Nexperia USA Inc. 74LVCH245ADB,118

Overview

74LVCH245ADB,118 from Nexperia is an octal 3-state bus transceiver with bidirectional data flow controlled by DIR and active-low OE inputs, operating from 1.2 V to 3.6 V supply, supporting mixed-voltage translation (3.3 V ↔ 5 V), featuring bus hold on all A-side data inputs, and rated for -40 °C to +125 °C ambient operation in SO20 package.

For engineers reviewing the 74LVCH245ADB,118 datasheet, 74LVCH245ADB,118 pinout, 74LVCH245ADB,118 application, or 74LVCH245ADB,118 equivalent, this device serves as a level-shifting bidirectional interface between voltage domains in industrial control backplanes, FPGA I/O expansion buses, and legacy microcontroller peripheral interconnects where bus stability and partial power-down safety are required.

Technical Context

This transceiver implements CMOS logic with Schmitt-trigger inputs for noise immunity and slow-edge tolerance, enabling robust operation in electrically noisy environments. Its IOFF circuitry actively disables outputs during power-down, blocking damaging backflow current when VCC = 0 V.

The 74LVCH245A variant includes bus hold on all eight A-side data inputs (A0–A7), eliminating external pull resistors in floating-bus scenarios. Direction control is synchronous and transparent: when OE = LOW, data flows A→B if DIR = LOW or B→A if DIR = HIGH; OE = HIGH forces all outputs into high-impedance state regardless of DIR.

Key Specifications

Pinout & Package

74LVCH245ADB,118 uses the SOT163-1 (SO20) plastic small outline package: 20-pin, 7.5 mm body width, 1.27 mm pitch, gull-wing leads, JEDEC MS-013 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVCH245ADB,118, the 74LVC245ADB,118 saves ~1.2 μA per A-input in static mode but adds eight external resistors; SN74LVC245APWR offers 30 % smaller PCB area but lacks bus hold and requires tighter thermal management due to reduced copper exposure in TSSOP.

Availability

74LVCH245ADB,118 is available at Aetrix Electronics and suitable for industrial automation backplanes, FPGA I/O expansion subsystems, and hot-swappable module interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVCH245ADB,118 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, reliable logic, analog, and MOSFET solutions optimized for efficiency, miniaturization, and robustness in demanding applications.

The 74LVCH245A belongs to Nexperia's LVC/LVCH logic family, engineered specifically for low-voltage, mixed-signal interfacing in industrial, computing, and communications systems where voltage translation, bus stability, and power-down safety are critical.

FAQ

What is the maximum input voltage the 74LVCH245ADB,118 can tolerate on its A-side pins?

The A-side inputs (A0–A7) are overvoltage tolerant up to 5.5 V regardless of VCC level, allowing direct connection to 5 V TTL or CMOS outputs while the device operates from 1.2 V to 3.6 V. This rating is specified in Table 5 (Recommended Operating Conditions) and verified under absolute maximum ratings (Table 4).

Does the 74LVCH245ADB,118 support partial power-down operation?

Yes - it features integrated IOFF circuitry that disables all outputs and blocks backflow current when VCC = 0 V, even if input or output pins are driven to 5.5 V. This is confirmed in Section 1 (General description) and Table 6 (Static characteristics), where IOFF leakage is specified at ±10 μA max.

How does bus hold functionality behave on the 74LVCH245ADB,118?

Bus hold is implemented only on A0–A7 inputs (not B0–B7 or control pins), sustaining the last valid logic state with ±75 μA holding current at VCC = 3.0 V. It automatically disables when VI exceeds VCC, permitting safe 5.5 V input operation without contention - detailed in Table 6 footnotes [4] and [5].

Can the 74LVCH245ADB,118 be used in a 5 V-only system?

No - its absolute maximum VCC is +6.5 V, but recommended operation is strictly 1.2 V to 3.6 V. While inputs tolerate 5.5 V, powering VCC at 5 V violates specification and risks parametric failure or accelerated wear. For 5 V systems, use 74HC245 or 74HCT245 instead.