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NXP Semiconductors 74LV245DB,118
- Part No.:
- 74LV245DB,118
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74LV245DB,118.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,014
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Product details
Overview
74LV245DB,118 from Nexperia is an octal 3-state bus transceiver with bidirectional data flow controlled by DIR and active-low OE pins, operating across 1.0 V to 5.5 V supply, supporting TTL-level inputs at VCC ≥ 2.7 V, and rated for -40 °C to +125 °C ambient. It enables voltage-level translation and bus isolation in microcontroller peripheral interfaces.
For engineers reviewing the 74LV245DB,118 datasheet, 74LV245DB,118 pinout, 74LV245DB,118 application, or 74LV245DB,118 equivalent, this device is selected for low-voltage bidirectional bus buffering where supply flexibility, output disable control, and industrial temperature range are critical design requirements.
Technical Context
The 74LV245DB,118 implements a dual-rail CMOS transceiver architecture with independent direction (DIR) and output enable (OE) control logic. Its 8-bit A- and B-side I/Os support bidirectional data transfer only when OE is LOW and DIR sets flow direction - A→B or B→A - with simultaneous high-impedance state on both sides when OE is HIGH.
Input clamp diodes allow safe interfacing to voltages exceeding VCC when current-limiting resistors are used. Static and dynamic performance is specified across three VCC ranges (1.0–2.0 V, 2.0–3.6 V, 4.5–5.5 V), with propagation delay as low as 7 ns at VCC = 3.3 V and CL = 15 pF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.0 V to 5.5 V - supports mixed-voltage system interfacing and battery-powered operation down to 1.0 V logic. |
| Propagation Delay (tpd) | 7 ns typical at VCC = 3.3 V, CL = 15 pF - enables reliable timing in 100+ MHz bus systems with margin. |
| Output Enable Time (ten) | 10 ns typical at VCC = 3.3 V - ensures fast bus arbitration and rapid peripheral access switching. |
| IOZ (OFF-State Current) | < 10 μA at VCC = 5.5 V - minimizes leakage-induced signal corruption during tri-state hold. |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood automotive modules and industrial motor drives without derating. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - reduces need for external protection in board-level ESD-prone environments. |
| Power Dissipation Capacitance | CPD = 40 pF at VCC = 3.3 V - enables accurate dynamic power estimation for thermal budgeting. |
Pinout & Package
74LV245DB,118 is packaged in SOT339-1 (SSOP20), a 20-lead shrink small outline package with 0.65 mm lead pitch and 7.2 mm body width. Pin numbering follows standard SSOP convention with pin 1 marked by notch or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | DIR | Direction control input: LOW enables A→B data flow; HIGH enables B→A flow. |
| 2–9 | A0–A7 | Port A bidirectional data lines - connect to microcontroller or ASIC local bus. |
| 10 | GND | Ground reference for all I/O and internal logic - must be low-inductance connection. |
| 11–18 | B0–B7 | Port B bidirectional data lines - interface to memory, peripheral, or external bus segment. |
| 19 | OE | Active-low output enable: HIGH forces all A/B outputs into high-impedance state. |
| 20 | VCC | Positive supply rail - decoupling capacitor (100 nF) required within 5 mm of this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC range (1.0–5.5 V) | Enables single transceiver to bridge 1.8 V FPGA I/O to 5 V legacy peripherals without level shifters. |
| TTL-compatible inputs at 2.7–3.6 V | Eliminates need for external pull-ups or translators when interfacing with 3.3 V microcontrollers. |
| Clamp diode-equipped inputs | Permits safe connection to 5 V signals using series resistors - avoids overvoltage damage at low VCC. |
| Low ground bounce (< 0.8 V) | Reduces noise coupling into shared ground planes during simultaneous 8-bit switching events. |
| Latch-up immunity > 100 mA | Ensures robustness against transient current faults in noisy industrial power environments. |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module |
|---|---|
|
Use Scenario: Isolating CAN controller I/O from 5 V sensor bus while powered from 3.3 V MCU rail. IC Role / Device Role / Timing Role: Bidirectional voltage-translating buffer managing data exchange between MCU and legacy analog/digital sensors. Use Value: Eliminates discrete level-shifter components and reduces PCB area by 42% versus dual unidirectional solution. |
Use Scenario: Enabling shared memory access between 1.8 V infotainment SoC and 5 V HVAC actuator controller. IC Role / Device Role / Timing Role: Bus transceiver providing direction-controlled data path with fast enable/disable for time-critical command sequencing. Use Value: Supports deterministic 12.5 ns worst-case round-trip latency at 3.3 V, meeting ASAM MCAL timing constraints. |
| Medical Diagnostic Equipment Data Acquisition | Test & Measurement Instrumentation |
|
Use Scenario: Buffering ADC parallel output bus to FPGA processing unit under variable supply conditions (1.2–3.3 V). IC Role / Device Role / Timing Role: Low-noise, low-ground-bounce transceiver preserving signal integrity during high-speed sampling bursts. Use Value: Maintains <1 LSB error floor up to 20 MSPS due to sub-0.8 V ground bounce and tight VOH/VOL specs. |
Use Scenario: Interfacing arbitrary waveform generator DAC outputs to 5 V logic-based trigger subsystem. IC Role / Device Role / Timing Role: Direction-configurable bus isolator enabling synchronized capture of multi-channel analog waveforms. Use Value: Enables glitch-free bus sharing via OE-controlled tristate, reducing setup/hold violations by 3.1 ns average. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245APWR | Wider VCC range (1.65–3.6 V); no 1.0 V operation; higher drive strength (24 mA vs 16 mA at 3.3 V). | Optimized for 3.3 V-only systems; lacks 1.0–2.0 V ultra-low-power capability. | Select when higher output current and tighter VOL spec (0.55 V max) are prioritized over sub-2 V operation. |
| 74ALVC245MTCX | Faster tpd (5.3 ns typ at 3.3 V); lower CPD (30 pF); operates only from 2.3–3.6 V. | Targeted at high-speed digital test equipment; not suitable for battery-backed 1.8 V logic. | Choose for >150 MHz bus clocking where propagation delay dominates timing budget. |
Compared with SN74LVC245APWR and 74ALVC245MTCX, the 74LV245DB,118 uniquely supports 1.0 V operation and industrial temperature range without sacrificing ESD robustness or ground bounce performance - making it optimal for energy-constrained, wide-supply embedded systems.
Availability
74LV245DB,118 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, medical data acquisition subsystems, and test instrumentation requiring stable component supply across extended temperature and voltage ranges.
Supply support for 74LV245DB,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 with focus on efficiency, reliability, and miniaturization for industrial, automotive, and computing markets.
The 74LV245DB,118 belongs to Nexperia's LV (Low-Voltage) logic family, engineered specifically for robust bidirectional bus interfacing in mixed-supply systems where voltage scalability and thermal resilience are mandatory.
FAQ
What is the minimum VCC required for guaranteed operation of the 74LV245DB,118?
The 74LV245DB,118 is fully specified and functional down to VCC = 1.0 V, with static characteristics guaranteed from 1.2 V and dynamic operation verified at 1.0 V using GND/VCC input levels. This enables use in ultra-low-power battery-backed systems where supply drops below 1.2 V during brownout conditions.
Can the 74LV245DB,118 safely interface a 5 V signal to a 1.8 V microcontroller port?
Yes - its input clamp diodes permit direct connection of 5 V signals when series current-limiting resistors are used, and its TTL-compatible input thresholds (VIH ≥ 2.0 V at VCC = 2.7 V) ensure reliable recognition of 5 V logic HIGHs even when powered from 1.8 V, provided VI does not exceed VCC + 0.5 V.
Does the 74LV245DB,118 require external pull-up or pull-down resistors on DIR or OE?
No - DIR and OE have CMOS-compatible input structure with negligible leakage (<1 μA). However, OE must be actively driven LOW to enable outputs; leaving it floating risks undefined output states. A 10 kΩ pull-down on OE is recommended for fail-safe high-impedance default on power-up.
How does the 74LV245DB,118 handle simultaneous switching noise (SSN) in dense PCB layouts?
It specifies typical ground bounce < 0.8 V at VCC = 3.3 V and Tamb = 25 °C during full 8-bit switching, achieved via optimized output driver staging and internal ground routing. Layout best practices - including dedicated ground plane, localized 100 nF VCC decoupling, and minimized trace inductance - are essential to maintain this performance in production designs.
74LV245DB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LV
- Package/Case:
- 20-SSOP (0.209", 5.30mm 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:
- 16mA, 16mA
- Voltage - Supply:
- 1V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
74LV245DB,118 FAQ
1.How can I place an order for 74LV245DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LV245DB,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 74LV245DB,118 reliable?
The price and inventory of 74LV245DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LV245DB,118 is usually 5 days.
3.What payment methods are accepted for 74LV245DB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LV245DB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LV245DB,118?
74LV245DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LV245DB,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 74LV245DB,118?
For technical support, including 74LV245DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LV245DB,118 requirements.
6.How does Aetrix verify that 74LV245DB,118 is sourced from the original manufacturer or authorized distributors?
All 74LV245DB,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 74LV245DB,118 meets industry standards.
7.What is the process for return or replacement of 74LV245DB,118?
All 74LV245DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74LV245DB,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 74LV245DB,118 part is unused and in its original packaging.
Return procedure for 74LV245DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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