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

STMicroelectronics 74ACT16244TTR

Name: 74ACT16244TTR
Brand: STMicroelectronics
SKU: 74ACT16244TTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74ACT16244TTR

Manufacturer:: STMicroelectronics

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: 74ACT16244TTR.pdf

Description:: IC BUFF NON-INVERT 5.5V 48TSSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

74ACT16244TTR from STMicroelectronics is a 16-bit non-inverting bus buffer with 3-state outputs, designed for high-speed address/data bus interfacing in TTL- and CMOS-compatible systems. It delivers 4.8 ns typical propagation delay at 5 V, ±24 mA symmetrical output drive, and operates across 4.5–5.5 V with 8 µA max quiescent current. Used in memory address drivers, clock distribution, and bus transceivers.

For engineers reviewing the 74ACT16244TTR datasheet, 74ACT16244TTR pinout, 74ACT16244TTR application, or 74ACT16244TTR equivalent, key selection criteria include 3-state enable control granularity (four independent groups), 50 Ω transmission line driving capability, ESD immunity (2 kV), and compatibility with TTL input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V).

Technical Context

This device implements four independent 4-bit non-inverting 3-state buffers, each controlled by a dedicated output-enable input (1G–4G). All inputs accept TTL-level signals, and outputs drive 50 Ω transmission lines with matched |IOH| = |IOL| = 24 mA (min) under load.

It features sub-micron C2MOS fabrication, double-layer metal interconnect, and integrated 2 kV HBM ESD protection on all I/O pins. Operating temperature spans –55 °C to +125 °C, supporting industrial and automotive-adjacent embedded control applications.

Key Specifications

Parameter	Value and Actual Design Meaning
tPD (typ)	4.8 ns at VCC = 5 V - enables sub-5 ns timing-critical bus buffering in high-speed digital systems
VCC Range	4.5 V to 5.5 V - ensures robust operation across noisy 5 V supply rails
IOL / IOH (min)	24 mA - drives 50 Ω transmission lines directly without external termination
ICC (max)	8 µA at TA = 25 °C - supports ultra-low static power in always-on logic interfaces
VIH / VIL	2.0 V (min) / 0.8 V (max) - guarantees reliable interfacing with standard TTL outputs
ESD Rating	2 kV HBM - protects against handling-induced electrostatic discharge during assembly
Operating Temp	–55 °C to +125 °C - qualified for extended industrial and under-hood environments

Pinout & Package

TSSOP-48 package: 48-pin thin shrink small outline package with 0.5 mm pitch, 12.6 mm × 8.1 mm body, and exposed pad not present. Designed for surface-mount reflow assembly and high-density PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
1, 24, 25, 48	1G, 4G, 3G, 2G	Independent 3-state enable inputs for four 4-bit buffer sections
2–3, 5–6, 8–9, 11–12, 13–14, 16–17, 19–20, 22–23	1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4	Non-inverting buffered outputs (16 total)
26–27, 29–30, 32–33, 35–36, 37–38, 40–41, 43–44, 46–47	1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4	Non-inverting data inputs (16 total)
4, 10, 15, 21, 28, 34, 39, 45	GND	Eight ground connections - reduce switching noise and improve signal integrity
7, 18, 31, 42	VCC	Four power supply pins - lower impedance path for dynamic current demands

Key Features

Feature	Design Value
Four independent 3-state controls	Enables selective isolation of four 4-bit bus segments without global disable
Symmetrical ±24 mA drive	Eliminates need for external pull-up/down resistors on bidirectional traces
50 Ω transmission line support	Permits direct connection to controlled-impedance PCB traces without series termination
2 kV HBM ESD protection	Reduces risk of field failure during board handling and system integration
Wide temperature range	Supports deployment in unregulated enclosures and thermally demanding subsystems

Applications

Memory Address Buffering

Clock Distribution Network

Use Scenario: Driving address lines from a microcontroller to multiple SRAM or Flash devices on a shared bus.

IC Role / Device Role / Timing Role: Non-inverting 3-state buffer isolating address bus segments during chip select transitions.

Use Value: 4.8 ns tPD ensures setup/hold timing margins are preserved across 16-bit parallel address paths.

Use Scenario: Fan-out of a system clock to multiple synchronous peripherals (e.g., ADCs, DACs, FPGAs).

IC Role / Device Role / Timing Role: Low-skew, high-drive buffer replicating clock edges with matched rise/fall characteristics.

Use Value: ±24 mA drive sustains signal integrity over 50 Ω traces up to 15 cm without waveform degradation.

Industrial Bus Transceiver Interface

Legacy System Logic Translation

Use Scenario: Interfacing a modern 5 V CMOS controller with legacy ISA or PCI-like parallel control buses.

IC Role / Device Role / Timing Role: Bidirectional bus driver enabling clean direction control via per-group G inputs.

Use Value: TTL-compatible VIH/VIL thresholds ensure reliable recognition of older peripheral status signals.

Use Scenario: Replacing obsolete 74F/74AS logic in repair or life-extension programs for avionics test equipment.

IC Role / Device Role / Timing Role: Pin- and function-compatible drop-in replacement with improved power efficiency and ESD robustness.

Use Value: 8 µA ICC reduces standby power by >90% versus original 74F244, extending thermal margin in sealed chassis.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74ACT16244DGGR	Same logic function and AC specs; TSSOP-48 package with identical pinout; TI-manufactured	No functional difference - validated for same bus buffering roles and thermal profiles	Select when dual-sourcing or TI-aligned BOM requirements apply
74LVC16244APAG	Lower VCC range (1.65–3.6 V); 24 mA drive only at 3.3 V; no 5 V tolerance	Not suitable for 5 V legacy systems; requires level-shifting if interfacing with TTL	Prefer only in new 3.3 V designs where voltage scaling and lower power are primary goals

Compared with SN74ACT16244DGGR, the 74ACT16244TTR offers identical performance but differs in manufacturer qualification and traceability; versus 74LVC16244APAG, it provides full 5 V operation and TTL compatibility - critical for backward integration.

Availability

74ACT16244TTR is available at Aetrix Electronics and suitable for memory address buffering, clock distribution networks, industrial bus transceiver interfaces, and legacy system logic translation requiring stable component supply and long-term obsolescence management.

Supply support for 74ACT16244TTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, specializing in automotive, industrial, and power management ICs, with broad analog, digital, and mixed-signal product portfolios.

The 74ACT logic family targets high-speed, low-power 5 V digital interface applications - specifically engineered for interoperability between TTL, CMOS, and NMOS systems while maintaining industrial-grade reliability.

FAQ

Is 74ACT16244TTR compatible with 3.3 V logic inputs?

No - its input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) are specified for 5 V operation only. While 3.3 V logic may register as valid HIGH in some cases, STMicroelectronics does not guarantee functionality below VCC = 4.5 V, and DC input voltage must remain within 0 to VCC. Use level translators for mixed-voltage interfacing.

How many independent output-enable controls does this device have?

The 74ACT16244TTR has four independent output-enable inputs: 1G (pin 1), 2G (pin 48), 3G (pin 25), and 4G (pin 24). Each controls a separate 4-bit buffer group (1Y–4Y), allowing granular bus segment isolation without disabling the entire 16-bit path.

What is the maximum capacitive load this buffer can drive reliably?

AC specifications (tPLH/tPHL, tPZL/tPHZ) are characterized at CL = 50 pF. While higher loads may be driven, propagation delay increases linearly with capacitance; for loads >75 pF, signal integrity verification (ringing, rise time) is required. Output drive strength remains rated at ±24 mA up to VOH/VOL limits.

Does this part support hot insertion or live insertion into a powered backplane?

No - the 74ACT16244TTR lacks explicit hot-swap or power-sequence immunity features. Its absolute maximum ratings do not cover partial power application, and IOK/IIK limits (±20 mA) indicate vulnerability to bus contention during insertion. Use dedicated hot-swap controllers or sequenced power design for such applications.

74ACT16244TTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: 74ACT

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

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:: 24mA, 24mA

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: -55°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-TSSOP

74ACT16244TTR FAQ

1.How can I place an order for 74ACT16244TTR through Aetrix?

Please submit a Request for Quotation (RFQ) for 74ACT16244TTR 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 74ACT16244TTR reliable?

The price and inventory of 74ACT16244TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT16244TTR is usually 5 days.

3.What payment methods are accepted for 74ACT16244TTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT16244TTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74ACT16244TTR?

74ACT16244TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74ACT16244TTR 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 74ACT16244TTR?

For technical support, including 74ACT16244TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT16244TTR requirements.

6.How does Aetrix verify that 74ACT16244TTR is sourced from the original manufacturer or authorized distributors?

All 74ACT16244TTR 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 74ACT16244TTR meets industry standards.

7.What is the process for return or replacement of 74ACT16244TTR?

All 74ACT16244TTR units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT16244TTR, 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 74ACT16244TTR part is unused and in its original packaging.

Return procedure for 74ACT16244TTR:

1.Submit a request within 90 days.

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

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