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Nexperia USA Inc. 74ALVC245D,112
- Part No.:
- 74ALVC245D,112
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ALVC245D,112.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,734
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Product details
Overview
74ALVC245D,112 from Nexperia is an octal 3-state bus transceiver with bidirectional data flow controlled by DIR and active-low OE pins, operating across 1.65 V to 3.6 V supply, featuring IOFF partial power-down protection, Schmitt-trigger inputs for noise immunity, and rated for -40 °C to +125 °C in SO20 (SOT163-1) package. It enables level-shifting and bus isolation in high-density digital systems such as industrial PLC I/O modules.
For engineers reviewing the 74ALVC245D,112 datasheet, 74ALVC245D,112 pinout, 74ALVC245D,112 application, or 74ALVC245D,112 equivalent, key selection criteria include its 3.6 V overvoltage-tolerant inputs, 2.3 ns typical propagation delay at 3.3 V, IOFF-enabled hot-swap capability, and compatibility with both TTL and CMOS logic families in mixed-voltage board designs.
Technical Context
The device implements dual-bus bidirectional data transfer via a single DIR control line and independent 3-state output enable (OE), supporting simultaneous A→B or B→A directionality without internal latching. Its IOFF circuit actively disables outputs when VCC = 0 V, blocking backflow current during partial power-down sequences.
Schmitt-trigger inputs ensure robust operation with slow-rising signals (≥10 ns/V transition rate supported), while static input thresholds scale with VCC (VIH = 0.65×VCC min at 1.65 V; 2.0 V min at 3.6 V) and output drive meets ±24 mA at 3.0 V - enabling direct interface with legacy 5 V TTL loads via level translation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.65 V to 3.6 V - supports single-supply operation across 1.8 V, 2.5 V, 3.3 V logic domains without external level shifters. |
| Propagation Delay | 2.3 ns typical (VCC = 3.0–3.6 V) - enables reliable timing in high-speed parallel buses up to ~200 MHz clock-equivalent data rates. |
| IOFF Leakage | ±10 μA max at VCC = 0 V - prevents damaging back-current during hot-insertion or staggered power sequencing in modular systems. |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max at VCC = 3.6 V - ensures clean recognition of TTL-compatible logic levels while maintaining CMOS low-power operation. |
| Output Drive | ±24 mA at VOH ≥ 2.2 V / VOL ≤ 0.55 V (VCC = 3.0 V) - directly drives 50 Ω transmission lines or multiple 74-series inputs without buffering. |
| ESD Rating | HBM > 2000 V, CDM > 1000 V - withstands handling and board-level ESD events common in industrial assembly environments. |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood automotive ECUs, motor drives, and industrial controllers without derating. |
Pinout & Package
74ALVC245D,112 uses the SO20 plastic small outline package (SOT163-1), 20-pin, 7.5 mm body width, with standard 1.27 mm lead pitch and gull-wing leads. Pin 1 index located at top-left corner with notch marking.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | DIR | Direction control: HIGH enables B→A data flow; LOW enables A→B - determines signal path polarity for bidirectional bus arbitration. |
| 2–9 | A0–A7 | Port A data I/O: connects to microcontroller GPIO or ASIC side; inputs when DIR = LOW, outputs when DIR = HIGH. |
| 10 | GND | Ground reference: primary 0 V return for all internal logic and output drivers - must be low-impedance for noise immunity. |
| 11–18 | B0–B7 | Port B data I/O: connects to peripheral bus or memory side; inputs when DIR = HIGH, outputs when DIR = LOW. |
| 19 | OE | Output enable (active LOW): asserts 3-state when HIGH; enables driving when LOW - used for bus contention avoidance. |
| 20 | VCC | Supply voltage: powers all internal logic and output stages - requires local 100 nF ceramic decoupling adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| IOFF Partial Power-down | Blocks reverse current when VCC = 0 V - enables safe insertion/removal in live-backplane systems without disrupting adjacent powered rails. |
| Schmitt-trigger Inputs | 250 mV hysteresis typical - rejects noise on slow-rising control lines (e.g., reset, enable) in electrically noisy industrial enclosures. |
| Overvoltage-Tolerant Inputs | Withstand up to 3.6 V regardless of VCC setting - allows interfacing with higher-voltage peripherals without external clamping diodes. |
| TTL-Compatible Outputs | VOH ≥ 2.4 V / VOL ≤ 0.4 V at 3.3 V supply - directly drives legacy 74LS/74ALS loads without level-shifting components. |
| Wide Temp Range Support | Specified from -40 °C to +125 °C - eliminates need for thermal derating in sealed enclosures or high-ambient motor control applications. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
|
Use Scenario: Isolating microcontroller GPIO from 24 V field-side digital inputs/outputs via optocouplers and level-shifted buses. IC Role / Device Role: Bidirectional data buffer between 3.3 V MCU and 5 V/24 V peripheral bus, managing direction and contention via DIR/OE. Use Value: Eliminates discrete MOSFET switches and pull-up networks, reducing BOM count by 7+ components per channel while maintaining hot-swap safety via IOFF. |
Use Scenario: Interfacing infotainment SoC (1.8 V I/O) with instrument cluster display controller (3.3 V I/O) over shared parallel video/data bus. IC Role / Device Role: Voltage-translating bus transceiver enabling synchronous pixel/data transfer without violating either domain's VIH/VIL margins. Use Value: Achieves <10 ns inter-port skew and <3 ns propagation delay variation across all 8 bits - preserving timing integrity for 60 Hz video frame updates. |
| Test Equipment Backplane | Programmable Logic Carrier Board |
|
Use Scenario: Modular test system where FPGA-based measurement cards plug into a central backplane with shared address/data/control lines. IC Role / Device Role: Hot-plug-safe bus isolator ensuring no backfeed occurs when card is inserted/removed while backplane remains powered. Use Value: IOFF leakage <10 μA at VCC = 0 V prevents false triggering or latch-up in adjacent powered modules during card swap operations. |
Use Scenario: FPGA carrier board hosting multiple mezzanine modules (ADC, DAC, sensor interfaces) sharing a common parallel configuration bus. IC Role / Device Role: Direction-controlled bus repeater allowing host FPGA to read/write module registers while preventing bus contention during multi-drop access. Use Value: 3-state outputs with <1 ns enable/disable skew allow deterministic bus arbitration cycles within 25 ns windows - critical for real-time register polling. |
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 | TI part with identical pinout and 1.65–3.6 V range but lacks IOFF; max temp = +85 °C only. | Not suitable for hot-swap or partial power-down systems requiring back-current blocking. | Select only for cost-sensitive commercial-grade designs where full temperature range and IOFF are non-critical. |
| 74LVC245ABQ,115 | Nexperia DHVQFN20 variant (SOT764-1); same electrical specs but 2.5 × 4.5 mm footprint and thermal pad. | Better thermal performance in space-constrained layouts; requires PCB thermal via design for >125 °C operation. | Prefer for high-density PCBs needing lower profile and improved power dissipation - verify land pattern matches SOT764-1. |
Compared with SN74LVC245APWR, 74ALVC245D,112 adds essential IOFF and extended temperature support for ruggedized systems; versus 74LVC245ABQ,115, it trades compactness for through-hole-compatible SO20 manufacturability and simplified thermal management.
Availability
74ALVC245D,112 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, test equipment backplanes, and programmable logic carrier boards requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74ALVC245D,112 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, analog, and discrete components optimized for efficiency and miniaturization in industrial, automotive, and computing applications.
The 74ALVC series targets low-voltage, high-speed digital interfacing with emphasis on power-down safety, noise immunity, and mixed-voltage interoperability - specifically engineered for next-generation embedded control and modular electronics.
FAQ
Can 74ALVC245D,112 operate with VCC = 1.8 V while interfacing with 3.3 V inputs?
Yes. Its overvoltage-tolerant inputs accept up to 3.6 V regardless of VCC setting, and VIH is specified at 0.65×VCC (1.17 V min at 1.8 V), ensuring reliable recognition of 3.3 V logic HIGH. Output VOH at 1.8 V is 1.25 V min, sufficient to drive downstream 1.8 V receivers.
What is the maximum capacitive load the outputs can drive while maintaining timing specs?
The datasheet specifies dynamic characteristics with 30 pF (1.65–2.7 V) or 50 pF (2.7–3.6 V) loads. At 3.3 V, tpd remains ≤3.4 ns with 50 pF, confirming compatibility with standard PCB traces and multiple CMOS inputs. Exceeding 50 pF increases propagation delay nonlinearly and may require series termination.
Does the IOFF feature require external biasing or control signals?
No. IOFF is fully automatic: when VCC drops to 0 V, internal circuitry forces all outputs into high-impedance state without any action required on DIR or OE. This behavior is guaranteed across -40 °C to +125 °C and requires no external components or firmware intervention.
How does the Schmitt-trigger input improve reliability in noisy factory environments?
Schmitt-trigger inputs provide ~250 mV hysteresis, rejecting transient noise spikes below that threshold. In industrial settings with relay switching or motor commutation, this prevents false edge detection on DIR or OE control lines - eliminating spurious bus direction changes or unintended 3-state activation.
74ALVC245D,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74ALVC
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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,112 FAQ
1.How can I place an order for 74ALVC245D,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ALVC245D,112 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,112 reliable?
The price and inventory of 74ALVC245D,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ALVC245D,112 is usually 5 days.
3.What payment methods are accepted for 74ALVC245D,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ALVC245D,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ALVC245D,112?
74ALVC245D,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ALVC245D,112 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,112?
For technical support, including 74ALVC245D,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ALVC245D,112 requirements.
6.How does Aetrix verify that 74ALVC245D,112 is sourced from the original manufacturer or authorized distributors?
All 74ALVC245D,112 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,112 meets industry standards.
7.What is the process for return or replacement of 74ALVC245D,112?
All 74ALVC245D,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74ALVC245D,112, 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,112 part is unused and in its original packaging.
Return procedure for 74ALVC245D,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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