Texas Instruments SN74AVCBH164245GR

Overview

SN74AVCBH164245 from Texas Instruments is a 16-bit dual-supply bus transceiver with configurable voltage translation, supporting 1.4 V to 3.6 V on both A- and B-ports independently. It enables bidirectional level-shifting between 1.5 V, 1.8 V, 2.5 V, and 3.3 V domains, features Dynamic Output Control (DOC™) for noise reduction without speed penalty, and delivers ±24 mA drive at 2.5 V. It is used in mixed-voltage system interconnects such as FPGA-to-ASIC or SoC-to-peripheral data buses.

For engineers reviewing the SN74AVCBH164245 datasheet, SN74AVCBH164245 pinout, SN74AVCBH164245 application, or SN74AVCBH164245 equivalent, key selection criteria include dual-rail voltage configurability, Ioff partial-power-down support, bus-hold circuitry eliminating external resistors, and TSSOP-48 packaging with JEDEC MO-153 compliance.

Technical Context

This device implements two independent 8-bit transceiver sections (1DIR/1OE and 2DIR/2OE), each with direction-controlled bidirectional data flow between A- and B-ports. Control inputs (DIR, OE) are referenced to VCCB, while data I/Os track their respective supply rails (VCCA for A-port, VCCB for B-port).

The DOC™ circuitry dynamically modulates output impedance during signal transitions-initially lowering it for strong edge drive, then raising it to suppress ringing. Bus-hold circuitry actively maintains valid logic states on unused data inputs, and Ioff protection disables outputs when either VCC is at GND, preventing backflow current.

Key Specifications

Pinout & Package

TSSOP-48 (DGG) package: 12.6 mm × 6.2 mm × 1.2 mm body, 0.5 mm pitch, JEDEC MO-153 compliant, RoHS-compliant NIPDAU lead finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AVCBH164245, SN74AVCH16T245DGGR offers simpler biasing but no voltage translation capability, while TXB0108PWR reduces control pin count at the cost of deterministic direction control and half the data width-making SN74AVCBH164245 optimal for high-bandwidth, mixed-voltage, pin-defined bidirectional systems.

Availability

SN74AVCBH164245 is available at Aetrix Electronics and suitable for FPGA-to-ASIC interconnects, industrial PLC backplanes, and automotive ADAS sensor hubs requiring stable component supply across extended temperature ranges (–40°C to +85°C).

Supply support for SN74AVCBH164245 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 decades of experience in high-reliability interface solutions.

The SN74AVCBH164245 belongs to TI's Widebus™ family, engineered specifically for low-voltage, mixed-domain digital interconnects in space-constrained, thermally demanding applications such as portable computing and automotive electronics.

FAQ

What voltage combinations does SN74AVCBH164245 support between its A- and B-ports?

SN74AVCBH164245 supports any combination of 1.4 V to 3.6 V on VCCA and VCCB, including asymmetric configurations like 1.5 V ↔ 3.3 V or 1.8 V ↔ 2.5 V. The device guarantees full functionality and specified timing across all combinations within this range, with control inputs referenced to VCCB for predictable threshold behavior regardless of A-port voltage.

How does the Dynamic Output Control (DOC™) circuitry in SN74AVCBH164245 improve signal integrity?

DOC™ in SN74AVCBH164245 dynamically lowers output impedance at signal transition onset to deliver strong edge drive, then raises it mid-transition to suppress ringing and overshoot. This reduces simultaneous switching noise by up to 35% compared to fixed-drive transceivers while maintaining propagation delays under 7 ns - critical for clean timing in high-speed parallel buses.

Can SN74AVCBH164245 operate safely if only one supply rail is powered?

Yes. SN74AVCBH164245 includes Ioff circuitry that places both A- and B-ports into high-impedance state when either VCCA or VCCB is at GND. This prevents damaging current backflow and allows safe partial-power-down operation - essential for hot-swap and power-gated subsystems in industrial and automotive applications.

Does SN74AVCBH164245 require external pullup or pulldown resistors on data lines?

No. SN74AVCBH164245 integrates active bus-hold circuitry on all data inputs, which maintains valid logic states on unused or floating lines without external resistors. Using external pullups/pulldowns with bus-hold enabled is explicitly discouraged in the datasheet, as it may cause contention and increased power consumption.

What is the recommended power-up sequence for SN74AVCBH164245 to ensure high-impedance outputs at startup?

To guarantee high-impedance outputs during power-up, OE inputs must be held high until both VCCA and VCCB reach stable operating voltage. TI recommends tying 1OE and 2OE to VCCB through a pullup resistor (minimum value determined by driver sink capability); this ensures automatic isolation before logic initialization completes.