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

onsemi 74VCX32244GX

Name: 74VCX32244GX
Brand: onsemi
SKU: 74VCX32244GX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74VCX32244GX

Manufacturer:: onsemi

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 96-LFBGA

Datasheet:: 74VCX32244GX.pdf

Description:: IC BUF NON-INVERT 3.6V 96FBGA

Quantity:: RFQ Add To RFQ list

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Product details

Overview

74VCX32244GX from Fairchild Semiconductor is a low-voltage 32-bit non-inverting buffer/line driver with eight independent 4-bit nibble controls, 3.6V-tolerant I/O, and 2.5 ns max propagation delay at 3.3V - deployed in memory address buffering, high-speed bus interfacing, and clock distribution systems operating from 1.2V to 3.6V V_CC.

For engineers reviewing the 74VCX32244GX datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, FBGA96A package mapping, nibble-level 3-STATE control behavior, ±24 mA drive strength at 3.0V, and live-insertion support per Fairchild DS500416.

Technical Context

The 74VCX32244GX implements eight independent 4-bit output-enable groups (OE1–OE8), each controlling four non-inverting buffers (e.g., OE1 → O0–O3). All inputs and outputs tolerate up to 3.6V regardless of V_CC (1.2V–3.6V), enabling mixed-voltage domain interfacing without level shifters.

It features power-off high-impedance I/O, patented EMI/noise reduction circuitry, and supports live insertion via pull-up on OE pins. Propagation delay (t_PHL/t_PLH) is specified down to 1.2V V_CC, with t_PZL/t_PLZ ≤ 3.5 ns at 3.3V - critical for synchronous bus timing integrity.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.2V to 3.6V - enables direct interface with 1.2V, 1.8V, 2.5V, and 3.3V logic domains
I/O Voltage Tolerance	Up to 3.6V - allows safe connection to higher-voltage buses without external clamping
t_PD Max	2.5 ns at V_CC = 3.3V - ensures sub-400 MHz bus operation with timing margin
I_OH/I_OL	±24 mA at V_CC = 3.0V - drives 50Ω transmission lines or multiple CMOS loads
3-STATE Enable/Disable Time	t_PZL/t_PLZ ≤ 3.5 ns at V_CC = 3.3V - minimizes bus contention during hot-swap transitions
Input Leakage	±5.0 µA max - negligible loading on high-impedance source nodes
Power-Off High-Z	True - inputs and outputs float to high-impedance when V_CC = 0V, preventing backdrive

Pinout & Package

74VCX32244GX is packaged in a 96-ball Fine-Pitch Ball Grid Array (FBGA), JEDEC MO-205 compliant, 5.5 mm × 5.5 mm body, 0.5 mm pitch, BGA96A footprint.

Pin/Terminal	Circuit Role	Design Meaning
OEn (OE1–OE8)	Active-Low Output Enable per nibble	Each OE controls 4 outputs (e.g., OE1 → O0–O3); shorting enables wider bus groupings
I0–I31	Buffer input	32 single-ended CMOS inputs; 3.6V tolerant, static drive compatible
O0–O31	Non-inverting 3-STATE output	32 buffered outputs with ±24 mA sink/source at 3.0V; high-Z when corresponding OEn = HIGH
V_CC	Power supply	Single supply rail (1.2V–3.6V); multiple V_CC balls distributed across package for low noise
GND	Ground reference	Multiple GND balls placed adjacent to V_CC for minimized loop inductance

Key Features

Feature	Design Value
Nibble-level 3-STATE control	Eight independent OE inputs enable granular bus partitioning - e.g., isolate memory banks or peripheral lanes without full-bus disable
3.6V-tolerant I/O at any V_CC	Eliminates need for external voltage translators when interfacing 3.3V peripherals to 1.2V/1.8V SoCs
Live insertion support	Power-off high-Z + controlled OE pull-up ensures no bus contention during hot-plug events
Low-noise switching architecture	Patented EMI reduction circuitry limits ground bounce and crosstalk in dense PCB layouts
Latch-up immunity	Exceeds 300 mA - meets JEDEC JESD78 requirements for robust operation in industrial environments

Applications

Memory Address Buffering	High-Speed Parallel Bus Interface
Use Scenario: Driving 32-bit address lines from a low-voltage microcontroller to DDR SDRAM or Flash memory with 3.3V address bus tolerance. IC Role / Device Role / Timing Role: Non-inverting buffer with nibble-controlled 3-STATE for bank-select isolation and timing-critical address propagation. Use Value: 2.5 ns t_PD at 3.3V ensures setup/hold compliance; 3.6V I/O tolerance prevents damage from memory-side overshoot.	Use Scenario: Interfacing a 1.8V FPGA I/O bank to a 3.3V peripheral bus (e.g., PCI-X control signals or legacy parallel interface). IC Role / Device Role / Timing Role: Level-shifting line driver with independent nibble enables, supporting partial bus arbitration and hot-swap readiness. Use Value: Eliminates discrete level shifters; ±24 mA drive sustains signal integrity over 10 cm traces at 100 MHz.
Clock Distribution Network	Hot-Swappable Backplane Transceiver
Use Scenario: Fan-out of a low-jitter system clock to multiple 1.2V/1.8V clock domains while maintaining edge fidelity and skew control. IC Role / Device Role / Timing Role: Low-skew, low-capacitance (C_IN = 6 pF, C_OUT = 7 pF) buffer with matched propagation paths per nibble group. Use Value: 300 ps typical inter-output skew and <2.5 ns t_PD preserve clock phase alignment across 32 endpoints.	Use Scenario: Enabling hot-plug capability for modular I/O cards in industrial backplanes where V_CC ramps asynchronously. IC Role / Device Role / Timing Role: Live-insertion-ready buffer with power-off high-Z I/O and OE-controlled isolation per 4-bit lane. Use Value: Prevents backdrive during card insertion; t_PZL ≤ 3.5 ns ensures rapid bus release before new card asserts control.

Memory Address Buffering

High-Speed Parallel Bus Interface

Use Scenario: Driving 32-bit address lines from a low-voltage microcontroller to DDR SDRAM or Flash memory with 3.3V address bus tolerance.

IC Role / Device Role / Timing Role: Non-inverting buffer with nibble-controlled 3-STATE for bank-select isolation and timing-critical address propagation.

Use Value: 2.5 ns t_PD at 3.3V ensures setup/hold compliance; 3.6V I/O tolerance prevents damage from memory-side overshoot.

Use Scenario: Interfacing a 1.8V FPGA I/O bank to a 3.3V peripheral bus (e.g., PCI-X control signals or legacy parallel interface).

IC Role / Device Role / Timing Role: Level-shifting line driver with independent nibble enables, supporting partial bus arbitration and hot-swap readiness.

Use Value: Eliminates discrete level shifters; ±24 mA drive sustains signal integrity over 10 cm traces at 100 MHz.

Clock Distribution Network

Hot-Swappable Backplane Transceiver

Use Scenario: Fan-out of a low-jitter system clock to multiple 1.2V/1.8V clock domains while maintaining edge fidelity and skew control.

IC Role / Device Role / Timing Role: Low-skew, low-capacitance (C_IN = 6 pF, C_OUT = 7 pF) buffer with matched propagation paths per nibble group.

Use Value: 300 ps typical inter-output skew and <2.5 ns t_PD preserve clock phase alignment across 32 endpoints.

Use Scenario: Enabling hot-plug capability for modular I/O cards in industrial backplanes where V_CC ramps asynchronously.

IC Role / Device Role / Timing Role: Live-insertion-ready buffer with power-off high-Z I/O and OE-controlled isolation per 4-bit lane.

Use Value: Prevents backdrive during card insertion; t_PZL ≤ 3.5 ns ensures rapid bus release before new card asserts control.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74VC32244RGZR	Texas Instruments variant in 96-pin VQFN; identical 1.2V–3.6V V_CC, 3.6V I/O tolerance, but t_PD = 3.2 ns max at 3.3V	Higher thermal resistance (θ_JA = 32°C/W vs. Fairchild's 28°C/W) limits sustained 24 mA drive in compact layouts	Prefer for TI-design ecosystems; verify layout cooling if driving >16 outputs continuously
74ALVC32244BQ	Nexperia FBGA96 variant; same pinout and DC specs, but AC specs tested only to −40°C/+125°C; t_PZL = 4.0 ns max	Qualified for extended temperature range; suitable for automotive under-hood use but slower enable/disable timing	Select when AEC-Q100 Grade 2 qualification is required; accept 0.5 ns longer bus release latency

Compared with SN74VC32244RGZR and 74ALVC32244BQ, the 74VCX32244GX delivers the fastest propagation (2.5 ns) and tightest 3-STATE timing (3.5 ns), making it optimal for high-frequency memory and clock fan-out where nanosecond-level margins matter.

Availability

74VCX32244GX is available at Aetrix Electronics and suitable for memory subsystem design, high-speed parallel interface development, and industrial backplane applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for 74VCX32244GX 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

Fairchild Semiconductor was a U.S.-based analog and power IC designer acquired by ON Semiconductor in 2016; its VCX logic family remains widely deployed in industrial and communications infrastructure.

The 74VCX32244GX belongs to Fairchild's VCX low-voltage logic series, engineered specifically for mixed-supply systems needing 3.6V-tolerant I/O, sub-3 ns speed, and live-insertion reliability without external support components.

FAQ

What is the maximum operating frequency supported by the 74VCX32244GX?

The 74VCX32244GX does not specify a maximum clock frequency directly, but its 2.5 ns maximum propagation delay (t_PD) at 3.3V V_CC implies reliable operation up to ~400 MHz for single-cycle data paths. For bidirectional bus applications, the 3.5 ns 3-STATE enable/disable time further constrains usable toggle rates to ~285 MHz to maintain clean bus turnaround. Real-world frequency limits depend on load capacitance and termination.

Does the 74VCX32244GX require external pull-up resistors on OE pins?

Yes - Fairchild DS500416 Note 1 explicitly states that OE pins must be tied to V_CC through a pull-up resistor during power-up/down to guarantee high-impedance outputs. The minimum resistor value depends on the driver's current-sourcing capability; typical designs use 4.7 kΩ to 10 kΩ for 3.3V systems. Leaving OE floating risks bus contention.

Can the 74VCX32244GX safely interface between a 1.2V FPGA and a 3.3V ADC?

Yes - the 74VCX32244GX accepts 1.2V–3.6V inputs and drives outputs up to 3.6V regardless of V_CC. With V_CC = 1.2V, its outputs swing 0V to 1.2V (active) or float to 3.6V-tolerant high-Z (3-STATE), allowing safe connection to 3.3V ADC inputs. Input thresholds scale with V_CC (e.g., VIH = 0.65×V_CC at 1.2V), ensuring correct logic recognition.

What is the thermal performance of the 74VCX32244GX in FBGA96A package?

The 74VCX32244GX in BGA96A package has a junction-to-ambient thermal resistance (θ_JA) of 28°C/W under standard JEDEC test conditions (2S2P board). At full 32-bit drive (±24 mA per output at 3.0V), worst-case power dissipation is ~23 mW static + ~120 mW dynamic (CPD = 20 pF, f = 100 MHz), resulting in <4°C junction rise above ambient - well within safe SOA limits.

Is the 74VCX32244GX pin-compatible with other 32-bit VCX buffers like the 74VCX162244?

No - the 74VCX32244GX uses a 96-ball FBGA (BGA96A) with nibble-grouped OE pins (OE1–OE8), whereas the 74VCX162244 is a 48-pin TSSOP with dual 16-bit OE controls. Pin count, ball layout, and OE architecture differ fundamentally; PCB redesign is required for substitution. Functional equivalence exists, but mechanical compatibility does not.

74VCX32244GX Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74VCX

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:: 24mA, 24mA

Voltage - Supply:: 1.2V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 96-FBGA (13.5x5.5)

74VCX32244GX FAQ

1.How can I place an order for 74VCX32244GX through Aetrix?

Please submit a Request for Quotation (RFQ) for 74VCX32244GX 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 74VCX32244GX reliable?

The price and inventory of 74VCX32244GX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VCX32244GX is usually 5 days.

3.What payment methods are accepted for 74VCX32244GX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VCX32244GX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74VCX32244GX?

74VCX32244GX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74VCX32244GX 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 74VCX32244GX?

For technical support, including 74VCX32244GX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VCX32244GX requirements.

6.How does Aetrix verify that 74VCX32244GX is sourced from the original manufacturer or authorized distributors?

All 74VCX32244GX 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 74VCX32244GX meets industry standards.

7.What is the process for return or replacement of 74VCX32244GX?

All 74VCX32244GX units undergo pre-shipment inspection (PSI). If there is an issue with 74VCX32244GX, 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 74VCX32244GX part is unused and in its original packaging.

Return procedure for 74VCX32244GX:

1.Submit a request within 90 days.

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

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