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Nexperia USA Inc. 74ALVCH16245DGG,51
- Part No.:
- 74ALVCH16245DGG,51
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74ALVCH16245DGG,51.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,028
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Product details
Overview
74ALVCH16245DGG,51 from Nexperia is a 16-bit CMOS bus transceiver with dual 8-bit sections, active bus hold on all data I/Os, 3-state outputs, and independent direction (1DIR/2DIR) and output enable (1OE/2OE) controls. It operates from 1.2 V to 3.6 V, supports partial power-down via IOFF, and delivers ±24 mA drive at 3.0 V. It is used in bidirectional data bus interfacing between microcontrollers and peripheral memory or I/O subsystems.
For engineers reviewing the 74ALVCH16245DGG,51 datasheet, 74ALVCH16245DGG,51 pinout, 74ALVCH16245DGG,51 application, or 74ALVCH16245DGG,51 equivalent, key selection criteria include bus hold functionality, dual OE/DIR control granularity, TSSOP48 package compatibility, and IOFF-enabled system-level power sequencing.
Technical Context
This transceiver implements two independent 8-bit bidirectional data paths, each with dedicated direction and output-enable inputs-enabling flexible partitioning as either one 16-bit or two concurrent 8-bit interfaces. Schmitt-trigger inputs tolerate slow signal edges, and the IOFF circuit actively disables outputs during power-down to prevent backflow current.
The 74ALVCH variant integrates bus hold circuitry on all 32 data I/O pins (1A0–1A7, 1B0–1B7, 2A0–2A7, 2B0–2B7), eliminating external pull resistors for floating inputs. It meets JEDEC standards JESD8-7 (1.65–1.95 V), JESD8-5 (2.3–2.7 V), and JESD8C/JESD36 (2.7–3.6 V), and supports operation from –40 °C to +85 °C.
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. |
| Output Drive Current | ±24 mA at VCC = 3.0 V - Sufficient to drive 50 Ω transmission lines at 85 °C, supporting high-speed PCB interconnects. |
| Propagation Delay | 1.0–3.0 ns (VCC = 3.0–3.6 V, CL = 50 pF) - Enables >200 MHz data throughput in synchronous bus applications. |
| Bus Hold Current | IBHH = –75 to –175 μA (HIGH), IBHL = 75 to 150 μA (LOW) at VCC = 3.0 V - Actively maintains valid logic levels on unused I/Os without external components. |
| IOFF Leakage | IOZ ≤ 10 μA - Ensures <10 μA backflow current when VCC = 0 V, critical for hot-swap and multi-rail power sequencing. |
| Input Voltage Tolerance | –0.5 V to VCC + 0.5 V - Allows safe interfacing with 5 V-tolerant systems when VCC ≥ 2.3 V. |
| Operating Temperature | –40 °C to +85 °C - Qualified for industrial-grade embedded control and communications equipment. |
Pinout & Package
TSSOP48 (SOT362-1) package: plastic thin shrink small outline, 48 leads, 6.1 mm body width, 0.5 mm lead pitch, designed for high-density PCB layouts with low inductance VCC/GND pin distribution.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR (Pins 1, 24) | Direction control input | Determines data flow direction per 8-bit section: HIGH = B→A, LOW = A→B. |
| 1OE, 2OE (Pins 48, 25) | Output enable (active LOW) | Asserting LOW enables corresponding 8-bit outputs; HIGH forces high-impedance state. |
| 1A0–1A7 (Pins 47, 46, 44, 43, 41, 40, 38, 37) | Data I/O port A (Section 1) | Bidirectional bus segment with integrated bus hold; connects to controller-side data bus. |
| 1B0–1B7 (Pins 2, 3, 5, 6, 8, 9, 11, 12) | Data I/O port B (Section 1) | Bidirectional bus segment with integrated bus hold; connects to peripheral/memory-side data bus. |
| 2A0–2A7 (Pins 36, 35, 33, 32, 30, 29, 27, 26) | Data I/O port A (Section 2) | Independent second 8-bit bidirectional path; enables concurrent dual-bus operation. |
| 2B0–2B7 (Pins 13, 14, 16, 17, 19, 20, 22, 23) | Data I/O port B (Section 2) | Second peripheral-side bus segment, electrically isolated from Section 1 for noise containment. |
| VCC (Pins 7, 18, 31, 42) | Power supply | Four distributed VCC pins minimize supply inductance and reduce ground bounce in high-speed switching. |
| GND (Pins 4, 10, 15, 21, 28, 34, 39, 45) | Ground reference | Eight GND pins provide low-impedance return paths and improve signal integrity across full 16-bit width. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 8-bit control | Separate 1DIR/1OE and 2DIR/2OE allow asynchronous operation of two bus segments-e.g., CPU ↔ SRAM and CPU ↔ FPGA simultaneously. |
| Integrated bus hold | Eliminates need for 32 external pull-up/down resistors on data lines, reducing BOM count and board area in space-constrained designs. |
| IOFF partial power-down | Outputs automatically enter high-Z when VCC = 0 V, enabling safe insertion/removal in live backplane or modular systems. |
| Schmitt-trigger inputs | Input hysteresis ≥ 0.3 V ensures reliable logic sampling of slow-rising signals (e.g., reset lines, mechanical switch debouncing). |
| MULTIBYTE™ flow-through pinout | Alternating A/B pin arrangement minimizes trace crossovers and simplifies layer routing in dense 16-bit bus layouts. |
Applications
| Microcontroller Bus Expansion | FPGA-to-Peripheral Interface |
|---|---|
Use Scenario: Expanding limited GPIO count of an ARM Cortex-M4 MCU to drive multiple parallel peripherals (ADC, DAC, display controller). IC Role / Device Role / Timing Role: Bidirectional data bridge with direction-controlled flow between MCU data bus and peripheral data buses. Use Value: Enables single MCU to manage three concurrent 8-bit peripherals using only two chip selects and shared address/data lines. |
Use Scenario: Interfacing Xilinx Artix-7 FPGA I/O banks to legacy 3.3 V parallel flash memory and 16-bit LCD controller. IC Role / Device Role / Timing Role: Level-shifting, bus-isolating transceiver with precise timing control for setup/hold compliance. Use Value: Eliminates need for discrete level shifters and pull resistors while meeting tPD < 3.0 ns requirement for 100 MHz flash read cycles. |
| Industrial PLC Backplane | Test Equipment Data Acquisition |
Use Scenario: Isolating and buffering data between hot-swappable I/O modules and central controller in a DIN-rail PLC chassis. IC Role / Device Role / Timing Role: Fault-tolerant bus interface with IOFF protection during module insertion/removal under power. Use Value: Prevents backfeed current into unpowered modules, satisfying IEC 61000-4-2 ESD immunity and safety certification requirements. |
Use Scenario: Routing high-fidelity analog sample data from 16-channel ADC to FPGA-based digital signal processor in automated test equipment. IC Role / Device Role / Timing Role: Low-skew, low-noise data capture buffer with bus hold maintaining last valid sample during FPGA reconfiguration. Use Value: Guarantees no data corruption during FPGA partial reconfiguration windows by holding bus state without external latches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74ALVC16245DGG,51 | No bus hold; overvoltage-tolerant inputs to 5.5 V | Better suited for mixed-voltage systems where 5 V signals may appear on 3.3 V buses | Select when interfacing with legacy 5 V peripherals without external clamping. |
| SN74LVC16245ADGGR | TI part; identical pinout and function but lacks bus hold and IOFF; rated –40 °C to +125 °C | Higher temperature rating enables automotive under-hood use, but requires external pull resistors | Choose for extended-temp environments where bus hold is managed externally or unnecessary. |
Compared with 74ALVC16245DGG,51 and SN74LVC16245ADGGR, the 74ALVCH16245DGG,51 uniquely combines bus hold and IOFF-reducing component count and improving robustness in industrial hot-swap and floating-bus scenarios, at the cost of slightly higher static current.
Availability
74ALVCH16245DGG,51 is available at Aetrix Electronics and suitable for industrial PLC backplanes, FPGA peripheral interfacing, microcontroller bus expansion, and automated test equipment requiring stable component supply and long-term manufacturability.
Supply support for 74ALVCH16245DGG,51 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 delivering high-performance, reliable logic, discrete, and MOSFET solutions optimized for efficiency, miniaturization, and thermal resilience in industrial and consumer electronics.
The 74ALVCH16245 belongs to Nexperia's advanced ALVCH logic family-designed specifically for low-voltage, high-speed bidirectional bus interfacing in space-constrained, thermally demanding embedded systems.
FAQ
Does the 74ALVCH16245DGG,51 support hot-plug operation?
Yes. Its IOFF circuitry disables outputs when VCC = 0 V, preventing damaging backflow current during live insertion or removal in modular systems. This feature is verified per JESD78 Class II.A latch-up testing and supports compliant hot-swap implementations without additional protection circuitry.
How does bus hold affect power consumption in idle states?
Bus hold draws 75–150 μA per pin when holding HIGH and 45–75 μA when holding LOW (at VCC = 3.0 V). Total added quiescent current for all 32 I/Os is ≤4.8 mA-measured and specified in Table 6 under IBHL/IBHH. This is fully accounted for in ICC max (40 μA) when all inputs are static.
Can 1DIR and 2DIR be tied together for unified 16-bit operation?
Yes. Connecting 1DIR and 2DIR allows simultaneous direction control across both 8-bit sections, effectively configuring the device as a single 16-bit transceiver. The datasheet Function Table (Table 3) confirms identical behavior per section, and pin descriptions confirm electrical compatibility.
What is the maximum capacitive load this transceiver can drive reliably?
The device is characterized up to 50 pF load capacitance (Table 9), with propagation delay specified at 3.0 ns typical (VCC = 3.3 V, CL = 50 pF). Driving >50 pF increases tPD nonlinearly and may violate setup/hold margins; for heavier loads, add series termination or reduce trace length per layout guidelines in Nexperia Application Note AN10674.
74ALVCH16245DGG,51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74ALVCH
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tube
- 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:
- 48-TSSOP
74ALVCH16245DGG,51 FAQ
1.How can I place an order for 74ALVCH16245DGG,51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ALVCH16245DGG,51 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 74ALVCH16245DGG,51 reliable?
The price and inventory of 74ALVCH16245DGG,51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ALVCH16245DGG,51 is usually 5 days.
3.What payment methods are accepted for 74ALVCH16245DGG,51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ALVCH16245DGG,51 transactions.
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4.How is shipping managed for 74ALVCH16245DGG,51?
74ALVCH16245DGG,51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ALVCH16245DGG,51 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 74ALVCH16245DGG,51?
For technical support, including 74ALVCH16245DGG,51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ALVCH16245DGG,51 requirements.
6.How does Aetrix verify that 74ALVCH16245DGG,51 is sourced from the original manufacturer or authorized distributors?
All 74ALVCH16245DGG,51 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 74ALVCH16245DGG,51 meets industry standards.
7.What is the process for return or replacement of 74ALVCH16245DGG,51?
All 74ALVCH16245DGG,51 units undergo pre-shipment inspection (PSI). If there is an issue with 74ALVCH16245DGG,51, 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 74ALVCH16245DGG,51 part is unused and in its original packaging.
Return procedure for 74ALVCH16245DGG,51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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