scenario: Distributing synchronized clock signals across multiple daughter cards in a 1U rack-mounted server chassis. IC Role / Device Role / Timing Role: Low-skew, low-jitter clock buffer with 3-state outputs enabling dynamic clock gating per slot. Use Value: Symmetrical t_en/t_dis (2.5 ns typ) supports precise clock enable/disable timing; ±8-mA drive sustains signal integrity over 10-cm FR4 traces.	Use Scenario: Interfacing an ARM Cortex-M7 MCU with multiple SPI peripherals and status LEDs in a battery-powered edge node. IC Role / Device Role / Timing Role: Power-gated I/O expander providing isolated, noise-immune signal paths with minimal quiescent current. Use Value: 20-µA max I_CC extends battery life; bus-hold prevents floating input-induced MCU resets during sensor disconnection.

Memory Address Buffering

FPGA I/O Expansion

Use Scenario: Driving address lines from a low-voltage microcontroller to multiple SRAM or Flash devices sharing a common bus.

IC Role / Device Role / Timing Role: 16-bit noninverting buffer isolating controller outputs from capacitive bus loading while maintaining signal integrity.

Use Value: 1.8 ns t_pd ensures address setup time compliance even at 200-MHz bus rates; bus-hold prevents glitches during address transitions.

Use Scenario: Extending FPGA GPIO count to interface with external ADCs, DACs, and sensors operating at different voltage domains.

IC Role / Device Role / Timing Role: Level-translating and fan-out buffer between 1.8-V FPGA I/O banks and 3.3-V peripheral interfaces.

Use Value: 3.6-V I/O tolerance allows direct connection to 3.3-V peripherals; I_off enables safe power sequencing during FPGA configuration.

Server Backplane Clock Distribution

Low-Power Industrial Controller Bus

Use Scenario: Distributing synchronized clock signals across multiple daughter cards in a 1U rack-mounted server chassis.

IC Role / Device Role / Timing Role: Low-skew, low-jitter clock buffer with 3-state outputs enabling dynamic clock gating per slot.

Use Value: Symmetrical t_en/t_dis (2.5 ns typ) supports precise clock enable/disable timing; ±8-mA drive sustains signal integrity over 10-cm FR4 traces.

Use Scenario: Interfacing an ARM Cortex-M7 MCU with multiple SPI peripherals and status LEDs in a battery-powered edge node.

IC Role / Device Role / Timing Role: Power-gated I/O expander providing isolated, noise-immune signal paths with minimal quiescent current.

Use Value: 20-µA max I_CC extends battery life; bus-hold prevents floating input-induced MCU resets during sensor disconnection.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC16244ADGGR	Higher V_CC min (1.65 V), slower t_pd (3.2 ns @ 3.3 V), no bus-hold	Requires external pull resistors; unsuitable for floating-bus environments	Choose if 3.3-V operation dominates and board space permits discrete biasing
SN74AVC16244DGGR	Wider V_CC range (1.2–3.6 V), faster t_pd (1.5 ns @ 1.8 V), no I_off	Lacks partial-power-down capability; not safe for hot-swap use cases	Prefer when maximum speed is critical and full power cycling is guaranteed

Compared with SN74LVC16244ADGGR and SN74AVC16244DGGR, the SN74AUCH16244ZQLR uniquely combines bus-hold, I_off, and sub-2-ns timing in a single 1.8-V-optimized device - making it the only choice for space-constrained, mixed-voltage, hot-pluggable systems requiring zero external bias components.

Availability

SN74AUCH16244ZQLR is available at Aetrix Electronics and suitable for memory subsystems, FPGA I/O expansion, server clock distribution, and low-power industrial controllers requiring stable component supply across extended product lifecycles.

Supply support for SN74AUCH16244ZQLR 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 connectivity technologies, with decades of expertise in high-reliability logic and interface solutions.

The SN74AUCH16244ZQLR belongs to TI's Widebus™ family - engineered for high-speed, low-voltage bus interface applications in computing, communications, and industrial automation where density, power efficiency, and signal integrity are critical.

FAQ

What is the recommended power-up sequence for SN74AUCH16244ZQLR?

TI specifies that OE pins must be held high (inactive) during power-up to ensure outputs remain in high-impedance state until V_CC stabilizes. For SN74AUCH16244ZQLR, tie each OE to V_CC via a pullup resistor (value determined by driver sink capability); this prevents bus contention during ramp-up. The device's I_off feature further protects against back-current if V_CC drops before I/O signals.

Does SN74AUCH16244ZQLR support 3.3-V I/O signaling?

Yes - SN74AUCH16244ZQLR features 3.6-V tolerant I/O, allowing safe connection to 3.3-V peripherals even when operating at 1.8-V V_CC. Input voltage range is –0.5 V to 3.6 V, and output voltage swing reaches V_CC (1.8 V) with ±8-mA drive strength. No level shifter is required, simplifying mixed-voltage designs.

How does the bus-hold circuit in SN74AUCH16244ZQLR eliminate external resistors?

The SN74AUCH16244ZQLR integrates active bus-hold circuitry on all 16 inputs, sourcing or sinking up to 20 µA (at 1.65 V) to maintain valid logic states when inputs float. This replaces 16 discrete pullup/pulldown resistors, reducing BOM cost, PCB area, and potential noise coupling - confirmed in TI's SCES391E datasheet Section 6.2.

What is the thermal resistance (θ_JA) of SN74AUCH16244ZQLR in its GQL package?

Per TI's SCES391E datasheet Absolute Maximum Ratings table, the VFBGA-48 (GQL) package of SN74AUCH16244ZQLR has a junction-to-ambient thermal resistance (θ_JA) of 42°C/W. This value assumes standard JEDEC 2-layer board conditions and enables reliable operation up to 85°C ambient with typical 20-µA I_CC and moderate output loading.

Can SN74AUCH16244ZQLR be used in partial-power-down applications?

Yes - SN74AUCH16244ZQLR explicitly supports partial-power-down via its I_off circuitry, which disables outputs and limits leakage to ±10 µA when V_CC = 0 V but I/O pins remain biased. This meets JEDEC JESD78 Class II latch-up immunity (>100 mA) and is validated for hot-swap and modular power architectures per datasheet Section 6.3.

SN74AUCH16244ZQLR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74AUCH

Package/Case:: 56-VFBGA

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 4

Number of Bits per Element:: 4

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 9mA, 9mA

Voltage - Supply:: 0.8V ~ 2.7V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 56-BGA Microstar Junior (7x4.5)

SN74AUCH16244ZQLR FAQ

1.How can I place an order for SN74AUCH16244ZQLR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74AUCH16244ZQLR 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 SN74AUCH16244ZQLR reliable?

The price and inventory of SN74AUCH16244ZQLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AUCH16244ZQLR is usually 5 days.

3.What payment methods are accepted for SN74AUCH16244ZQLR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AUCH16244ZQLR transactions.

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4.How is shipping managed for SN74AUCH16244ZQLR?

SN74AUCH16244ZQLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74AUCH16244ZQLR 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 SN74AUCH16244ZQLR?

For technical support, including SN74AUCH16244ZQLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AUCH16244ZQLR requirements.

6.How does Aetrix verify that SN74AUCH16244ZQLR is sourced from the original manufacturer or authorized distributors?

All SN74AUCH16244ZQLR 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 SN74AUCH16244ZQLR meets industry standards.

7.What is the process for return or replacement of SN74AUCH16244ZQLR?

All SN74AUCH16244ZQLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AUCH16244ZQLR, 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 SN74AUCH16244ZQLR part is unused and in its original packaging.

Return procedure for SN74AUCH16244ZQLR:

1.Submit a request within 90 days.

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

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