Texas Instruments SN74LVCH16245ADGGR

Overview

SN74LVCH16245ADGGR from Texas Instruments is a 16-bit dual-octal noninverting bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between 1.65–3.6 V buses. It supports mixed-mode signaling (5.5 V-tolerant inputs at 3.3 V VCC), delivers 4 ns max propagation delay at 3.3 V, and features bus-hold circuitry eliminating external pull resistors. It is used in tablet memory expansion interfaces requiring level translation and bus isolation.

For engineers reviewing the SN74LVCH16245ADGGR datasheet, SN74LVCH16245ADGGR pinout, SN74LVCH16245ADGGR application, or SN74LVCH16245ADGGR equivalent, key selection criteria include 3.3 V operation with 5.5 V input tolerance, dual-directional 8-bit channel control via DIR/OE pins, Ioff support for live insertion, and TSSOP-48 package compatibility with high-density PCB layouts.

Technical Context

The SN74LVCH16245ADGGR implements two independent 8-bit transceiver sections, each with dedicated direction (DIR) and output-enable (OE) controls. Its CMOS design enables true bidirectional data flow: when 1DIR = LOW and 1OE = LOW, data passes from B-port to A-port; when 1DIR = HIGH and 1OE = LOW, data flows A-to-B. Both ports retain active input receivers regardless of OE state.

Bus-hold circuitry maintains undriven A/B port inputs at valid logic levels without external biasing, while Ioff protection disables outputs and blocks current backflow during partial power-down. The device meets JESD 22 ESD standards (2000-V HBM) and supports 125°C max operating temperature under full 3.3 V supply conditions.

Key Specifications

Pinout & Package

TSSOP-48 package (DGG), body size 12.50 mm × 6.10 mm, 0.5 mm pitch, lead-free NiPdAu finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16245ADGGR and 74ALVC16245PW, the SN74LVCH16245ADGGR uniquely combines 5.5 V input tolerance, bus-hold, and Ioff in a single 3.3 V-compatible device-making it the only option for robust mixed-voltage hot-swap interfaces in portable electronics.

Availability

SN74LVCH16245ADGGR is available at Aetrix Electronics and suitable for electronic points of sale, test and measurement equipment, and wearable health devices requiring stable component supply across long production lifecycles.

Supply support for SN74LVCH16245ADGGR 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 over 50 years of innovation in high-reliability interface ICs.

The SN74LVCH16245ADGGR belongs to TI's Widebus™ family of advanced bus interface devices, engineered specifically for voltage-domain bridging and noise-resilient data transfer in portable and industrial systems.

FAQ

What is the maximum operating voltage for SN74LVCH16245ADGGR inputs?

The SN74LVCH16245ADGGR supports input voltages up to 5.5 V regardless of VCC setting within the 1.65–3.6 V range. This allows direct connection to 5 V logic sources without external level-shifting components, making the SN74LVCH16245ADGGR ideal for mixed-voltage system integration where legacy peripherals coexist with modern low-voltage controllers.

Does SN74LVCH16245ADGGR require external pullup or pulldown resistors on its data lines?

No, the SN74LVCH16245ADGGR integrates active bus-hold circuitry on all 16 data I/Os, which maintains undriven inputs at valid logic states. This eliminates the need for external pullup or pulldown resistors, reducing BOM cost and PCB real estate-especially valuable in compact wearable and tablet designs where the SN74LVCH16245ADGGR is commonly deployed.

Can SN74LVCH16245ADGGR be used during hot-swap or partial-power-down scenarios?

Yes, the SN74LVCH16245ADGGR includes Ioff circuitry that disables outputs and blocks current backflow when VCC = 0 V. This feature enables safe live insertion into powered backplanes and supports partial-power-down modes in modular systems-critical functionality confirmed in the SN74LVCH16245ADGGR datasheet Section 9.3 and validated in industrial POS and test equipment applications.

What is the propagation delay performance of SN74LVCH16245ADGGR at 3.3 V?

The SN74LVCH16245ADGGR achieves a maximum propagation delay (tpd) of 4 ns at VCC = 3.3 V and TA = 25°C, as specified in Table 7.6 of the official datasheet. This timing performance supports reliable data transfer at bus frequencies exceeding 200 MHz in well-terminated, low-capacitance layouts-making the SN74LVCH16245ADGGR suitable for high-speed tablet memory expansion and FPGA-to-peripheral interfaces.

Which package type does SN74LVCH16245ADGGR use, and what are its key mechanical attributes?

The SN74LVCH16245ADGGR uses a TSSOP-48 (DGG) package measuring 12.50 mm × 6.10 mm with 0.5 mm lead pitch. It features NiPdAu lead finish, RoHS compliance, and MSL Level-1 rating (unlimited floor life at ≤30°C/60% RH). These attributes ensure compatibility with standard SMT assembly processes and high-density PCB routing-key advantages for space-constrained consumer electronics where the SN74LVCH16245ADGGR is frequently applied.