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

Texas Instruments SN74AUCH32244GKER

Name: SN74AUCH32244GKER
Brand: Texas Instruments
SKU: SN74AUCH32244GKER
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74AUCH32244GKER

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 96-LFBGA

Datasheet:: SN74AUCH32244GKER.pdf

Description:: IC BUF NON-INVERT 2.7V 96LFBGA

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Product details

Overview

SN74AUCH32244GKER from Texas Instruments is a 32-bit noninverting buffer/driver with 3-state outputs, designed for 1.65-V to 1.95-V V_CC operation and 3.6-V I/O tolerant signaling. It delivers ±8-mA output drive at 1.8 V, achieves 1.8-ns max propagation delay (t_pd) at 1.8 V, and features bus-hold circuitry on all data inputs-enabling direct interface with low-voltage memory address buses and clock distribution networks in high-density embedded systems.

For engineers reviewing the SN74AUCH32244GKER datasheet, SN74AUCH32244GKER pinout, SN74AUCH32244GKER application, or SN74AUCH32244GKER 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 voltage domains, and integrated bus-hold eliminating external biasing resistors in space-constrained PCB layouts.

Technical Context

This device implements eight independent 4-bit buffer sections, each with symmetrical active-low output-enable (OE) inputs and true (noninverting) outputs. All 32 outputs enter high-impedance state when any OE is high, supporting bidirectional bus contention management in memory subsystems and FPGA I/O expansion.

Its bus-hold circuitry actively maintains valid logic states on undriven inputs without external components, while the I_off feature disables outputs and blocks current backflow during power sequencing-critical for hot-swap and multi-rail power domain isolation in industrial controllers and telecom line cards.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Operating Range	0.8 V to 2.7 V; optimized for stable 1.65–1.95 V operation in modern low-voltage SoC interfaces
Max t_pd	1.8 ns at 1.8 V; enables sub-500-MHz data path timing margins in high-speed address/data buffering
I/O Voltage Tolerance	3.6 V; allows safe interfacing with legacy 3.3-V peripherals while powered from 1.8-V rails
Output Drive	±8 mA at 1.8 V; sufficient to drive 50-Ω transmission lines or fan-out to ≥10 LVTTL loads
I_off Current	±10 µA max; prevents damaging back-current during partial power-down in multi-voltage systems
Bus-Hold Input Current	±20 µA min sustaining current; eliminates need for external pullup/pulldown resistors on unused inputs
ICC (Max)	40 µA; ultra-low static power supports always-on buffer functions in battery-backed subsystems

Pinout & Package

LFBGA-96 package (GKE), 6.0 mm × 6.0 mm, 0.5-mm pitch, bottom-side thermal pad, JEDEC MO-220 compliant.

Pin/Terminal	Circuit Role	Design Meaning
1A1–1A4, 2A1–2A4, ..., 8A1–8A4 (64 pins)	Data Inputs	Eight groups of four inputs per buffer section; each group drives corresponding Y outputs
1Y1–1Y4, 2Y1–2Y4, ..., 8Y1–8Y4 (64 pins)	True Outputs	Noninverting buffered outputs; all enter high-Z when associated OE is high
1OE–8OE (8 pins)	Active-Low Output Enable	Independent control per 4-bit section; OE high forces Y outputs to high-impedance state
V_CC (16 pins)	Power Supply	Distributed supply connections across package; requires local 100-nF decoupling per V_CC bank
GND (24 pins)	Ground Reference	Multiple ground terminals minimize switching noise and improve signal integrity in 32-bit paths

Key Features

Feature	Design Value
3.6-V I/O Tolerance	Enables interoperability between 1.8-V core logic and 3.3-V peripheral buses without level shifters
Integrated Bus-Hold	Prevents floating inputs in unpopulated or dynamically reconfigured memory slots-reducing BOM count by up to 64 resistors
I_off Partial-Power-Down	Allows safe shutdown of individual buffer sections while other system rails remain active, meeting JESD78 Class II latch-up immunity
Sub-2-ns Propagation Delay	Supports tight setup/hold timing in DDR memory address latching and high-frequency clock fanout applications
Low ICC (40 µA Max)	Reduces quiescent power in always-on buffer stages used for wake-up signal conditioning or standby bus monitoring

Applications

Memory Address Buffering	FPGA I/O Expansion
Use Scenario: Driving 32-bit address lines from a low-voltage microcontroller to multiple SRAM or Flash devices sharing a common data bus. IC Role / Device Role / Timing Role: Noninverting 3-state buffer providing level translation, fanout amplification, and bus contention isolation. Use Value: Eliminates external pullups via bus-hold, ensures <1.8-ns address propagation for ≤500-MHz memory access cycles, and tolerates 3.3-V Flash I/O voltages while operating at 1.8 V.	Use Scenario: Extending limited FPGA GPIO count to interface with off-chip peripherals including ADCs, DACs, and sensor arrays. IC Role / Device Role / Timing Role: Bidirectional buffer enabling controlled data flow between FPGA and external devices using OE-gated 3-state control. Use Value: Provides ±8-mA drive strength per pin to meet setup/hold requirements of parallel ADC interfaces, and I_off protection prevents backfeed during FPGA configuration reset sequences.
Low-Voltage Clock Distribution	Industrial Control Backplane Interface
Use Scenario: Fanout of a 1.8-V system clock to multiple timing-critical modules such as PLLs, ADCs, and digital isolators. IC Role / Device Role / Timing Role: Low-skew, low-jitter buffer with matched trace-length routing capability across 32 outputs. Use Value: Achieves 1.8-ns t_pd consistency across all outputs, minimizing clock skew in synchronous sampling systems, and supports 3.6-V tolerant inputs for compatibility with legacy clock sources.	Use Scenario: Interfacing a 1.8-V processor module to a 3.3-V industrial backplane carrying Modbus RTU or CAN signals via discrete transceivers. IC Role / Device Role / Timing Role: Voltage-level translating buffer isolating processor I/O from noisy backplane transients. Use Value: Withstands 3.6-V I/O faults and ESD events (2000-V HBM), provides latch-up immunity >100 mA, and maintains valid logic states on open backplane lines via bus-hold.

Memory Address Buffering

FPGA I/O Expansion

Use Scenario: Driving 32-bit address lines from a low-voltage microcontroller to multiple SRAM or Flash devices sharing a common data bus.

IC Role / Device Role / Timing Role: Noninverting 3-state buffer providing level translation, fanout amplification, and bus contention isolation.

Use Value: Eliminates external pullups via bus-hold, ensures <1.8-ns address propagation for ≤500-MHz memory access cycles, and tolerates 3.3-V Flash I/O voltages while operating at 1.8 V.

Use Scenario: Extending limited FPGA GPIO count to interface with off-chip peripherals including ADCs, DACs, and sensor arrays.

IC Role / Device Role / Timing Role: Bidirectional buffer enabling controlled data flow between FPGA and external devices using OE-gated 3-state control.

Use Value: Provides ±8-mA drive strength per pin to meet setup/hold requirements of parallel ADC interfaces, and I_off protection prevents backfeed during FPGA configuration reset sequences.

Low-Voltage Clock Distribution

Industrial Control Backplane Interface

Use Scenario: Fanout of a 1.8-V system clock to multiple timing-critical modules such as PLLs, ADCs, and digital isolators.

IC Role / Device Role / Timing Role: Low-skew, low-jitter buffer with matched trace-length routing capability across 32 outputs.

Use Value: Achieves 1.8-ns t_pd consistency across all outputs, minimizing clock skew in synchronous sampling systems, and supports 3.6-V tolerant inputs for compatibility with legacy clock sources.

Use Scenario: Interfacing a 1.8-V processor module to a 3.3-V industrial backplane carrying Modbus RTU or CAN signals via discrete transceivers.

IC Role / Device Role / Timing Role: Voltage-level translating buffer isolating processor I/O from noisy backplane transients.

Use Value: Withstands 3.6-V I/O faults and ESD events (2000-V HBM), provides latch-up immunity >100 mA, and maintains valid logic states on open backplane lines via bus-hold.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit buffer/driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74AVC32244ZKER	Higher speed (1.2-ns t_pd at 1.8 V), lower V_CC min (0.65 V), but no bus-hold circuitry	Requires external pullup/pulldown resistors on unused inputs; better suited for fully driven, high-speed test environments	Select when absolute minimum propagation delay is critical and board layout allows discrete biasing components
SN74LVC32244PAG	3.3-V nominal operation (1.65–3.6 V), higher drive (±24 mA), no I_off or bus-hold	Not suitable for partial-power-down systems; lacks 1.8-V optimization and mixed-voltage robustness	Select only for legacy 3.3-V-only designs where 1.8-V operation and I_off are not required

Compared with SN74AVC32244ZKER and SN74LVC32244PAG, the SN74AUCH32244GKER uniquely balances 1.8-V optimization, integrated bus-hold, and I_off protection-making it the only choice for space-constrained, multi-rail industrial controllers requiring zero external biasing and safe power sequencing.

Availability

SN74AUCH32244GKER is available at Aetrix Electronics and suitable for memory subsystem buffering, FPGA I/O expansion, low-voltage clock distribution, and industrial backplane interface applications requiring stable component supply across extended product lifecycles.

Supply support for SN74AUCH32244GKER 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 company delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The SN74AUCH32244GKER belongs to TI's Widebus+™ family of high-speed, low-voltage logic devices engineered specifically for dense, power-sensitive memory and bus interface applications in portable and embedded systems.

FAQ

What is the recommended V_CC range for reliable operation of the SN74AUCH32244GKER?

The SN74AUCH32244GKER is designed specifically for 1.65-V to 1.95-V V_CC operation, though it remains functional from 0.8 V to 2.7 V. Operating within the 1.65–1.95 V window ensures guaranteed timing performance (including 1.8-ns max t_pd), full ±8-mA output drive, and optimal bus-hold functionality. Outside this range, parameters like VOL and VOH may degrade, and bus-hold sustaining current is not assured.

Does the SN74AUCH32244GKER support hot-swap or partial-power-down configurations?

Yes, the SN74AUCH32244GKER supports partial-power-down via its I_off circuitry, which disables outputs and limits current backflow to ±10 µA when V_CC = 0 V and input/output voltages reach up to 2.7 V. This meets JESD78 Class II latch-up immunity and enables safe insertion/removal in live backplanes-provided OE pins are held high during power-off to maintain high-impedance outputs.

How does the bus-hold feature on the SN74AUCH32244GKER eliminate external resistors?

The SN74AUCH32244GKER integrates active bus-hold circuitry on all 64 data inputs (A1–A4 per section), which sources or sinks ≥20 µA to maintain valid logic states when inputs float. This obviates the need for external pullup/pulldown resistors-reducing BOM cost, PCB area, and potential signal integrity issues caused by resistor parasitics in high-speed 32-bit traces.

Can the SN74AUCH32244GKER interface directly with 3.3-V devices?

Yes, the SN74AUCH32244GKER features 3.6-V I/O tolerance on all inputs and outputs, allowing direct connection to 3.3-V peripherals-even while operating from a 1.8-V V_CC. This eliminates level-shifter ICs in mixed-voltage systems, provided output loading stays within ±8-mA drive capability at 1.8 V and input thresholds comply with 3.3-V logic levels (VIH ≥ 2.0 V, VIL ≤ 0.8 V).

What is the pin compatibility status of the SN74AUCH32244GKER with other Widebus+™ 32-bit buffers?

The SN74AUCH32244GKER shares identical LFBGA-96 (GKE) package dimensions and pinout with SN74AVC32244ZKER and SN74LVC32244PAG, but functional differences exist: SN74AVC32244ZKER lacks bus-hold, and SN74LVC32244PAG requires 3.3-V operation and has no I_off. Thus, while PCB layout is reusable, firmware and system-level power sequencing must be validated per device-specific electrical behavior.

SN74AUCH32244GKER Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74AUCH

Package/Case:: 96-LFBGA

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 8

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:: 96-LFBGA (13.5x5.5)

SN74AUCH32244GKER FAQ

1.How can I place an order for SN74AUCH32244GKER through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74AUCH32244GKER 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 SN74AUCH32244GKER reliable?

The price and inventory of SN74AUCH32244GKER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AUCH32244GKER is usually 5 days.

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SN74AUCH32244GKER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74AUCH32244GKER 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 SN74AUCH32244GKER?

For technical support, including SN74AUCH32244GKER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AUCH32244GKER requirements.

6.How does Aetrix verify that SN74AUCH32244GKER is sourced from the original manufacturer or authorized distributors?

All SN74AUCH32244GKER 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 SN74AUCH32244GKER meets industry standards.

7.What is the process for return or replacement of SN74AUCH32244GKER?

All SN74AUCH32244GKER units undergo pre-shipment inspection (PSI). If there is an issue with SN74AUCH32244GKER, 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 SN74AUCH32244GKER part is unused and in its original packaging.

Return procedure for SN74AUCH32244GKER:

1.Submit a request within 90 days.

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

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