Renesas IDT74LVC245APGG8

Overview

IDT74LVC245APGG8 from Integrated Device Technology is a 3.3V CMOS octal bus transceiver with 3-state outputs and 5V-tolerant I/O, designed for bidirectional asynchronous data transfer between two 8-bit buses (A and B). It features ±24mA output drive strength, industrial temperature range (–40°C to +85°C), and rail-to-rail output swing for enhanced noise margin in mixed-voltage systems.

For engineers reviewing the IDT74LVC245APGG8 datasheet, IDT74LVC245APGG8 pinout, IDT74LVC245APGG8 application, or IDT74LVC245APGG8 equivalent, key selection criteria include 5V-tolerant I/O compatibility, direction control (DIR) and output enable (OE) logic behavior, propagation delay under 6.3 ns at 3.3V, and TSSOP-20 package suitability for space-constrained PCB layouts.

Technical Context

The IDT74LVC245APGG8 implements dual-bus bidirectional translation via a single DIR pin that determines data flow direction (A→B or B→A), while OE independently places both ports into high-impedance state regardless of DIR. All inputs incorporate hysteresis (100 mV typical) to improve noise immunity in electrically noisy environments.

It operates across VCC = 2.7V to 3.6V, supports hot insertion, and maintains full 5V tolerance on all I/O pins-enabling safe interfacing with legacy 5V logic without level-shifting circuitry. Its ±24mA drive capability allows direct connection to moderate capacitive loads up to 50 pF while sustaining sub-7 ns propagation delay.

Key Specifications

Pinout & Package

Package: 20-pin Thin Shrink Small Outline Package (TSSOP), lead-free and RoHS-compliant (PGG suffix).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal bus transceiver applications.

Compared with IDT74LVC245APGG8, SN74LVC245APWR offers identical functionality with negligible timing trade-off, while 74LVC245AD,118 provides cost savings at the expense of guaranteed low-VCC drive performance-making IDT74LVC245APGG8 optimal for robust industrial operation across full voltage and temperature range.

Availability

IDT74LVC245APGG8 is available at Aetrix Electronics and suitable for industrial PLC backplanes, mixed-voltage sensor hubs, telecom line cards, and automated test equipment requiring stable component supply and long-term lifecycle assurance.

Supply support for IDT74LVC245APGG8 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

Integrated Device Technology (IDT), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance interconnect solutions.

IDT74LVC245APGG8 belongs to the LVC logic family, engineered for low-voltage, high-speed, mixed-supply system interfacing-specifically targeting industrial and communications infrastructure where voltage translation, noise immunity, and hot-swap reliability are critical.

FAQ

What is the maximum recommended load capacitance for IDT74LVC245APGG8 to maintain specified timing?

IDT74LVC245APGG8 is characterized with CL = 50 pF in switching specifications, and its 47 pF typical power dissipation capacitance (CPD) assumes this load. For guaranteed tPLH/tPHL ≤6.3 ns at 3.3V, total net capacitance-including PCB trace, stubs, and connected inputs-must remain ≤50 pF. Exceeding this increases propagation delay nonlinearly and may violate setup/hold margins in synchronous systems.

Can IDT74LVC245APGG8 safely interface a 3.3V FPGA to a 5V EEPROM without external components?

Yes. IDT74LVC245APGG8 supports 5V-tolerant I/O across its full operating range (VCC = 2.7V–3.6V), allowing direct connection of FPGA I/O pins (3.3V) to EEPROM address/data lines (5V). Its VIH/VIL thresholds scale with VCC, and internal clamp diodes handle overvoltage-no series resistors or level shifters are needed for static or low-frequency access.

How does the DIR pin interact with OE in IDT74LVC245APGG8?

In IDT74LVC245APGG8, OE is dominant: when OE is HIGH, both A and B ports enter high-impedance state regardless of DIR state. When OE is LOW, DIR determines direction-LOW enables B→A data flow, HIGH enables A→B. This priority ensures deterministic bus isolation during system reset or configuration phases independent of direction setting.

Is IDT74LVC245APGG8 compatible with JEDEC-standard LVC logic levels?

Yes. IDT74LVC245APGG8 conforms fully to JEDEC JESD8-5 and JESD8-B standards for 3.3V LVC logic, including input thresholds (VIH ≥2.0V, VIL ≤0.8V at VCC=3.3V), output drive (±24mA), and 5V-tolerant I/O. Its hysteresis and noise margin meet or exceed JEDEC requirements for industrial noise immunity.

What thermal considerations apply to IDT74LVC245APGG8 in continuous high-drive operation?

IDT74LVC245APGG8 has a θJA of 120°C/W (TSSOP-20, JEDEC 2S2P board). At worst-case ±24mA drive on all 16 I/Os with VCC=3.6V, total dynamic power remains <15 mW-generating negligible junction temperature rise (<2°C above ambient). No heatsinking is required, even in sealed industrial enclosures up to +85°C ambient.