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Nexperia USA Inc. 74LV245PW
- Part No.:
- 74LV245PW
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74LV245PW.pdf
- Description:
- BUS TRANSCEIVER, LV/LV-A/LVX/H S
- Quantity:
- Payment:
- Shipping:
Inventory:1,250
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Product details
Overview
74LV245PW from NXP Semiconductors is an octal bus transceiver with 3-state outputs, designed for bidirectional data transmission between two 8-bit buses in low-voltage CMOS systems. It operates from 1.0 V to 3.6 V, supports ±24 mA output drive, and features 5.5 ns typical propagation delay at 3.3 V.
For engineers reviewing the 74LV245PW datasheet, 74LV245PW pinout, 74LV245PW application, or 74LV245PW equivalent, key selection criteria include voltage compatibility with 1.8 V/2.5 V/3.3 V logic domains, bus direction control timing, output drive strength for capacitive loads, and thermal performance in TSSOP-20 packages.
Technical Context
This device implements dual-function 8-bit bidirectional bus interface logic with separate DIR (direction) and OE (output enable) controls. Its TTL-compatible input thresholds and rail-to-rail output swing ensure interoperability across mixed-voltage systems.
The LV family's low dynamic power consumption (0.5 µA max ICC at 3.3 V) and ESD protection (>2 kV HBM) support reliable operation in portable and industrial I/O expansion applications without external level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.0 V to 3.6 V - enables direct interfacing with 1.8 V, 2.5 V, and 3.3 V logic families |
| Propagation Delay | 5.5 ns (typ) at VCC = 3.3 V - supports 100+ MHz bus clocking with timing margin |
| Output Drive | ±24 mA - drives 15 pF loads over 10 cm PCB traces without signal integrity degradation |
| Input Threshold | VIL = 0.63 V, VIH = 1.9 V at VCC = 3.3 V - ensures robust noise immunity in noisy industrial environments |
| Quiescent Current | 0.5 µA max at 3.3 V - reduces standby power in battery-backed I/O expanders |
| ESD Rating | 2 kV HBM - meets IEC 61000-4-2 Level 2 for system-level ESD robustness |
Pinout & Package
TSSOP-20 package: 20-pin thin shrink small outline package with 0.65 mm pitch, 6.5 mm × 4.4 mm body, and exposed pad for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A7 | Data inputs/outputs (Port A) | Bidirectional I/O pins connected to local microcontroller bus |
| B0–B7 | Data inputs/outputs (Port B) | Bidirectional I/O pins connected to peripheral or memory bus |
| DIR | Direction control input | High = A→B transfer; Low = B→A transfer - defines real-time data flow path |
| OE | Output enable input | Low = active bus drivers; High = high-impedance state - enables bus sharing |
| VCC | Positive supply | Single supply pin supporting 1.0–3.6 V operation |
| GND | Ground reference | Common return path for all I/O and supply currents |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply voltage range | 1.0 V to 3.6 V operation eliminates need for external level translators in mixed-voltage systems |
| High output drive capability | ±24 mA per pin sustains signal integrity driving multiple loads or long traces |
| Low propagation delay | 5.5 ns typical at 3.3 V enables use in high-speed parallel interfaces up to 100 MHz |
| 3-state outputs with independent control | DIR and OE pins allow precise timing of bus arbitration and direction switching |
| Thermal-enhanced TSSOP package | Exposed pad improves heat dissipation for sustained 24 mA operation in compact layouts |
Applications
| Industrial PLC I/O Expansion | Embedded Memory Interface |
|---|---|
Use Scenario: Adding parallel GPIO to a 3.3 V ARM-based controller in a programmable logic controller rack. IC Role / Device Role / Timing Role: Bidirectional data bridge between MCU's APB bus and isolated 24 V digital I/O modules. Use Value: ±24 mA drive directly interfaces optocoupler inputs without buffer stages; 5.5 ns delay preserves setup/hold timing margins. | Use Scenario: Connecting an FPGA's 8-bit data bus to external SRAM or flash memory operating at 2.5 V. IC Role / Device Role / Timing Role: Voltage-level translating transceiver enabling synchronous read/write cycles between mismatched logic domains. Use Value: 1.0–3.6 V supply range matches both FPGA I/O banks and memory VDD, eliminating discrete level shifters. |
| USB-to-Parallel Adapter | Test Equipment Digital Pattern Generator |
Use Scenario: Converting USB-hub-generated parallel control signals to legacy printer port voltages. IC Role / Device Role / Timing Role: Direction-controlled data conduit between USB bridge IC and Centronics connector. Use Value: DIR pin synchronized with USB packet boundaries ensures glitch-free handshaking on STROBE and ACK lines. | Use Scenario: Generating precise 8-bit stimulus patterns for DUT testing under automated test equipment control. IC Role / Device Role / Timing Role: High-speed bidirectional data latch buffering pattern generator outputs to DUT pins. Use Value: 2 kV HBM ESD rating prevents latch-up during probe contact; TSSOP-20 fits dense PCB layouts. |
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 | Wider VCC range (1.65–3.6 V); slightly higher ICC (10 µA typ) | Requires minimum 1.65 V supply - not suitable for 1.2 V or 1.0 V systems | Select when operating exclusively above 1.65 V and needing TI's enhanced latch-up immunity |
| 74ALVC245MTCX | Faster tPD (2.8 ns typ); higher drive (±24 mA same), but only rated for 2.3–3.6 V | Limited to 2.5 V/3.3 V systems; no 1.8 V support | Choose for maximum speed in 3.3 V-only designs where 1.0–1.8 V compatibility is unnecessary |
Compared with SN74LVC245APWR and 74ALVC245MTCX, the 74LV245PW uniquely supports 1.0 V operation while maintaining ±24 mA drive and 5.5 ns delay - critical for ultra-low-power mixed-voltage I/O expansion where supply headroom is constrained.
Availability
74LV245PW is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, embedded memory interface, and USB-to-parallel adapter designs requiring stable component supply and long-term lifecycle assurance.
Supply support for 74LV245PW 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The 74LV series targets low-voltage, high-drive logic interfaces for mixed-signal embedded systems where power efficiency, voltage flexibility, and bus integrity are critical design constraints.
FAQ
What is the maximum capacitive load the 74LV245PW can drive reliably?
The 74LV245PW maintains specified timing and signal integrity driving up to 15 pF loads at 3.3 V with 5.5 ns propagation delay. Driving >20 pF requires derating VCC or adding series termination; layout practices like controlled impedance routing and minimized stub length are recommended for >30 pF loads.
Can the 74LV245PW operate with DIR and OE tied together?
DIR and OE must be controlled independently: tying them together disables direction control and forces unidirectional operation. OE alone controls 3-state output, while DIR sets data flow direction. Simultaneous assertion of OE = low and DIR = high or low is required for functional bidirectional transfer.
Is the 74LV245PW compatible with 5 V tolerant inputs?
No - the 74LV245PW is not 5 V tolerant. Its absolute maximum input voltage is VCC + 0.5 V. Applying 5 V signals to any input pin when VCC ≤ 3.6 V will exceed ratings and may cause permanent damage. External clamping or level-shifting is mandatory for 5 V interface scenarios.
Does the TSSOP-20 package require thermal vias under the exposed pad?
Yes - the exposed pad in the TSSOP-20 package is electrically connected to GND and serves as a primary thermal path. At least four 0.3 mm thermal vias filled with solder, connecting the pad to an internal GND plane, are required to maintain junction temperature below 125°C at full ±24 mA drive per pin.
74LV245PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LV
- Package/Case:
- 20-TSSOP (0.173", 4.40mm 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-TSSOP
74LV245PW FAQ
1.How can I place an order for 74LV245PW through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LV245PW 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 74LV245PW reliable?
The price and inventory of 74LV245PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LV245PW is usually 5 days.
3.What payment methods are accepted for 74LV245PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LV245PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LV245PW?
74LV245PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LV245PW 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 74LV245PW?
For technical support, including 74LV245PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LV245PW requirements.
6.How does Aetrix verify that 74LV245PW is sourced from the original manufacturer or authorized distributors?
All 74LV245PW 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 74LV245PW meets industry standards.
7.What is the process for return or replacement of 74LV245PW?
All 74LV245PW units undergo pre-shipment inspection (PSI). If there is an issue with 74LV245PW, 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 74LV245PW part is unused and in its original packaging.
Return procedure for 74LV245PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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