Nexperia USA Inc. 74LVT245D,112

Overview

74LVT245D,112 from Nexperia is an 8-bit bidirectional 3-state transceiver with independent direction (DIR) and output enable (OE) controls, operating from 2.7 V to 3.6 V supply. It features bus-hold inputs eliminating external pull-ups, overvoltage-tolerant inputs up to 5.5 V, and ±64 mA/–32 mA output drive capability. Used in 3.3 V system-level bus interfacing between microcontrollers and peripheral ICs.

For engineers reviewing the 74LVT245D,112 datasheet, 74LVT245D,112 pinout, 74LVT245D,112 application, or 74LVT245D,112 equivalent, key selection criteria include bidirectional data flow control, 3-state timing (tPLZ = 4.8 ns max), bus-hold functionality, and SO20 package compatibility with legacy 74-series layouts.

Technical Context

This BiCMOS transceiver implements dual-rail logic compatibility: inputs tolerate 5.5 V while operating at 3.3 V VCC, enabling direct TTL-level interfacing without level shifters. DIR and OE pins operate independently-DIR selects A→B or B→A data flow, while OE places all outputs in high-impedance state regardless of DIR state.

The device integrates IOFF circuitry for partial power-down operation and latch-up protection exceeding 500 mA per JESD78 Class II Level A. Bus-hold current (IBHL = 75–150 μA, IBHH = –150 to –75 μA) actively maintains unused input states without external biasing.

Key Specifications

Pinout & Package

74LVT245D,112 uses the SO20 (SOT163-1) plastic small outline package: 20-pin, 7.5 mm body width, 1.27 mm lead pitch, gull-wing leads, JEDEC MS-013 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC245APWR and 74ALVC245MTCX, the 74LVT245D,112 uniquely combines 5.5 V input tolerance, integrated bus-hold, and ±64 mA drive-making it the only option among the three qualified for industrial backplane interfaces with unpopulated slots and mixed-voltage peripherals.

Availability

74LVT245D,112 is available at Aetrix Electronics and suitable for industrial PLC backplanes, embedded microcontroller expansion buses, automated test equipment signal routing, and industrial HMI touch controller interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVT245D,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 optimized for efficiency, reliability, and manufacturability in industrial and automotive applications.

The 74LVT series targets high-speed, mixed-voltage digital interfacing in industrial control and communications systems, emphasizing robustness, bus-hold stability, and seamless integration with legacy 5 V infrastructure.

FAQ

Can 74LVT245D,112 be used to interface a 3.3 V FPGA with a 5 V ADC?

Yes. Its inputs tolerate up to 5.5 V regardless of VCC, allowing direct connection of the ADC's 5 V data outputs to the B-port. The FPGA drives the A-port at 3.3 V, and DIR/OE provide full control over data direction and bus isolation. No external level shifters are needed.

Does 74LVT245D,112 require external pull-up resistors on unused A-port pins?

No. Integrated bus-hold circuitry actively maintains the last valid logic state on floating A0–A7 inputs using ±75–150 μA feedback current. This eliminates the need for external 10 kΩ pull resistors, reducing component count and PCB area in modular designs with configurable I/O.

What is the maximum clock/data rate supported by 74LVT245D,112?

Based on tPLH/tPHL ≤ 4.0 ns (max) and tPZH/tPHZ ≤ 5.9 ns (max) at 3.3 V, the device supports reliable data transfer up to approximately 100 MHz for burst-mode transfers. System-level timing must account for trace capacitance and load; typical sustained throughput is 80 Mbps in well-designed 50 pF bus environments.

Is 74LVT245D,112 suitable for hot-swap applications in modular chassis systems?

Yes. It is explicitly qualified for live insertion/extraction per JESD78 Class II Level A (latch-up immunity >500 mA) and features IOFF circuitry that blocks current flow when VCC = 0 V. Combined with power-up 3-state behavior, this prevents bus contention and backfeeding during module replacement under power.