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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

NXP Semiconductors 74LVT245DB,112

Name: 74LVT245DB,112
Brand: NXP Semiconductors
SKU: 74LVT245DB,112
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LVT245DB,112

Manufacturer:: NXP Semiconductors

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-SSOP (0.209", 5.30mm Width)

Datasheet:: 74LVT245DB,112.pdf

Description:: IC TRANSCVR TRI-ST 8BIT 20SSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

74LVT245DB,112 from Nexperia is an octal bus transceiver with 3-state outputs, designed for bidirectional data flow between two 8-bit buses in LVTTL systems. It operates at 3.3 V supply, supports ±24 mA drive strength, features 2.6 ns typical propagation delay, and is used in high-speed memory address/data bus interfacing.

For engineers reviewing the 74LVT245DB,112 datasheet, 74LVT245DB,112 pinout, 74LVT245DB,112 application, or 74LVT245DB,112 equivalent, key selection criteria include direction control timing, output drive capability under 3.3 V, bus hold functionality absence, and SO-20 package thermal performance in dense PCB layouts.

Technical Context

This transceiver implements dual-rail level translation between 3.3 V LVTTL logic domains using separate V_CC (3.3 V) and ground references. Direction control (DIR) and output enable (OE) are asynchronous, with DIR determining data flow direction and OE disabling both A- and B-side outputs simultaneously.

It uses standard TTL-compatible input thresholds (V_IH = 2.0 V min, V_IL = 0.8 V max) and delivers rail-to-rail CMOS-compatible outputs. No internal pull-ups, bus-hold, or auto-direction sensing is present - external control signals are mandatory for correct operation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC	3.3 V nominal - defines compatible I/O voltage domain and power rail requirement
t_PD	2.6 ns typical - determines maximum achievable bus transfer rate in synchronous systems
I_OH/I_OL	±24 mA - enables direct driving of multiple LVTTL inputs without external buffers
t_SU(DIR)	2.0 ns minimum - specifies minimum setup time for direction control before data valid
Propagation Skew	0.5 ns max - ensures simultaneous switching across all 8 bits for clean bus transitions
Input Hysteresis	None - requires clean, monotonic input edges to avoid metastability on DIR/OE

Pinout & Package

74LVT245DB,112 is housed in a 20-pin SO (Small Outline) package with 0.65 mm pitch, JEDEC MS-013AC compliant, and rated for -40 °C to +85 °C ambient operation.

Pin/Terminal	Circuit Role	Design Meaning
A0–A7	Data inputs/outputs (Port A)	Bidirectional I/O pins connected to local bus; high-impedance when OE high
B0–B7	Data inputs/outputs (Port B)	Bidirectional I/O pins connected to remote bus; high-impedance when OE high
DIR	Direction control input	High = A→B data flow; Low = B→A data flow; asynchronous edge-sensitive
OE	Output enable input	Active-low; disables both ports to high-impedance state when high
V_CC	Supply pin	3.3 V power connection; decoupling capacitor required within 10 mm
GND	Ground reference	Signal and power return path; must be low-inductance plane connection

Key Features

Feature	Design Value
3.3 V LVTTL compatibility	Meets JEDEC JESD8-5 input/output thresholds and drive strength for interoperability with LVTTL ASICs and FPGAs
±24 mA output drive	Supports fan-out of up to 16 LVTTL loads per pin without signal degradation or timing skew
2.6 ns propagation delay	Enables 300+ MHz bus clocking in point-to-point configurations with controlled trace length
SO-20 package	Enables high-density routing on 4-layer PCBs with standard reflow profiles and IPC-7351B land pattern

Applications

Memory Interface Bridge

FPGA-to-ASIC Data Coupling

Use Scenario: Interfacing a 3.3 V FPGA I/O bank to a legacy 3.3 V SRAM with separate address and data buses.

IC Role / Device Role / Timing Role: Bidirectional level-matched bus transceiver enabling read/write cycles with precise DIR timing relative to memory strobes.

Use Value: Eliminates need for discrete level shifters while maintaining sub-3 ns timing margin for 100 MHz asynchronous SRAM access.

Use Scenario: Connecting configurable logic block outputs to fixed-function ASIC peripherals in telecom line cards.

IC Role / Device Role / Timing Role: Isolating and steering parallel control/status data between heterogeneous logic domains with independent reset sequencing.

Use Value: Prevents bus contention during power-up by allowing OE-controlled tri-state isolation until both sides are fully initialized.

Industrial PLC Backplane

Test Equipment Bus Extender

Use Scenario: Extending 8-bit parallel I/O between CPU module and modular I/O carrier in DIN-rail mounted controllers.

IC Role / Device Role / Timing Role: Robust bidirectional data repeater supporting hot-swap capable backplane with noise-immune DIR/OE control.

Use Value: Delivers 24 mA drive into 50 Ω terminated lines over 15 cm traces, maintaining signal integrity in EMI-heavy factory environments.

Use Scenario: Adding isolated 8-bit data lanes between main controller and DUT interface board in automated test fixtures.

IC Role / Device Role / Timing Role: Controlled-direction buffer enabling synchronized data capture and stimulus injection without cross-talk.

Use Value: Enables deterministic 2.6 ns latency for real-time pass/fail decision logic in boundary-scan and functional test sequences.

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	Lower drive (±24 mA same), but wider V_CC range (1.65–3.6 V); no LVTTL-specific input thresholds	Accepts mixed-voltage inputs; less suitable for strict LVTTL timing-critical paths	Prefer when system uses 2.5 V or 3.3 V rails interchangeably and timing margins exceed 3.5 ns
74ALVC245MTCX	Same pinout, but lower t_PD (2.1 ns typ) and higher I_OH/I_OL (±24 mA same); tighter propagation skew (0.3 ns)	Requires stricter layout due to faster edge rates; more sensitive to stub length	Choose only when sub-2.5 ns timing budget is mandatory and PCB layout supports controlled impedance routing

Compared with SN74LVC245APWR and 74ALVC245MTCX, the 74LVT245DB,112 provides optimized LVTTL threshold matching and predictable 2.6 ns delay for legacy 3.3 V bus designs where voltage tolerance and edge rate control are secondary to deterministic timing behavior.

Availability

74LVT245DB,112 is available at Aetrix Electronics and suitable for memory interface bridges, FPGA-to-ASIC coupling, and industrial PLC backplanes requiring stable component supply and long-term manufacturability.

Supply support for 74LVT245DB,112 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 and automotive markets.

The 74LVT series targets high-speed digital interconnect in 3.3 V systems, emphasizing precise timing, robust noise immunity, and compatibility with legacy LVTTL infrastructure.

FAQ

Can 74LVT245DB,112 operate at 2.5 V?

No. The device is specified only for 3.3 V ±10 % operation. At 2.5 V, input thresholds fall outside LVTTL compliance, propagation delay increases beyond 5 ns, and output drive drops below 12 mA - violating guaranteed timing and signal integrity specs.

Is DIR pin edge-triggered or level-sensitive?

DIR is level-sensitive. Its logic state determines data direction continuously while OE is active low. No clock or edge detection is involved - direction changes immediately upon DIR voltage crossing 1.4 V threshold, with 2.0 ns setup required before data validity.

Does 74LVT245DB,112 include bus-hold circuitry?

No. The device has no internal bus-hold resistors. External pull-up or pull-down resistors are required on unused A/B pins to prevent floating inputs, especially during power-up or OE-high high-impedance states.

What is the maximum recommended trace length for 100 MHz operation?

For reliable 100 MHz operation with 2.6 ns propagation delay, trace lengths should not exceed 15 cm on FR-4 with 50 Ω characteristic impedance. Longer traces require source termination and careful skew management across all 8 data lines.

74LVT245DB,112 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: 74LVT

Package/Case:: 20-SSOP (0.209", 5.30mm Width)

Packaging:: Tube

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-SSOP

74LVT245DB,112 FAQ

1.How can I place an order for 74LVT245DB,112 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVT245DB,112 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 74LVT245DB,112 reliable?

The price and inventory of 74LVT245DB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT245DB,112 is usually 5 days.

3.What payment methods are accepted for 74LVT245DB,112?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT245DB,112 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LVT245DB,112?

74LVT245DB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVT245DB,112 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 74LVT245DB,112?

For technical support, including 74LVT245DB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT245DB,112 requirements.

6.How does Aetrix verify that 74LVT245DB,112 is sourced from the original manufacturer or authorized distributors?

All 74LVT245DB,112 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 74LVT245DB,112 meets industry standards.

7.What is the process for return or replacement of 74LVT245DB,112?

All 74LVT245DB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT245DB,112, 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 74LVT245DB,112 part is unused and in its original packaging.

Return procedure for 74LVT245DB,112:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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