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

Nexperia USA Inc. 74ALVCH16646DGGY

Name: 74ALVCH16646DGGY
Brand: Nexperia USA Inc.
SKU: 74ALVCH16646DGGY
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74ALVCH16646DGGY

Manufacturer:: Nexperia USA Inc.

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: 74ALVCH16646DGGY.pdf

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

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Product details

Overview

74ALVCH16646DGGY from Nexperia is a 16-bit non-inverting bus transceiver/register with 3-state outputs, dual D-type flip-flop registers per data path, and independent A↔B direction control. It operates from 2.3 V to 3.6 V, delivers ±24 mA output drive at 3.0 V, supports real-time and registered data transfer modes, and is used in high-density memory/data bus interface applications requiring bidirectional flow-through architecture.

For engineers reviewing the 74ALVCH16646DGGY datasheet, 74ALVCH16646DGGY pinout, 74ALVCH16646DGGY application, or 74ALVCH16646DGGY equivalent, this device enables multiplexed, clock-synchronized bidirectional data routing between two 16-bit buses while maintaining signal integrity across industrial temperature ranges (−40 °C to +85 °C) and supporting bus-hold on all inputs.

Technical Context

The device integrates two independent 8-bit transceiver/register sections (Section 1 and Section 2), each with dedicated clock (nCPAB/nCPBA), direction (nDIR), output enable (nOE), and select (nSAB/nSBA) controls. Each section implements dual-path register storage-data can be latched from either bus into internal D-flip-flops on LOW-to-HIGH clock transitions, then routed to the opposite bus under direction and select logic.

Its MULTIBYTE™ flow-through pinout minimizes trace skew and crosstalk, while active bus-hold circuitry eliminates external pull-ups on unused data lines. The TSSOP56 package features multiple VCC/GND pairs to suppress ground bounce and noise, enabling reliable operation on 50 Ω transmission lines up to 320 MHz per channel at 3.3 V.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply voltage	2.3 V to 3.6 V - Enables direct interfacing with 2.5 V and 3.3 V logic systems without level translation.
Propagation delay (t_pd)	1.0–3.9 ns - Ensures sub-4 ns timing margin for high-speed synchronous bus transfers at 3.3 V.
Output drive	±24 mA at V_CC = 3.0 V - Sufficient to drive 50 Ω transmission lines directly at 85 °C ambient.
Bus-hold current	I_BHL = 75–150 μA, I_IBHH = −75 to −175 μA - Actively holds floating inputs at valid logic levels without external resistors.
Operating temperature	−40 °C to +85 °C - Qualified for industrial-grade embedded control and communications equipment.
Max clock frequency	320 MHz - Supports high-throughput register-to-bus transfers in real-time data acquisition subsystems.
Input capacitance	3.0 pF - Minimizes capacitive loading on upstream drivers and preserves signal edge rates.

Pinout & Package

TSSOP56 plastic thin shrink small outline package (SOT364-1); 56 leads; body width 6.1 mm; 0.5 mm pitch; exposed thermal pad not present; RoHS-compliant.

Pin/Terminal	Circuit Role	Design Meaning
1A0–1A7, 2A0–2A7	Data I/O (Bus A side)	Primary bidirectional data terminals for Bus A; input when enabled as source, output when enabled as sink.
1B0–1B7, 2B0–2B7	Data I/O (Bus B side)	Primary bidirectional data terminals for Bus B; function mirrors 1A/2A pins with independent control.
1OE, 2OE	Output enable (active-LOW)	Disables all outputs to high-impedance state; must be pulled HIGH via resistor during power-up for safe default.
1DIR, 2DIR	Direction control	Determines data flow direction: LOW = B→A, HIGH = A→B; effective only when nOE = LOW.
1CPAB, 2CPAB	CLK A-to-B	LOW-to-HIGH transition clocks data from Bus A into internal register for later B-bus output.
1CPBA, 2CPBA	CLK B-to-A	LOW-to-HIGH transition clocks data from Bus B into internal register for later A-bus output.
1SAB, 2SAB	Select A-to-B	When HIGH, routes stored A-register data to Bus B; when LOW, passes real-time A-bus data transparently.
1SBA, 2SBA	Select B-to-A	When HIGH, routes stored B-register data to Bus A; when LOW, passes real-time B-bus data transparently.
V_CC (pins 7, 22, 35, 50)	Power supply	Four distributed supply pins reduce IR drop and improve noise immunity across wide operating bandwidth.
GND (pins 4, 11, 18, 25, 32, 39, 46, 53)	Ground reference	Eight ground pins minimize ground loop inductance and suppress simultaneous switching noise.

Key Features

Feature	Design Value
Wide supply range	2.3 V to 3.6 V - Eliminates need for separate voltage regulators in mixed-voltage board designs.
MULTIBYTE™ flow-through pinout	Linear A/B terminal pairing - Reduces PCB routing complexity and inter-layer vias in dense memory interfaces.
Active bus-hold	Holds all data inputs at valid logic levels without external components - Prevents metastability in unconnected or unterminated stubs.
Low-inductance power delivery	Four V_CC and eight GND pins - Limits ground bounce to <150 mV under full 16-bit switching at 3.3 V.
JEDEC compliance	JESD8-5 (2.3–2.7 V), JESD8C/JESD36 (2.7–3.6 V) - Guarantees interoperability with industry-standard logic families.

Applications

Memory Subsystem Interface

Industrial PLC Backplane

Use Scenario: Bidirectional data exchange between microcontroller and SRAM/Flash memory banks with independent read/write strobes.

IC Role / Device Role / Timing Role: Acts as registered bus transceiver to isolate CPU and memory timing domains while synchronizing burst transfers using nCPAB/nCPBA clocks.

Use Value: Enables glitch-free address/data handshaking across asynchronous clock domains with sub-4 ns propagation delay and bus-hold protection on idle cycles.

Use Scenario: Interfacing modular I/O cards to central controller over parallel backplane bus with hot-swap capability.

IC Role / Device Role / Timing Role: Provides isolated, direction-controlled data path between card-local and backplane buses, with nOE-driven high-Z during insertion/removal.

Use Value: Prevents bus contention during module hot-swap via controlled 3-state enable/disable timing (t_en ≤ 5.1 ns, t_dis ≤ 5.3 ns at 3.3 V).

Test Equipment Data Acquisition

High-Speed FPGA Interface

Use Scenario: Capturing parallel sensor data streams (e.g., ADC outputs) into FPGA or DSP with synchronized sampling.

IC Role / Device Role / Timing Role: Registers real-time analog front-end data on nCPBA edges, then forwards to processing unit via nSBA-controlled multiplexing.

Use Value: Achieves deterministic 320 MHz capture-to-transfer latency with zero external latch components and built-in input hold stability.

Use Scenario: Bridging FPGA I/O banks operating at 3.3 V to legacy ASIC peripherals running at 2.5 V logic levels.

IC Role / Device Role / Timing Role: Performs level-shifted, registered bus translation with independent A/B clocking to absorb setup/hold timing skews.

Use Value: Maintains signal integrity across voltage domains using ±24 mA drive strength and 3.0 pF input capacitance, eliminating external buffers.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74ALVTH16646DGGR	TI part with identical 16-bit transceiver/register function but higher drive (±32 mA) and wider V_CC (2.3–3.6 V); no bus-hold circuitry.	Requires external pull-up/down resistors on unused inputs; better suited for low-noise, high-drive point-to-point links.	Select when maximum output current (>24 mA) is required and board space allows discrete bus-hold support.
74LVC16646ADGG	Nexperia LVC variant with same pinout but lower drive (±24 mA at 3.3 V), no bus-hold, and narrower V_CC (1.65–3.6 V).	Lacks active bus-hold; requires careful PCB layout to avoid floating inputs; supports 1.8 V I/O compatibility.	Select when interfacing with 1.8 V logic and bus-hold is managed elsewhere in system design.

Compared with SN74ALVTH16646DGGR and 74LVC16646ADGG, the 74ALVCH16646DGGY uniquely combines integrated bus-hold, JEDEC-compliant multi-voltage operation, and optimized TSSOP56 noise suppression-making it ideal for industrial backplanes where input robustness and EMI resilience are critical.

Availability

74ALVCH16646DGGY is available at Aetrix Electronics and suitable for memory subsystem interfaces, industrial PLC backplanes, test equipment data acquisition, and high-speed FPGA interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74ALVCH16646DGGY 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74ALVCH series targets high-speed, low-power bus interface applications in industrial and communications equipment, emphasizing noise immunity, voltage flexibility, and robust signal integrity in dense PCB environments.

FAQ

What is the purpose of the nSAB and nSBA pins?

The nSAB (Select A-to-B) and nSBA (Select B-to-A) pins control multiplexing between real-time and registered data paths. When nSAB = HIGH, stored data from the A-side register is routed to Bus B; when LOW, live A-bus data passes through transparently. Identical behavior applies to nSBA for B-to-A routing. This enables flexible data staging without external logic.

How does the bus-hold feature operate and what design benefit does it provide?

Bus-hold circuitry actively maintains unused or floating data inputs at their last-valid logic level using weak feedback transistors. It draws 75–150 μA for LOW and −75 to −175 μA for HIGH states. This eliminates the need for external pull-up/pull-down resistors, reduces BOM count, prevents metastability in unterminated stubs, and improves system reliability during power sequencing.

Can both Bus A and Bus B be driven simultaneously?

No. The device enforces strict one-bus-at-a-time driving: only Bus A or Bus B may be actively driven at any moment. This is enforced by internal logic that disables conflicting outputs when direction and enable signals would otherwise cause contention. Attempting simultaneous drive violates functional specification and risks excessive current draw or undefined states.

What is the recommended power-up sequence to ensure high-impedance outputs at startup?

To guarantee outputs remain in high-impedance state during power-up, tie nOE (pins 56 and 29) to V_CC via a pull-up resistor. Minimum resistance is determined by the driver's current-sinking capability; typical values range from 4.7 kΩ to 10 kΩ. This ensures nOE stays HIGH until firmware asserts control, preventing bus contention on power application.

74ALVCH16646DGGY Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: 74ALVCH

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:: 24mA, 24mA

Voltage - Supply:: 2.3V ~ 2.7V, 3V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 56-TSSOP

74ALVCH16646DGGY FAQ

1.How can I place an order for 74ALVCH16646DGGY through Aetrix?

Please submit a Request for Quotation (RFQ) for 74ALVCH16646DGGY 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 74ALVCH16646DGGY reliable?

The price and inventory of 74ALVCH16646DGGY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ALVCH16646DGGY is usually 5 days.

3.What payment methods are accepted for 74ALVCH16646DGGY?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ALVCH16646DGGY transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74ALVCH16646DGGY?

74ALVCH16646DGGY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74ALVCH16646DGGY 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 74ALVCH16646DGGY?

For technical support, including 74ALVCH16646DGGY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ALVCH16646DGGY requirements.

6.How does Aetrix verify that 74ALVCH16646DGGY is sourced from the original manufacturer or authorized distributors?

All 74ALVCH16646DGGY 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 74ALVCH16646DGGY meets industry standards.

7.What is the process for return or replacement of 74ALVCH16646DGGY?

All 74ALVCH16646DGGY units undergo pre-shipment inspection (PSI). If there is an issue with 74ALVCH16646DGGY, 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 74ALVCH16646DGGY part is unused and in its original packaging.

Return procedure for 74ALVCH16646DGGY:

1.Submit a request within 90 days.

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

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