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Nexperia USA Inc. 74LVC245AD,118
- Part No.:
- 74LVC245AD,118
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74LVC245AD,118.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:45,761
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Product details
Overview
74LVC245AD,118 from Nexperia is an octal 3-state bus transceiver with bidirectional data flow controlled by DIR and output enable (OE) inputs, operating from 1.2 V to 3.6 V supply, supporting mixed-voltage translation between 3.3 V and 5 V systems, featuring Schmitt-trigger inputs for noise immunity and IOFF circuitry for partial power-down protection. It is used in embedded microcontroller I/O expansion, FPGA-to-ASIC interface bridging, and industrial control backplane data routing.
For engineers reviewing the 74LVC245AD,118 datasheet, 74LVC245AD,118 pinout, 74LVC245AD,118 application, or 74LVC245AD,118 equivalent, this device is selected for level-shifting bidirectional buses where low static current (<10 μA at 3.6 V), fast propagation delay (≤6.3 ns at 3.3 V), and robust overvoltage tolerance (5.5 V on inputs) are critical in space-constrained SO20 layouts.
Technical Context
This transceiver implements dual-rail CMOS logic with independent A-side and B-side 8-bit data ports, directionally controlled via a single DIR input that determines signal flow (A→B or B→A), while OE (active LOW) globally enables or disables all outputs into high-impedance state. The IOFF feature actively isolates I/Os during power-down, preventing backflow current when VCC = 0 V.
Schmitt-trigger inputs provide hysteresis (typ. 0.3 V at 3.3 V), enabling reliable operation with slow-rising signals, and bus hold functionality is absent in the 74LVC245A variant (present only in 74LVCH245A). Input voltage range spans -0.5 V to 5.5 V, decoupled from VCC, allowing safe interfacing with 5 V TTL sources even at 1.2 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.2 V to 3.6 V - Enables direct integration into ultra-low-power 1.8 V microcontrollers and legacy 3.3 V systems without level shifters. |
| Propagation Delay (tpd) | ≤6.3 ns at VCC = 3.3 V - Supports >80 MHz bus clocking in synchronous data transfer applications. |
| Input Overvoltage Tolerance | Up to 5.5 V - Allows safe connection to 5 V logic without external clamping diodes or resistors. |
| IOFF Leakage Current | ±10 μA max at VCC = 0 V - Prevents damaging backfeed current during hot-swap or partial system power-down sequences. |
| ESD Protection | HBM >2000 V, CDM >1000 V - Meets industrial-grade robustness requirements for board-level handling and field deployment. |
| Operating Temperature | -40 °C to +125 °C - Qualified for under-hood automotive modules and industrial motor drives without derating. |
| Output Drive Strength | ±24 mA at VCC = 3.0 V - Sufficient to drive 15 pF loads across 10 cm PCB traces at full speed. |
Pinout & Package
74LVC245AD,118 is packaged in SO20 (SOT163-1): plastic small outline, 20-pin, 7.5 mm body width, 1.27 mm pitch, JEDEC MS-013 compliant, with gull-wing leads suitable for reflow and wave soldering.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | DIR | Direction control input: HIGH enables B→A data flow; LOW enables A→B flow - critical for half-duplex bus arbitration. |
| 2–9 | A0–A7 | Port A bidirectional I/Os - connect to microcontroller GPIO or ASIC side; tolerate 5.5 V regardless of VCC. |
| 10 | GND | Ground reference - must be low-inductance connection to minimize switching noise coupling into sensitive analog sections. |
| 11–18 | B0–B7 | Port B bidirectional I/Os - interface to peripheral bus (e.g., memory, sensor array); share same voltage tolerance as A-side. |
| 19 | OE | Active-LOW output enable - asserted LOW enables transceiver; HIGH forces all A/B pins into high-Z, enabling bus sharing. |
| 20 | VCC | Power supply input - bypass with 100 nF ceramic capacitor placed ≤3 mm from pin to suppress high-frequency supply ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC range (1.2 V–3.6 V) | Supports direct interface with 1.2 V FPGA I/O banks and 3.3 V legacy peripherals without external regulators. |
| 5.5 V-tolerant inputs | Eliminates need for external voltage translators when connecting to 5 V microcontrollers or industrial sensors. |
| IOFF partial power-down | Prevents current backflow from live B-side bus into unpowered A-side MCU, satisfying IEC 61000-4-2 system-level ESD resilience. |
| Schmitt-trigger inputs | Enables reliable operation with noisy or slow-rising signals (e.g., mechanical switch debouncing, long cable runs). |
| High-speed tpd ≤6.3 ns | Meets timing closure for 100 Mbps parallel interfaces in test equipment and programmable logic controllers. |
Applications
| Industrial PLC Backplane Interface | Microcontroller I/O Expansion |
|---|---|
Use Scenario: Interfacing a 3.3 V ARM Cortex-M7 CPU to legacy 5 V discrete I/O modules across a 20 cm backplane. IC Role / Device Role / Timing Role: Bidirectional level-shifting transceiver managing data flow direction via DIR and enabling/disabling via OE during bus arbitration cycles. Use Value: Eliminates need for two separate unidirectional level shifters and reduces PCB layer count by consolidating A/B port routing in SO20 footprint. |
Use Scenario: Expanding GPIO count of a battery-powered IoT node using a 1.8 V SoC while retaining compatibility with 3.3 V sensors and displays. IC Role / Device Role / Timing Role: Voltage-translating bus buffer providing 8 additional bidirectional data lines with sub-10 ns propagation delay. Use Value: Enables direct connection to 3.3 V peripherals without pull-up resistors or external LDOs, reducing quiescent current by 120 μA vs. discrete MOSFET solution. |
| FPGA-to-ASIC Communication Bridge | Automotive Body Control Module |
Use Scenario: Synchronizing configuration data between a Xilinx Artix-7 FPGA (1.0 V core, 3.3 V I/O) and a custom ASIC with 2.5 V I/O banks. IC Role / Device Role / Timing Role: Direction-controlled data conduit with precise enable/disable timing (ten/tdis ≤11 ns) for glitch-free handshaking. Use Value: Guarantees setup/hold margin for 50 MHz parallel configuration bus while maintaining <1.5 ns output skew across all 8 bits. |
Use Scenario: Isolating LIN bus transceiver I/O from a 3.3 V microcontroller in a door module exposed to -40 °C to +125 °C ambient. IC Role / Device Role / Timing Role: Fault-tolerant bus interface with IOFF protection during ignition cycling and Schmitt-trigger noise rejection on chassis-ground-referenced lines. Use Value: Prevents latch-up during cold-cranking events (VCC dip to 0.8 V) and sustains operation without reset due to its extended temperature qualification. |
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) | Identical electrical specs; TSSOP20 package (4.4 mm width) vs. SO20 (7.5 mm); 10 % lower typical ICC at 3.3 V. | Preferred for high-density PCBs where board area is constrained; requires tighter stencil aperture for fine-pitch reflow. | Select when footprint reduction outweighs SO20's superior thermal dissipation (500 mW vs. TSSOP's 350 mW). |
| 74LVCH245AD,118 (Nexperia) | Includes bus hold on all A/B data inputs (74LVC245A lacks this); otherwise identical pinout, timing, and voltage specs. | Required where floating inputs must be prevented without external pull-ups (e.g., hot-plug connectors, modular backplanes). | Choose only if bus hold functionality is explicitly needed; adds 30 μA per input leakage but eliminates 16 external resistors. |
Compared with SN74LVC245APWR, the 74LVC245AD,118 offers better thermal performance in SO20 but occupies more board area; versus 74LVCH245AD, it trades bus hold capability for lower static current and reduced input leakage-critical in always-on battery systems.
Availability
74LVC245AD,118 is available at Aetrix Electronics and suitable for industrial PLC backplane interfaces, microcontroller I/O expansion, FPGA-to-ASIC communication bridges, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74LVC245AD,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, reliable, and energy-efficient components, with leadership in logic, discrete, and MOSFET technologies serving automotive, industrial, and consumer markets.
The 74LVC245A belongs to Nexperia's LVC (Low-Voltage CMOS) logic family, designed specifically for robust, low-power bidirectional bus interfacing in mixed-voltage embedded systems where reliability across wide temperature and supply ranges is mandatory.
FAQ
Can 74LVC245AD,118 operate with VCC = 1.2 V while interfacing with 5 V inputs?
Yes. Its inputs tolerate up to 5.5 V regardless of VCC level, and internal protection clamps ensure no damage occurs. At 1.2 V supply, VIH is 1.08 V and VIL is 0.12 V, so 5 V signals are safely recognized as HIGH with full noise margin. Output drive strength is reduced (±8 mA), but sufficient for short traces.
What is the purpose of the IOFF feature, and how does it behave during power-down?
IOFF disables all outputs and presents high impedance even when VCC = 0 V, preventing reverse current flow from live bus lines into the unpowered IC. Measured IOFF leakage is ±10 μA max at 5.5 V applied to any I/O while VCC = 0 V - critical for hot-swap and partial-power-down architectures in modular systems.
How does the DIR pin interact with OE, and what happens when both are asserted?
OE is prioritized: when OE = HIGH (disabled), all outputs go high-Z regardless of DIR state. When OE = LOW (enabled), DIR determines direction - DIR = LOW enables A→B flow; DIR = HIGH enables B→A flow. No contention occurs because OE gates the entire transceiver before direction logic is evaluated.
Is the SO20 package (SOT163-1) RoHS-compliant and lead-free?
Yes. The 74LVC245AD,118 in SO20 packaging meets RoHS Directive 2011/65/EU and is fully lead-free, with matte tin (Sn) termination finish. Its maximum reflow peak temperature is 260 °C, compatible with standard Pb-free soldering profiles per J-STD-020.
74LVC245AD,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LVC
- Package/Case:
- 20-SOIC (0.295", 7.50mm 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-SO
74LVC245AD,118 FAQ
1.How can I place an order for 74LVC245AD,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC245AD,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 74LVC245AD,118 reliable?
The price and inventory of 74LVC245AD,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC245AD,118 is usually 5 days.
3.What payment methods are accepted for 74LVC245AD,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC245AD,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC245AD,118?
74LVC245AD,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC245AD,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 74LVC245AD,118?
For technical support, including 74LVC245AD,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC245AD,118 requirements.
6.How does Aetrix verify that 74LVC245AD,118 is sourced from the original manufacturer or authorized distributors?
All 74LVC245AD,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 74LVC245AD,118 meets industry standards.
7.What is the process for return or replacement of 74LVC245AD,118?
All 74LVC245AD,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC245AD,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 74LVC245AD,118 part is unused and in its original packaging.
Return procedure for 74LVC245AD,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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