Texas Instruments SN74LVT16245BDLR

Overview

SN74LVT16245BDLR from Texas Instruments is a 3.3-V ABT 16-bit dual-octal noninverting bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between 3.3-V and 5-V systems. It features 48-pin SSOP packaging, ±64 mA low-level output drive at VCC = 3.3 V, and supports hot insertion via Ioff and power-up 3-state logic. Used in mixed-voltage backplane interfaces and FPGA-to-ASIC interconnects.

For engineers reviewing the SN74LVT16245BDLR datasheet, SN74LVT16245BDLR pinout, SN74LVT16245BDLR application, or SN74LVT16245BDLR equivalent, key selection considerations include its 3.3-V supply operation with 5-V tolerant I/Os, DIR/OE-controlled directionality, flow-through pinout for PCB layout optimization, and guaranteed performance across –40°C to 85°C.

Technical Context

The SN74LVT16245BDLR implements two independent 8-bit transceiver sections (A↔B), each controlled by dedicated DIR and OE inputs. Its Advanced BiCMOS Technology (ABT) enables TTL-compatible switching with low static power dissipation and robust ground bounce suppression (VOLP < 0.8 V).

It supports mixed-mode signal operation: inputs accept 0–5.5 V regardless of VCC (2.7–3.6 V), and outputs drive 5-V buses while powered from 3.3 V. Distributed VCC/GND pins and flow-through architecture minimize high-speed switching noise and simplify routing.

Key Specifications

Pinout & Package

SN74LVT16245BDLR uses a 48-pin SSOP (DL) package measuring 12.6 mm × 6.1 mm × 1.75 mm (max height), JEDEC MO-153 compliant, with gull-wing leads and 0.5-mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVT16245BDLR, SN74LVC16245ADGGR trades 5-V tolerance and drive strength for lower static power and broader VCC range, while 74ALVC16245PW matches pinout but omits critical hot-swap protections-making SN74LVT16245BDLR uniquely suited for mixed-voltage, field-replaceable designs.

Availability

SN74LVT16245BDLR is available at Aetrix Electronics and suitable for industrial backplane interfaces, FPGA-to-ASIC bridges, memory subsystem isolation, and hot-swappable module interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LVT16245BDLR 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 logic and interface solutions.

The SN74LVT16245BDLR belongs to TI's Widebus™ family of advanced bus interface devices, engineered specifically for robust, low-noise, mixed-voltage communication in industrial, telecom, and computing infrastructure.

FAQ

What is the maximum operating temperature range for the SN74LVT16245BDLR?

The SN74LVT16245BDLR is specified for operation from –40°C to +85°C ambient temperature. This industrial-grade range is validated across all electrical parameters in the datasheet, including propagation delay, drive strength, and Ioff behavior. The device maintains full functionality within this range without derating, making it suitable for deployment in enclosed industrial enclosures or outdoor telecom cabinets.

Does the SN74LVT16245BDLR support true 5-V input and output signaling?

The SN74LVT16245BDLR accepts 0–5.5 V input voltages regardless of VCC (2.7–3.6 V), enabling direct connection to 5-V TTL sources. However, its outputs swing only from GND to VCC (max 3.6 V), so it does not actively drive 5-V logic levels - it interfaces *to* 5-V systems as a receiver, not as a 5-V driver. The SN74LVT16245BDLR relies on external pull-ups or bus termination for 5-V-compatible signaling on the B-port.

How does the SN74LVT16245BDLR handle power sequencing during system startup?

The SN74LVT16245BDLR incorporates power-up 3-state logic: when VCC is below 1.5 V, all outputs remain in high-impedance state regardless of DIR/OE states. This prevents bus contention during power ramp-up. To ensure continued high-Z above 1.5 V, OE must be tied to VCC via a pullup resistor - minimum value determined by the driver's sink capability, typically ≤10 kΩ for standard CMOS drivers.

Can the SN74LVT16245BDLR replace the older SN74LVT16244BDLR in an existing design?

No - the SN74LVT16245BDLR is a transceiver (bidirectional), while the SN74LVT16244BDLR is a unidirectional buffer. They differ in pin function (DIR vs. CLK), internal logic, and signal flow directionality. Swapping them would require PCB redesign and firmware updates to manage direction control. The SN74LVT16245BDLR is not a drop-in replacement for SN74LVT16244BDLR.

What package variant does SN74LVT16245BDLR use, and is it RoHS-compliant?

SN74LVT16245BDLR uses the SSOP-48 (DL) package: 12.6 mm × 6.1 mm body, 0.5-mm lead pitch, gull-wing leads, and 1.75-mm maximum height. It is RoHS-compliant (lead-free NiPdAu finish), moisture sensitivity level 1 (MSL-1), and rated for peak reflow at 260°C. Tape-and-reel packaging contains 1000 units per reel with Q1 pin-1 orientation.