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

onsemi 74LVTH16652MTDX

Name: 74LVTH16652MTDX
Brand: onsemi
SKU: 74LVTH16652MTDX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LVTH16652MTDX

Manufacturer:: onsemi

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: 74LVTH16652MTDX.pdf

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

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Product details

Overview

74LVTH16652MTDX from Fairchild Semiconductor is a low-voltage 16-bit transceiver/register with 3-STATE outputs, designed for bidirectional data flow between A and B buses in mixed-voltage systems. It features bushold inputs (eliminating external pull-ups), ±32 mA/64 mA drive capability, and operates at 2.7–3.6 V while interfacing with 5 V TTL logic. It supports real-time or registered data transfer in industrial backplanes and memory expansion subsystems.

For engineers reviewing the 74LVTH16652MTDX datasheet, pinout, applications, or equivalent options, key selection criteria include bus isolation timing (tPZL ≤ 5.8 ns), dual-clock control (CPABn/CPBAn), independent byte-level select (SABn/SBAn), and live-insertion support for hot-swap board designs.

Technical Context

The 74LVTH16652MTDX integrates sixteen D-type flip-flops with multiplexed transceiver logic, enabling simultaneous real-time and registered data routing between two 16-bit buses. Its bushold inputs maintain stable logic states on unused pins without external biasing, and its BiCMOS process delivers ABT-class speed (fMAX = 150 MHz) with LVTTL power efficiency.

Control is implemented via separate OEABn/OEBAn (output enable), CPABn/CPBAn (clock), and SABn/SBAn (select) inputs per byte group. The device supports four fundamental modes: real-time A↔B transfer, stored-A-to-B + stored-B-to-A concurrent operation, isolated storage per bus, and selective register loading - all without requiring external latching or glue logic.

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Range	2.7 V to 3.6 V - Enables direct integration into 3.3 V systems while tolerating 5 V input signals.
IOH/IOL Drive	−32 mA / +64 mA - Supports driving heavy capacitive loads or multiple TTL inputs without buffer amplification.
fMAX	150 MHz - Allows use in high-speed address/data multiplexing for SRAM, Flash, or FPGA configuration interfaces.
tPZL/tPHZ	1.0–5.8 ns - Ensures fast, glitch-free bus enable/disable during dynamic reconfiguration or power sequencing.
VIH/VIL	2.0 V / 0.8 V - Guarantees reliable 5 V TTL signal recognition at 3.3 V supply, eliminating level-shifter requirements.
Bushold Current	±75 µA at VI = 0.8 V/2.0 V - Maintains valid logic state on floating inputs, removing need for 10 kΩ pull-up/down resistors.
ICCZ	0.19 mA (outputs disabled) - Minimizes standby current in multi-device bus architectures during idle cycles.

Pinout & Package

74LVTH16652MTDX is packaged in a 56-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, 6.1 mm wide, with 0.5 mm lead pitch and exposed thermal pad (not electrically connected).

Pin/Terminal	Circuit Role	Design Meaning
A0–A15	Data Register A Inputs / 3-STATE Outputs	Bi-directional I/O port for Bus A; driven by internal register or passed through in real-time mode.
B0–B15	Data Register B Inputs / 3-STATE Outputs	Bi-directional I/O port for Bus B; synchronized with CPABn/CPBAn and controlled by SABn/SBAn.
CPABn, CPBAn	Low-to-HIGH Clock Inputs	Edge-triggered clocks that load data from A/B buses into respective registers on rising edge only.
SABn, SBAn	Select Inputs	Configure data path: real-time pass-through, stored-A-to-B, stored-B-to-A, or concurrent dual-register transfer.
OEABn, OEBAn	Active-Low Output Enable	Independently disable A→B or B→A output drivers to isolate buses or implement time-multiplexed arbitration.

Key Features

Feature	Design Value
Bushold inputs	Eliminates external pull resistors on all 32 data pins, reducing BOM count and PCB area in dense bus layouts.
Live insertion/extraction	Power-up/down high-impedance behavior prevents bus contention during hot-plug events in modular backplane systems.
5 V tolerant inputs	Accepts 0–5.5 V input signals at VI while operating from 3.3 V supply, enabling direct interface to legacy TTL peripherals.
Dual-byte control	Independent SABn/SBAn and OEABn/OEBAn per 8-bit half enables asymmetric bus management (e.g., A[0:7] registered, A[8:15] real-time).
Output drive asymmetry	+64 mA sink / −32 mA source allows robust LOW-state signaling across long traces or unterminated stubs in point-to-point links.

Applications

Memory Expansion Interface	Industrial Backplane Data Router
Use Scenario: Expanding local memory space in microcontroller-based PLC modules using external SRAM or Flash devices. IC Role / Device Role / Timing Role: Bidirectional data transceiver and register between MCU data bus and memory device data bus, with clock-controlled latch synchronization. Use Value: Eliminates need for discrete latches and level shifters; bushold inputs prevent floating states during memory access gaps, improving system reliability.	Use Scenario: Routing time-critical sensor data between fieldbus controllers and centralized I/O processing units in modular automation racks. IC Role / Device Role / Timing Role: Registered transceiver providing deterministic latency (tPLH ≤ 5.6 ns) and bus isolation between hot-swappable slot controllers. Use Value: Live-insertion support enables maintenance without rack shutdown; independent OEABn/OEBAn allow dynamic bus arbitration during fault recovery.
FPGA Configuration Bridge	Legacy Peripheral Adapter
Use Scenario: Interfacing FPGA configuration memory (e.g., SPI Flash) to a 3.3 V FPGA core while maintaining compatibility with 5 V test equipment. IC Role / Device Role / Timing Role: Voltage-tolerant transceiver buffering configuration data stream, with register capability to align burst reads to FPGA clock domain. Use Value: 5 V input tolerance avoids level-shifting ICs; tW ≥ 3.3 ns pulse width ensures reliable capture of slow programming clock edges.	Use Scenario: Connecting modern 3.3 V SoC hosts to legacy 5 V parallel peripherals such as printers, displays, or industrial DACs. IC Role / Device Role / Timing Role: Bidirectional voltage-translating transceiver with register hold function to decouple host and peripheral timing domains. Use Value: Bushold inputs prevent glitches when peripheral is disconnected; ±32 mA/64 mA drive ensures signal integrity over 15 cm ribbon cables.

Memory Expansion Interface

Industrial Backplane Data Router

Use Scenario: Expanding local memory space in microcontroller-based PLC modules using external SRAM or Flash devices.

IC Role / Device Role / Timing Role: Bidirectional data transceiver and register between MCU data bus and memory device data bus, with clock-controlled latch synchronization.

Use Value: Eliminates need for discrete latches and level shifters; bushold inputs prevent floating states during memory access gaps, improving system reliability.

Use Scenario: Routing time-critical sensor data between fieldbus controllers and centralized I/O processing units in modular automation racks.

IC Role / Device Role / Timing Role: Registered transceiver providing deterministic latency (tPLH ≤ 5.6 ns) and bus isolation between hot-swappable slot controllers.

Use Value: Live-insertion support enables maintenance without rack shutdown; independent OEABn/OEBAn allow dynamic bus arbitration during fault recovery.

FPGA Configuration Bridge

Legacy Peripheral Adapter

Use Scenario: Interfacing FPGA configuration memory (e.g., SPI Flash) to a 3.3 V FPGA core while maintaining compatibility with 5 V test equipment.

IC Role / Device Role / Timing Role: Voltage-tolerant transceiver buffering configuration data stream, with register capability to align burst reads to FPGA clock domain.

Use Value: 5 V input tolerance avoids level-shifting ICs; tW ≥ 3.3 ns pulse width ensures reliable capture of slow programming clock edges.

Use Scenario: Connecting modern 3.3 V SoC hosts to legacy 5 V parallel peripherals such as printers, displays, or industrial DACs.

IC Role / Device Role / Timing Role: Bidirectional voltage-translating transceiver with register hold function to decouple host and peripheral timing domains.

Use Value: Bushold inputs prevent glitches when peripheral is disconnected; ±32 mA/64 mA drive ensures signal integrity over 15 cm ribbon cables.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit registered transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC16652DGGR	Lower drive (±24 mA), no bushold, 1.65–3.6 V VCC range, no 5 V input tolerance.	Requires external pull resistors and level shifters for 5 V interfaces; suited for pure 3.3 V or 2.5 V systems only.	Select when cost and power are prioritized over mixed-voltage interoperability and board space.
74ALVCH16652GR	Higher speed (fMAX = 200 MHz), same bushold and 5 V tolerance, but higher ICCZ (0.5 mA) and tighter layout constraints.	Better for ultra-low-latency interconnects (e.g., high-speed test instrumentation), but increases static power in always-on modules.	Select when propagation delay < 4 ns is mandatory and thermal budget permits higher quiescent current.

Compared with SN74LVC16652DGGR and 74ALVCH16652GR, the 74LVTH16652MTDX uniquely balances 5 V interface robustness, bushold simplicity, and sub-5 ns enable timing - making it optimal for industrial upgrades where legacy compatibility and reliability outweigh raw speed or minimum power.

Availability

74LVTH16652MTDX is available at Aetrix Electronics and suitable for memory expansion interfaces, industrial backplane data routing, FPGA configuration bridges, and legacy peripheral adapters requiring stable component supply across extended product lifecycles.

Supply support for 74LVTH16652MTDX 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 leading analog and mixed-signal IC manufacturer, acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed in industrial and automotive infrastructure.

The 74LVTH16652MTDX belongs to Fairchild's LVTH (Low-Voltage TTL Hybrid) family, engineered for seamless migration from 5 V TTL systems to 3.3 V domains while preserving signal integrity, timing margins, and board-level compatibility.

FAQ

What is the maximum clock frequency supported by the 74LVTH16652MTDX?

The 74LVTH16652MTDX supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 3.3 V ± 0.3 V, TA = −40°C to +85°C). This specification applies to both CPABn and CPBAn inputs and is validated with CL = 50 pF and RL = 500 Ω loads. The 74LVTH16652MTDX achieves this performance using advanced BiCMOS technology, matching the speed of 5 V ABT logic while operating at 3.3 V.

Does the 74LVTH16652MTDX require external pull-up resistors on unused inputs?

No, the 74LVTH16652MTDX does not require external pull-up resistors on unused inputs due to its integrated bushold circuitry. Each data input (A0–A15, B0–B15) maintains its last-valid logic state with ±75 µA holding current at VI = 0.8 V or 2.0 V. This feature eliminates BOM components and PCB routing overhead, and is explicitly confirmed in the Fairchild DS012024 datasheet for the 74LVTH16652MTDX.

Can the 74LVTH16652MTDX interface directly with 5 V TTL logic?

Yes, the 74LVTH16652MTDX supports direct interface with 5 V TTL logic: its inputs tolerate up to 5.5 V regardless of VCC (2.7–3.6 V), and VIH is specified at 2.0 V min - compatible with standard TTL HIGH thresholds. The 74LVTH16652MTDX uses BiCMOS input stages to achieve this, enabling mixed-voltage system design without external level shifters, as documented in the Absolute Maximum Ratings and DC Electrical Characteristics tables.

What package type is used for the 74LVTH16652MTDX?

The 74LVTH16652MTDX is supplied in a 56-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, with 6.1 mm body width and 0.5 mm lead pitch. This package is identified by Fairchild as MTD56 and is distinct from the SSOP variant (MS56A). The "X" suffix in 74LVTH16652MTDX denotes tape-and-reel packaging for automated assembly, per Fairchild's ordering code convention.

How does the 74LVTH16652MTDX handle bus isolation during power-up or power-down?

The 74LVTH16652MTDX provides glitch-free bus loading during power transitions via power-up/down high-impedance outputs. When VCC is between 0–1.5 V, the 3-STATE outputs remain in high-impedance state (IPU/PD ≤ ±100 µA), preventing contention on shared buses. This behavior is guaranteed across temperature and is critical for hot-swap and fail-safe system designs - a key feature highlighted in the datasheet's Features section for the 74LVTH16652MTDX.

74LVTH16652MTDX Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74LVTH

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Logic Type:: Transceiver, Non-Inverting

Number of Elements:: 2

Number of Bits per Element:: 8

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 32mA, 64mA

Voltage - Supply:: 2.7V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 56-TSSOP

74LVTH16652MTDX FAQ

1.How can I place an order for 74LVTH16652MTDX through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVTH16652MTDX 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 74LVTH16652MTDX reliable?

The price and inventory of 74LVTH16652MTDX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVTH16652MTDX is usually 5 days.

3.What payment methods are accepted for 74LVTH16652MTDX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVTH16652MTDX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LVTH16652MTDX?

74LVTH16652MTDX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVTH16652MTDX 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 74LVTH16652MTDX?

For technical support, including 74LVTH16652MTDX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVTH16652MTDX requirements.

6.How does Aetrix verify that 74LVTH16652MTDX is sourced from the original manufacturer or authorized distributors?

All 74LVTH16652MTDX 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 74LVTH16652MTDX meets industry standards.

7.What is the process for return or replacement of 74LVTH16652MTDX?

All 74LVTH16652MTDX units undergo pre-shipment inspection (PSI). If there is an issue with 74LVTH16652MTDX, 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 74LVTH16652MTDX part is unused and in its original packaging.

Return procedure for 74LVTH16652MTDX:

1.Submit a request within 90 days.

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

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