Texas Instruments SN74ALVTH162245GR

Overview

SN74ALVTH162245GR from Texas Instruments is a 16-bit dual-octal noninverting bus transceiver with 3-state outputs, designed for 2.5-V/3.3-V V_CC operation and mixed-mode 5-V interface compatibility. It supports bidirectional data flow between A and B buses under DIR control, delivers ±12 mA (A port) and ±32/64 mA (B port) drive at 3.3 V, and integrates bus-hold circuitry to eliminate external pullup/pulldown resistors - used in high-speed backplane and memory subsystem interconnects.

For engineers reviewing the SN74ALVTH162245GR datasheet, SN74ALVTH162245GR pinout, SN74ALVTH162245GR application, or SN74ALVTH162245GR equivalent, key selection criteria include its hot-insertion support via I_off and power-up 3-state, 30-Ω integrated series termination on A-port outputs, flow-through pinout for PCB layout optimization, and guaranteed operation across –40°C to 85°C.

Technical Context

This device implements a dual-octal transceiver architecture with independent direction (DIR) and output-enable (OE) controls per 8-bit section, enabling flexible unidirectional or bidirectional bus bridging. Its Advanced BiCMOS Technology (ABT) delivers low static power dissipation while maintaining TTL-compatible input thresholds and 5-V-tolerant I/Os at 2.3–3.6-V V_CC.

The integrated bus-hold circuit sustains valid logic levels on floating inputs without external components, and the distributed V_CC/GND pin arrangement minimizes switching noise. Output ground bounce (V_OLP) remains below 0.8 V at 3.3 V, supporting clean signal integrity in dense digital systems.

Key Specifications

Pinout & Package

TSSOP-48 (DGG) package: 48-pin thin shrink small-outline package, 12.6 mm × 6.1 mm footprint, 1.2 mm max height, JEDEC MO-153 compliant, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC162245DGGR and SN74AVC162245GR, the SN74ALVTH162245GR uniquely combines 5-V I/O tolerance, integrated bus-hold, and hot-insertion safety - making it irreplaceable in mixed-voltage backplane and modular system designs where reliability under dynamic power conditions is critical.

Availability

SN74ALVTH162245GR is available at Aetrix Electronics and suitable for memory subsystem interconnects, processor-to-peripheral bridges, backplane data buses, and high-speed test equipment interfaces requiring stable component supply and long-term industrial availability.

Supply support for SN74ALVTH162245GR 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.

The SN74ALVTH162245GR belongs to TI's ALVTH advanced bus transceiver family, engineered specifically for robust mixed-voltage system integration, hot-swap capability, and signal integrity preservation in demanding backplane and modular electronics applications.

FAQ

What is the maximum operating temperature range for the SN74ALVTH162245GR?

The SN74ALVTH162245GR is specified for operation from –40°C to +85°C ambient temperature. This industrial-grade range ensures reliable performance in embedded computing, telecom equipment, and factory automation systems where thermal cycling and extended uptime are critical. The device maintains full electrical compliance-including drive strength, timing, and I_off behavior-across this entire range.

Does the SN74ALVTH162245GR support hot insertion, and how is it implemented?

Yes, the SN74ALVTH162245GR supports hot insertion through two complementary features: I_off circuitry disables outputs when V_CC = 0 V, preventing damaging current backflow, and power-up 3-state forces outputs into high-impedance mode whenever V_CC ≤ 1.2 V. These mechanisms are intrinsic to the silicon design and require no external circuitry - enabling safe insertion into live 3.3-V or 2.5-V backplanes.

Can the SN74ALVTH162245GR interface directly with 5-V logic without external level shifters?

Yes, the SN74ALVTH162245GR accepts and drives 5-V signals while operating from a 2.3–3.6-V V_CC. Its inputs tolerate up to 5.5 V, and its outputs deliver TTL-compatible VOH/VOL levels into 5-V loads. This mixed-mode capability is built into the ABT process and verified across temperature and voltage corners - eliminating the need for discrete level translators in processor-to-legacy-peripheral links.

What is the purpose of the 30-Ω series resistance on the A-port outputs of the SN74ALVTH162245GR?

The 30-Ω series resistance on each A-port output is an on-die termination that dampens signal reflections on PCB traces, reducing overshoot and undershoot without requiring external resistors. It is optimized for typical FR-4 trace impedances (50–75 Ω) and operates transparently - no configuration or enablement is needed. This feature directly improves signal integrity in point-to-point or short-stub topologies common in memory and control bus applications.

How does the bus-hold circuitry in the SN74ALVTH162245GR function, and when should it be used?

The bus-hold circuitry in the SN74ALVTH162245GR actively maintains the last-valid logic state on unused or floating data inputs using weak feedback transistors (±75 µA hold current at 3 V). It replaces external pullup/pulldown resistors, reducing component count and board area. Use it on all unconnected A/B data lines - but do not combine with external biasing, as that may cause contention or excessive current draw.