Texas Instruments SN74AVC32T245ZKER

Overview

SN74AVC32T245ZKER from Texas Instruments is a 32-bit dual-supply bus transceiver enabling bidirectional voltage translation between 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V domains. It features configurable A/B port rails (VCCA/VCCB), 4.6 V tolerant I/Os, VCC isolation, Ioff partial-power-down support, and tri-state outputs controlled by DIR/OE pins referenced to VCCA. It serves in low-voltage interconnects between SoC, memory, and peripheral buses in portable computing and industrial control systems.

For engineers reviewing the SN74AVC32T245ZKER datasheet, SN74AVC32T245ZKER pinout, SN74AVC32T245ZKER application, or SN74AVC32T245ZKER equivalent, key selection criteria include dual-rail level-shifting capability across 1.2–3.6 V, 380 Mbps max data rate (1.8 V → 3.3 V), VCC isolation behavior, Ioff leakage < 5 µA at 0 V supply, and LFBGA-96 package compatibility with high-density PCB layouts.

Technical Context

The SN74AVC32T245ZKER implements four independent 8-bit transceiver channels (1DIR–4DIR, 1OE–4OE), each supporting asynchronous bidirectional data flow with direction determined per-channel by DIR and output enable controlled by OE. All control inputs (DIR/OE) are referenced to VCCA, ensuring consistent logic thresholds regardless of VCCB level.

Its dual-rail architecture enables simultaneous operation of A-port (VCCA-referenced) and B-port (VCCB-referenced) I/Os across independent 1.2 V to 3.6 V supplies. The VCC isolation feature forces both ports into high-impedance when either VCCA or VCCB is at GND, preventing backdrive during power sequencing.

Key Specifications

Pinout & Package

LFBGA-96 package (13.50 mm × 5.50 mm, 0.8 mm pitch), RoHS-compliant, moisture sensitivity level 3. Pin count and layout match TI's standard 96-pin widebus transceiver footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AVC32T245ZRL and SN74AVC32T245NMJ, the SN74AVC32T245ZKER provides optimal thermal performance (lowest RθJA) in the standard LFBGA-96 form factor, making it preferred for high-throughput, thermally demanding applications such as SSD controllers and multi-core SoC interconnects.

Availability

SN74AVC32T245ZKER is available at Aetrix Electronics and suitable for mobile SoC interconnect, industrial PLC backplane, enterprise SSD controller, and automotive ADAS domain controller applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for SN74AVC32T245ZKER 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 industrial, automotive, and consumer electronics.

The SN74AVC32T245ZKER belongs to TI's Widebus+™ family of advanced bus interface devices, engineered specifically for low-voltage, high-speed, mixed-domain system interconnect in space- and power-constrained applications.

FAQ

What is the maximum supported data rate for SN74AVC32T245ZKER in 1.8 V to 3.3 V level-shifting mode?

The SN74AVC32T245ZKER supports a maximum data rate of 380 Mbps when translating signals from a 1.8 V domain to a 3.3 V domain. This value is specified under recommended operating conditions and verified across process/voltage/temperature corners. The SN74AVC32T245ZKER achieves this performance using optimized output drivers and low-propagation-delay internal logic, enabling use in high-speed DDR and PCIe sideband applications.

Does SN74AVC32T245ZKER support partial power-down operation, and how is it implemented?

Yes, the SN74AVC32T245ZKER supports partial power-down via its Ioff circuitry. When either VCCA or VCCB is at 0 V, the Ioff feature disables all outputs and limits leakage current to ±5 µA maximum, preventing damaging current backflow between powered and unpowered sections of the system. This behavior is intrinsic to the SN74AVC32T245ZKER silicon design and requires no external circuitry or configuration.

How does the VCC isolation feature function in SN74AVC32T245ZKER, and what is its practical benefit?

The VCC isolation feature in SN74AVC32T245ZKER forces both A and B ports into a high-impedance state whenever either VCCA or VCCB is driven to GND. This ensures electrical isolation during asymmetric power sequencing-such as when one voltage rail powers up before the other. The benefit is elimination of latch-up risk and bus contention in complex power-managed systems, directly improving system reliability without requiring external power-good monitoring.

What package type and dimensions does SN74AVC32T245ZKER use, and is it compatible with standard LFBGA assembly processes?

The SN74AVC32T245ZKER uses a 96-pin LFBGA package measuring 13.50 mm × 5.50 mm with 0.8 mm ball pitch. It conforms to JEDEC MO-275AC standards and is fully compatible with industry-standard LFBGA reflow profiles, stencil design rules, and automated optical inspection (AOI) setups used in high-volume SMT manufacturing.

Are the direction-control (DIR) and output-enable (OE) inputs of SN74AVC32T245ZKER referenced to VCCA or VCCB?

The DIR and OE inputs of SN74AVC32T245ZKER are explicitly referenced to VCCA, as confirmed in the device's pin function table and recommended operating conditions. This means their VIH/VIL thresholds scale with VCCA voltage (e.g., VIH = VCCA × 0.65 for 1.2–1.95 V), ensuring reliable control logic interpretation regardless of VCCB level-a key enabler for mixed-supply system design.