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

onsemi 74VCXH162244MTX

Name: 74VCXH162244MTX
Brand: onsemi
SKU: 74VCXH162244MTX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74VCXH162244MTX

Manufacturer:: onsemi

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: 74VCXH162244MTX.pdf

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

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Product details

Overview

74VCXH162244 from Fairchild Semiconductor is a low-voltage 16-bit non-inverting buffer/line driver with bushold inputs and integrated 26Ω series output resistors, designed for memory address, clock, and bus transceiver applications operating from 1.4V to 3.6V V_CC, delivering 12 mA I_OH/I_OL drive at 3.0V and 3.3 ns max t_PD.

For engineers reviewing the 74VCXH162244 datasheet, pinout, applications, or equivalent options, key selection criteria include nibble-level 3-STATE control, bushold input retention without external pull-ups, 3.6V-tolerant I/O, output-series termination, and TSSOP-48 packaging for high-density PCB layouts.

Technical Context

The 74VCXH162244 implements four independent 4-bit nibble groups, each with dedicated active-low Output Enable (OEn) inputs enabling selective 3-STATE control per group. Its bushold circuitry actively maintains valid logic states on floating I0–I15 inputs without external biasing.

Each output integrates a 26Ω series resistor to suppress transmission-line reflections and reduce EMI in high-speed routing. The device operates across 1.4V–3.6V V_CC, supports 3.6V-tolerant control and data I/O, and achieves ≤3.3 ns propagation delay at 3.3V with 30 pF load.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.4V to 3.6V - Enables direct interface with 1.8V, 2.5V, and 3.3V logic domains without level shifters.
I_OH/I_OL	±12 mA @ 3.0V - Sufficient drive strength for fan-out to multiple CMOS loads or short traces.
t_PD Max	3.3 ns @ V_CC = 3.3V - Supports >100 MHz clock/data rates in address or timing paths.
Output Series R	26 Ω - Integrated termination reduces ringing and EMI on PCB traces driving memory or buses.
Bushold Current	75 µA min @ V_IN = 0.8V, V_CC = 3.0V - Actively holds floating inputs at valid logic levels, eliminating external pull-up resistors.
3-STATE Enable/Disable	t_PZL/t_PLZ ≤ 3.8 ns @ 3.3V - Fast output gating enables dynamic bus sharing with minimal contention window.

Pinout & Package

74VCXH162244 is housed in a 48-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, 6.1 mm wide, with 0.5 mm lead pitch and exposed pad not present. Pin numbering follows standard dual-row TSSOP convention, with pins 1–24 on top row (left to right) and 25–48 on bottom row (right to left).

Pin/Terminal	Circuit Role	Design Meaning
OEn (n=1–4)	Nibble 3-STATE Control Input (Active LOW)	Four independent enables (OE1–OE4) allow per-nibble output gating; shorting enables full 16-bit operation.
I0–I15	Bushold Data Inputs	Non-inverting inputs with active hold circuitry retain last valid state when un-driven - no external pull resistors required.
O0–O15	Buffered Outputs with 26Ω Series Resistor	Outputs drive external loads with built-in source termination; compatible with 50Ω transmission lines and reduced edge overshoot.

Key Features

Feature	Design Value
Nibble-selectable 3-STATE control	Four independent OE inputs enable flexible bus partitioning - e.g., isolate memory banks or peripheral segments independently.
Integrated 26Ω output series resistors	Eliminates need for discrete series termination components, saving board space and reducing signal integrity tuning effort.
Bushold inputs (I0–I15)	Maintains stable logic state on unused or disconnected inputs - prevents metastability and system glitches in hot-plug or partial-load scenarios.
3.6V-tolerant I/O	Accepts 0–3.6V input signals and drives up to 3.6V outputs while powered from as low as 1.4V - simplifies mixed-voltage interface design.

Applications

Memory Address Driver	Clock Distribution Buffer
Use Scenario: Driving 16-bit address bus to SRAM or Flash memory in portable embedded systems with 1.8V core supply. IC Role / Device Role / Timing Role: Non-inverting buffer with per-nibble 3-STATE control isolates memory banks during page switching. Use Value: Bushold prevents floating address lines during chip select transitions; 26Ω outputs suppress ringing on parallel traces routed to memory devices.	Use Scenario: Distributing a 50 MHz system clock to multiple low-voltage peripherals (e.g., ADC, UART, GPIO expanders) on a 2.5V domain. IC Role / Device Role / Timing Role: Low-skew, low-jitter line driver with fast enable/disable for clock gating. Use Value: 3.3 ns t_PD and <0.5 ns skew ensure synchronous sampling; 3.6V tolerance allows interfacing with legacy 3.3V peripherals.
Bus Transceiver Interface	Low-Voltage I/O Expansion
Use Scenario: Bidirectional data buffering between a 1.8V FPGA and 3.3V peripheral ASIC on shared data bus. IC Role / Device Role / Timing Role: Unidirectional transmitter/receiver buffer with 3-STATE outputs controlled by direction logic. Use Value: 3.6V-tolerant I/O and 12 mA drive support robust voltage translation; 26Ω resistors dampen reflections on long bus runs.	Use Scenario: Expanding GPIO count on an ultra-low-power microcontroller running at 1.4V V_CC while interfacing with 3.3V sensors. IC Role / Device Role / Timing Role: Level-shifting buffer with bushold protection for sparsely populated I/O headers. Use Value: Operates down to 1.4V V_CC; bushold eliminates pull-up resistors on unused pins - critical for battery-powered designs.

Memory Address Driver

Clock Distribution Buffer

Use Scenario: Driving 16-bit address bus to SRAM or Flash memory in portable embedded systems with 1.8V core supply.

IC Role / Device Role / Timing Role: Non-inverting buffer with per-nibble 3-STATE control isolates memory banks during page switching.

Use Value: Bushold prevents floating address lines during chip select transitions; 26Ω outputs suppress ringing on parallel traces routed to memory devices.

Use Scenario: Distributing a 50 MHz system clock to multiple low-voltage peripherals (e.g., ADC, UART, GPIO expanders) on a 2.5V domain.

IC Role / Device Role / Timing Role: Low-skew, low-jitter line driver with fast enable/disable for clock gating.

Use Value: 3.3 ns t_PD and <0.5 ns skew ensure synchronous sampling; 3.6V tolerance allows interfacing with legacy 3.3V peripherals.

Bus Transceiver Interface

Low-Voltage I/O Expansion

Use Scenario: Bidirectional data buffering between a 1.8V FPGA and 3.3V peripheral ASIC on shared data bus.

IC Role / Device Role / Timing Role: Unidirectional transmitter/receiver buffer with 3-STATE outputs controlled by direction logic.

Use Value: 3.6V-tolerant I/O and 12 mA drive support robust voltage translation; 26Ω resistors dampen reflections on long bus runs.

Use Scenario: Expanding GPIO count on an ultra-low-power microcontroller running at 1.4V V_CC while interfacing with 3.3V sensors.

IC Role / Device Role / Timing Role: Level-shifting buffer with bushold protection for sparsely populated I/O headers.

Use Value: Operates down to 1.4V V_CC; bushold eliminates pull-up resistors on unused pins - critical for battery-powered designs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit buffer/line driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC162244ADGGR	No bushold; no integrated series resistors; 1.65–3.6V V_CC; 24 mA drive; 4.2 ns t_PD.	Requires external pull-ups on unused inputs; needs discrete series termination for EMI control.	Preferred where higher drive strength and lower cost outweigh bushold convenience and built-in termination.
74ALVC162244PAG	No bushold; no series resistors; 2.3–3.6V V_CC; 24 mA drive; 3.2 ns t_PD; different pinout (TSSOP-48 but incompatible mapping).	Not pin-compatible; requires PCB redesign; lacks low-voltage operation below 2.3V.	Consider only for 3.3V-only systems needing faster propagation and higher drive, with layout flexibility.

Compared with SN74LVC162244ADGGR and 74ALVC162244PAG, the 74VCXH162244 uniquely combines bushold, integrated 26Ω termination, and 1.4V operation - making it optimal for compact, low-power, mixed-voltage bus interfaces where board space and reliability under floating conditions are critical.

Availability

74VCXH162244 is available at Aetrix Electronics and suitable for memory address drivers, clock distribution networks, and low-voltage bus transceivers requiring stable component supply, long-term lifecycle support, and consistent TSSOP-48 packaging.

Supply support for 74VCXH162244 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 designer of high-performance analog and power ICs, acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed in industrial and computing infrastructure.

The VCXH family was engineered for low-voltage, high-speed digital interface applications demanding noise immunity, bus integrity, and simplified board design - especially in memory subsystems and mixed-supply systems.

FAQ

What is the minimum V_CC required for reliable operation of the 74VCXH162244?

The 74VCXH162244 is fully specified to operate down to 1.4V V_CC across the full industrial temperature range (−40°C to +85°C). At 1.4V, it delivers ±2 mA output drive and supports data retention functionality. Operation below 1.4V is not guaranteed and may result in undefined logic behavior or increased propagation delay.

Does the 74VCXH162244 require external pull-up resistors on its inputs?

No. The 74VCXH162244 features active bushold circuitry on all 16 data inputs (I0–I15), which maintains the last valid logic state when inputs are floating or un-driven. This eliminates the need for external pull-up or pull-down resistors, reducing BOM count and PCB area - a key advantage in space-constrained designs.

What is the purpose of the 26Ω series resistors in the 74VCXH162244 outputs?

The 26Ω series resistors integrated into each output of the 74VCXH162244 serve as source termination to match typical PCB trace impedances (≈50Ω), thereby suppressing signal reflections, reducing EMI, and minimizing overshoot/ringing - especially critical in memory address and clock distribution applications with fast edges and longer traces.

Is the 74VCXH162244 pin-compatible with standard 16-bit buffers like the 74LVC162244?

No. While both are 48-pin TSSOP devices, the 74VCXH162244 has a unique pinout optimized for nibble-level control (four separate OE inputs) and bushold inputs. It is not pin-compatible with 74LVC162244 or 74ALVC162244 - PCB layout must be designed specifically for the 74VCXH162244's pin mapping and signal grouping.

Can the 74VCXH162244 interface directly with 3.3V logic while powered from 1.8V?

Yes. All inputs and outputs of the 74VCXH162244 are 3.6V-tolerant, meaning they accept and drive signals up to 3.6V regardless of V_CC (1.4V–3.6V). When powered from 1.8V, it can safely receive 3.3V control or data signals and drive 3.3V loads - enabling seamless level translation without external circuitry.

74VCXH162244MTX Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

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:: 12mA, 12mA

Voltage - Supply:: 1.4V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-TSSOP

74VCXH162244MTX FAQ

1.How can I place an order for 74VCXH162244MTX through Aetrix?

Please submit a Request for Quotation (RFQ) for 74VCXH162244MTX 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 74VCXH162244MTX reliable?

The price and inventory of 74VCXH162244MTX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VCXH162244MTX is usually 5 days.

3.What payment methods are accepted for 74VCXH162244MTX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VCXH162244MTX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74VCXH162244MTX?

74VCXH162244MTX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74VCXH162244MTX 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 74VCXH162244MTX?

For technical support, including 74VCXH162244MTX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VCXH162244MTX requirements.

6.How does Aetrix verify that 74VCXH162244MTX is sourced from the original manufacturer or authorized distributors?

All 74VCXH162244MTX 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 74VCXH162244MTX meets industry standards.

7.What is the process for return or replacement of 74VCXH162244MTX?

All 74VCXH162244MTX units undergo pre-shipment inspection (PSI). If there is an issue with 74VCXH162244MTX, 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 74VCXH162244MTX part is unused and in its original packaging.

Return procedure for 74VCXH162244MTX:

1.Submit a request within 90 days.

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

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