Renesas 74LVCH32245ABF8

Overview

74LVCH32245ABF8 from Renesas Electronics is a 3.3V CMOS 32-bit bus transceiver with 3-state outputs, 5V-tolerant I/O, bus-hold functionality, ±24mA balanced drivers, and industrial temperature range (–40°C to +85°C). It operates as four independent 8-bit or one unified 32-bit transceiver in mixed-voltage systems.

For engineers reviewing the 74LVCH32245ABF8 datasheet, 74LVCH32245ABF8 pinout, 74LVCH32245ABF8 application, or 74LVCH32245ABF8 equivalent, key selection criteria include 5V I/O tolerance, bus-hold input retention, output skew <500ps, and LFBGA-96 package compatibility for high-density PCB layouts.

Technical Context

This device implements asynchronous bidirectional data transfer between two 32-bit buses (A and B) using dedicated DIR and OE controls per 8-bit bank. Direction is determined by xDIR inputs; xOE overrides direction and forces high-impedance on both ports. All inputs feature hysteresis (100mV typical) for noise immunity.

The transceiver uses dual-metal CMOS process for low static power (0.4μW typ.) and supports hot insertion. Bus-hold circuitry actively retains last valid logic state on floating inputs-eliminating external pull resistors-and all I/O pins tolerate 0–5.5V regardless of VCC (2.7–3.6V).

Key Specifications

Pinout & Package

Package: 96-ball Low-Profile Fine-Pitch Ball Grid Array (LFBGA), JEDEC MO-255 compliant, 10mm × 10mm body, 0.8mm ball pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC32245APAG and 74ALVC16245PW, the 74LVCH32245ABF8 delivers integrated bus-hold, tighter output skew, and native 32-bit width in a compact LFBGA-reducing component count, improving signal integrity, and simplifying thermal management in high-density industrial systems.

Availability

74LVCH32245ABF8 is available at Aetrix Electronics and suitable for industrial PLC backplanes, telecom line card interfaces, and server memory expansion modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for 74LVCH32245ABF8 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

Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, infrastructure, and IoT applications.

The 74LVCH32245ABF8 belongs to Renesas' LVC logic family, engineered for high-speed, low-power, mixed-voltage interfacing in harsh industrial environments with emphasis on reliability, ESD robustness, and ease of system integration.

FAQ

What is the operating temperature range of the 74LVCH32245ABF8?

The 74LVCH32245ABF8 is rated for industrial temperature operation from –40°C to +85°C. This range is validated across all electrical specifications including propagation delay, output drive, and bus-hold functionality. The device uses Renesas' qualified LFBGA packaging and dual-metal CMOS process to ensure parametric stability and reliability under sustained thermal stress in factory automation and outdoor telecom equipment.

Does the 74LVCH32245ABF8 require external pull-up or pull-down resistors on its inputs?

No, the 74LVCH32245ABF8 does not require external pull-up or pull-down resistors on its inputs because it integrates bus-hold circuitry on all A-side and B-side I/O pins. This feature actively retains the last valid logic state when an input floats, drawing ±75µA sustain current at VCC = 3V. Bus-hold eliminates risk of undefined states during power-up, hot-swap, or signal disconnection-reducing BOM cost and PCB area versus discrete resistor solutions.

Can the 74LVCH32245ABF8 interface directly between 3.3V and 5V logic domains?

Yes, the 74LVCH32245ABF8 supports direct 3.3V-to-5V logic interfacing: all I/O pins are 5V tolerant (0–5.5V), and VCC operates from 2.7V to 3.6V. Inputs accept 5V signals safely without clamping or damage, and outputs swing rail-to-rail within the 3.3V domain while driving 5V-tolerant loads. This eliminates external level translators in mixed-supply systems such as industrial backplanes and telecom line cards where the 74LVCH32245ABF8 serves as a voltage-agile bus bridge.

What is the maximum output skew specification for the 74LVCH32245ABF8?

The maximum output skew (tSK(o)) for the 74LVCH32245ABF8 is 500ps, measured between any two outputs switching in the same direction under identical conditions (VCC = 3.3V, TA = 25°C). This tight skew ensures deterministic timing alignment across all 32 bits-critical for high-speed parallel interfaces like memory expansion buses or FPGA-to-ASIC data links-where mismatched delays could violate setup/hold windows and cause metastability or data corruption.

Is the 74LVCH32245ABF8 compatible with hot-insertion systems?

Yes, the 74LVCH32245ABF8 is explicitly designed for hot-insertion applications. Its 5V-tolerant I/O structure, bus-hold inputs, and robust ESD protection (>2000V HBM, >200V MM) prevent latch-up or damage during live card insertion. The device enters high-impedance state immediately upon power loss or OE assertion, isolating upstream logic. This makes the 74LVCH32245ABF8 suitable for modular chassis systems such as telecom shelf controllers and industrial rack-mounted I/O modules where field-replaceable units must be swapped without system shutdown.