Texas Instruments SN74LVCC3245ADBRG4

Overview

SN74LVCC3245ADBRG4 from Texas Instruments is an octal noninverting bus transceiver with dual-supply voltage translation (2.3V–3.6V on A port, 3V–5.5V on B port), 3-state outputs, and VCC isolation. It enables bidirectional level shifting between 2.5V/3.3V and 5V domains in real-time data buses, supporting up to 24mA drive strength at 3V and operating across –40°C to +85°C.

For engineers reviewing the SN74LVCC3245ADBRG4 datasheet, SN74LVCC3245ADBRG4 pinout, SN74LVCC3245ADBRG4 application, or SN74LVCC3245ADBRG4 equivalent, this device is selected for robust power sequencing, Ioff partial-power-down protection, and glitch-free supply ramping in mixed-voltage industrial control and medical imaging systems.

Technical Context

The SN74LVCC3245ADBRG4 implements asynchronous bidirectional data flow controlled by DIR and OE inputs referenced to VCCA. Its dual-rail architecture isolates A- and B-side logic domains while maintaining signal integrity during voltage transitions.

VCC isolation ensures high-impedance output states when either VCCA or VCCB drops below 100mV or floats; Ioff circuitry prevents backflow current during partial power-down. Control inputs (DIR, OE) are VCCA-referenced, enabling consistent logic thresholds regardless of VCCB level.

Key Specifications

Pinout & Package

SN74LVCC3245ADBRG4 is packaged in a 24-pin SSOP (DB) with dimensions 8.2mm × 7.8mm and 0.65mm lead pitch. The package supports surface-mount assembly and provides thermal resistance RθJA = 90.7°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVCC3245ADBRG4, SN74AVC8T245RHLR offers smaller package but sacrifices 5V compatibility and supply isolation, while TXB0108PWR simplifies control logic at the cost of drive strength and robustness in mixed-voltage power architectures.

Availability

SN74LVCC3245ADBRG4 is available at Aetrix Electronics and suitable for ultrasound scanner interfaces, string inverter control buses, and single-board computer expansion requiring stable component supply across industrial temperature ranges and dual-voltage domain bridging.

Supply support for SN74LVCC3245ADBRG4 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 and embedded processing solutions, with over 90 years of innovation in precision analog, power management, and interface technologies.

The SN74LVCC3245ADBRG4 belongs to TI's LVCC logic family, designed specifically for robust voltage translation in industrial, medical, and renewable energy systems where supply sequencing reliability and mixed-voltage interoperability are critical.

FAQ

What voltage ranges does the SN74LVCC3245ADBRG4 support on its A and B ports?

The SN74LVCC3245ADBRG4 supports 2.3V to 3.6V on the A port (VCCA) and 3V to 5.5V on the B port (VCCB). This enables bidirectional translation between common logic families such as 2.5V/3.3V microcontrollers and 5V peripherals. Both supplies operate independently, and the device remains functional across the full specified range without external biasing components.

How does the VCC isolation feature work in the SN74LVCC3245ADBRG4?

The SN74LVCC3245ADBRG4 enters high-impedance state on both A and B ports when either VCCA or VCCB falls below 100mV or is left floating. This prevents bus contention and backdrive current during power-up, power-down, or fault conditions. The behavior is hardware-enforced and requires no external control - it is intrinsic to the SN74LVCC3245ADBRG4's internal isolation circuitry.

Is the SN74LVCC3245ADBRG4 compatible with hot-swap or partial-power-down systems?

Yes. The SN74LVCC3245ADBRG4 includes Ioff circuitry that limits power-off leakage to ±0.5μA maximum, preventing damaging current flow when one supply is active and the other is off. This makes the SN74LVCC3245ADBRG4 suitable for modular power architectures, hot-plug cards, and systems requiring graceful degradation during supply faults.

What is the maximum output drive capability of the SN74LVCC3245ADBRG4?

The SN74LVCC3245ADBRG4 delivers up to 24mA sink/source per I/O at 3V VCCA, verified under recommended operating conditions. This drive strength supports direct interfacing with heavier loads such as multiple LVTTL inputs, longer PCB traces, or optocoupler LEDs - eliminating the need for external buffer stages in many industrial and medical applications using the SN74LVCC3245ADBRG4.

Does the SN74LVCC3245ADBRG4 require specific power sequencing during startup?

No. The SN74LVCC3245ADBRG4 features glitch-free power supply sequencing: VCCA and VCCB may be powered in any order or at different rates without causing false output transitions. This eliminates sequencing constraints in complex power architectures and ensures reliable operation in systems where supplies ramp asynchronously - a core design attribute of the SN74LVCC3245ADBRG4.