NXP Semiconductors 74LVTH32245EC,518

Overview

74LVTH32245EC,518 from NXP Semiconductors is a 3.3 V, 32-bit non-inverting bus transceiver with four independent 8-bit bidirectional channels, 3-state outputs, bus hold on all data inputs, and TTL-compatible I/O levels. It supports mixed-voltage interfacing (3.3 V core to 5 V buses), delivers ±64 mA output drive, and operates from −40 °C to +85 °C in LFBGA96 packaging. It is used in high-speed backplane and motherboard data routing where signal integrity and hot-swap capability are required.

For engineers reviewing the 74LVTH32245EC,518 datasheet, 74LVTH32245EC,518 pinout, 74LVTH32245EC,518 application, or 74LVTH32245EC,518 equivalent, key selection criteria include its 3.3 V BiCMOS architecture, four nDIR/nOE control pairs for channel isolation, bus-hold input retention, live insertion support, and 1.0 ns typical propagation delay at 3.3 V.

Technical Context

The 74LVTH32245EC,518 implements four independent 8-bit bidirectional transceiver sections, each controlled by dedicated nDIR (direction) and nOE (output enable) pins. Its BiCMOS process enables TTL-level input thresholds and 5 V-tolerant I/O while operating from a 3.3 V supply.

Each channel supports simultaneous send/receive isolation via high-impedance 3-state outputs, and bus-hold circuitry maintains valid logic states on unused inputs without external pull-ups. Power-up 3-state prevents bus contention during power sequencing.

Key Specifications

Pinout & Package

LFBGA96 package: plastic low-profile fine-pitch ball grid array, 13.5 mm × 5.5 mm × 1.05 mm body, 96 solder balls, 0.5 mm pitch, JEDEC SOT536-1 outline.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit bus transceiver applications.

Compared with SN74LVT32245GQLR and 74ALVCH32245QBJ, the 74LVTH32245EC,518 uniquely combines 5 V-tolerant I/O, integrated bus-hold, and ±64 mA drive in a single industrial-temperature LFBGA96 package-making it optimal for robust, mixed-voltage, hot-pluggable bus architectures.

Availability

74LVTH32245EC,518 is available at Aetrix Electronics and suitable for industrial PLC backplanes, embedded memory interfaces, automated test equipment, and high-reliability communications chassis requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVTH32245EC,518 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 74LVTH32245EC,518 belongs to NXP's LVTH logic family, engineered for high-speed, low-voltage bus interfacing in industrial and telecom infrastructure where reliability, hot-swap capability, and mixed-voltage interoperability are essential.

FAQ

What is the maximum clock frequency supported by the 74LVTH32245EC,518 in a 32-bit data path?

The 74LVTH32245EC,518 does not operate on a clock signal-it is an asynchronous transceiver. Its usable data rate is determined by propagation delay and system timing margins. With 1.0 ns typical tPLH/tPHL at 3.3 V, it supports reliable operation in systems with >200 MHz bus toggle rates, assuming proper PCB layout and load management. The 74LVTH32245EC,518 datasheet specifies no maximum frequency limit because it functions independently of clock domains.

Does the 74LVTH32245EC,518 require external pull-up resistors on its data inputs?

No, the 74LVTH32245EC,518 includes integrated bus-hold circuitry on all A and B port inputs, providing ±75 µA holding current to maintain valid logic states on unused or floating inputs. This eliminates the need for external pull-up or pull-down resistors, reducing BOM count and PCB space. The 74LVTH32245EC,518 bus-hold feature is active at all times within recommended operating conditions.

Can the 74LVTH32245EC,518 safely interface between a 3.3 V FPGA and a 5 V peripheral?

Yes, the 74LVTH32245EC,518 supports 5 V-tolerant inputs and outputs while powered from 3.3 V. Its VI range extends to 5.5 V, and VO can swing up to 7.0 V under clamp conditions. When driving a 5 V peripheral, the 74LVTH32245EC,518 delivers VOH ≥ 2.4 V (at VCC = 2.7 V, IOH = −8 mA), meeting TTL HIGH-level requirements. No external level-shifting components are needed.

What is the thermal performance of the 74LVTH32245EC,518 in continuous operation?

The 74LVTH32245EC,518 has a maximum junction temperature (Tj) rating of 150 °C and a total power dissipation limit of 1000 mW. At typical operating conditions (VCC = 3.3 V, Tamb = 25 °C), ICC is 0.14 mA with outputs disabled. Under full 32-bit drive at 64 mA per output, thermal design must account for package-specific θJA (~40 °C/W for LFBGA96 on 2-layer board). Derating begins above 70 °C ambient at 1.8 mW/K. The 74LVTH32245EC,518 thermal characteristics are fully specified in Section 8 of its NXP datasheet.

Is the 74LVTH32245EC,518 pin-compatible with other members of the LVTH family?

The 74LVTH32245EC,518 shares the same LFBGA96 (SOT536-1) package and functional pinout with other 32-bit LVTH transceivers like the 74LVTH322245, but differs in channel count and control logic. It is not pin-compatible with 16-bit variants (e.g., 74LVTH162245) due to differing ball assignments and internal partitioning. Always verify pin mapping against the specific device's datasheet-74LVTH32245EC,518 pin descriptions are defined in Table 2 of its NXP product data sheet.