Texas Instruments SN74LVTH16245AGRDR

Overview

SN74LVTH16245AGRDR 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 mixed-mode systems. It features bus-hold circuitry, Ioff support for hot insertion, distributed VCC/GND pins, and operates down to 2.7 V supply. Used in high-speed backplane interfaces and FPGA-to-ASIC interconnects.

For engineers reviewing the SN74LVTH16245AGRDR datasheet, SN74LVTH16245AGRDR pinout, SN74LVTH16245AGRDR application, or SN74LVTH16245AGRDR equivalent, key selection criteria include 3.3-V VCC compatibility with 5-V tolerant I/O, 48-pin TSSOP (DGG) package footprint, bus-hold functionality eliminating external resistors, and guaranteed hot-insertion behavior via Ioff and power-up 3-state logic.

Technical Context

This device implements two independent 8-bit transceiver sections (A↔B), each controlled by dedicated DIR (direction) and OE (output enable) inputs. Its Advanced BiCMOS Technology (ABT) enables low static power dissipation while maintaining TTL-compatible output drive strength at 3.3-V VCC.

The logic architecture supports three operational states per section: A→B transmission (DIR=H, OE=L), B→A transmission (DIR=L, OE=L), or full isolation (OE=H). Input circuits remain active regardless of OE state, requiring defined logic levels on all data pins to avoid excess ICCZ current.

Key Specifications

Pinout & Package

SN74LVTH16245AGRDR is packaged in a 48-pin TSSOP (DGG) with 0.5-mm pitch, 12.4 mm × 6.1 mm body, and 1.2 mm max height. Pin 1 is located at top-left corner with notch marking orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16245ADGGR and SN74AVC16245DGGR, SN74LVTH16245AGRDR uniquely combines 5-V I/O tolerance, integrated bus-hold, and proven hot-insertion capability - making it the only choice for mixed-voltage backplane designs requiring zero external bias components and live-replaceable modules.

Availability

SN74LVTH16245AGRDR is available at Aetrix Electronics and suitable for high-speed backplane interfaces, FPGA-to-ASIC bridges, industrial PLC I/O expansion, and automated test equipment signal routing requiring stable component supply and long-term production continuity.

Supply support for SN74LVTH16245AGRDR 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 logic solutions, with decades of expertise in high-reliability interface ICs for industrial and communications infrastructure.

SN74LVTH16245AGRDR belongs to TI's Widebus™ family of advanced bus interface devices, engineered specifically for robust mixed-voltage system integration in telecom, computing, and automation applications demanding hot-swap readiness and noise resilience.

FAQ

What is the maximum operating temperature range for SN74LVTH16245AGRDR?

SN74LVTH16245AGRDR is rated for operation from –40°C to +85°C ambient temperature. This industrial-grade range ensures reliable performance in base station radios, programmable logic controllers, and network switches deployed in uncontrolled environments. The device's thermal impedance (θJA = 70°C/W in DGG package) supports adequate heat dissipation under typical 16-bit bus loading conditions without forced airflow.

Does SN74LVTH16245AGRDR support true 5-V input and output signaling?

Yes, SN74LVTH16245AGRDR supports 5-V input voltage (VI up to 5.5 V) and can drive 5-V TTL loads with its 64-mA sink capability at VCC = 3 V. However, its outputs are not 5-V powered - they swing between GND and VCC (3.3 V), so it does not provide 5-V output voltage levels. It functions as a level translator from 5-V inputs to 3.3-V outputs and vice versa via direction control.

How does the bus-hold feature work on SN74LVTH16245AGRDR?

SN74LVTH16245AGRDR integrates active bus-hold circuitry on all A-port and B-port inputs, which applies ±75 µA dynamic current to maintain the last-valid logic state when inputs float. This eliminates external pullup/pulldown resistors and prevents undefined states during power-up, reset, or disconnected operation - critical for system stability in modular hardware architectures.

Can SN74LVTH16245AGRDR be used in hot-swap applications?

Yes, SN74LVTH16245AGRDR is explicitly designed for hot insertion. Its Ioff circuitry disables outputs when VCC = 0 V, blocking backflow current, and its power-up 3-state logic forces outputs into high-impedance mode until VCC exceeds 1.5 V. These features meet JEDEC-compliant hot-swap requirements and are validated in TI's application reports for telecom line-card designs.

What package type is SN74LVTH16245AGRDR supplied in?

SN74LVTH16245AGRDR is supplied in a 48-pin TSSOP (Thin Shrink Small Outline Package) with designation DGG, measuring 12.4 mm × 6.1 mm × 1.2 mm max height and 0.5-mm lead pitch. This RoHS-compliant, NIPDAU-finished package has Moisture Sensitivity Level 1 (MSL-1) and is optimized for automated SMT assembly in high-density PCB layouts.