My Inquiry
My Account
NXP Semiconductors 74LVT245PW/AUJ
- Part No.:
- 74LVT245PW/AUJ
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74LVT245PW/AUJ.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,898
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74LVT245PW/AUJ from Nexperia is a 3.3 V octal bidirectional transceiver with 3-state outputs, direction control (DIR), and output enable (OE). It features bus-hold inputs, overvoltage-tolerant inputs up to 5.5 V, ±32 mA/±64 mA drive capability, and operates from –40 °C to +85 °C. It serves as a level-shifting interface between 3.3 V logic domains and legacy 5 V buses in embedded control backplanes.
For engineers reviewing the 74LVT245PW/AUJ datasheet, 74LVT245PW/AUJ pinout, 74LVT245PW/AUJ application, or 74LVT245PW/AUJ equivalent, key selection considerations include its 20-pin TSSOP package, BiCMOS output drive strength, IOFF power-down mode, JEDEC JESD8C compliance, and bus-hold functionality eliminating external pull-ups.
Technical Context
The 74LVT245PW/AUJ implements an octal bidirectional data path controlled by DIR and OE pins: DIR selects data flow direction (A→B or B→A), while OE (active LOW) places all outputs in high-impedance state. Its BiCMOS architecture enables TTL-level compatibility and fast propagation delays (typ. 2.4 ns at 3.3 V).
Bus-hold circuitry maintains valid logic states on unused A/B inputs without external resistors, and IOFF circuitry ensures minimal leakage (< ±100 μA) when VCC = 0 V-critical for hot-swap and partial-power-down systems. Input tolerance to 5.5 V allows direct interfacing with 5 V peripherals without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 3.6 V - supports standard 3.3 V rail with ±0.3 V margin; not 5 V tolerant for VCC |
| Input Voltage Range | 0 V to 5.5 V - enables direct connection to 5 V logic without external level translation |
| Output Drive | +64 mA / –32 mA - sufficient to drive heavy capacitive loads or multiple TTL inputs |
| Propagation Delay | Typ. 2.4 ns (tPLH/tPHL at 3.3 V) - supports >200 MHz data rates in short traces |
| Operating Temperature | –40 °C to +85 °C - qualified for industrial ambient environments |
| Bus-Hold Current | ±75 μA to ±150 μA - actively sustains input logic state without external biasing |
| IOFF Leakage | ±100 μA max at VCC = 0 V - prevents back-driving during power sequencing |
Pinout & Package
TSSOP20 package (SOT360-1): plastic thin shrink small outline, 20 leads, body width 4.4 mm, 0.65 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | LOW = A→B data flow; HIGH = B→A; determines active bus side during enabled state |
| 2–9 (A0–A7) | Data I/O port A | Bidirectional interface for local 3.3 V domain; bus-hold enabled |
| 10 (GND) | Ground reference | 0 V return path for all internal circuitry and I/O |
| 11–18 (B0–B7) | Data I/O port B | Bidirectional interface for external 5 V or mixed-voltage bus; overvoltage tolerant |
| 19 (OE) | Output enable (active LOW) | Drives all A/B outputs to high-impedance when HIGH; supports bus sharing |
| 20 (VCC) | Supply voltage | 3.3 V nominal power rail; must be decoupled locally per JEDEC guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Overvoltage-tolerant inputs | Withstands 5.5 V on A/B pins while VCC = 3.3 V - eliminates need for external clamping diodes |
| Bus-hold inputs | Maintains last-valid logic state on floating A/B pins - removes requirement for 10 kΩ pull-up/down resistors |
| IOFF partial power-down | Leakage < ±100 μA when VCC = 0 V - prevents current backflow during hot insertion or power sequencing |
| Live insertion/extraction support | Guaranteed no latch-up or damage during board insertion into powered backplane - validated per JESD78 Class II-A |
| BiCMOS output stage | Combines bipolar speed and CMOS low static power - achieves 2.4 ns propagation delay with 0.19 mA ICC |
Applications
| Industrial Backplane Interface | Embedded Control Bus Bridge |
|---|---|
Use Scenario: Interfacing a 3.3 V microcontroller unit to a legacy 5 V ISA-style backplane carrying sensor and actuator signals. IC Role / Device Role / Timing Role: Bidirectional level-translating transceiver managing data flow direction under software control via DIR and enabling/disabling bus access via OE. Use Value: Eliminates discrete level shifters and pull-up networks, reducing BOM count and PCB area while supporting hot-plug operation. | Use Scenario: Connecting an FPGA's 3.3 V I/O bank to a 5 V peripheral bus in programmable logic controller (PLC) I/O modules. IC Role / Device Role / Timing Role: Octal bus interface with precise timing control (2.4 ns tPLH) and bus-hold retention during configuration gaps. Use Value: Ensures deterministic signal integrity during FPGA reconfiguration windows and prevents floating-bus glitches. |
| Test Equipment Signal Routing | Automated Test Fixture Interface |
Use Scenario: Routing digital stimulus/response signals between 3.3 V test pattern generator and 5 V DUT in ATE systems. IC Role / Device Role / Timing Role: Direction-controlled transceiver synchronized to test clock edges; OE used for bus isolation between test phases. Use Value: Enables sub-5 ns timing margins and eliminates cross-talk from un-driven lines during multi-DUT parallel testing. | Use Scenario: Adapting modular test fixtures with mixed-voltage peripherals (e.g., 5 V sensors, 3.3 V ADCs) to a common 3.3 V controller board. IC Role / Device Role / Timing Role: Voltage-agile bus interface providing configurable data path direction and glitch-free bus release via 3-state control. Use Value: Reduces fixture redesign effort when swapping 5 V or 3.3 V peripherals; bus-hold prevents false triggers during module swaps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC245ADTR | Lower drive (+32 mA/–32 mA); 1.65–3.6 V supply; no bus-hold; no 5.5 V input tolerance | Suitable only for pure 3.3 V or dual-supply 1.8 V/3.3 V systems; requires external pull-ups if inputs float | Select when cost sensitivity outweighs 5 V interface needs and bus-hold is unnecessary |
| SN74LVC8T245RHLR | Higher drive (+64 mA/–64 mA); 1.65–3.6 V supply; no 5.5 V input tolerance; different pinout (VQFN24) | Requires PCB redesign; lacks overvoltage protection - mandates external clamping for 5 V bus use | Choose only if higher symmetrical drive is required and 5 V bus exposure is eliminated |
Compared with 74LVT245PW/AUJ, the 74LVC245ADTR offers lower cost but forfeits 5.5 V input tolerance and bus-hold, increasing system design complexity. The SN74LVC8T245RHLR provides symmetrical drive but introduces layout risk due to incompatible packaging and missing overvoltage protection-making 74LVT245PW/AUJ the robust choice for mixed-voltage industrial interfaces.
Availability
74LVT245PW/AUJ is available at Aetrix Electronics and suitable for industrial backplane interfaces, embedded control bus bridges, automated test equipment signal routing, and modular test fixture interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74LVT245PW/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 delivering high-performance logic, analog, and MOSFET solutions optimized for efficiency, reliability, and manufacturability in high-volume applications.
The 74LVT245PW/AUJ belongs to Nexperia's LVT (Low-Voltage Technology) logic family, engineered specifically for robust 3.3 V bidirectional bus interfacing in industrial and telecom infrastructure where mixed-voltage interoperability and hot-swap resilience are mandatory.
FAQ
What is the maximum input voltage the 74LVT245PW/AUJ can tolerate on its A/B pins?
The 74LVT245PW/AUJ supports input voltages up to 5.5 V on all A0–A7 and B0–B7 pins, regardless of VCC level (2.7 V to 3.6 V). This overvoltage tolerance enables direct connection to 5 V buses without external level-shifting components, as confirmed in Table 4 (Limiting Values) and Section 2 of the Nexperia datasheet Rev. 6.
Does the 74LVT245PW/AUJ support hot insertion into a live 5 V backplane?
Yes, the 74LVT245PW/AUJ supports live insertion and extraction, validated per JESD78 Class II-A latch-up immunity (>500 mA). Its IOFF circuitry limits leakage to ±100 μA when VCC = 0 V, and overvoltage-tolerant inputs prevent damage during power sequencing-making it suitable for hot-plug backplane applications as stated in Section 2 Features and Benefits.
How does bus-hold functionality work on the 74LVT245PW/AUJ, and what value does it provide?
The 74LVT245PW/AUJ integrates bus-hold circuitry on all A/B input pins, maintaining the last-valid logic state with ±75 μA to ±150 μA holding current. This eliminates the need for external 10 kΩ pull-up or pull-down resistors on unused inputs, reducing BOM cost, PCB space, and potential noise coupling-explicitly cited in Sections 1 and 2 of the datasheet.
What is the typical propagation delay of the 74LVT245PW/AUJ at 3.3 V supply?
The 74LVT245PW/AUJ exhibits a typical propagation delay of 2.4 ns for both tPLH and tPHL at VCC = 3.3 V ± 0.3 V and Tamb = 25 °C, as specified in Table 7 (Dynamic Characteristics). This enables reliable operation in systems requiring sub-5 ns timing margins, such as high-speed industrial bus interfaces.
Is the 74LVT245PW/AUJ pin-compatible with other packages in the same family?
No-the 74LVT245PW/AUJ uses the TSSOP20 (SOT360-1) package with specific pin mapping shown in Figure 5. While functionally identical to 74LVT245D (SO20) and 74LVT245BQ (DHVQFN20), the physical pinout differs across packages; PCB layout must match SOT360-1 dimensions and land pattern per Figure 7 of the datasheet.
74LVT245PW/AUJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVT
- 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:
- 32mA, 64mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74LVT245PW/AUJ FAQ
1.How can I place an order for 74LVT245PW/AUJ through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVT245PW/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 74LVT245PW/AUJ reliable?
The price and inventory of 74LVT245PW/AUJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT245PW/AUJ is usually 5 days.
3.What payment methods are accepted for 74LVT245PW/AUJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT245PW/AUJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVT245PW/AUJ?
74LVT245PW/AUJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVT245PW/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 74LVT245PW/AUJ?
For technical support, including 74LVT245PW/AUJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT245PW/AUJ requirements.
6.How does Aetrix verify that 74LVT245PW/AUJ is sourced from the original manufacturer or authorized distributors?
All 74LVT245PW/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 74LVT245PW/AUJ meets industry standards.
7.What is the process for return or replacement of 74LVT245PW/AUJ?
All 74LVT245PW/AUJ units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT245PW/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 74LVT245PW/AUJ part is unused and in its original packaging.
Return procedure for 74LVT245PW/AUJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74LVT245PW/AUJ Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
