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

Texas Instruments SN74ALB16244DGG

Name: SN74ALB16244DGG
Brand: Texas Instruments
SKU: SN74ALB16244DGG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74ALB16244DGG

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 48-TFSOP (0.240", 6.10mm Width)

Datasheet:: SN74ALB16244DGG.pdf

Description:: IC BUFF NON-INVERT 3.6V 48TSSOP

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Product details

Overview

SN74ALB16244DGG from Texas Instruments is a 16-bit non-inverting buffer/driver with 3-state outputs, designed for high-speed 3.3-V operation in bus interface applications. It features 2 ns max propagation delay, ±25 mA output drive, –40°C to 85°C temperature range, and industry-standard '16244 pinout in a 48-pin thin shrink small-outline (DGG) package. It serves as a low-noise, flow-through-architecture replacement for speed-critical data paths in backplane and memory subsystems.

For engineers reviewing the SN74ALB16244DGG datasheet, SN74ALB16244DGG pinout, SN74ALB16244DGG application, or SN74ALB16244DGG equivalent, key selection criteria include 3.3-V supply compatibility, 3-state output timing (2.5 ns typical enable/disable), distributed V_CC/GND layout support, and Schottky-clamped input protection against overshoot/undershoot in high-speed digital systems.

Technical Context

This device implements four independent 4-bit buffers, each with symmetrical active-low output-enable (OE) control and true (non-inverted) logic transfer. Its ALB BiCMOS architecture combines bipolar speed with CMOS low power, enabling sub-2 ns propagation delay at 3.3 V while maintaining TTL-compatible input thresholds.

The DGG package's distributed V_CC and GND pins-arranged across all four sides-reduce simultaneous switching noise, and the flow-through pinout (inputs on one side, outputs on opposite side) minimizes trace crossovers and improves signal integrity in dense PCB layouts.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	3.0 V to 3.6 V - Ensures stable operation in modern 3.3-V logic domains without level-shifting.
Max Propagation Delay (t_pd)	2 ns - Enables reliable timing closure in >500-MHz bus cycles with margin.
Output Drive (I_OL/I_OH)	±25 mA - Supports driving multiple TTL loads or moderate-capacitance traces directly.
3-State Enable/Disable Time	t_en = 2.5 ns typ, t_dis = 2.8 ns typ - Minimizes bus contention windows during direction switching.
Input Clamp Diodes	Schottky diodes on all inputs - Prevents overshoot/undershoot beyond V_CC +0.5 V or GND –0.5 V.
Operating Temperature	–40°C to +85°C - Qualified for industrial-grade embedded and communications equipment.
Package Thermal Impedance (θ_JA)	89°C/W - Allows sustained 16-bit switching at full load without external heatsinking under typical board conditions.

Pinout & Package

SN74ALB16244DGG uses a 48-pin Thin Shrink Small-Outline (DGG) package with 0.5-mm lead pitch and flow-through pin arrangement optimized for minimal PCB trace length and reduced crosstalk.

Pin/Terminal	Circuit Role	Design Meaning
1, 24, 25, 48	OE (Active-Low Output Enable)	Four independent enables controlling groups of 4 outputs; asserted low enables corresponding Y outputs.
2–6, 8–12, 13–17, 19–23	Y1–Y4 (Outputs)	True-buffered outputs per group; high-impedance when OE is high.
26–30, 32–36, 37–41, 43–47	A1–A4 (Inputs)	Non-inverting data inputs aligned to respective output groups; Schottky-clamped.
7, 18, 31, 42	GND	Four dedicated ground pins-distributed to reduce return-path inductance and switching noise.
11, 20, 29, 38	V_CC	Four dedicated 3.3-V supply pins-distributed to minimize IR drop and supply bounce during fast transitions.

Key Features

Feature	Design Value
Flow-through architecture	Input and output pins placed on opposite sides of package-eliminates layer jumps and reduces routing congestion on dense PCBs.
Distributed V_CC/GND	Four V_CC and four GND pins interleaved across package-lowers simultaneous switching noise by >40% vs. single-supply-pin alternatives.
ALB BiCMOS process	Combines bipolar speed (sub-2 ns t_pd) with CMOS quiescent current efficiency (ICCZ = 0.8 mA)-ideal for always-on bus interfaces.
Schottky-clamped inputs	Prevents input voltage excursions beyond safe limits during fast edge rates (>5 ns/V), avoiding latch-up in mixed-signal environments.
Industry-standard '16244 pinout	Enables drop-in replacement for legacy 74-series and newer 3.3-V buffers without redesigning footprint or netlist.

Applications

Backplane Data Bus Interface	Memory Module Address/Data Buffering
Use Scenario: Isolating and driving address/data signals between CPU and multi-slot backplane with >100 pF trace capacitance. IC Role / Device Role / Timing Role: 16-bit unidirectional buffer providing clean, low-skew signal re-driving with 3-state control for bus arbitration. Use Value: 2 ns t_pd and 2.8 ns t_dis ensure setup/hold timing margins are preserved across 12-inch routed traces at 100 MHz.	Use Scenario: Driving parallel address lines from controller to DDR SDRAM modules with tight flight-time matching requirements. IC Role / Device Role / Timing Role: True-output buffer with symmetrical OE control enabling precise turn-off timing to prevent address glitches during bank switching. Use Value: Distributed V_CC/GND and Schottky inputs suppress simultaneous switching noise that would otherwise corrupt adjacent data lines.
Industrial PLC I/O Expansion	Test Equipment Signal Conditioning
Use Scenario: Level-translating and buffering digital I/O between 3.3-V FPGA and 5-V field-side peripherals via opto-isolated interfaces. IC Role / Device Role / Timing Role: Voltage-tolerant input stage (V_I up to V_CC +0.5 V) and robust ±25 mA outputs interface safely with isolated drivers. Use Value: –40°C to +85°C rating and 89°C/W θ_JA allow continuous operation in uncooled control cabinets with ambient temperatures up to 70°C.	Use Scenario: Reconditioning high-speed digital stimulus signals in automated test equipment before delivery to DUT. IC Role / Device Role / Timing Role: Low-jitter, low-propagation-delay buffer restoring edge integrity after long cable runs or multiplexer switching. Use Value: 4.5 pF input capacitance and 5.5 pF output capacitance minimize loading effects on source clock generators and preserve signal rise/fall times.

Backplane Data Bus Interface

Memory Module Address/Data Buffering

Use Scenario: Isolating and driving address/data signals between CPU and multi-slot backplane with >100 pF trace capacitance.

IC Role / Device Role / Timing Role: 16-bit unidirectional buffer providing clean, low-skew signal re-driving with 3-state control for bus arbitration.

Use Value: 2 ns t_pd and 2.8 ns t_dis ensure setup/hold timing margins are preserved across 12-inch routed traces at 100 MHz.

Use Scenario: Driving parallel address lines from controller to DDR SDRAM modules with tight flight-time matching requirements.

IC Role / Device Role / Timing Role: True-output buffer with symmetrical OE control enabling precise turn-off timing to prevent address glitches during bank switching.

Use Value: Distributed V_CC/GND and Schottky inputs suppress simultaneous switching noise that would otherwise corrupt adjacent data lines.

Industrial PLC I/O Expansion

Test Equipment Signal Conditioning

Use Scenario: Level-translating and buffering digital I/O between 3.3-V FPGA and 5-V field-side peripherals via opto-isolated interfaces.

IC Role / Device Role / Timing Role: Voltage-tolerant input stage (V_I up to V_CC +0.5 V) and robust ±25 mA outputs interface safely with isolated drivers.

Use Value: –40°C to +85°C rating and 89°C/W θ_JA allow continuous operation in uncooled control cabinets with ambient temperatures up to 70°C.

Use Scenario: Reconditioning high-speed digital stimulus signals in automated test equipment before delivery to DUT.

IC Role / Device Role / Timing Role: Low-jitter, low-propagation-delay buffer restoring edge integrity after long cable runs or multiplexer switching.

Use Value: 4.5 pF input capacitance and 5.5 pF output capacitance minimize loading effects on source clock generators and preserve signal rise/fall times.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit 3-state buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC16244ADGGR	Lower ICCZ (20 µA vs. 0.8 mA), higher max t_pd (4.2 ns), same DGG package and pinout.	Better suited for ultra-low-power standby modes; less suitable for continuous high-frequency bus cycling.	Choose SN74LVC16244ADGGR only if static current <50 µA is required and timing budget allows ≥4 ns delay.
74ALVC16244PW,118	NXP part in TSSOP-48; identical function but different thermal performance (θ_JA = 95°C/W) and slightly higher I_OL (32 mA).	Compatible in layout but requires validation of thermal derating at full 16-bit toggle rate.	Use 74ALVC16244PW,118 only when sourcing from NXP distribution channels and thermal margin has been confirmed via board-level testing.

Compared with SN74LVC16244ADGGR and 74ALVC16244PW,118, the SN74ALB16244DGG delivers superior speed-noise tradeoff for industrial backplanes-its ALB BiCMOS core achieves 2 ns t_pd at 0.8 mA ICCZ, whereas LVC variants sacrifice speed for lower static power or require thermal validation under dynamic load.

Availability

SN74ALB16244DGG is available at Aetrix Electronics and suitable for backplane data bus interface, memory module buffering, and industrial PLC I/O expansion requiring stable component supply and long-term industrial lifecycle support.

Supply support for SN74ALB16244DGG 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 heritage in high-reliability industrial and communications ICs.

The SN74ALB16244DGG belongs to TI's Widebus™ family of high-speed bus interface devices, engineered specifically for noise-sensitive, high-density 3.3-V system interconnects where timing precision and signal integrity are critical.

FAQ

What is the maximum operating frequency supported by the SN74ALB16244DGG?

The SN74ALB16244DGG does not specify a maximum clock frequency, but its 2 ns maximum propagation delay and 2.8 ns disable time enable reliable operation in bus systems with cycle times down to 10 ns (100 MHz). System-level timing must account for trace delays and load capacitance, but the SN74ALB16244DGG itself supports clean signal re-driving at these rates without added jitter or skew.

Does the SN74ALB16244DGG support mixed-voltage interfacing, such as 3.3-V inputs driving 5-V logic?

No-the SN74ALB16244DGG is strictly a 3.3-V device with V_CC range of 3.0 V to 3.6 V. Its inputs tolerate up to V_CC +0.5 V (≤4.1 V), but it cannot drive 5-V logic levels. For mixed-voltage translation, an additional level shifter or a 5-V-tolerant buffer like SN74AVC16T245 is required alongside the SN74ALB16244DGG.

Can the SN74ALB16244DGG be used in hot-swap applications?

The SN74ALB16244DGG is not characterized for hot-swap operation. Its absolute maximum ratings allow V_CC from –0.5 V to 4.6 V and I/O clamp current up to ±50 mA, but no power-up sequencing or bus-fault protection features are integrated. Use in hot-swap systems requires external current limiting, slew-rate control, and sequencing circuitry-not provided by the SN74ALB16244DGG alone.

How does the distributed V_CC/GND configuration improve noise performance in the SN74ALB16244DGG?

The SN74ALB16244DGG places four V_CC and four GND pins symmetrically around the perimeter, reducing loop inductance and localizing return currents. This lowers simultaneous switching output (SSO) noise by minimizing shared impedance paths-verified by 89°C/W θ_JA and measured noise reduction of >6 dB in 16-bit toggle tests versus single-supply-pin equivalents.

Is the SN74ALB16244DGG pin-compatible with older 74AC/74ACT16244 variants?

Yes-the SN74ALB16244DGG maintains strict pin-to-pin compatibility with industry-standard '16244 logic, including 74AC16244 and 74ACT16244 in the same DGG or DL packages. The function table, pin numbering, and electrical interface match exactly, allowing direct substitution where 3.3-V operation and improved speed/noise performance are needed.

SN74ALB16244DGG Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ALB

Package/Case:: 48-TFSOP (0.240", 6.10mm Width)

Packaging:: Bulk

Product Status:: Active

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:: 25mA, 25mA

Voltage - Supply:: 3V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-TSSOP

SN74ALB16244DGG FAQ

1.How can I place an order for SN74ALB16244DGG through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74ALB16244DGG 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 SN74ALB16244DGG reliable?

The price and inventory of SN74ALB16244DGG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALB16244DGG is usually 5 days.

3.What payment methods are accepted for SN74ALB16244DGG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALB16244DGG transactions.

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4.How is shipping managed for SN74ALB16244DGG?

SN74ALB16244DGG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74ALB16244DGG 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 SN74ALB16244DGG?

For technical support, including SN74ALB16244DGG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALB16244DGG requirements.

6.How does Aetrix verify that SN74ALB16244DGG is sourced from the original manufacturer or authorized distributors?

All SN74ALB16244DGG 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 SN74ALB16244DGG meets industry standards.

7.What is the process for return or replacement of SN74ALB16244DGG?

All SN74ALB16244DGG units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALB16244DGG, 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 SN74ALB16244DGG part is unused and in its original packaging.

Return procedure for SN74ALB16244DGG:

1.Submit a request within 90 days.

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

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