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Nexperia USA Inc. 74ALVCH16543DGGY
- Part No.:
- 74ALVCH16543DGGY
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74ALVCH16543DGGY.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,910
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Product details
Overview
74ALVCH16543DGGY from Nexperia is a 16-bit D-type registered transceiver with bus hold inputs, 3-state non-inverting outputs, and dual-directional latch/enable control (A↔B). It operates from 1.65 V to 3.6 V, supports -40 °C to +85 °C ambient, delivers ±24 mA drive at 3.0 V, and features IOFF partial power-down protection. It is used in high-density bidirectional data buses in industrial control backplanes and memory expansion interfaces.
For engineers reviewing the 74ALVCH16543DGGY datasheet, 74ALVCH16543DGGY pinout, 74ALVCH16543DGGY application, or 74ALVCH16543DGGY equivalent, key selection criteria include bidirectional registered flow-through timing, bus hold input retention, TSSOP56 package thermal and routing constraints, and JEDEC-compliant voltage-level interoperability with TTL and low-voltage CMOS systems.
Technical Context
This device implements two independent 8-bit registered transceiver channels (1A/1B and 2A/2B), each with separate A→B and B→A control paths comprising enable (nEAB/nEBA), latch enable (nLEAB/nLEBA), and output enable (nOEAB/nOEBA) inputs. All inputs feature bus hold circuitry eliminating external pull-ups.
Its IOFF functionality disables outputs during power-down to prevent backflow current, while its MULTIBYTE™ flow-through pinout minimizes trace skew across 16-bit data lanes. Propagation delays range from 1.0 ns to 5.1 ns depending on VCC and signal path (e.g., data-to-output vs. latch-enable-to-output).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.65 V to 3.6 V - enables direct interfacing with 1.8 V, 2.5 V, and 3.3 V logic domains without level shifters. |
| Drive Strength | ±24 mA at VCC = 3.0 V - sufficient to drive 50 Ω transmission lines at 85 °C, supporting point-to-point or short-bus signaling. |
| Propagation Delay | 1.0–4.3 ns (VCC = 3.0–3.6 V) - ensures sub-5 ns timing margin for 100+ MHz bus operation with setup/hold compliance. |
| Bus Hold Current | ±75 μA (VCC = 3.0 V) - maintains valid logic state on floating inputs without external resistors, reducing BOM count and board space. |
| IOFF Protection | Active at VCC = 0 V - blocks current flow between powered and unpowered sections of a mixed-supply system, preventing damage during hot-swap or partial power-down. |
| ESD Rating | HBM > 2000 V, CDM > 1000 V - meets industrial handling requirements without additional protection circuitry. |
| Operating Temperature | -40 °C to +85 °C - qualified for extended industrial environments including factory automation and telecom infrastructure. |
Pinout & Package
TSSOP56 (SOT364-1) package: plastic thin shrink small outline, 56 leads, 6.1 mm body width, 0.5 mm lead pitch, 1.2 mm max height. Features eight GND pins (pins 4, 11, 18, 25, 32, 39, 46, 53) and four VCC pins (7, 22, 35, 50) for low-noise power distribution and reduced ground bounce.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A0–1A7, 2A0–2A7 | A-side data I/O | Eight-bit parallel ports for A→B or B→A data transfer; support registered or transparent modes based on control inputs. |
| 1B0–1B7, 2B0–2B7 | B-side data I/O | Eight-bit parallel ports mirroring A-side; physically arranged for flow-through PCB layout to minimize crossing traces. |
| 1OEAB, 2OEAB | A→B output enable (active LOW) | Controls 3-state output drivers on A-side; HIGH forces high-impedance, enabling bus sharing with other devices. |
| 1OEBA, 2OEBA | B→A output enable (active LOW) | Independent enable for B-side drivers; allows asymmetric direction control (e.g., A→B active while B→A tri-stated). |
| 1EAB, 2EAB / 1EBA, 2EBA | A↔B enable (active LOW) | Gates data flow path; LOW permits data transfer when latched or transparent; HIGH blocks all internal propagation. |
| 1LEAB, 2LEAB / 1LEBA, 2LEBA | A↔B latch enable (active LOW) | On LOW-to-HIGH transition, captures and holds input data; subsequent input changes do not affect outputs until next latch event. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 8-bit or single 16-bit configuration | Flexible partitioning supports either two independent 8-bit buses or one coherent 16-bit path via shared control logic. |
| MULTIBYTE™ flow-through pinout | Input/output pairs (e.g., 1A0/1B0, 1A1/1B1) are adjacent on opposite sides of the package, enabling straight-line PCB routing and minimizing skew. |
| Back-to-back register architecture | Each direction includes dedicated D-type registers, allowing simultaneous capture of incoming data while holding previously latched values. |
| Bus hold on all data inputs | Eliminates need for external pull-up/down resistors on unused or unterminated data lines, reducing component count and improving noise immunity. |
| JEDEC-compliant voltage standards | Fully compliant with JESD8-7 (1.65–1.95 V), JESD8-5 (2.3–2.7 V), and JESD8C (2.7–3.6 V), ensuring interoperability across multi-voltage systems. |
Applications
| Industrial Backplane Interface | Memory Expansion Subsystem |
|---|---|
Use Scenario: Bidirectional data transfer between CPU module and peripheral I/O cards in modular PLC chassis. IC Role / Device Role / Timing Role: Registered transceiver providing synchronized, glitch-free data handoff between asynchronous modules using common clock domain and latch strobes. Use Value: Bus hold retains last valid state during card insertion/removal; IOFF prevents backfeed when slot power is sequenced independently. |
Use Scenario: Extending 16-bit SRAM or Flash address/data bus between SoC and off-chip memory bank in embedded controller. IC Role / Device Role / Timing Role: Direction-controlled buffer isolating memory bus from processor during DMA cycles and enabling write-data latching before memory strobe assertion. Use Value: Sub-5 ns propagation delay ensures timing closure at 100 MHz bus speeds; ±24 mA drive sustains signal integrity over 8 cm FR4 traces. |
| Test Equipment Data Acquisition | Communications Protocol Bridge |
Use Scenario: Interfacing FPGA-based digital pattern generator with legacy 16-bit parallel test instrumentation. IC Role / Device Role / Timing Role: Level-translating registered interface synchronizing FPGA I/O (3.3 V) to instrument inputs (2.5 V), with latch enable aligned to sample clock edge. Use Value: Wide 1.65–3.6 V supply range eliminates external level shifters; bus hold preserves test vector state during FPGA reconfiguration pauses. |
Use Scenario: Bridging parallel host processor interface to serial peripheral (e.g., SPI-to-parallel converter) in network appliance control plane. IC Role / Device Role / Timing Role: Bidirectional data shuttle managing command/response handshaking, where A-side connects to host and B-side to protocol engine. Use Value: Independent OE/E/LE controls allow precise arbitration of bus ownership; 3-state outputs prevent contention during protocol state transitions. |
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 |
|---|---|---|---|
| SN74ALVTH16543DGGR | TI part with identical pinout and function but higher drive (±32 mA) and wider VCC range (1.65–3.6 V); lacks bus hold. | Requires external pull resistors on unused inputs; better suited for high-speed, low-capacitance loads. | Select when higher output current or tighter timing margins are required and bus hold is managed externally. |
| 74LVC16543ADGG | Nexperia LVC variant: same TSSOP56 package, but no bus hold, lower drive (±24 mA at 3.3 V only), and no IOFF. | Not suitable for partial-power-down systems; requires clean power sequencing to avoid backfeed. | Choose for cost-sensitive designs where bus hold and IOFF are unnecessary and 3.3 V-only operation is acceptable. |
Compared with SN74ALVTH16543DGGR and 74LVC16543ADGG, the 74ALVCH16543DGGY uniquely combines bus hold, IOFF, and full JEDEC voltage compliance in a single industrial-grade package-enabling robust, low-BOM-count implementation in mixed-supply and hot-swap-capable systems.
Availability
74ALVCH16543DGGY is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory expansion subsystems, test equipment data acquisition, and communications protocol bridges requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for 74ALVCH16543DGGY 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 industrial, automotive, and computing markets.
The 74ALVCH series targets low-voltage, high-speed bidirectional bus interface applications requiring robust noise immunity, power-down safety, and JEDEC-standard interoperability across mixed-voltage systems.
FAQ
What is the purpose of the IOFF feature in the 74ALVCH16543DGGY?
The IOFF (power-off protection) circuit disables all outputs when VCC drops below a threshold, preventing reverse current flow from live bus lines into a powered-down section. This protects downstream components during hot-swap events or partial power-down sequences in multi-rail systems, and is fully specified per JEDEC JESD78.
Can the 74ALVCH16543DGGY operate reliably at 1.8 V supply?
Yes. The device is fully specified from 1.65 V to 3.6 V, with static and dynamic parameters guaranteed at 1.8 V (within JESD8-7). Input thresholds scale with VCC, and bus hold remains functional, making it suitable for 1.8 V core logic interfacing without level translation.
How does the bus hold function interact with the latch enable inputs?
Bus hold operates independently on all data inputs (1A0–1A7, 1B0–1B7, etc.) regardless of latch enable state. It maintains the last valid logic level when inputs float, even during transparent mode or while latched data is held-ensuring deterministic behavior during signal glitches or unconnected stubs.
Is the 74ALVCH16543DGGY pin-compatible with older 74ALVC16543 variants?
No. While both are 16-bit registered transceivers in TSSOP56, the 74ALVCH16543DGGY adds bus hold and IOFF circuitry, resulting in different internal pin mapping for control signals and power/ground distribution. Pin compatibility is confirmed only with the exact 74ALVCH16543 family members (e.g., DGG, DGGY, PW).
74ALVCH16543DGGY 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:
- 1.2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-TSSOP
74ALVCH16543DGGY FAQ
1.How can I place an order for 74ALVCH16543DGGY through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ALVCH16543DGGY 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 74ALVCH16543DGGY reliable?
The price and inventory of 74ALVCH16543DGGY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ALVCH16543DGGY is usually 5 days.
3.What payment methods are accepted for 74ALVCH16543DGGY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ALVCH16543DGGY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ALVCH16543DGGY?
74ALVCH16543DGGY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ALVCH16543DGGY 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 74ALVCH16543DGGY?
For technical support, including 74ALVCH16543DGGY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ALVCH16543DGGY requirements.
6.How does Aetrix verify that 74ALVCH16543DGGY is sourced from the original manufacturer or authorized distributors?
All 74ALVCH16543DGGY 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 74ALVCH16543DGGY meets industry standards.
7.What is the process for return or replacement of 74ALVCH16543DGGY?
All 74ALVCH16543DGGY units undergo pre-shipment inspection (PSI). If there is an issue with 74ALVCH16543DGGY, 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 74ALVCH16543DGGY part is unused and in its original packaging.
Return procedure for 74ALVCH16543DGGY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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