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

onsemi 74VCX16827MTDX

Name: 74VCX16827MTDX
Brand: onsemi
SKU: 74VCX16827MTDX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74VCX16827MTDX

Manufacturer:: onsemi

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: 74VCX16827MTDX.pdf

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

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Product details

Overview

74VCX16827MTDX from Fairchild Semiconductor is a low-voltage 20-bit non-inverting buffer/line driver with 3-STATE outputs, byte-level NOR output enables (OE1–OE4), 3.6V-tolerant I/O, and operation from 1.2V to 3.6V V_CC. It delivers 2.5 ns max propagation delay at 3.3V, ±24 mA drive strength, and supports memory/address bus driving, clock distribution, and parity-carrying bus transceivers in mixed-voltage systems.

For engineers reviewing the 74VCX16827MTDX datasheet, pinout, applications, or equivalent options, key selection criteria include 3.6V I/O tolerance across 1.2–3.6V supply range, byte-wise 3-STATE control, live insertion capability, power-off high-impedance behavior, and ESD robustness (>2000V HBM).

Technical Context

The 74VCX16827MTDX implements twenty independent non-inverting buffers partitioned into two 10-bit bytes, each controlled by dual active-low NOR enables (OE1/OE2 for O0–O9; OE3/OE4 for O10–O19). Outputs enter high-impedance state when any enable in a byte is HIGH, enabling flexible bus arbitration without data corruption during enable transitions.

It uses advanced CMOS process for sub-3 ns propagation delay at 3.3V while maintaining <20 µA quiescent ICC and integrated noise/EMI reduction circuitry. Input leakage is ±5 µA, 3-STATE output leakage ±10 µA, and power-off leakage ≤10 µA - ensuring compatibility with hot-swap and partial-power-down architectures.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.2V to 3.6V - enables direct interface with 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V logic domains without level shifters
I/O Voltage Tolerance	Up to 3.6V - allows safe connection to higher-voltage buses or legacy peripherals while powered at lower V_CC
t_PD (max)	2.5 ns at V_CC = 3.3V, CL = 30 pF - supports >300 MHz bus toggle rates in high-speed address/data paths
I_OH/I_OL	±24 mA at V_CC = 3.0–3.6V - drives 10+ LVTTL loads or 50 Ω transmission lines with minimal signal degradation
Power-off High-Z	Inputs and outputs float to high-impedance when V_CC = 0V - prevents back-driving and ensures system-level isolation during power sequencing
ESD Rating	Human Body Model >2000V - reduces risk of field failure during handling and board assembly

Pinout & Package

74VCX16827MTDX is housed in a 56-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, 6.1 mm wide, with 0.5 mm lead pitch. Thermal and mechanical data per Fairchild Package Number MTD56.

Pin/Terminal	Circuit Role	Design Meaning
OEn (OE1–OE4)	Byte-select 3-STATE enable (active LOW, NOR logic)	Each pair controls 10 outputs: OE1/OE2 → O0–O9; OE3/OE4 → O10–O19 - enables independent bus segment gating
I0–I19	Buffer input terminals	20 single-ended CMOS inputs tolerant to 3.6V regardless of V_CC; support live insertion with no latch-up risk
O0–O19	Non-inverting 3-STATE buffer outputs	Drive-strength configurable via V_CC: ±24 mA @ 3.3V, ±2 mA @ 1.4V - scales current to match system voltage and loading
V_CC, GND	Power and ground supply pins	Multiple V_CC/GND pairs distributed across package - reduce simultaneous switching noise and improve PDN integrity

Key Features

Feature	Design Value
Byte-wise 3-STATE control	Two independent 10-bit sections with dual NOR enables allow selective bus isolation without disabling entire device
3.6V-tolerant I/O at 1.2V V_CC	Eliminates external level translators when interfacing 3.3V peripherals to ultra-low-voltage SoCs or FPGAs
Live insertion support	Power-off high-Z + latch-up immunity (>300 mA) enables hot-plug expansion modules and modular backplanes
Noise/EMI reduction circuitry	Patented edge-rate control minimizes ground bounce and crosstalk in dense PCB layouts with shared return paths

Applications

Memory Address Buffering	Low-Voltage Clock Distribution
Use Scenario: Driving 20-bit address bus between 1.8V microcontroller and 3.3V SRAM/Flash in portable embedded systems. IC Role / Device Role / Timing Role: Non-inverting buffer with 3.6V-tolerant outputs isolates core logic from higher-voltage memory while preserving timing integrity. Use Value: Eliminates need for discrete level shifters; 2.5 ns t_PD ensures setup/hold margins are maintained at 100+ MHz bus speeds.	Use Scenario: Distributing a 50 MHz system clock from a 2.5V PLL to multiple 3.3V peripheral ICs on same board. IC Role / Device Role / Timing Role: Low-skew (<0.5 ns) line driver with matched propagation delays across all 20 outputs. Use Value: Maintains inter-device clock alignment; ±24 mA drive sustains signal integrity over 3-inch FR4 traces with 50 pF load.
Parity Bus Transceiver	Mixed-Voltage Backplane Interface
Use Scenario: Transmitting 8-bit data + 12-bit parity across a 3.3V backplane from a 1.2V ASIC. IC Role / Device Role / Timing Role: Bidirectional bus driver supporting parity generation/checking with independent byte enables for error-handling flow control. Use Value: OE1–OE4 allow dynamic reconfiguration of parity lanes; 3.6V I/O tolerance prevents damage during hot-swap events.	Use Scenario: Interfacing a 1.5V FPGA mezzanine card to a 3.3V carrier board via 56-pin edge connector. IC Role / Device Role / Timing Role: Voltage-agnostic bus translator enabling plug-and-play compatibility across multiple logic families. Use Value: Single-supply operation (1.5V V_CC) with full 3.6V I/O margin simplifies power architecture and reduces BOM count.

Memory Address Buffering

Low-Voltage Clock Distribution

Use Scenario: Driving 20-bit address bus between 1.8V microcontroller and 3.3V SRAM/Flash in portable embedded systems.

IC Role / Device Role / Timing Role: Non-inverting buffer with 3.6V-tolerant outputs isolates core logic from higher-voltage memory while preserving timing integrity.

Use Value: Eliminates need for discrete level shifters; 2.5 ns t_PD ensures setup/hold margins are maintained at 100+ MHz bus speeds.

Use Scenario: Distributing a 50 MHz system clock from a 2.5V PLL to multiple 3.3V peripheral ICs on same board.

IC Role / Device Role / Timing Role: Low-skew (<0.5 ns) line driver with matched propagation delays across all 20 outputs.

Use Value: Maintains inter-device clock alignment; ±24 mA drive sustains signal integrity over 3-inch FR4 traces with 50 pF load.

Parity Bus Transceiver

Mixed-Voltage Backplane Interface

Use Scenario: Transmitting 8-bit data + 12-bit parity across a 3.3V backplane from a 1.2V ASIC.

IC Role / Device Role / Timing Role: Bidirectional bus driver supporting parity generation/checking with independent byte enables for error-handling flow control.

Use Value: OE1–OE4 allow dynamic reconfiguration of parity lanes; 3.6V I/O tolerance prevents damage during hot-swap events.

Use Scenario: Interfacing a 1.5V FPGA mezzanine card to a 3.3V carrier board via 56-pin edge connector.

IC Role / Device Role / Timing Role: Voltage-agnostic bus translator enabling plug-and-play compatibility across multiple logic families.

Use Value: Single-supply operation (1.5V V_CC) with full 3.6V I/O margin simplifies power architecture and reduces BOM count.

Equivalent & Alternatives

The following parts are listed as comparable options for similar buffer/driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC16244ADGGR	16-bit (not 20-bit); 3.6V I/O tolerance; 2.5 ns t_PD at 3.3V; 48-pin TSSOP	Lacks second byte enable pair; no OE3/OE4 - limits independent 10-bit segment control	Choose when only 16-bit buffering needed and space-constrained layout favors smaller footprint
74ALVC16827PAG	20-bit; 3.3V-only V_CC (no 1.2–2.5V support); 2.7 ns t_PD; 56-pin TSSOP	Not 1.2V compatible; lacks 3.6V I/O tolerance - requires strict 3.3V domain isolation	Choose only in pure 3.3V systems where lowest possible propagation skew is prioritized over voltage flexibility

Compared with SN74LVC16244ADGGR and 74ALVC16827PAG, the 74VCX16827MTDX uniquely supports full 20-bit buffering with dual-byte 3-STATE control *and* operation down to 1.2V V_CC while retaining 3.6V I/O tolerance - making it the only option for scalable mixed-voltage bus expansion in battery-powered or multi-rail SoC designs.

Availability

74VCX16827MTDX is available at Aetrix Electronics and suitable for memory subsystems, low-voltage clock trees, and mixed-voltage backplane interfaces requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for 74VCX16827MTDX 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 semiconductor company specializing in analog and power ICs, acquired by ON Semiconductor in 2016. Its VCX logic family emphasized ultra-low-voltage operation with robust I/O tolerance.

The 74VCX16827MTDX belongs to Fairchild's VCX low-voltage logic series, designed specifically for voltage-scalable digital interfaces in portable, battery-operated, and multi-rail embedded systems where power efficiency and interoperability across logic families are critical.

FAQ

What is the minimum operating V_CC for the 74VCX16827MTDX?

The 74VCX16827MTDX operates down to 1.2V V_CC, with specified DC and AC performance including ±100 µA output drive and 30 ns max propagation delay at that voltage. Below 1.2V, functionality is not guaranteed per datasheet specifications, and input thresholds scale with V_CC (e.g., VIH = 0.65 × V_CC at 1.2V).

Does the 74VCX16827MTDX support live insertion?

Yes, the 74VCX16827MTDX supports live insertion and withdrawal per datasheet Note 1. Its power-off high-impedance inputs/outputs, combined with >300 mA latch-up immunity and >2000V HBM ESD rating, prevent bus contention or damage during hot-plug events - provided OE pins are pulled up to V_CC via appropriate resistor during power transitions.

How many independent 3-STATE control groups does the 74VCX16827MTDX have?

The 74VCX16827MTDX has two independent 3-STATE control groups: outputs O0–O9 are controlled by OE1 and OE2 (NOR logic), and outputs O10–O19 are controlled by OE3 and OE4 (NOR logic). This enables granular bus segmentation - for example, enabling address bits A0–A9 while tri-stating A10–A19 during DMA cycles.

What is the maximum capacitive load the 74VCX1627MTDX can drive at 3.3V V_CC?

At 3.3V V_CC, the 74VCX16827MTDX is characterized for CL = 30 pF in AC timing specs (t_PHL/t_PLH ≤ 2.5 ns). While not explicitly rated beyond that, its ±24 mA drive strength supports heavier loads - e.g., 50 pF with ~3.5 ns delay - but designers should verify signal integrity via simulation or measurement for loads exceeding 30 pF.

Is the 74VCX16827MTDX pin-compatible with other 56-pin TSSOP 20-bit buffers?

No, the 74VCX16827MTDX is not pin-compatible with generic 56-pin TSSOP 20-bit buffers. Its pinout - including dual OE pairs (OE1–OE4), distributed V_CC/GND, and specific I/O ordering - is unique to the VCX16827 family. Substitution requires PCB redesign unless the alternative part explicitly states 74VCX16827 pin compatibility in its datasheet.

74VCX16827MTDX Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74VCX

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

Packaging:: Tape & Reel (TR)

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:: 24mA, 24mA

Voltage - Supply:: 1.2V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 56-TSSOP

74VCX16827MTDX FAQ

1.How can I place an order for 74VCX16827MTDX through Aetrix?

Please submit a Request for Quotation (RFQ) for 74VCX16827MTDX 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 74VCX16827MTDX reliable?

The price and inventory of 74VCX16827MTDX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VCX16827MTDX is usually 5 days.

3.What payment methods are accepted for 74VCX16827MTDX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VCX16827MTDX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74VCX16827MTDX?

74VCX16827MTDX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74VCX16827MTDX 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 74VCX16827MTDX?

For technical support, including 74VCX16827MTDX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VCX16827MTDX requirements.

6.How does Aetrix verify that 74VCX16827MTDX is sourced from the original manufacturer or authorized distributors?

All 74VCX16827MTDX 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 74VCX16827MTDX meets industry standards.

7.What is the process for return or replacement of 74VCX16827MTDX?

All 74VCX16827MTDX units undergo pre-shipment inspection (PSI). If there is an issue with 74VCX16827MTDX, 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 74VCX16827MTDX part is unused and in its original packaging.

Return procedure for 74VCX16827MTDX:

1.Submit a request within 90 days.

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

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