Nexperia USA Inc. 74VHC245BQ,115

Overview

74VHC245BQ,115 from Nexperia is a high-speed CMOS octal bus transceiver with non-inverting 3-state outputs in both directions, featuring DIR and active-low OE control inputs for bidirectional data flow management in 3.3 V or 5 V systems. It operates from -40 °C to +125 °C, supports 8-bit parallel bus isolation, and delivers propagation delay as low as 3.5 ns (VCC = 4.5–5.5 V, CL = 15 pF).

For engineers reviewing the 74VHC245BQ,115 datasheet, 74VHC245BQ,115 pinout, 74VHC245BQ,115 application, or 74VHC245BQ,115 equivalent, this device serves as a voltage-level-flexible, low-power bus interface for microcontroller peripheral expansion, memory-mapped I/O, and FPGA-to-ASIC data bridging where direction-controlled 3-state drive is required.

Technical Context

The 74VHC245BQ implements dual-directional 8-bit data transfer using a single DIR input to select A→B or B→A path, while OE independently enables/disables all outputs into high-impedance state. Its CMOS input structure accepts voltages up to VCC + 0.5 V and includes Schmitt-trigger action on all inputs for noise immunity.

Designed for mixed-voltage system interfacing, it maintains TTL-compatible input thresholds only in the 74VHCT variant; the 74VHC245BQ uses true CMOS input levels (VIH ≥ 3.85 V at VCC = 5.5 V), enabling robust operation across 2.0–5.5 V supply range with static current under 80 μA at 5.5 V.

Key Specifications

Pinout & Package

DHVQFN20 package (SOT764-1): 2.5 × 4.5 × 0.85 mm body, 20-terminal no-lead quad flat design with exposed thermal pad (non-soldered by default); optimized for high-density PCB layouts and improved thermal performance over SO20/TSSOP variants.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVC245ABQ,115, the 74VHC245BQ,115 offers broader voltage interoperability and 5 V tolerance at modest speed trade-off; versus SN74LVCH245AQPWRQ1, it provides identical functionality at lower cost and shorter lead time for non-automotive use cases.

Availability

74VHC245BQ,115 is available at Aetrix Electronics and suitable for industrial automation controllers, medical diagnostic equipment interfaces, and telecom baseband processing modules requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 74VHC245BQ,115 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 focused on high-volume, high-reliability logic, analog, and MOSFET components for industrial, consumer, and communications markets.

The 74VHC series targets general-purpose digital interfacing with emphasis on low power, wide supply range, and robust ESD performance - designed specifically for space-constrained, thermally demanding embedded systems needing dependable bus control.

FAQ

Can the 74VHC245BQ,115 operate with a 2.5 V supply?

Yes - the 74VHC245BQ,115 is fully specified down to 2.0 V VCC. At 2.5 V, VIH is guaranteed ≥ 1.7 V and VOL ≤ 0.55 V (IO = 4 mA), supporting reliable interface with 2.5 V logic families. Propagation delay increases to ~10.5 ns (CL = 15 pF), consistent with datasheet Table 7.

Is the thermal pad on the DHVQFN20 package required to be soldered?

No - per datasheet Section 5.1, the exposed pad (terminal 1 index area) has no electrical or mechanical requirement to be soldered. If connected, it must remain electrically floating or tied to GND; soldering without proper thermal relief may cause solder voiding or package warpage during reflow.

What is the maximum capacitive load the 74VHC245BQ,115 can drive reliably?

The device is characterized up to 50 pF (Table 7), with tpd and timing margins maintained across temperature and voltage. Driving >50 pF risks violating setup/hold windows in synchronous systems; for heavier loads, add series termination or reduce trace length to limit effective capacitance.

Does the 74VHC245BQ,115 support hot-swap insertion?

Its overvoltage-tolerant inputs (VI up to VCC + 0.5 V) and high-impedance OFF-state (IOZ ≤ ±10 μA) provide partial hot-swap resilience, but the device lacks dedicated hot-swap circuitry (e.g., slew-rate control, undervoltage lockout). Use with external current limiting and controlled power sequencing is recommended for live-insertion scenarios.