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

STMicroelectronics 74VHCT16244ATTR

Name: 74VHCT16244ATTR
Brand: STMicroelectronics
SKU: 74VHCT16244ATTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74VHCT16244ATTR

Manufacturer:: STMicroelectronics

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: 74VHCT16244ATTR.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

74VHCT16244ATTR from STMicroelectronics is a 16-bit non-inverting bus buffer with 3-state outputs, designed for high-speed memory address/data bus driving in 5V TTL-compatible systems. It features 5.4 ns typical propagation delay (VCC = 5V), ±8 mA symmetrical output drive, 4 µA max quiescent ICC at 25°C, and operates across 4.5–5.5 V. Used in industrial control backplanes and legacy microprocessor I/O expansion.

For engineers reviewing the 74VHCT16244ATTR datasheet, 74VHCT16244ATTR pinout, 74VHCT16244ATTR application, or 74VHCT16244ATTR equivalent, key selection criteria include 3-state enable timing (tPLZ/tPZL ≤ 13.0 ns), input overvoltage tolerance (0–7 V independent of VCC), ESD immunity (2 kV HBM), and TSSOP-48 package compatibility with 5V-to-3V interface bridging.

Technical Context

This device implements four independent 4-bit non-inverting buffers, each controlled by a dedicated active-low output enable (nG) input. All inputs accept 0–7 V regardless of VCC, enabling robust level-shifting and power-down protection without external clamping.

It uses sub-micron C2MOS technology to achieve balanced tPLH ≅ tPHL propagation delays and low noise (VOLP ≤ 0.9 V). The 3-state outputs exhibit symmetrical |IOH| = |IOL| ≥ 8 mA drive capability under 5V operation, supporting parallel bus loading up to 15 pF.

Key Specifications

Parameter	Value and Actual Design Meaning
Propagation Delay	5.4 ns (typ.) at VCC = 5V, CL = 15 pF - enables >100 MHz bus toggle rates in memory address paths
Output Drive	±8 mA (min.) at VCC = 4.5–5.5 V - drives standard TTL loads and 15 pF traces without buffering
Quiescent Current	4 µA (max.) at TA = 25°C - supports low-power standby in always-on industrial controllers
Input Voltage Range	0 to 7 V independent of VCC - allows hot-swap and mixed-voltage interface without level shifters
ESD Immunity	2 kV HBM - protects against handling discharge in automated PCB assembly lines
Operating Temperature	−55°C to +125°C - qualified for extended-range industrial and transportation electronics
Power Supply Range	4.5 V to 5.5 V - matches regulated 5V rails while tolerating line ripple and dropout

Pinout & Package

TSSOP-48 package: 12.6 mm × 8.1 mm body, 0.5 mm pitch, 48-pin thin shrink small outline package with exposed pad not present; RoHS-compliant, lead-free finish.

Pin/Terminal	Circuit Role	Design Meaning
1, 24, 25, 48	nG (1G–4G)	Active-low output enable per 4-bit group - enables independent gating of four 4-bit channels
2–3, 5–6, 8–9, 11–12, 13–14, 16–17, 19–20, 22–23, 26–27, 29–30, 32–33, 35–36, 37–38, 40–41, 43–44, 46–47	Yn / An	Non-inverting data outputs (Y) and inputs (A) - 16 bidirectional buffer pairs, pin-ordered A1–A4/G/ Y1–Y4 per group
4, 10, 15, 21, 28, 34, 39, 45	GND	Eight ground pins distributed for low-inductance return paths and reduced ground bounce
7, 18, 31, 42	VCC	Four dedicated power pins - decoupling support for high-speed switching across full 16-bit width

Key Features

Feature	Design Value
Power-down input protection	Accepts 0–7 V on all inputs with VCC = 0 V - prevents latch-up during partial power sequencing
Symmetrical output impedance	\|IOH\| = \|IOL\| ≥ 8 mA - ensures matched rise/fall times and minimal bus skew in multi-drop configurations
Low dynamic noise	VOLP ≤ 0.9 V (CL = 50 pF) - reduces simultaneous switching noise in dense backplane layouts
PIN- and function-compatible	Drop-in replacement for 74LS16244 and 74ALS16244 - preserves legacy board designs and test fixtures
Enhanced latch-up immunity	Qualified per JEDEC JESD78 - withstands >100 mA injected current without functional interruption

Applications

Industrial PLC Backplane Interface

Legacy Microprocessor I/O Expansion

Use Scenario: Interfacing 80C188EB CPU address/data bus to modular I/O cards in DIN-rail mounted controllers.

IC Role / Device Role / Timing Role: Non-inverting 3-state bus buffer isolating CPU from peripheral slots during DMA cycles.

Use Value: 5.4 ns tPD and 13 ns tPZL ensure cycle-accurate address latching without wait states at 12 MHz bus clock.

Use Scenario: Adding parallel GPIO to an aging 80286-based motion controller with limited address space.

IC Role / Device Role / Timing Role: 16-bit bidirectional buffer enabling shared data bus between CPU and FPGA-based stepper drivers.

Use Value: 0–7 V input tolerance permits direct connection to 3.3 V FPGA I/O without level translators, reducing BOM count.

Automotive Diagnostic Tool Adapter

Test Equipment Signal Conditioning

Use Scenario: Level-shifting and buffering ISO 9141-2 K-line signals between 5 V microcontroller and 12 V vehicle bus.

IC Role / Device Role / Timing Role: Input-tolerant buffer providing galvanically isolated signal conditioning path with ESD hardening.

Use Value: 2 kV HBM ESD rating and −55°C to +125°C operation meet automotive environmental stress requirements.

Use Scenario: Driving multiple logic analyzer channels from a single FPGA debug port in benchtop test fixtures.

IC Role / Device Role / Timing Role: Fan-out buffer distributing synchronized trace clocks and data bits with matched skew.

Use Value: Balanced tPLH/tPHL and symmetrical drive minimize inter-channel timing jitter below 100 ps.

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
SN74LVCH16244A	Lower VCC range (1.65–3.6 V), higher speed (tPD = 3.2 ns typ.), no 0–7 V input tolerance	Requires level translation when interfacing to 5 V systems; unsuitable for mixed-voltage hot-swap	Select only for pure 3.3 V domains where lower power and faster timing outweigh interface flexibility
74ABT16244	Higher drive (±32 mA), wider VCC (4.5–5.5 V), but no input overvoltage tolerance and higher ICC (20 mA)	Better for heavy capacitive loads (>50 pF), but lacks power-down safety and ESD margin of VHCT family	Prefer when driving long traces or multiple TTL inputs; avoid in thermally constrained or unregulated environments

Compared with SN74LVCH16244A and 74ABT16244, the 74VHCT16244ATTR uniquely combines 5 V TTL compatibility, 0–7 V input tolerance, and ultra-low ICC - making it optimal for legacy system upgrades requiring robustness over raw speed or drive strength.

Availability

74VHCT16244ATTR is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive diagnostic adapters, and legacy microprocessor I/O expansion requiring stable component supply across extended temperature and mixed-voltage conditions.

Supply support for 74VHCT16244ATTR 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, Switzerland, delivering silicon solutions for automotive, industrial, and power management applications since 1987.

The VHCT logic family targets 5 V systems requiring TTL-compatible inputs with CMOS efficiency - specifically engineered for seamless integration into legacy industrial and automotive control hardware undergoing obsolescence mitigation.

FAQ

Is the 74VHCT16244ATTR compatible with 3.3 V logic inputs?

Yes - its inputs tolerate 0–7 V regardless of VCC, so 3.3 V signals may be applied directly even when VCC = 5 V. This eliminates need for external level shifters in mixed-voltage interfaces, provided output loading remains within ±8 mA limits at 5 V.

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

The datasheet specifies AC performance up to 50 pF (tPLH/tPHL ≤ 11.0 ns at VCC = 5 V). For stable 3-state transitions, total load including trace and stub capacitance should not exceed 45 pF to maintain tPZL/tPLZ ≤ 13.0 ns and avoid excessive ringing or undershoot.

Does this part support hot insertion into a live 5 V backplane?

Yes - the 0–7 V input tolerance and power-down protection allow safe connection while VCC is off or ramping. However, outputs must remain in high-impedance state (nG = HIGH) until VCC stabilizes above 4.5 V to prevent contention or excessive current draw.

How does the 74VHCT16244ATTR handle ground bounce in high-speed switching?

Its eight dedicated GND pins and four VCC pins reduce common-impedance coupling. Measured VOLP ≤ 0.9 V at CL = 50 pF confirms low simultaneous switching noise - critical for maintaining signal integrity in 16-bit parallel buses operating above 10 MHz.

74VHCT16244ATTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: 74VHCT

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:: 8mA, 8mA

Voltage - Supply:: 4.5V ~ 5.5V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-TSSOP

74VHCT16244ATTR FAQ

1.How can I place an order for 74VHCT16244ATTR through Aetrix?

Please submit a Request for Quotation (RFQ) for 74VHCT16244ATTR 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 74VHCT16244ATTR reliable?

The price and inventory of 74VHCT16244ATTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VHCT16244ATTR is usually 5 days.

3.What payment methods are accepted for 74VHCT16244ATTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VHCT16244ATTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74VHCT16244ATTR?

74VHCT16244ATTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74VHCT16244ATTR 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 74VHCT16244ATTR?

For technical support, including 74VHCT16244ATTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VHCT16244ATTR requirements.

6.How does Aetrix verify that 74VHCT16244ATTR is sourced from the original manufacturer or authorized distributors?

All 74VHCT16244ATTR 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 74VHCT16244ATTR meets industry standards.

7.What is the process for return or replacement of 74VHCT16244ATTR?

All 74VHCT16244ATTR units undergo pre-shipment inspection (PSI). If there is an issue with 74VHCT16244ATTR, 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 74VHCT16244ATTR part is unused and in its original packaging.

Return procedure for 74VHCT16244ATTR:

1.Submit a request within 90 days.

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

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