Nexperia USA Inc. 74AVCH4T245GU,115

Overview

74AVCH4T245GU,115 from Nexperia is a 4-bit dual-supply translating transceiver enabling bidirectional level translation between 0.8 V and 3.6 V domains. It operates as two independent 2-bit transceivers or one 4-bit unit, with separate VCC(A) and VCC(B) supplies, active bus hold on all I/Os, and IOFF partial power-down protection. It is used in mixed-voltage SoC interconnects, FPGA-to-ASIC voltage domain bridging, and low-power portable device logic interfaces.

For engineers reviewing the 74AVCH4T245GU,115 datasheet, 74AVCH4T245GU,115 pinout, 74AVCH4T245GU,115 application, or 74AVCH4T245GU,115 equivalent, key selection criteria include configurable direction control (nDIR), dual-rail supply flexibility, bus hold elimination of external resistors, and guaranteed operation across -40 °C to +125 °C with up to 380 Mbit/s data rate.

Technical Context

The device implements two independent 2-bit bidirectional data paths, each controlled by dedicated nDIR and nOE inputs referenced to VCC(A). Signal flow direction is determined solely by nDIR logic level: HIGH enables A→B translation, LOW enables B→A translation. Both ports support simultaneous 3-state output disable via active-low nOE.

Its IOFF circuitry ensures leakage current remains ≤ ±5 μA when either VCC rail is at GND, enforcing true high-impedance isolation during suspend mode. Bus hold circuitry actively maintains valid logic states on floating inputs without external components, with sustaining currents up to ±100 μA at 3.0 V.

Key Specifications

Pinout & Package

XQFN16 package: 1.80 × 2.60 × 0.50 mm, 16-terminal, no leads, thermal pad (non-soldered or floating GND), exposed die pad for enhanced thermal dissipation in space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AVCH4T245PWR, the 74AVCH4T245GU,115 offers 40% smaller footprint and superior thermal performance in compact layouts; versus 74LVC4T245GM,132, it delivers mandatory IOFF protection and guaranteed bus hold activation-critical for industrial reliability and low-power design.

Availability

74AVCH4T245GU,115 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive ADAS camera links, and portable medical device subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AVCH4T245GU,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 delivering high-performance, reliable, and efficient logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74AVCH4T245 belongs to Nexperia's Advanced Very Low-Voltage CMOS (AVC) logic family, engineered specifically for robust mixed-voltage system interfacing with emphasis on ultra-low power, high-speed translation, and fail-safe partial power-down behavior.

FAQ

Can 74AVCH4T245GU,115 translate between 0.8 V and 3.3 V simultaneously?

Yes. VCC(A) may be set to 0.8 V while VCC(B) is set to 3.3 V, enabling bidirectional translation. The device guarantees operation across this full range per JEDEC standards JESD8-12 and JESD8-B, with typical data rates up to 200 Mbit/s in this configuration. Input thresholds scale with respective supply rails, ensuring reliable logic recognition on both sides.

What happens to the B-side I/Os when VCC(B) = 0 V and VCC(A) = 3.3 V?

In this suspend condition, all B-side outputs (1B1, 1B2, 2B1, 2B2) enter high-impedance OFF-state regardless of nDIR or nOE state. The IOFF circuit limits leakage to ≤ ±5 μA, preventing backfeed into the B-side power domain. Bus hold remains active only on the powered A-side; B-side pins float but are protected from latch-up per JESD78 Class II.

Is external termination required for 380 Mbit/s operation?

No external series or parallel termination is required for basic functionality, but for signal integrity at 380 Mbit/s, controlled-impedance PCB routing (50 Ω single-ended) and load capacitance ≤15 pF per line are recommended. The device's typical output capacitance is 4.0 pF, and propagation delay variation remains <100 ps across process/voltage/temperature corners at rated speeds.

How does bus hold behave during power-up sequencing?

Bus hold activates immediately upon VCC(A) or VCC(B) reaching ~0.5 V and remains functional across the full operating range. During asymmetric power-up (e.g., VCC(A) applied before VCC(B)), A-side bus hold stabilizes inputs while B-side remains high-Z until its supply ramps. This prevents metastability and ensures deterministic startup in multi-rail systems.