Texas Instruments AVC8T245PWR-D

Overview

AVC8T245PWR-D from Texas Instruments is an 8-bit dual-supply bus transceiver enabling bidirectional voltage-level translation between 1.2 V–3.6 V domains. It features configurable VCCA/VCCB rails, 3-state outputs controlled by DIR and OE inputs referenced to VCCA, Ioff support for partial power-down, and 4.6-V I/O tolerance. It is used in low-voltage interconnects between mixed-supply subsystems such as processor-to-peripheral interfaces in portable electronics.

For engineers reviewing the AVC8T245PWR-D datasheet, AVC8T245PWR-D pinout, AVC8T245PWR-D application, or AVC8T245PWR-D equivalent, key selection criteria include dual-rail operating range (1.2 V–3.6 V per rail), 320 Mbps max data rate at ≥1.8 V supplies, VCC isolation behavior, Ioff leakage specification (<±5 µA), and TSSOP-24 package compatibility with space-constrained PCB layouts.

Technical Context

The AVC8T245PWR-D implements asynchronous bidirectional data flow via a direction-control (DIR) input that selects A→B (DIR = high) or B→A (DIR = low), while output-enable (OE) independently places all I/Os in high-impedance state. Control logic (DIR, OE) is strictly referenced to VCCA, decoupling control signaling from B-port supply conditions.

Its dual-rail architecture supports independent operation of A-port (VCCA-referenced) and B-port (VCCB-referenced) across overlapping 1.2 V–3.6 V ranges, enabling translation between any pair of standard low-voltage nodes (e.g., 1.2 V ↔ 1.8 V, 1.8 V ↔ 3.3 V). VCC isolation ensures both ports enter high-Z when either VCCA or VCCB = GND, preventing backdrive during power sequencing.

Key Specifications

Pinout & Package

TSSOP-24 package (7.8 mm × 6.4 mm), lead pitch 0.65 mm, thermally enhanced with exposed pad (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC8T245PW and TXS0108EPW, the AVC8T245PWR-D uniquely delivers true dual-supply translation with VCC isolation and 320 Mbps performance - making it the only option for high-speed, mixed-voltage, DIR-controlled parallel bus applications requiring fail-safe power sequencing.

Availability

AVC8T245PWR-D is available at Aetrix Electronics and suitable for mobile processor interfaces, industrial sensor hubs, automotive infotainment backplanes, and enterprise SSD controller bridges requiring stable component supply across extended temperature and mixed-voltage design constraints.

Supply support for AVC8T245PWR-D 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.

The AVC8T245 product line targets high-speed, low-voltage bidirectional bus translation in space- and power-constrained systems where mixed-supply domain interoperability is essential - especially in portable computing, automotive infotainment, and industrial IoT edge nodes.

FAQ

What voltage ranges does the AVC8T245PWR-D support on its A and B ports?

The AVC8T245PWR-D supports independent supply voltages from 1.2 V to 3.6 V on both VCCA (A port) and VCCB (B port). This allows translation between any standard low-voltage logic nodes - including 1.2 V ↔ 1.5 V, 1.2 V ↔ 1.8 V, 1.8 V ↔ 2.5 V, and 2.5 V ↔ 3.3 V - without external components. The device remains fully functional even when VCCA and VCCB differ by up to 2.4 V.

How does the VCC isolation feature work in the AVC8T245PWR-D?

The VCC isolation feature in the AVC8T245PWR-D forces all A- and B-port I/Os into high-impedance state whenever either VCCA or VCCB is driven to GND - even if the other supply remains active. This prevents back-driving of unpowered domains during power-up/down sequencing. The behavior is hardware-enforced and requires no external circuitry or software intervention, making it ideal for systems with staggered rail activation.

Can the AVC8T245PWR-D be used in partial power-down mode, and what is its Ioff specification?

Yes, the AVC8T245PWR-D supports partial power-down mode via its Ioff circuitry. When either VCCA or VCCB is at 0 V, the Ioff function limits leakage current into or out of any I/O pin to ±5 µA maximum across –40°C to +125°C. This prevents damaging back-current flow in battery-backed or hot-swap applications, and is explicitly characterized in the Electrical Characteristics table of the AVC8T245PWR-D datasheet.

What is the maximum data rate supported by the AVC8T245PWR-D, and under what conditions?

The AVC8T245PWR-D supports up to 320 Mbps maximum data rate, but only when both VCCA and VCCB are ≥1.8 V. At lower supply voltages (e.g., VCCA < 1.8 V or VCCB < 1.8 V), the maximum data rate drops to 170 Mbps. These values are measured under specified load and transition conditions and are guaranteed across the full operating temperature range.

Is the AVC8T245PWR-D pin-compatible with other '245-family transceivers like the SN74LVC8T245?

No, the AVC8T245PWR-D is not pin-compatible with SN74LVC8T245 or other single-supply '245 devices. While both use TSSOP-24 packages, the AVC8T245PWR-D requires two independent supplies (VCCA, VCCB) and dedicates pins 1 and 23–24 accordingly - whereas SN74LVC8T245 uses a single VCC pin (pin 1) and has different pin assignments for ground and supplies. Direct replacement would require PCB redesign.