Texas Instruments SN74ALVTH162245VR

Overview

SN74ALVTH162245VR 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 (A↔B), features integrated bus-hold circuitry, I_off for hot insertion, and A-port outputs with built-in 30-Ω series termination. Used in high-speed backplane and memory interface applications requiring level translation and bus isolation.

For engineers reviewing the SN74ALVTH162245VR datasheet, SN74ALVTH162245VR pinout, SN74ALVTH162245VR application, or SN74ALVTH162245VR equivalent, key selection criteria include its 3.3-V B-port drive (–32/64 mA), 2.5-V/3.3-V supply range, TVSOP-48 package footprint, and guaranteed hot-insertion support via power-up 3-state and I_off.

Technical Context

The SN74ALVTH162245VR implements a flow-through architecture with distributed V_CC/GND pins to minimize switching noise, and uses Advanced BiCMOS Technology (ABT) for low static power dissipation. Its DIR and OE control logic enables independent direction and output enable per 8-bit section, supporting both 16-bit and dual-8-bit configurations.

Bus-hold circuitry eliminates need for external pullup/pulldown resistors on data inputs, while A-port outputs integrate 30-Ω series resistors to suppress overshoot/undershoot. The device enters high-impedance state when V_CC ≤ 1.2 V or OE is high, and supports TTL-level inputs even at 5 V with V_CC as low as 2.3 V.

Key Specifications

Pinout & Package

SN74ALVTH162245VR is housed in a 48-pin TVSOP (DGV) package, 3.6 mm × 12.5 mm body, 1.2 mm max height, 0.4 mm pitch, JEDEC MO-153 compliant. Pin 1 marked by beveled corner; pin numbering follows standard counter-clockwise top-view convention.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16245ADGGR and SN74AVC162245GR, the SN74ALVTH162245VR uniquely combines 5-V tolerance, bus-hold, I_off, and A-port series termination - making it the only option among the three qualified for mixed-voltage hot-swap backplane use without supplemental components.

Availability

SN74ALVTH162245VR is available at Aetrix Electronics and suitable for memory interface, backplane interconnect, processor bus expansion, and FPGA I/O bridging applications requiring stable component supply, long-term lifecycle support, and verified mixed-voltage interoperability.

Supply support for SN74ALVTH162245VR 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 over 90 years of innovation in high-reliability IC design and manufacturing.

The ALVTH family targets high-speed, mixed-voltage board-level interconnects - specifically engineered for hot-pluggable systems, legacy interface bridging, and noise-sensitive applications demanding robust I/O protection and deterministic timing.

FAQ

What voltage levels can SN74ALVTH162245VR safely interface between?

SN74ALVTH162245VR supports 2.3–3.6-V V_CC operation while accepting 0–5.5-V input signals and driving 5-V-tolerant loads. This allows direct connection between 2.5-V/3.3-V controllers and 5-V TTL peripherals without external level shifters - a core capability confirmed in the recommended operating conditions table for V_I and V_O limits.

Does SN74ALVTH162245VR require external pullup or pulldown resistors on data lines?

No. SN74ALVTH162245VR integrates active bus-hold circuitry on all data inputs, which maintains unused or floating lines at valid logic levels. The datasheet explicitly states that using external pull resistors with bus-hold is not recommended, as it may interfere with the internal sustaining current (±75 µA at 3 V).

How does SN74ALVTH162245VR support hot insertion in live backplane systems?

SN74ALVTH162245VR supports hot insertion via two complementary features: I_off circuitry disables outputs when V_CC = 0, preventing backflow current, and power-up 3-state forces outputs into high-impedance below 1.2 V V_CC. Both mechanisms are tested per JESD 78 Class II latch-up standards and documented in the absolute maximum ratings and functional description sections.

What is the purpose of the 30-Ω series resistors on the A-port outputs of SN74ALVTH162245VR?

The 30-Ω series resistors on SN74ALVTH162245VR A-port outputs are integrated termination elements that dampen signal reflections on PCB traces, reducing overshoot and undershoot without requiring discrete components. This feature is explicitly cited in the "Features" section and validated by the specified A-port drive strength (–12/12 mA) and low-noise layout guidance.

Can SN74ALVTH162245VR be used as two independent 8-bit transceivers?

Yes. SN74ALVTH162245VR contains two independent 8-bit sections (1A/1B and 2A/2B), each with dedicated DIR and OE controls. The function table and logic diagram confirm separate operation: 1DIR/1OE govern the first octal channel, while 2DIR/2OE control the second - enabling flexible partitioning for dual-bus or split-data-path architectures.