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Home > Products > Integrated Circuits (ICs) > Logic > Universal Bus Functions

NXP Semiconductors 74ALVCH16501DGG:11

Name: 74ALVCH16501DGG:11
Brand: NXP Semiconductors
SKU: 74ALVCH16501DGG:11
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74ALVCH16501DGG:11

Manufacturer:: NXP Semiconductors

Category:: Universal Bus Functions

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

Datasheet:: 74ALVCH16501DGG:11.pdf

Description:: IC UNIV BUS TXRX 18BIT 56TSSOP

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Product details

Overview

74ALVCH16501DGG:11 from Nexperia is an 18-bit universal bus transceiver with non-inverting 3-state outputs in both A-to-B and B-to-A directions, featuring dual D-type latches/flip-flops, bus hold circuitry, and operation across 1.2 V to 3.6 V supply. It supports transparent, latched, and clocked data flow modes and delivers ±24 mA output drive at 3.0 V for driving 50 Ω transmission lines - used in high-speed bidirectional data buses in industrial computing and embedded control systems.

For engineers reviewing the 74ALVCH16501DGG:11 datasheet, 74ALVCH16501DGG:11 pinout, 74ALVCH16501DGG:11 application, or 74ALVCH16501DGG:11 equivalent, this page provides verified functional mode behavior, TSSOP56 package mapping, bus hold current values, propagation delay (as low as 1.0 ns), and precise OE/LE/CP polarity definitions critical for bus arbitration and power-up sequencing.

Technical Context

The 74ALVCH16501DGG:11 implements two independent 18-bit bidirectional data paths, each controlled by dedicated latch enable (LEAB/LEBA), clock (CPAB/CPBA), and output enable (OEAB active HIGH / OEBA active LOW) inputs. Its dual-mode operation allows simultaneous transparent and edge-triggered transfer - e.g., LEAB HIGH enables real-time A→B pass-through while LEAB LOW + CPAB ↑ captures A-bus data on rising clock edge.

Bus hold circuitry actively maintains valid logic levels on all 36 I/O pins (A0–A17, B0–B17) without external pull-ups, with IBHL = 45 µA (VCC = 2.3 V) and IBHH = −45 µA (VCC = 2.3 V). The device complies with JEDEC JESD8-B and interfaces directly with TTL logic despite CMOS low-power architecture.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	1.2 V to 3.6 V - enables direct interfacing with 1.8 V, 2.5 V, and 3.3 V logic domains without level shifters.
Propagation Delay (tpd)	1.0 ns min (VCC = 2.3–2.7 V) - supports >333 MHz maximum frequency for high-throughput memory or peripheral buses.
Output Drive	±24 mA at VCC = 3.0 V - sufficient to drive 50 Ω transmission lines at 85 °C without signal degradation.
Bus Hold Current	IBHL = 45 µA / IBHH = −45 µA at VCC = 2.3 V - eliminates floating input risk in unconnected or hot-swap bus segments.
Operating Temperature	−40 °C to +85 °C - qualified for industrial-grade embedded systems including programmable logic controllers and test equipment.
Package	TSSOP56 (SOT364-1), 6.1 mm body width - surface-mount compatible with automated assembly and space-constrained PCB layouts.
Input/Output Capacitance	CI = 4.0 pF, CI/O = 8.0 pF - minimizes capacitive loading on high-speed buses and reduces switching noise coupling.

Pinout & Package

TSSOP56 plastic thin shrink small outline package (SOT364-1), 56-pin, 6.1 mm body width, 0.5 mm pitch, lead finish matte tin.

Pin/Terminal	Circuit Role	Design Meaning
1 (OEAB)	A-to-B output enable	Active HIGH control: drives B-bus when HIGH; places B outputs in high-Z when LOW - critical for bus contention avoidance.
2 (LEAB)	A-to-B latch enable	When HIGH: enables transparent A→B path; when LOW + CPAB ↑: latches A-bus data - enables synchronous capture of parallel data.
3,5–6,8–10,12–17,19–21,23–24,26 (A0–A17)	A-side bidirectional I/O	18-bit data port connected to local processor/memory bus; bus hold ensures stable state during tri-state transitions.
4,11,18,25,29,32,39,46,53,56 (GND)	Ground reference	10 dedicated GND pins minimize ground bounce and improve noise immunity in high-speed switching applications.
7,22,35,50 (VCC)	Positive supply	4 distributed VCC pins reduce IR drop and support stable core voltage under dynamic load conditions.
27 (OEBA)	B-to-A output enable	Active LOW control: enables B→A transfer when LOW; disables with HIGH - complementary polarity prevents simultaneous bus drive.
28 (LEBA)	B-to-A latch enable	Symmetric function to LEAB but for reverse direction - allows independent control of bidirectional data staging.
30 (CPBA)	B-to-A clock input	Rising-edge triggered for B→A latching; timing matched to CPAB (tW ≥ 0.7 ns) for deterministic cross-bus synchronization.
31,33–34,36–37,38,40–42,43–45,47–49,51–52,54 (B0–B17)	B-side bidirectional I/O	18-bit peripheral or expansion bus interface; identical electrical specs to A-side for seamless bidirectional protocol handling.
55 (CPAB)	A-to-B clock input	Rising-edge sensitive; minimum pulse width 0.7 ns (VCC = 2.7 V) - supports tight-tolerance clock distribution networks.

Key Features

Feature	Design Value
Universal bus transceiver with D-type latches and flip-flops	Supports three distinct operational modes (transparent, latched, clocked) per direction - simplifies glue logic in FPGA/CPU interconnects.
Active bus hold on all 36 I/O pins	Eliminates need for 36 external pull-up/down resistors, reducing BOM count and PCB area in modular backplane designs.
Wide 1.2 V to 3.6 V supply range	Enables single transceiver to bridge legacy 3.3 V peripherals and modern 1.8 V SoCs without voltage translation ICs.
±24 mA output drive at 3.0 V	Drives terminated 50 Ω lines at 85 °C - ensures signal integrity in high-density backplanes and test instrumentation.
JEDEC JESD8-B compliance	Guarantees interoperability with industry-standard 3.3 V and 2.5 V logic families, including TTL-compatible input thresholds.

Applications

Industrial PLC Backplane Interface	Embedded CPU-to-Peripheral Bridge
Use Scenario: Bidirectional data exchange between a 32-bit ARM Cortex-M7 microcontroller and multiple isolated I/O modules over a 18-bit parallel backplane. IC Role / Device Role / Timing Role: 74ALVCH16501DGG:11 acts as a configurable bus isolator with independent A→B and B→A control, enabling time-multiplexed read/write cycles without bus contention. Use Value: Bus hold prevents floating states during module hot-swap; ±24 mA drive sustains signal integrity across 15 cm backplane traces at 100 MHz.	Use Scenario: Interfacing a 1.8 V FPGA configuration interface with legacy 3.3 V EEPROM and flash memory devices on the same data bus. IC Role / Device Role / Timing Role: 74ALVCH16501DGG:11 serves as a voltage-level agnostic bidirectional translator, leveraging its 1.2–3.6 V supply range to match both sides' logic thresholds. Use Value: Eliminates discrete level shifters; JEDEC JESD8-B compliance ensures reliable communication with 3.3 V memory parts using 1.8 V FPGA I/O.
Automated Test Equipment (ATE) Signal Routing	High-Speed Data Acquisition Front-End
Use Scenario: Multiplexing 18-bit sensor data streams from up to four analog front-end ASICs into a central digitizer ASIC via shared parallel bus. IC Role / Device Role / Timing Role: 74ALVCH16501DGG:11 functions as a low-latency, low-skew bus switch - LEAB/LEBA and CPAB/CPBA enable synchronized sampling across channels. Use Value: 1.0 ns min propagation delay and <5.1 ns max tpd ensure sub-ns timing alignment; 10 GND pins suppress ground bounce-induced measurement error.	Use Scenario: Buffering 18-bit parallel outputs from a 100 MSPS ADC to a downstream FPGA-based digital signal processor with strict setup/hold timing. IC Role / Device Role / Timing Role: 74ALVCH16501DGG:11 operates in transparent mode (LEAB = HIGH) to minimize latency, with OEAB controlling FPGA read strobes. Use Value: tsu = −0.3 ns (VCC = 3.0–3.6 V) and th = 0.4 ns allow direct connection to FPGA I/O with no additional timing margin required.

Industrial PLC Backplane Interface

Embedded CPU-to-Peripheral Bridge

Use Scenario: Bidirectional data exchange between a 32-bit ARM Cortex-M7 microcontroller and multiple isolated I/O modules over a 18-bit parallel backplane.

IC Role / Device Role / Timing Role: 74ALVCH16501DGG:11 acts as a configurable bus isolator with independent A→B and B→A control, enabling time-multiplexed read/write cycles without bus contention.

Use Value: Bus hold prevents floating states during module hot-swap; ±24 mA drive sustains signal integrity across 15 cm backplane traces at 100 MHz.

Use Scenario: Interfacing a 1.8 V FPGA configuration interface with legacy 3.3 V EEPROM and flash memory devices on the same data bus.

IC Role / Device Role / Timing Role: 74ALVCH16501DGG:11 serves as a voltage-level agnostic bidirectional translator, leveraging its 1.2–3.6 V supply range to match both sides' logic thresholds.

Use Value: Eliminates discrete level shifters; JEDEC JESD8-B compliance ensures reliable communication with 3.3 V memory parts using 1.8 V FPGA I/O.

Automated Test Equipment (ATE) Signal Routing

High-Speed Data Acquisition Front-End

Use Scenario: Multiplexing 18-bit sensor data streams from up to four analog front-end ASICs into a central digitizer ASIC via shared parallel bus.

IC Role / Device Role / Timing Role: 74ALVCH16501DGG:11 functions as a low-latency, low-skew bus switch - LEAB/LEBA and CPAB/CPBA enable synchronized sampling across channels.

Use Value: 1.0 ns min propagation delay and <5.1 ns max tpd ensure sub-ns timing alignment; 10 GND pins suppress ground bounce-induced measurement error.

Use Scenario: Buffering 18-bit parallel outputs from a 100 MSPS ADC to a downstream FPGA-based digital signal processor with strict setup/hold timing.

IC Role / Device Role / Timing Role: 74ALVCH16501DGG:11 operates in transparent mode (LEAB = HIGH) to minimize latency, with OEAB controlling FPGA read strobes.

Use Value: tsu = −0.3 ns (VCC = 3.0–3.6 V) and th = 0.4 ns allow direct connection to FPGA I/O with no additional timing margin required.

Equivalent & Alternatives

The following parts are listed as comparable options for similar universal bus transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
74LVC16501DG,118	Lower drive (±24 mA only at VCC ≥ 3.0 V); no bus hold; 1.65–3.6 V range.	Lacks bus hold - requires external pull resistors in floating-bus scenarios; unsuitable for hot-swap or unpowered-module detection.	Select when cost sensitivity outweighs bus stability requirements and system design includes external termination.
SN74ALVTH16501GR	Texas Instruments part; 2.3–3.6 V range; higher ICC (max 100 mA vs. 40 µA typical); different pinout (no OEBA/LEBA symmetry).	Not pin-compatible; requires PCB redesign; lacks bus hold; higher static current impacts battery-powered designs.	Consider only if TI ecosystem lock-in exists and bus hold is not required; verify layout compatibility before migration.

Compared with 74LVC16501DG,118 and SN74ALVTH16501GR, the 74ALVCH16501DGG:11 uniquely combines bus hold, symmetric dual-direction control, and guaranteed ±24 mA drive down to 2.3 V - making it optimal for industrial backplanes where reliability under undefined bus states is mandatory.

Availability

74ALVCH16501DGG:11 is available at Aetrix Electronics and suitable for industrial PLC backplanes, embedded CPU-peripheral bridges, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74ALVCH16501DGG:11 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 leader in discrete, logic, and PowerMOS semiconductors, spun off from NXP's Standard Products division in 2017 and focused on automotive, industrial, computing, and consumer markets.

The 74ALVCH16501DGG:11 belongs to Nexperia's advanced ALVCH logic family, engineered for high-speed bidirectional bus interfacing in space-constrained industrial systems with stringent power and reliability requirements.

FAQ

What is the recommended power-up sequence for 74ALVCH16501DGG:11 to ensure high-impedance outputs?

To guarantee high-impedance outputs during power-up, OEBA must be tied to VCC via a pull-up resistor and OEAB to GND via a pull-down resistor. The minimum resistor value depends on the driver's current-sinking/-sourcing capability - typically 10 kΩ suffices for most industrial drivers. This prevents bus contention before system initialization completes. The 74ALVCH16501DGG:11 datasheet specifies this requirement explicitly in Section 1.

Does 74ALVCH16501DGG:11 support true bidirectional operation without external direction control logic?

Yes - the 74ALVCH16501DGG:11 integrates independent A-to-B and B-to-A control paths with separate OEAB/OEBA, LEAB/LEBA, and CPAB/CPBA inputs. This eliminates need for external direction signals or multiplexers. OEAB (active HIGH) and OEBA (active LOW) are intentionally complementary to prevent simultaneous bus drive, and their polarity is hardwired per the 74ALVCH16501DGG:11 functional diagram.

How does bus hold circuitry in 74ALVCH16501DGG:11 affect system-level ESD robustness?

The bus hold circuitry in 74ALVCH16501DGG:11 actively clamps unused inputs to valid logic levels (IBHL = 45 µA, IBHH = −45 µA at VCC = 2.3 V), reducing susceptibility to ESD-induced glitches during board handling or connector mating. However, it does not replace dedicated ESD protection - the 74ALVCH16501DGG:11 itself has no integrated ESD diodes beyond standard CMOS gate protection, so external TVS devices remain necessary for IEC 61000-4-2 compliance.

Can 74ALVCH16501DGG:11 operate reliably at 1.2 V supply while maintaining full 18-bit functionality?

Yes - the 74ALVCH16501DGG:11 is fully specified from 1.2 V to 3.6 V per Table 5 (Recommended Operating Conditions). At 1.2 V, it retains all 18-bit bidirectional functionality, though maximum frequency drops to 150 MHz and output drive reduces. VIH/VIL thresholds scale with VCC, ensuring correct logic interpretation. This makes the 74ALVCH16501DGG:11 suitable for ultra-low-voltage portable instrumentation.

What is the significance of the ':11' suffix in 74ALVCH16501DGG:11?

The ':11' suffix in 74ALVCH16501DGG:11 denotes a specific tape-and-reel packaging variant per Nexperia's ordering nomenclature - indicating 1000-unit reels with standard moisture sensitivity level (MSL3) handling. It does not indicate a functional revision; all electrical and thermal specifications match the base 74ALVCH16501DGG part number as defined in Rev. 5 (2012) datasheet.

74ALVCH16501DGG:11 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: 74ALVCH

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

Packaging:: Tube

Product Status:: Obsolete

Logic Type:: Universal Bus Transceiver

Number of Circuits:: 18-Bit

Current - Output High, Low:: 24mA, 24mA

Voltage - Supply:: 2.3V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C

Mounting Type:: Surface Mount

Supplier Device Package:: 56-TSSOP

74ALVCH16501DGG:11 FAQ

1.How can I place an order for 74ALVCH16501DGG:11 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74ALVCH16501DGG:11 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 74ALVCH16501DGG:11 reliable?

The price and inventory of 74ALVCH16501DGG:11 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ALVCH16501DGG:11 is usually 5 days.

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74ALVCH16501DGG:11 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74ALVCH16501DGG:11 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 74ALVCH16501DGG:11?

For technical support, including 74ALVCH16501DGG:11 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ALVCH16501DGG:11 requirements.

6.How does Aetrix verify that 74ALVCH16501DGG:11 is sourced from the original manufacturer or authorized distributors?

All 74ALVCH16501DGG:11 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 74ALVCH16501DGG:11 meets industry standards.

7.What is the process for return or replacement of 74ALVCH16501DGG:11?

All 74ALVCH16501DGG:11 units undergo pre-shipment inspection (PSI). If there is an issue with 74ALVCH16501DGG:11, 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 74ALVCH16501DGG:11 part is unused and in its original packaging.

Return procedure for 74ALVCH16501DGG:11:

1.Submit a request within 90 days.

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

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