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

STMicroelectronics 74VCXH16244TTR

Name: 74VCXH16244TTR
Brand: STMicroelectronics
SKU: 74VCXH16244TTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74VCXH16244TTR

Manufacturer:: STMicroelectronics

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: 74VCXH16244TTR.pdf

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

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Product details

Overview

74VCXH16244TTR from STMicroelectronics is a low-voltage CMOS 16-bit non-inverting bus buffer with 3-state outputs, 3.6V-tolerant I/O, 2.3V–3.6V operating range, 2.5 ns max propagation delay at 3.0–3.6V, and bus-hold inputs eliminating external pull resistors. It serves as a high-speed bidirectional data path controller in memory address driver and system bus isolation applications.

For engineers reviewing the 74VCXH16244TTR datasheet, 74VCXH16244TTR pinout, 74VCXH16244TTR application, or 74VCXH16244TTR equivalent, key selection criteria include 3.6V I/O tolerance, symmetrical ±24 mA drive strength at 3.0V, output enable timing (tPZL/tPLZ ≤ 3.5 ns), bus-hold functionality, and TSSOP-48 package compatibility with legacy 74-series H16244 layouts.

Technical Context

This device implements four independent 4-bit non-inverting 3-state buffers, each controlled by a dedicated active-low output enable (nG) input-pins 1, 24, 25, and 48 govern Y1–Y4 groups respectively. All 16 outputs enter high-impedance state when their associated nG is HIGH.

Designed for mixed-voltage interfacing, it supports 2.3V–3.6V core operation while accepting and driving signals up to 3.6V on all I/O pins without level shifters. Bus-hold circuitry maintains valid logic states on unused or floating inputs, with hold current ±75 µA at VCC = 3.0V and VI = 0.8V/2.0V.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.3V to 3.6V - enables direct integration into 2.5V/3.3V systems without voltage translation
t_PD (max)	2.5 ns at V_CC = 3.0–3.6V - supports >300 MHz bus toggle rates in high-speed memory interfaces
I_OH/I_OL	±24 mA min at V_CC = 3.0V - drives 50Ω transmission lines or multiple CMOS loads with controlled edge rates
I/O Voltage Tolerance	Up to 3.6V - allows safe connection to 3.3V or 3.6V buses while powered from lower V_CC
Bus-Hold Current	±75 µA at V_CC = 3.0V - eliminates need for external pull-up/down resistors on unterminated data lines
Output Skew	0.5 ns max - ensures deterministic timing across all 16 outputs during parallel switching events

Pinout & Package

TSSOP-48 (Thin Shrink Small Outline Package), 12.6 mm × 8.1 mm body, 0.5 mm pitch, 48-pin surface-mount, JEDEC MO-153 compliant.

Pin/Terminal	Circuit Role	Design Meaning
1, 24, 25, 48	Active-Low Output Enable (nG)	Each controls 4 outputs (e.g., pin 1 enables Y1–Y4); HIGH forces associated outputs to high-Z
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	Data Outputs (Y)	16 total non-inverting buffered outputs; each pair corresponds to one bit per 4-bit group
43–46, 40–41, 37–38, 35–36, 32–33, 29–30, 26–27, 22–23, 19–20, 16–17, 13–14, 11–12, 8–9, 5–6, 3–2, 47–46	Data Inputs (A)	16 total inputs mapped 1:1 to outputs; bus-hold enabled on all A pins
4, 10, 15, 21, 28, 34, 39, 45	GND	Eight ground connections distributed for low-inductance return paths and noise reduction
7, 18, 31, 42	V_CC	Four power supply pins placed to minimize IR drop and improve decoupling effectiveness

Key Features

Feature	Design Value
3.6V-Tolerant I/O	Inputs and outputs withstand up to 3.6V regardless of V_CC (2.3–3.6V), enabling robust mixed-voltage board design
Symmetrical Drive Strength	±24 mA output current at V_CC = 3.0V ensures matched rise/fall times and reduced signal distortion
Integrated Bus-Hold	Eliminates external biasing components on data inputs, reducing BOM count and PCB area in sparse-bus configurations
Low Propagation Delay	2.5 ns max t_PD at 3.3V supports tight timing budgets in high-frequency address/data latching circuits

Applications

Memory Address Buffering

PCI/PCIe Slot Interface Isolation

Use Scenario: Driving 16-bit address lines from a low-voltage microcontroller to SRAM or Flash memory operating at 3.3V.

IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing voltage-level compatible, skew-controlled address propagation with bus-hold stability.

Use Value: Enables direct interface between 2.5V CPU and 3.3V memory without level shifters; 2.5 ns delay preserves setup/hold margins.

Use Scenario: Isolating configuration address/data buses between host bridge and add-in card in industrial PCIe-based control systems.

IC Role / Device Role / Timing Role: Bidirectional bus buffer with independent 4-bit group enables/disables for hot-plug-safe slot enumeration.

Use Value: Prevents back-driving during card insertion; 3.6V tolerance protects against overshoot on shared bus lines.

Industrial Backplane Data Routing

Low-Power FPGA I/O Expansion

Use Scenario: Routing parallel sensor data from multiple 16-bit ADCs to a central DSP over a 20 cm backplane trace.

IC Role / Device Role / Timing Role: High-drive-strength repeater with matched impedance and low skew to maintain signal integrity across long traces.

Use Value: ±24 mA drive compensates for trace capacitance; 0.5 ns skew prevents inter-bit timing violations.

Use Scenario: Expanding I/O count of a battery-powered FPGA by adding 16-bit parallel peripheral interface with minimal quiescent current.

IC Role / Device Role / Timing Role: Low-power (20 µA ICC), bus-hold-equipped buffer enabling reliable I/O retention during FPGA reconfiguration.

Use Value: Eliminates need for external keep-alive resistors; 2.3V minimum V_CC extends battery life in portable instrumentation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC16244ADGGR	Lower drive (±24 mA @ 3.3V but only ±16 mA @ 2.7V); no bus-hold; 3.6V I/O tolerance confirmed	Requires external pull resistors on floating inputs; slightly higher t_PD (3.2 ns)	Select if cost sensitivity outweighs bus-hold convenience and skew performance
74ALVC16244PW	Higher speed (t_PD = 2.1 ns), same bus-hold and 3.6V tolerance; operates down to 2.0V	Wider V_CC range may increase noise susceptibility in 2.5V-only systems	Select for maximum speed in 3.3V systems where tighter timing closure is critical

Compared with SN74LVC16244ADGGR and 74ALVC16244PW, the 74VCXH16244TTR offers optimal balance of 2.5 ns speed, integrated bus-hold, and proven 2.3V–3.6V operational margin-making it preferred for industrial memory subsystems requiring robustness over marginal speed gains.

Availability

74VCXH16244TTR is available at Aetrix Electronics and suitable for memory address buffering, PCI slot isolation, industrial backplane routing, and low-power FPGA I/O expansion requiring stable component supply across extended temperature ranges (–55°C to +125°C).

Supply support for 74VCXH16244TTR 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, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The VCXH logic family targets high-speed, low-voltage 3-state buffering with enhanced I/O tolerance and bus-hold-specifically engineered for reliable mixed-voltage system interconnect in industrial and telecom infrastructure.

FAQ

What is the maximum output current capability of the 74VCXH16244TTR at 2.5V V_CC?

At V_CC = 2.5V (within the 2.3V–2.7V operating range), the device guarantees ±18 mA output current for both high and low states per output, measured under standard load conditions (CL = 30 pF, RL = 500 Ω). This is specified in the DC Electrical Characteristics table on page 5 of the datasheet.

Does the 74VCXH16244TTR require external pull-up or pull-down resistors on its inputs?

No. The device integrates bus-hold circuitry on all 16 data inputs (A pins), maintaining valid logic levels when inputs are un-driven or floating. Hold current is ±75 µA at V_CC = 3.0V and VI = 0.8V/2.0V, eliminating the need for external biasing components.

Can the 74VCXH16244TTR be used in a system where V_CC = 2.5V but I/O signals swing to 3.3V?

Yes. Its 3.6V-tolerant inputs and outputs allow safe operation with 3.3V signal levels while powered from 2.5V V_CC, provided all I/O voltages remain within –0.5V to +3.6V and do not exceed V_CC + 0.5V in active state-verified by absolute maximum ratings and recommended operating conditions.

How many independent output-enable groups does the 74VCXH16244TTR support?

The device supports four independent output-enable groups, each controlling four outputs: pins 1 (1G), 24 (2G), 25 (3G), and 48 (4G) respectively. This enables selective activation of 4-bit segments-e.g., enabling only address bits A0–A3 while holding A4–A15 in high-Z during partial bus access.

74VCXH16244TTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: 74VCXH

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:: 2.3V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-TSSOP

74VCXH16244TTR FAQ

1.How can I place an order for 74VCXH16244TTR through Aetrix?

Please submit a Request for Quotation (RFQ) for 74VCXH16244TTR 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 74VCXH16244TTR reliable?

The price and inventory of 74VCXH16244TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VCXH16244TTR is usually 5 days.

3.What payment methods are accepted for 74VCXH16244TTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VCXH16244TTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74VCXH16244TTR?

74VCXH16244TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74VCXH16244TTR 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 74VCXH16244TTR?

For technical support, including 74VCXH16244TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VCXH16244TTR requirements.

6.How does Aetrix verify that 74VCXH16244TTR is sourced from the original manufacturer or authorized distributors?

All 74VCXH16244TTR 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 74VCXH16244TTR meets industry standards.

7.What is the process for return or replacement of 74VCXH16244TTR?

All 74VCXH16244TTR units undergo pre-shipment inspection (PSI). If there is an issue with 74VCXH16244TTR, 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 74VCXH16244TTR part is unused and in its original packaging.

Return procedure for 74VCXH16244TTR:

1.Submit a request within 90 days.

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

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