Texas Instruments SN74AVC32T245NMJR

Overview

SN74AVC32T245NMJR from Texas Instruments is a 32-bit dual-supply bus transceiver with configurable voltage translation, level-shifting, and tri-state outputs. It supports bidirectional data flow between A and B ports, operates across 1.2 V to 3.6 V on both VCCA and VCCB rails, delivers up to 380 Mbps (1.8 V → 3.3 V), and features VCC isolation and Ioff for partial-power-down operation. It enables low-voltage interconnect in mixed-supply SoC interfaces.

For engineers reviewing the SN74AVC32T245NMJR datasheet, SN74AVC32T245NMJR pinout, SN74AVC32T245NMJR application, or SN74AVC32T245NMJR equivalent, key selection criteria include dual-rail voltage flexibility (1.2–3.6 V per port), 96-pin nFBGA package compatibility, guaranteed 4.6 V tolerant I/Os, and support for asynchronous bidirectional translation without external logic.

Technical Context

The SN74AVC32T245NMJR implements four independent 8-bit transceiver channels (1DIR–4DIR, 1OE–4OE), each with direction-controlled, tri-stateable I/Os referenced to separate VCCA (A-port) and VCCB (B-port) supplies. Control inputs (DIR, OE) are referenced solely to VCCA, ensuring consistent enable logic regardless of B-port voltage.

Its architecture enables true bidirectional level-shifting: data propagates A→B or B→A based on DIR state, while OE independently places all outputs in high-impedance mode. The VCC isolation feature forces both ports into high-Z if either VCCA or VCCB is at GND, preventing backdrive during power sequencing.

Key Specifications

Pinout & Package

nFBGA package, 96-pin, 13.50 mm × 5.50 mm body size, 0.5 mm pitch. Pin assignment follows TI standard layout for SN74AVC32T245 family with dedicated VCCA/VCCB pairs per quadrant and grouped DIR/OE controls.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AVC32T245NMJR, the SN74AVCH16T245DGGR offers half the channel density and reduced robustness features, while the SN74LVC4245APWR lacks dual-supply capability entirely - making SN74AVC32T245NMJR uniquely suited for high-density, mixed-voltage, fault-tolerant system interconnects.

Availability

SN74AVC32T245NMJR is available at Aetrix Electronics and suitable for industrial automation, automotive ADAS sensor hubs, and enterprise SSD controller interfaces requiring stable component supply and long-term lifecycle support.

Supply support for SN74AVC32T245NMJR 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies with over 90 years of innovation in high-reliability components.

The SN74AVC32T245NMJR belongs to TI's Widebus+™ family of advanced bus interface devices, engineered specifically for low-voltage, high-speed, mixed-domain digital interconnect in space-constrained, thermally demanding applications.

FAQ

What is the maximum supported data rate for SN74AVC32T245NMJR when translating from 1.8 V to 3.3 V?

The SN74AVC32T245NMJR supports a maximum data rate of 380 Mbps when translating signals from a 1.8 V domain to a 3.3 V domain, as specified in the official Texas Instruments datasheet SCES553H. This performance is achievable under recommended operating conditions with proper PCB layout and termination.

Does SN74AVC32T245NMJR support independent power-down of A and B ports?

Yes, the SN74AVC32T245NMJR supports independent power-down via its Ioff feature: when either VCCA or VCCB is at 0 V, the corresponding port's I/Os enter a high-impedance state with leakage ≤ ±5 μA, preventing damaging current backflow. This behavior is confirmed in Section 5 of the datasheet.

What is the thermal resistance (RθJA) of the SN74AVC32T245NMJR nFBGA package?

The junction-to-ambient thermal resistance (RθJA) for the SN74AVC32T245NMJR in its 96-pin nFBGA package is 26.7 °C/W, as documented in Table 7-3 of the TI datasheet SCES553H. This value assumes standard JEDEC 2-layer board conditions and guides heatsink or airflow requirements for thermal design.

Can SN74AVC32T245NMJR safely interface a 1.2 V microcontroller with a 3.3 V FPGA I/O bank?

Yes, the SN74AVC32T245NMJR is explicitly designed for this use case: VCCA can be set to 1.2 V (for MCU side) and VCCB to 3.3 V (for FPGA side), with 4.6 V tolerant I/Os on both ports. Its level-shifting architecture ensures correct logic thresholds and timing integrity without external components.

How many direction-control and output-enable inputs does SN74AVC32T245NMJR have?

The SN74AVC32T245NMJR has four direction-control inputs (1DIR, 2DIR, 3DIR, 4DIR) and four output-enable inputs (1OE, 2OE, 3OE, 4OE), each controlling an independent 8-bit channel. All control inputs are referenced to VCCA, as verified in Table 6-2 of the TI datasheet SCES553H.