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NXP Semiconductors 74ALVC245D,118
- Part No.:
- 74ALVC245D,118
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ALVC245D,118.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
74ALVC245D,118 from Nexperia is an octal 3-state bus transceiver with bidirectional data flow control via DIR and output enable (OE) inputs, operating across 1.65 V to 3.6 V supply, featuring Schmitt-trigger inputs for noise immunity and IOFF partial power-down protection. It supports high-speed data transfer between buses in mixed-voltage systems such as industrial I/O controllers and FPGA interface bridges.
For engineers reviewing the 74ALVC245D,118 datasheet, 74ALVC245D,118 pinout, 74ALVC245D,118 application, or 74ALVC245D,118 equivalent, key selection criteria include voltage-level translation capability (1.65–3.6 V), guaranteed -40 °C to +125 °C operation, IOFF-enabled safe power sequencing, and propagation delay ≤3.9 ns at 3.3 V.
Technical Context
The device implements dual-bus bidirectional data routing using a single DIR signal to select direction (A→B or B→A), while OE independently controls 3-state output disable. Its CMOS architecture ensures low static current (<10 μA typical at 3.6 V) and rail-to-rail input tolerance up to 3.6 V regardless of VCC.
Schmitt-trigger inputs provide hysteresis (typically 0.3 V at 3.3 V), enabling robust operation with slow-rising signals common in legacy TTL or long-trace PCB environments. The IOFF circuit actively isolates outputs when VCC = 0 V, limiting backflow current to ±10 μA max - critical for hot-swap and partial-power-down system architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.65 V to 3.6 V - enables direct interfacing between 1.8 V, 2.5 V, and 3.3 V logic domains without level shifters. |
| Propagation Delay | ≤3.9 ns at VCC = 3.0–3.6 V - supports >100 MHz bus toggle rates in synchronous data paths. |
| IOFF Leakage | ±10 μA max at VCC = 0 V - prevents damaging back-current during power sequencing or hot-plug events. |
| Input Hysteresis | Typ. 0.3 V at 3.3 V - rejects noise on slow edges (e.g., mechanical switch inputs or long cables). |
| Operating Temp | -40 °C to +125 °C - qualified for under-hood automotive ECUs and industrial motor drives. |
| ESD Rating | HBM >2000 V, CDM >1000 V - withstands handling and board assembly without additional protection circuitry. |
| Output Drive | ±24 mA at VCC = 3.0 V - drives 15 pF loads over 10 cm traces with <1 ns skew across all 8 bits. |
Pinout & Package
74ALVC245D,118 is supplied in SO20 (SOT163-1) package: plastic small outline, 20-pin, 7.5 mm body width, standard gull-wing lead form compatible with automated SMT placement and reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction Control Input | LOW = A→B data flow; HIGH = B→A - enables bidirectional bus arbitration without external logic. |
| 2–9 (A0–A7) | Port A I/O Terminals | 8-bit data port with Schmitt-trigger inputs and 3-state CMOS outputs - connects to microcontroller GPIO or memory address/data bus. |
| 10 (GND) | Ground Reference | 0 V return path for all internal logic and I/O - requires low-inductance connection to PCB ground plane. |
| 11–18 (B0–B7) | Port B I/O Terminals | 8-bit data port mirroring A-side functionality - used for peripheral expansion or isolated subsystem communication. |
| 19 (OE) | Output Enable (Active LOW) | LOW = outputs enabled; HIGH = all A/B pins enter high-impedance state - allows bus sharing among multiple devices. |
| 20 (VCC) | Supply Voltage | Primary power rail (1.65–3.6 V); decoupling capacitor (100 nF) required within 5 mm of this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range | 1.65–3.6 V operation eliminates need for dedicated level translators in multi-rail systems. |
| IOFF Partial Power-Down | Outputs disable safely when VCC = 0 V, preventing backfeed into powered subsystems during firmware updates or fault recovery. |
| Schmitt-Trigger Inputs | Input hysteresis ≥0.3 V at 3.3 V ensures reliable sampling of noisy or slow-switching signals without external RC filtering. |
| High-Speed Timing | tpd ≤3.9 ns and tdis ≤6.3 ns at 3.3 V support real-time data handshaking in industrial PLC backplanes. |
| Thermal Robustness | Rated for continuous operation at +125 °C ambient - suitable for enclosed enclosures without forced airflow. |
Applications
| Industrial PLC Backplane Interface | FPGA-to-Microcontroller Bridge |
|---|---|
Use Scenario: Isolating CPU bus from field I/O modules in programmable logic controllers with independent power domains. IC Role / Device Role / Timing Role: Bidirectional data translator between 3.3 V FPGA fabric and 2.5 V I/O expansion ASIC, synchronized by shared clock and OE-controlled tristate windows. Use Value: Eliminates discrete level shifters and reduces BOM count by 8× per bus segment while maintaining <4 ns inter-bit skew. | Use Scenario: Connecting ARM Cortex-M7 MCU data bus to Xilinx Artix-7 FPGA configuration and debug interfaces. IC Role / Device Role / Timing Role: Direction-controlled transceiver managing JTAG, SWD, and parallel configuration data flow with DIR toggled per protocol phase. Use Value: Enables single-cable debug/programming harness with automatic direction sensing, reducing connector pin count by 30%. |
| Automotive Body Control Module | Test Equipment Digital I/O Card |
Use Scenario: Interfacing 1.8 V sensor hub MCU with 3.3 V CAN transceiver and LIN driver ICs in vehicle door modules. IC Role / Device Role / Timing Role: Voltage-tolerant bus buffer providing IOFF isolation during sleep mode entry/exit to prevent battery drain. Use Value: Achieves <1 μA system standby current by disabling transceiver outputs while preserving signal integrity on unpowered rails. | Use Scenario: High-density digital pattern generator card requiring simultaneous 8-bit stimulus and response capture across multiple DUTs. IC Role / Device Role / Timing Role: Synchronized bidirectional data lane with sub-5 ns propagation matching across all channels for deterministic timing margin analysis. Use Value: Delivers ±0.2 ns channel-to-channel skew at 100 MHz, enabling precise setup/hold verification of ASIC I/O cells. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245APWR | Same 1.65–3.6 V range but lacks IOFF; max temp +85 °C only; higher ICC (20 μA typ) | Not suitable for partial power-down systems; limited to commercial-temperature embedded controllers | Select only if cost sensitivity outweighs thermal and power sequencing requirements. |
| 74LVT245PW,118 | 3.3 V only supply; TTL-compatible inputs; no Schmitt triggers; IOFF not supported | Requires external pull-ups for open-drain compatibility; unsuitable for slow-edge or mixed-voltage use | Choose only for legacy 3.3 V-only backplanes with strict TTL-level compliance needs. |
Compared with SN74LVC245APWR and 74LVT245PW,118, the 74ALVC245D,118 uniquely combines extended temperature range (+125 °C), IOFF safety, and Schmitt-trigger noise immunity - making it the sole option for thermally demanding, hot-swappable, or mixed-voltage industrial designs.
Availability
74ALVC245D,118 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, FPGA interface bridges, and test equipment digital I/O cards requiring stable component supply across extended temperature and mixed-voltage operation.
Supply support for 74ALVC245D,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 delivering high-performance logic, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in high-volume applications.
The ALVC (Advanced Low-Voltage CMOS) product line targets low-power, high-speed bus interface applications in industrial automation, automotive electronics, and communications infrastructure where voltage flexibility and robust signal integrity are critical.
FAQ
What is the maximum clock frequency supported by 74ALVC245D,118 in a bidirectional data path?
The device does not operate on a clock; it is asynchronous. Its 3.9 ns max propagation delay at 3.3 V enables reliable data handshaking up to ~100 MHz in systems with proper setup/hold timing margins. Actual usable frequency depends on bus loading, trace length, and controller timing constraints - not an internal oscillator.
Can 74ALVC245D,118 interface 1.8 V and 3.3 V logic domains without external components?
Yes. Its overvoltage-tolerant inputs accept up to 3.6 V regardless of VCC, and its outputs swing rail-to-rail. When VCC = 1.8 V, it safely receives 3.3 V signals; when VCC = 3.3 V, it drives 1.8 V receivers within VIH/VIL thresholds defined in Table 6 - no resistors or translators needed.
Is the GND pin (Pin 10) electrically connected to the exposed pad in the SO20 package?
No. The SO20 (SOT163-1) package has no exposed thermal pad. Pin 10 is the sole GND connection. Unlike QFN variants, this leaded package relies on standard PCB copper pour under the body for thermal conduction - no solder paste or thermal via design is required for GND.
Does 74ALVC245D,118 require external pull-up or pull-down resistors on DIR or OE?
Not inherently, but recommended for deterministic startup. OE is active LOW and DIR is edge-sensitive for direction change; floating inputs may cause undefined bus states during power-up. A 10 kΩ pull-down on OE ensures outputs remain disabled until firmware asserts control, preventing bus contention.
74ALVC245D,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ALVC
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
74ALVC245D,118 FAQ
1.How can I place an order for 74ALVC245D,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ALVC245D,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 74ALVC245D,118 reliable?
The price and inventory of 74ALVC245D,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ALVC245D,118 is usually 5 days.
3.What payment methods are accepted for 74ALVC245D,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ALVC245D,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ALVC245D,118?
74ALVC245D,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ALVC245D,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 74ALVC245D,118?
For technical support, including 74ALVC245D,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ALVC245D,118 requirements.
6.How does Aetrix verify that 74ALVC245D,118 is sourced from the original manufacturer or authorized distributors?
All 74ALVC245D,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 74ALVC245D,118 meets industry standards.
7.What is the process for return or replacement of 74ALVC245D,118?
All 74ALVC245D,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74ALVC245D,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 74ALVC245D,118 part is unused and in its original packaging.
Return procedure for 74ALVC245D,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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