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

onsemi 74VCX162827MTD

Name: 74VCX162827MTD
Brand: onsemi
SKU: 74VCX162827MTD
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74VCX162827MTD

Manufacturer:: onsemi

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 56-TFSOP (0.240", 6.10mm Width)

Datasheet:: 74VCX162827MTD.pdf

Description:: IC BUF NON-INVERT 3.6V 56TSSOP

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Product details

Overview

74VCX162827MTD from Fairchild Semiconductor is a low-voltage 20-bit non-inverting buffer/line driver with 3-STATE outputs, 3.6V-tolerant I/O, integrated 26Ω output series resistors, and byte-level NOR output enable control (OE1–OE4). It operates from 1.4V to 3.6V V_CC, delivers ±12 mA drive at 3.0V, and achieves 3.4 ns max propagation delay - optimized for memory/address bus driving in compact 56-pin TSSOP systems.

For engineers reviewing the 74VCX162827MTD datasheet, pinout, applications, or equivalent options, key selection criteria include 3.6V I/O tolerance across 1.4–3.6V supply range, 26Ω built-in output termination, byte-wise 3-STATE control, power-off high-impedance behavior, and ESD robustness (>2000V HBM).

Technical Context

The 74VCX162827MTD implements twenty independent non-inverting buffers partitioned into two 10-bit bytes (I0–I9/O0–O9 and I10–I19/O10–O19), each controlled by dual active-low NOR enables (OE1/OE2 for Byte 1; OE3/OE4 for Byte 2). This architecture enables selective 10-bit isolation without affecting adjacent data paths.

It integrates 26Ω series resistors directly in each output path to suppress transmission-line reflections and reduce EMI, while maintaining full 3.6V I/O tolerance regardless of V_CC level (1.4V–3.6V). Power-off high-impedance ensures safe hot-swap operation without bus contention.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.4V to 3.6V - supports mixed-voltage system interfacing and battery-powered low-power designs
I/O Voltage Tolerance	−0.5V to +3.6V - enables direct connection to 3.3V or 2.5V buses without level shifters
Output Series Resistance	26Ω - integrated termination reduces signal overshoot/ringing on PCB traces up to ~10 cm
t_PD Max	3.4 ns @ V_CC = 3.3V, CL = 30 pF - meets timing budgets for high-speed address/data buffering
Drive Strength	±12 mA @ V_CC = 3.0V - sufficient to drive 10+ LVTTL loads or 50Ω transmission lines
Power-Off Behavior	High-impedance inputs/outputs - prevents back-driving and leakage when V_CC = 0V
ESD Rating	>2000V HBM - enhances reliability in handling-sensitive industrial assembly environments

Pinout & Package

74VCX162827MTD is housed in a 56-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, 6.1 mm wide, with exposed thermal pad (not electrically connected). Pin pitch is 0.5 mm.

Pin/Terminal	Circuit Role	Design Meaning
OEn (OE1–OE4)	Active-Low Output Enable (NOR logic per byte)	Two independent 10-bit sections: OE1/OE2 control O0–O9; OE3/OE4 control O10–O19 - enables partial bus gating
I0–I19	Buffer Input	20 single-ended CMOS inputs tolerant to 3.6V regardless of V_CC; no external pull-ups required for static hold
O0–O19	Non-Inverting 3-STATE Output with 26Ω Series Resistor	Each output includes monolithic 26Ω resistor - eliminates need for discrete series termination components
V_CC, GND	Power Supply Pins	Dual V_CC/GND pairs (Pins 1/28 and 29/56) minimize switching noise and improve PSRR

Key Features

Feature	Design Value
Byte-Controlled 3-STATE Architecture	Independent OE1/OE2 and OE3/OE4 allow selective disabling of either 10-bit segment - critical for multi-bank memory or split-address decoding
Integrated 26Ω Output Termination	Reduces PCB component count and layout area; mitigates signal integrity issues without external resistors
3.6V-Tolerant I/O at Any V_CC	Enables interoperability between 1.8V, 2.5V, and 3.3V domains without voltage translators
Power-Off High-Impedance	Guarantees bus isolation during power sequencing or hot-swap events - prevents system lockup
Patented Noise/EMI Reduction	Slower edge rates and internal filtering lower radiated emissions - aids CE/FCC compliance in dense layouts

Applications

Memory Address Buffering	Low-Voltage Bus Transceiver
Use Scenario: Driving 20-bit address lines from a low-voltage microcontroller to multiple SRAM or Flash devices in portable embedded systems. IC Role / Device Role / Timing Role: Non-inverting buffer with 3-STATE control isolates CPU address bus during DMA cycles or peripheral access. Use Value: 26Ω series resistors suppress ringing on parallel address traces; 3.6V tolerance allows direct interface to 3.3V memories even when MCU runs at 1.8V.	Use Scenario: Bidirectional data bus isolation between two voltage domains (e.g., 1.8V FPGA and 3.3V peripheral ASIC) using external direction control. IC Role / Device Role / Timing Role: Unidirectional line driver enabling clean signal transfer with controlled slew rate and termination. Use Value: Eliminates need for discrete 26Ω resistors per line; ±12 mA drive supports fanout to 8–10 LVTTL loads at 3.0V V_CC.
Clock Distribution Fanout	Hot-Swappable Backplane Interface
Use Scenario: Distributing a low-skew clock signal to multiple synchronous peripherals in industrial PLC modules. IC Role / Device Role / Timing Role: Low-propagation-delay (3.4 ns max), low-skew (<0.75 ns) buffer ensuring tight timing margins across 20 outputs. Use Value: Integrated 26Ω resistors dampen clock edge overshoot; t_OSLH/t_OSHL spec guarantees inter-output skew ≤0.75 ns @ 1.8V.	Use Scenario: Interfacing hot-pluggable daughter cards to a main backplane where power sequencing must avoid bus contention. IC Role / Device Role / Timing Role: 3-STATE buffer with power-off high-Z ensures outputs float safely before V_CC ramps. Use Value: IOFF leakage <10 µA at 0V V_CC prevents back-powering; OE pull-up guidance (Note 1) enables robust live-insertion design.

Memory Address Buffering

Low-Voltage Bus Transceiver

Use Scenario: Driving 20-bit address lines from a low-voltage microcontroller to multiple SRAM or Flash devices in portable embedded systems.

IC Role / Device Role / Timing Role: Non-inverting buffer with 3-STATE control isolates CPU address bus during DMA cycles or peripheral access.

Use Value: 26Ω series resistors suppress ringing on parallel address traces; 3.6V tolerance allows direct interface to 3.3V memories even when MCU runs at 1.8V.

Use Scenario: Bidirectional data bus isolation between two voltage domains (e.g., 1.8V FPGA and 3.3V peripheral ASIC) using external direction control.

IC Role / Device Role / Timing Role: Unidirectional line driver enabling clean signal transfer with controlled slew rate and termination.

Use Value: Eliminates need for discrete 26Ω resistors per line; ±12 mA drive supports fanout to 8–10 LVTTL loads at 3.0V V_CC.

Clock Distribution Fanout

Hot-Swappable Backplane Interface

Use Scenario: Distributing a low-skew clock signal to multiple synchronous peripherals in industrial PLC modules.

IC Role / Device Role / Timing Role: Low-propagation-delay (3.4 ns max), low-skew (<0.75 ns) buffer ensuring tight timing margins across 20 outputs.

Use Value: Integrated 26Ω resistors dampen clock edge overshoot; t_OSLH/t_OSHL spec guarantees inter-output skew ≤0.75 ns @ 1.8V.

Use Scenario: Interfacing hot-pluggable daughter cards to a main backplane where power sequencing must avoid bus contention.

IC Role / Device Role / Timing Role: 3-STATE buffer with power-off high-Z ensures outputs float safely before V_CC ramps.

Use Value: IOFF leakage <10 µA at 0V V_CC prevents back-powering; OE pull-up guidance (Note 1) enables robust live-insertion design.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 20-bit buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC16244ADGGR	No integrated 26Ω resistors; 3.6V I/O tolerance only at V_CC ≥ 2.3V; 16-bit (not 20-bit)	Lacks built-in termination - requires external resistors for signal integrity; smaller channel count	Select if board space permits discrete termination and 16-bit width suffices
74ALVC162827T	Same 20-bit function and pinout; higher V_CC range (1.65–3.6V); no 26Ω resistors; lower drive (±8 mA @ 3.0V)	Requires external termination; less drive capability limits fanout in noisy environments	Choose when legacy ALVC compatibility is required and termination is added externally

Compared with SN74LVC16244ADGGR and 74ALVC162827T, the 74VCX162827MTD uniquely combines 20-bit width, integrated 26Ω termination, full 1.4–3.6V operation, and 3.6V I/O tolerance - reducing BOM count and improving signal integrity in space-constrained, multi-voltage systems.

Availability

74VCX162827MTD is available at Aetrix Electronics and suitable for memory subsystems, low-voltage bus interfaces, clock distribution networks, and hot-swappable module interconnects requiring stable component supply and long-term industrial availability.

Supply support for 74VCX162827MTD 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 manufacturer acquired by ON Semiconductor in 2016; its VCX logic family remains widely deployed in industrial and communications infrastructure.

The VCX series was engineered for ultra-low-voltage operation (down to 1.4V) with robust I/O tolerance and integrated signal integrity features - targeting portable, battery-powered, and mixed-voltage digital systems.

FAQ

What is the minimum V_CC required for reliable operation of the 74VCX162827MTD?

The 74VCX162827MTD is fully specified down to 1.4V V_CC, with guaranteed DC and AC performance including ±1 mA drive strength and 16.4 ns max propagation delay at 1.4V–1.6V. Below 1.4V, functionality is not assured per datasheet limits.

Does the 74VCX162827MTD require external pull-up resistors on OE pins?

Yes - per Note 1 in the datasheet, OE pins should be tied to V_CC via a pull-up resistor during power-up/down to ensure high-impedance state. Minimum resistance depends on driver sourcing capability; typical values range from 4.7 kΩ to 10 kΩ for standard CMOS drivers.

Can the 74VCX162827MTD drive a 50Ω transmission line directly?

Yes - the integrated 26Ω series resistor, combined with typical PCB trace impedance (~50Ω), forms a near-ideal source termination network. When driving a 50Ω load, this yields ~26Ω source + ~50Ω load ≈ 76Ω total, minimizing reflections for moderate-length traces (≤10 cm).

How does the 74VCX162827MTD behave when V_CC = 0V?

At V_CC = 0V, the 74VCX162827MTD enters power-off mode: all inputs and outputs enter high-impedance state with IOFF leakage <10 µA (per datasheet), preventing back-driving or loading of powered circuitry - essential for hot-swap and power-gating applications.

Is the 74VCX162827MTD pin-compatible with other 20-bit buffers like the 74VCX16244?

No - the 74VCX162827MTD uses a unique 56-pin TSSOP (MTD56) footprint with dedicated OE1–OE4 and 20 I/O pairs. The 74VCX16244 is a 48-pin device with different pin mapping and byte-enable structure; PCB redesign is required for substitution.

74VCX162827MTD Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74VCX

Package/Case:: 56-TFSOP (0.240", 6.10mm Width)

Packaging:: Tube

Product Status:: Obsolete

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 2

Number of Bits per Element:: 10

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:: 56-TSSOP

74VCX162827MTD FAQ

1.How can I place an order for 74VCX162827MTD through Aetrix?

Please submit a Request for Quotation (RFQ) for 74VCX162827MTD 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 74VCX162827MTD reliable?

The price and inventory of 74VCX162827MTD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VCX162827MTD is usually 5 days.

3.What payment methods are accepted for 74VCX162827MTD?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VCX162827MTD transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74VCX162827MTD?

74VCX162827MTD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74VCX162827MTD 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 74VCX162827MTD?

For technical support, including 74VCX162827MTD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VCX162827MTD requirements.

6.How does Aetrix verify that 74VCX162827MTD is sourced from the original manufacturer or authorized distributors?

All 74VCX162827MTD 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 74VCX162827MTD meets industry standards.

7.What is the process for return or replacement of 74VCX162827MTD?

All 74VCX162827MTD units undergo pre-shipment inspection (PSI). If there is an issue with 74VCX162827MTD, 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 74VCX162827MTD part is unused and in its original packaging.

Return procedure for 74VCX162827MTD:

1.Submit a request within 90 days.

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

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