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Nexperia USA Inc. 74ALVCH16501DL,118
- Part No.:
- 74ALVCH16501DL,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Universal Bus Functions
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74ALVCH16501DL,118.pdf
- Description:
- IC 18BIT UNVRSL BUS TXRX 56-SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,032
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Product details
Overview
74ALVCH16501DL,118 from Nexperia is an 18-bit universal bus transceiver with dual-directional data flow control, bus hold inputs, and 3-state non-inverting outputs. It supports transparent, latched, and clocked operation modes across 1.2 V to 3.6 V supply, delivers ±24 mA drive at 3.0 V, and features IOFF partial power-down protection. Used in high-density memory expansion and multi-processor interconnects where bidirectional bus isolation and signal integrity are critical.
For engineers reviewing the 74ALVCH16501DL,118 datasheet, 74ALVCH16501DL,118 pinout, 74ALVCH16501DL,118 application, or 74ALVCH16501DL,118 equivalent, this page provides verified functional behavior, TSSOP56 package mapping, timing-critical enable/latch/clock interactions, bus-hold current specs, and real-world substitution guidance - all derived from Nexperia's Rev. 8 (July 2024) product data sheet.
Technical Context
This device implements two independent 18-bit data paths (A↔B), each controlled by dedicated OE/LE/CP signals: OEAB (active HIGH) and OEBA (active LOW) provide asymmetric output enable logic, while LEAB/LEBA and CPAB/CPBA configure latch vs. flip-flop behavior per direction. Bus hold circuitry maintains valid logic states on all 36 data I/Os without external pull-ups.
IOFF functionality disables outputs during partial power-down, blocking backflow current when VCC = 0 V. The design complies with JEDEC JESD8-7/8-5/36 voltage standards and meets HBM >2000 V / CDM >1000 V ESD thresholds, enabling robust operation in mixed-voltage industrial backplanes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.2 V to 3.6 V - enables direct interface with 1.8 V, 2.5 V, and 3.3 V logic domains without level shifters. |
| Data Width | 18-bit bidirectional - supports parallel interfaces for DDR memory buffers, FPGA I/O expansion, and ASIC co-processor buses. |
| Output Drive | ±24 mA at VCC = 3.0 V - drives 50 Ω transmission lines directly at 85 °C, eliminating need for external line drivers in high-speed backplane links. |
| Propagation Delay | 1.0–4.2 ns (VCC = 3.0–3.6 V) - ensures sub-5 ns latency for A↔B data transfer in real-time control loops and synchronous bus arbitration. |
| Bus Hold Current | IBHL = 75–150 μA (LOW), IBHH = −75–−175 μA (HIGH) at VCC = 3.0 V - prevents floating inputs during hot-swap or tri-state transitions without external biasing. |
| IOFF Protection | Active at VCC = 0 V - blocks destructive back-current from live buses into unpowered sections, critical for hot-pluggable modules. |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial automation, telecom infrastructure, and embedded computing environments. |
Pinout & Package
TSSOP56 (SOT364-1) package: plastic thin shrink small outline, 56 leads, 6.1 mm body width, 0.5 mm pitch. Pin 1 index marked; lead finish = SnAgCu (lead-free).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OEAB) | A-to-B output enable | Active HIGH - enables B-side outputs when asserted; sets all Bn pins to high-Z when LOW. |
| 2 (LEAB) | A-to-B latch enable | HIGH = transparent mode; LOW + CPAB edge = latch A-data; LOW + static CPAB = hold A-data. |
| 3,5–6,8–10,12–17,19–21,23–24,26 (A0–A17) | A-bus data I/O | 18 bidirectional data terminals with integrated bus hold - retain last valid state when un-driven. |
| 4,11,18,25,29,32,39,46,53,56 (GND) | Ground reference | 10 dedicated ground pins - minimize ground bounce and ensure stable reference for 36 I/Os and internal logic. |
| 7,22,35,50 (VCC) | Power supply | 4 distributed VCC pins - reduce IR drop and improve noise immunity across wide bus width. |
| 27 (OEBA) | B-to-A output enable | Active LOW - enables A-side outputs when LOW; disables them (high-Z) when HIGH. |
| 28 (LEBA) | B-to-A latch enable | Functionally identical to LEAB but for B→A path - supports independent control of both directions. |
| 30 (CPBA) | B-to-A clock input | Edge-triggered sampling of B-data into A-latch; LOW-to-HIGH transition stores Bn values to An outputs. |
| 31–34,36–38,40–42,44–45,47–49,51–52,54 (B0–B17) | B-bus data I/O | 18 complementary bidirectional terminals mirroring A-side behavior and bus hold capability. |
| 55 (CPAB) | A-to-B clock input | Triggers A→B data capture on LOW-to-HIGH edge when LEAB = LOW; defines synchronous update timing. |
Key Features
| Feature | Design Value |
|---|---|
| Universal bus transceiver mode | Configurable as transparent buffer, latch, or edge-triggered flip-flop per direction - eliminates need for separate glue logic in protocol-agnostic interconnects. |
| Bus hold on all 36 I/Os | Eliminates external pull-up/down resistors on A/B buses - reduces BOM count and PCB area in space-constrained modules. |
| IOFF partial power-down | Prevents back-current flow when VCC = 0 V - enables safe insertion/removal in powered-backplane systems like modular PLCs and server blades. |
| 3-state non-inverting outputs | Ensures signal polarity consistency across bidirectional transfers - avoids inversion errors in address/data multiplexing schemes. |
| JEDEC-compliant voltage operation | Valid across JESD8-7 (1.65–1.95 V), JESD8-5 (2.3–2.7 V), and JESD36 (2.7–3.6 V) - simplifies migration between legacy and modern low-voltage platforms. |
Applications
| Memory Expansion Interface | FPGA-to-ASIC Co-Processor Link |
|---|---|
|
Use Scenario: Bidirectional data transfer between a microcontroller and external SRAM/Flash using shared address/data bus. IC Role / Device Role / Timing Role: Acts as direction-controlled bus isolator with latch capability to decouple CPU timing from memory access latency. Use Value: Enables single-cycle read/write handshaking via OEAB/OEBA toggling and eliminates bus contention during simultaneous access attempts. |
Use Scenario: High-speed parallel communication between FPGA fabric and fixed-function ASIC in real-time signal processing. IC Role / Device Role / Timing Role: Provides synchronized 18-bit data staging with CPAB/CPBA edge-triggered capture - aligning FPGA and ASIC clock domains. Use Value: Achieves deterministic 4.2 ns max propagation delay at 3.3 V, supporting >200 MHz inter-chip data rates without skew compensation. |
| Industrial Backplane Interconnect | Hot-Swappable Module Interface |
|
Use Scenario: Isolating control and status signals across isolated segments of a programmable logic controller (PLC) backplane. IC Role / Device Role / Timing Role: Serves as voltage-level agnostic bus repeater with bus hold maintaining valid states during segment power cycling. Use Value: Maintains bus integrity during partial system resets - prevents spurious writes or corrupted configuration reads during maintenance windows. |
Use Scenario: Enabling safe insertion/removal of I/O modules into live industrial control cabinets. IC Role / Device Role / Timing Role: IOFF circuitry disables outputs before VCC ramp-up/down - preventing short-circuits between live and unpowered modules. Use Value: Eliminates need for mechanical interlocks or complex power sequencing - reduces module replacement time from minutes to seconds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar universal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ALVTH16501GR | TI part; same 18-bit function, but uses different IOFF implementation and lacks bus hold on all inputs. | Requires external pull resistors on unused I/Os; not suitable for floating-bus environments without redesign. | Select only if existing TI ecosystem mandates compatibility and bus hold is managed externally. |
| 74LVC16501ADGG,118 | Nexperia LVC variant; identical pinout and bus hold, but narrower 1.65–3.6 V supply range and lower drive (±24 mA only at 3.3 V). | Cannot operate below 1.65 V - excludes 1.2 V/1.8 V mixed-supply designs supported by ALVCH version. | Choose for cost-sensitive 3.3 V-only systems where ultra-low voltage operation is unnecessary. |
Compared with SN74ALVTH16501GR and 74LVC16501ADGG,118, the 74ALVCH16501DL,118 uniquely combines full 1.2–3.6 V operation, integrated bus hold on all 36 I/Os, and symmetric IOFF protection - making it the only option for robust, voltage-flexible, hot-swap-capable industrial bus interfaces.
Availability
74ALVCH16501DL,118 is available at Aetrix Electronics and suitable for industrial backplane interconnects, FPGA co-processor links, and memory expansion subsystems requiring stable component supply across extended temperature and mixed-voltage conditions.
Supply support for 74ALVCH16501DL,118 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 essential efficiency technologies - delivering high-performance, reliable, and scalable logic, analog, and MOSFET solutions for industrial, automotive, and consumer markets.
The 74ALVCH16501 belongs to Nexperia's advanced ALVCH logic family, engineered specifically for low-voltage, high-speed bidirectional bus interfacing in space- and power-constrained industrial systems.
FAQ
What is the minimum supply voltage required for guaranteed operation of the 74ALVCH16501DL,118?
The device is fully specified down to 1.2 V per Nexperia's Rev. 8 datasheet. At this voltage, static parameters including VIH/VIL thresholds, bus hold currents, and IOFF functionality remain within guaranteed limits. Dynamic performance (e.g., fmax, tpd) degrades predictably but remains functional - no minimum voltage "floor" beyond 1.2 V is required for basic logic operation.
How does the asymmetric output enable logic (OEAB active HIGH, OEBA active LOW) benefit system design?
This arrangement allows independent, conflict-free control of A→B and B→A data flow using standard GPIOs without inverters. For example, OEAB can be driven directly from a processor's GPIO (HIGH = enable), while OEBA connects to an inverted enable signal or open-drain bus - simplifying arbitration logic in master/slave configurations and avoiding race conditions during direction switching.
Can the 74ALVCH16501DL,118 drive 50 Ω transmission lines at 85 °C without external termination?
Yes. The datasheet explicitly specifies "Output drive capability 50 Ω transmission lines at 85 °C" under Features and Benefits. With ±24 mA drive strength at VCC = 3.0 V and controlled output impedance, it meets IEEE Std 1149.1 (JTAG) and similar high-speed parallel interface requirements without series resistors or external drivers - validated across full temperature range.
Is the TSSOP56 (SOT364-1) package RoHS-compliant and lead-free?
Yes. The 74ALVCH16501DL,118 uses SnAgCu (SAC305) lead-free termination per Nexperia's packaging specifications. The SOT364-1 package meets RoHS Directive 2011/65/EU and REACH SVHC requirements, with full compliance documentation available through Nexperia's official product portal and Aetrix Electronics' material declarations.
74ALVCH16501DL,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74ALVCH
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- 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-SSOP
74ALVCH16501DL,118 FAQ
1.How can I place an order for 74ALVCH16501DL,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ALVCH16501DL,118 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 74ALVCH16501DL,118 reliable?
The price and inventory of 74ALVCH16501DL,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ALVCH16501DL,118 is usually 5 days.
3.What payment methods are accepted for 74ALVCH16501DL,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ALVCH16501DL,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ALVCH16501DL,118?
74ALVCH16501DL,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ALVCH16501DL,118 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 74ALVCH16501DL,118?
For technical support, including 74ALVCH16501DL,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ALVCH16501DL,118 requirements.
6.How does Aetrix verify that 74ALVCH16501DL,118 is sourced from the original manufacturer or authorized distributors?
All 74ALVCH16501DL,118 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 74ALVCH16501DL,118 meets industry standards.
7.What is the process for return or replacement of 74ALVCH16501DL,118?
All 74ALVCH16501DL,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74ALVCH16501DL,118, 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 74ALVCH16501DL,118 part is unused and in its original packaging.
Return procedure for 74ALVCH16501DL,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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