Nexperia USA Inc. 74LVC4245ADB,112

Overview

74LVC4245ADB,112 from Nexperia is an octal dual-supply translating transceiver with 3-state bus-compatible outputs in both directions, designed to interface 3 V and 5 V buses in mixed-voltage systems. It features independent VCCA (1.5–5.5 V) and VCCB (1.5–3.6 V) supplies, active-low OE control, DIR-based bidirectional data flow, and Schmitt-trigger inputs for noise immunity - deployed in industrial I/O expansion and legacy-to-modern bus bridging.

For engineers reviewing the 74LVC4245ADB,112 datasheet, 74LVC4245ADB,112 pinout, 74LVC4245ADB,112 application, or 74LVC4245ADB,112 equivalent, this device supports voltage translation between 3.3 V microcontrollers and 5 V peripherals while maintaining bus isolation, low power consumption (<10 μA ICC at standby), and JEDEC JESD8B/JESD36 compliance - critical for mixed-signal embedded designs requiring level-shifting integrity.

Technical Context

The 74LVC4245ADB,112 implements a true bidirectional translation architecture where DIR selects data direction (A→B or B→A) and OE enables/disables all outputs simultaneously into high-impedance state. Its dual-supply design enforces VCCA ≥ VCCB during normal operation, with zero-current path between supplies when either rail is at 0 V - enabling safe suspend mode behavior.

Schmitt-trigger inputs tolerate slow-rising signals (Δt/ΔV down to 10 ns/V), and overvoltage-tolerant control pins (OE, DIR) accept up to 5.5 V regardless of VCCB level. The device guarantees propagation delays as low as 1.0 ns (tPHL/tPLH) at VCCB = 3.3 V and VCCA = 5.0 V, with output skew ≤1.5 ns across all eight channels.

Key Specifications

Pinout & Package

74LVC4245ADB,112 is packaged in SO24 (SOT137-1), a plastic small outline package with 24 leads and 7.5 mm body width. Pin 1 index located at top-left corner; lead pitch 1.27 mm; RoHS-compliant, halogen-free construction.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-supply translating transceiver applications.

Compared with SN74LVC4245APWRE4 and 74AVC4245BQ,115, the 74LVC4245ADB,112 offers superior thermal robustness in SO24, guaranteed 5 V bus compatibility, and broader industrial temperature support - making it optimal for high-reliability, mixed-voltage infrastructure where package reliability and voltage range outweigh density or nanosecond-scale speed gains.

Availability

74LVC4245ADB,112 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, embedded MCU bus bridging, automotive body control modules, and test equipment signal conditioning requiring stable component supply across extended temperature ranges and mixed-voltage environments.

Supply support for 74LVC4245ADB,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, high-reliability logic, analog, and MOSFET solutions with leadership in efficiency, miniaturization, and robustness - serving industrial, automotive, and computing markets.

The 74LVC4245ADB,112 belongs to Nexperia's LVC (Low-Voltage CMOS) logic family, engineered specifically for voltage translation and bus isolation in mixed-supply embedded systems - emphasizing JEDEC compliance, ESD resilience, and extended-temperature operation.

FAQ

Can 74LVC4245ADB,112 operate with VCCA = 3.3 V and VCCB = 3.3 V?

Yes - the device supports identical supply voltages on both sides (VCCA = VCCB = 3.3 V) and functions as a standard octal 3-state transceiver. Direction control (DIR) and output enable (OE) remain fully operational, and all AC/DC specifications apply per the datasheet's recommended operating conditions table.

What happens if VCCA is powered before VCCB during startup?

Per datasheet Section 1, no current flows between supplies in suspend mode when either VCCA or VCCB is 0 V. However, applying VCCA before VCCB may cause undefined output states until VCCB stabilizes. Recommended power sequencing is simultaneous or VCCB-first to ensure predictable initialization of Schmitt-trigger inputs and internal logic.

Is the OE pin truly active-low, and does it affect both A and B ports simultaneously?

Yes - OE is active-low and asserts high-impedance on all 16 I/O pins (A0–A7 and B0–B7) simultaneously, regardless of DIR state. This behavior is confirmed in Table 3 (Functional Table) and Figure 2 (Logic Diagram), ensuring complete bus isolation during arbitration or power-down sequences.

Does the 74LVC4245ADB,112 support hot-swap insertion into a live 5 V bus?

Yes - its 5 V-tolerant inputs/outputs, zero-current suspend mode, and overvoltage-tolerant control pins (OE, DIR up to 5.5 V) allow safe insertion into a powered 5 V bus. However, VCCB must be applied before or concurrently with VCCA to avoid violating VCCA ≥ VCCB during transition, as specified in Section 1.