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NXP Semiconductors 74LVC245APW/AUJ
- Part No.:
- 74LVC245APW/AUJ
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74LVC245APW/AUJ.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,694
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Product details
Overview
74LVC245APW/AUJ from Nexperia is an octal 3-state bus transceiver with bidirectional data flow controlled by DIR and active-low OE pins. It operates from 1.2 V to 3.6 V, supports 5.5 V-tolerant inputs, features Schmitt-trigger inputs for noise immunity, and includes IOFF circuitry for partial power-down protection. It enables level translation between 3.3 V and 5 V domains in embedded control buses.
For engineers reviewing the 74LVC245APW/AUJ datasheet, 74LVC245APW/AUJ pinout, 74LVC245APW/AUJ application, or 74LVC245APW/AUJ equivalent, key selection criteria include its 20-pin TSSOP package, 8-bit bidirectional data path, 6.3 ns max propagation delay at 3.3 V, IOFF-enabled hot-swap capability, and compliance with JEDEC JESD8-7A/5A/C standards.
Technical Context
The 74LVC245APW/AUJ implements a CMOS-based octal transceiver architecture with independent direction (DIR) and output enable (OE) control logic. Its dual-rail input tolerance (up to 5.5 V) and IOFF circuitry allow safe operation during mixed-voltage system power sequencing.
Schmitt-trigger inputs provide hysteresis (typ. 0.3 V at VCC = 3.3 V), enabling robust interfacing with slow-rising signals from legacy TTL or microcontroller GPIOs. The device is specified across -40 °C to +125 °C and supports both functional (1.2–3.6 V) and JEDEC-compliant (1.65–3.6 V) supply ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 1.2 V to 3.6 V - supports low-power IoT nodes and mixed-voltage industrial controllers |
| Input voltage tolerance | Up to 5.5 V - enables direct connection to 5 V microcontrollers without external level shifters |
| Propagation delay | 6.3 ns max at VCC = 3.3 V - ensures timing closure in high-speed 8-bit parallel interfaces |
| IOFF leakage | ±10 μA max at VCC = 0 V - prevents backflow current during hot insertion or partial power-down |
| Operating temperature | -40 °C to +125 °C - qualified for under-hood automotive ECUs and industrial motor drives |
| ESD rating | HBM >2000 V, CDM >1000 V - meets IEC 61000-4-2 Level 3 for board-level robustness |
| Output drive | ±24 mA at VCC = 3.0 V - sufficient to drive 15 pF loads across 10 cm PCB traces |
Pinout & Package
TSSOP20 package (SOT360-1): plastic thin shrink small outline, 20 leads, 4.4 mm body width, 0.65 mm pitch, exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | High = A→B data flow; Low = B→A; determines signal path directionality |
| 2 (VCC) | Positive supply | Primary power rail; must be decoupled locally with 100 nF ceramic capacitor |
| 3–9 (A0–A7) | Port A I/O | Bidirectional data terminals on side A; connect to microcontroller or FPGA data bus |
| 10 (GND) | Ground reference | 0 V return path; requires low-inductance connection to system ground plane |
| 11–18 (B0–B7) | Port B I/O | Bidirectional data terminals on side B; interface with peripheral memory or sensor bus |
| 19 (OE) | Output enable (active LOW) | Drives all outputs to high-impedance when HIGH; synchronizes bus arbitration |
| 20 (VCC) | Positive supply | Duplicate VCC pin for improved power distribution and reduced IR drop |
Key Features
| Feature | Design Value |
|---|---|
| IOFF partial power-down | Automatically disables outputs when VCC = 0 V, eliminating backfeed risk during hot-swap or sleep mode |
| Schmitt-trigger inputs | Provides 0.3 V typical hysteresis at 3.3 V, rejecting noise on long traces or unshielded cables |
| 5.5 V overvoltage tolerant inputs | Accepts 5 V logic signals while powered from 1.8 V or 2.5 V rails-no external clamping needed |
| JEDEC compliance | Fully conforms to JESD8-7A (1.65–1.95 V), JESD8-5A (2.3–2.7 V), and JESD8-C/JESD36 (2.7–3.6 V) |
| Wide temperature range | Guaranteed operation from -40 °C to +125 °C - suitable for engine control units and power inverters |
Applications
| Industrial PLC Backplane Interface | Embedded Microcontroller Expansion Bus |
|---|---|
Use Scenario: Interfacing a 3.3 V ARM Cortex-M7 MCU with legacy 5 V I/O modules on a DIN-rail mounted PLC backplane. IC Role / Device Role / Timing Role: Bidirectional level-translating bus transceiver managing data flow between CPU and field I/O cards. Use Value: Eliminates need for discrete level-shifter ICs; IOFF prevents bus contention during module hot-swap. | Use Scenario: Expanding GPIO count of a battery-powered edge node using an 8-bit parallel SRAM and SPI-to-parallel bridge. IC Role / Device Role / Timing Role: Isolating and buffering the shared data bus between microcontroller and external memory. Use Value: 6.3 ns propagation delay ensures setup/hold timing margins at 25 MHz SRAM access rates. |
| Automotive Body Control Module | Test Equipment Digital Pattern Generator |
Use Scenario: Connecting a 1.8 V automotive SoC to 3.3 V CAN transceiver and LIN gateway ICs within a BCM. IC Role / Device Role / Timing Role: Voltage-level translating transceiver enabling interoperability across mixed-supply subsystems. Use Value: -40 °C to +125 °C rating and 5.5 V input tolerance ensure reliability in under-dash environments. | Use Scenario: Driving multiple DUTs simultaneously from a single pattern generator channel in automated test fixtures. IC Role / Device Role / Timing Role: Fan-out buffer and bus isolator for synchronized digital stimulus delivery. Use Value: 3-state outputs allow time-multiplexed control of up to eight DUTs without signal contention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVCH245APW | Includes bus hold circuitry on all data inputs; otherwise identical pinout, timing, and voltage specs | Eliminates need for external pull-up/down resistors on floating data lines | Select when stable idle-state logic levels are required without external biasing |
| SN74LVC245APWR | Texas Instruments part in same TSSOP-20 package; 1.65–3.6 V only; no IOFF or 5.5 V tolerance | Lacks partial power-down and overvoltage protection; lower ESD rating (HBM 2000 V) | Use only in fully powered, 3.3 V-only systems where cost is primary constraint |
Compared with 74LVCH245APW, the 74LVC245APW/AUJ lacks bus hold but offers identical timing and robustness; versus SN74LVC245APWR, it delivers superior mixed-voltage interoperability and system-level safety via IOFF and 5.5 V tolerance.
Availability
74LVC245APW/AUJ is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and embedded test equipment requiring stable component supply across extended temperature and mixed-voltage operating conditions.
Supply support for 74LVC245APW/AUJ 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 logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74LVC245APW/AUJ belongs to Nexperia's LVC logic family, engineered for low-voltage, high-noise-immunity digital interfacing in space-constrained and thermally demanding applications.
FAQ
What is the maximum clock/data rate supported by the 74LVC245APW/AUJ?
The 74LVC245APW/AUJ does not operate on a clock signal-it is an asynchronous transceiver. Its 6.3 ns maximum propagation delay at 3.3 V supports reliable data transfer up to ~80 MHz in parallel bus configurations, assuming proper PCB layout and load capacitance ≤30 pF. Timing margins must be verified per application using tpd, ten, and tdis values from Table 7.
Does the 74LVC245APW/AUJ support hot-plug operation?
Yes, the 74LVC245APW/AUJ supports hot-plug operation via its IOFF circuitry: when VCC = 0 V, the outputs enter high-impedance state and leakage current is limited to ±10 μA, preventing damaging back-current into powered downstream circuits. This enables safe insertion/removal in live backplanes or modular systems.
Can the 74LVC245APW/AUJ translate between 1.8 V and 5 V logic levels?
Yes-the 74LVC245APW/AUJ accepts 5.5 V-tolerant inputs while operating from a 1.8 V supply, allowing it to receive 5 V signals and output 1.8 V logic levels. However, it cannot drive 5 V outputs; for true bidirectional 1.8 V ↔ 5 V translation, external pull-up resistors or a dedicated level shifter is required on the 5 V side.
What is the function of the duplicate VCC pin (pin 2 and pin 20) on the 74LVC245APW/AUJ?
The 74LVC245APW/AUJ has two VCC pins (2 and 20) to reduce power delivery impedance and improve noise immunity in high-speed operation. Both must be connected to the same supply rail and individually decoupled with 100 nF ceramic capacitors placed as close as possible to each pin-this minimizes simultaneous switching noise and maintains stable core voltage under dynamic load.
Is the 74LVC245APW/AUJ pin-compatible with the 74LVCH245APW?
Yes-the 74LVC245APW/AUJ and 74LVCH245APW share identical pinout, package (TSSOP20), electrical specifications, and timing parameters. The only functional difference is that the LVCH variant includes bus hold circuitry on data inputs (A0–A7, B0–B7), while the LVC version does not. No PCB changes are required for substitution if bus hold is not needed.
74LVC245APW/AUJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 1.2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74LVC245APW/AUJ FAQ
1.How can I place an order for 74LVC245APW/AUJ through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC245APW/AUJ 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 74LVC245APW/AUJ reliable?
The price and inventory of 74LVC245APW/AUJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC245APW/AUJ is usually 5 days.
3.What payment methods are accepted for 74LVC245APW/AUJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC245APW/AUJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC245APW/AUJ?
74LVC245APW/AUJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC245APW/AUJ 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 74LVC245APW/AUJ?
For technical support, including 74LVC245APW/AUJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC245APW/AUJ requirements.
6.How does Aetrix verify that 74LVC245APW/AUJ is sourced from the original manufacturer or authorized distributors?
All 74LVC245APW/AUJ 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 74LVC245APW/AUJ meets industry standards.
7.What is the process for return or replacement of 74LVC245APW/AUJ?
All 74LVC245APW/AUJ units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC245APW/AUJ, 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 74LVC245APW/AUJ part is unused and in its original packaging.
Return procedure for 74LVC245APW/AUJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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