Nexperia USA Inc. 74AVC4TD245BQ,115

Overview

74AVC4TD245BQ,115 from Nexperia is a 4-bit dual-supply bidirectional voltage-level translating transceiver with independent A- and B-side supplies (VCC(A) and VCC(B)), eight I/O ports (A1–A4, B1–B4), four direction controls (DIR1–DIR4), and active-low output enable (OE). It supports translation between 0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V domains, delivers up to 380 Mbit/s data rate (≥1.8 V ↔ 3.3 V), and features IOFF circuitry for partial power-down isolation in mixed-voltage SoC interconnects.

For engineers reviewing the 74AVC4TD245BQ,115 datasheet, 74AVC4TD245BQ,115 pinout, 74AVC4TD245BQ,115 application, or 74AVC4TD245BQ,115 equivalent, key selection criteria include dual-rail supply flexibility, per-bit directional control, suspend-mode high-impedance behavior when either VCC is at GND, JEDEC-compliant low-voltage operation, and guaranteed timing across –40 °C to +125 °C.

Technical Context

This transceiver implements true bidirectional level translation using separate input-referenced supply domains: An, DIRn, and OE pins are referenced to VCC(A); Bn pins are referenced to VCC(B). Each of the four 1-bit channels operates independently under its own DIRn control, enabling asymmetric data flow (e.g., A→B on channel 1, B→A on channel 2).

The IOFF circuit enforces high-impedance OFF-state on both An and Bn terminals when either VCC(A) or VCC(B) is at GND, preventing backflow current during system suspend or hot-swap events. Propagation delays range from 0.2 ns (min, high-VCC conditions) to 15.6 ns (max, worst-case –40 °C to +125 °C, low-VCC), with disable/enable times tightly specified across all voltage combinations.

Key Specifications

Pinout & Package

DHVQFN16 package (SOT763-1), 2.5 × 3.5 × 0.85 mm body, thermally enhanced, no leads, exposed die pad (non-soldered or floating/grounded per layout).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AVC4T245RGYR and 74LVC4T245GM,132, the 74AVC4TD245BQ,115 uniquely combines extended temperature range, guaranteed IOFF behavior, and JEDEC multi-standard compliance - making it the only option qualified for automotive powertrain and industrial safety-critical interfaces.

Availability

74AVC4TD245BQ,115 is available at Aetrix Electronics and suitable for PCIe add-in cards, automotive ADAS sensor hubs, FPGA-ASIC interposers, and industrial PLC I/O expansion requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for 74AVC4TD245BQ,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 leading Dutch semiconductor manufacturer specializing in high-performance, high-reliability logic, analog, and discrete components, with a focus on automotive, industrial, and computing markets.

The 74AVC logic family is engineered for ultra-low-voltage operation (down to 0.8 V) and high-speed bidirectional translation in heterogeneous SoC architectures, targeting next-generation energy-efficient systems with aggressive power gating.

FAQ

Can 74AVC4TD245BQ,115 translate between 0.8 V and 3.3 V simultaneously?

Yes. VCC(A) and VCC(B) may be independently set to 0.8 V and 3.3 V respectively. The device guarantees 380 Mbit/s data rate and valid logic thresholds across this combination, with VIH/VIL levels scaled to each supply (e.g., VIH(A) = 0.65 × VCC(A), VIH(B) = 0.65 × VCC(B)). No external biasing or level-shifting resistors are required.

What happens to the I/O pins when VCC(A) = 0 V and VCC(B) = 3.3 V?

In this suspend condition, both A1–A4 and B1–B4 enter high-impedance OFF-state due to internal IOFF circuitry. Input leakage remains ≤±5 μA, and no backflow current flows from the 3.3 V B-side into the unpowered A-side - satisfying IEC 61000-4-2 and automotive hot-swap requirements.

Is the DHVQFN16 package (SOT763-1) lead-free and RoHS compliant?

Yes. The 74AVC4TD245BQ,115 uses a lead-free, halogen-free, RoHS-compliant DHVQFN16 package (SOT763-1) with NiPdAu terminal finish. It meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) and is qualified for reflow soldering per IPC/JEDEC J-STD-020 Rev F.

How does DIR control interact with OE in 74AVC4TD245BQ,115?

OE is prioritized over DIR: when OE is HIGH, all A/B ports are forced into 3-state regardless of DIR states. When OE is LOW, each channel's direction is determined solely by its corresponding DIRn input (e.g., DIR1 = HIGH enables A1→B1; DIR1 = LOW enables B1→A1). This hierarchical control simplifies bus arbitration logic in multi-master systems.