Texas Instruments SN74ALVTH16245VR

Overview

SN74ALVTH16245VR from Texas Instruments is a 16-bit noninverting 3-state transceiver in TVSOP-48 package, supporting mixed-mode 2.5-V/3.3-V V_CC operation with 5-V tolerant I/O, ±64 mA drive strength at 3.3 V, bus-hold circuitry, and hot-insertion capability via I_off and power-up 3-state logic. It enables bidirectional data flow between A and B buses in industrial backplane and memory interface applications.

For engineers reviewing the SN74ALVTH16245VR datasheet, SN74ALVTH16245VR pinout, SN74ALVTH16245VR application, or SN74ALVTH16245VR equivalent, key selection considerations include its 3.3-V supply compatibility, 5-V input tolerance, bus-hold functionality eliminating external resistors, high-speed propagation delay (≤3.1 ns), and TVSOP-48 thermal performance (θ_JA = 58°C/W).

Technical Context

This device implements dual-octal transceiver architecture with independent DIR and OE controls per 8-bit section, enabling flexible unidirectional or bidirectional bus communication. Its Advanced BiCMOS Technology (ABT) delivers low static power dissipation while maintaining TTL-compatible thresholds and robust noise immunity across 2.3–3.6 V V_CC.

The integrated bus-hold circuit sustains valid logic levels on floating inputs without pullup/pulldown resistors, and the I_off protection prevents current backflow during power-down. Power-up 3-state ensures outputs remain high-impedance until V_CC exceeds 1.2 V, avoiding bus contention during sequencing.

Key Specifications

Pinout & Package

SN74ALVTH16245VR uses a 48-pin TVSOP (DGV) package with 0.4 mm pitch, 7.7 mm × 4.4 mm body, and exposed thermal pad. Pin assignments follow JEDEC MO-153 standard with distributed V_CC/GND pins to minimize switching noise.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16245ADGGR and SN74AVC16245DGGR, the SN74ALVTH16245VR uniquely combines 5-V I/O tolerance, ±64 mA drive, and bus-hold in a single 3.3-V optimized device - making it the only choice for mixed-voltage industrial backplanes requiring hot-swap reliability.

Availability

SN74ALVTH16245VR is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory subsystem buffering, modular I/O expansion, and test equipment signal routing requiring stable component supply and long-term obsolescence management.

Supply support for SN74ALVTH16245VR 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 components.

The SN74ALVTH16245VR belongs to TI's Widebus™ ABT transceiver family, engineered specifically for robust mixed-voltage bus interfacing in industrial automation, telecom infrastructure, and test instrumentation where signal integrity and hot-swap safety are critical.

FAQ

What voltage levels can SN74ALVTH16245VR tolerate on its I/O pins?

The SN74ALVTH16245VR accepts input voltages from 0 V to 5.5 V and drives outputs compatible with 5-V logic, even when powered from 2.3–3.6 V V_CC. This 5-V tolerance enables direct interfacing with legacy systems without external level-shifting circuitry, as confirmed in the absolute maximum ratings and recommended operating conditions tables of the SCES066G datasheet.

Does SN74ALVTH16245VR support hot insertion, and how is it implemented?

Yes, SN74ALVTH16245VR supports hot insertion via two complementary features: I_off circuitry disables outputs and limits leakage to ±100 µA when V_CC = 0 V, preventing backflow current; and power-up 3-state holds outputs in high-impedance until V_CC exceeds 1.2 V, avoiding bus contention during power ramp. Both mechanisms are fully specified in the datasheet's functional description and absolute maximum ratings.

How does the bus-hold feature of SN74ALVTH16245VR eliminate external resistors?

The SN74ALVTH16245VR integrates active bus-hold circuitry that sources or sinks ≥75 µA at VIH min/VIL max (V_CC = 3 V) to maintain valid logic states on floating inputs. This eliminates the need for external pullup or pulldown resistors, reducing BOM cost and PCB area - a capability explicitly documented in the electrical characteristics tables and functional description of the SCES066G datasheet.

What is the maximum data rate supported by SN74ALVTH16245VR in practical designs?

While SN74ALVTH16245VR has a propagation delay of ≤3.1 ns (V_CC = 3.3 V, CL = 50 pF), its usable data rate depends on system-level timing margins. With typical setup/hold requirements and board trace lengths, it reliably supports bidirectional bus operation up to 100 MHz in industrial backplane applications - validated by its specified t_PLH/t_PHL and skew parameters in the switching characteristics section.

Is SN74ALVTH16245VR pin-compatible with other 16-bit transceivers in TVSOP-48 packages?

SN74ALVTH16245VR shares the same TVSOP-48 (DGV) mechanical footprint and pin count with SN74LVC16245ADGGR and SN74AVC16245DGGR, but pin functions differ due to distinct DIR/OE arrangements and internal architecture. Direct replacement requires verification of signal mapping and timing - the datasheet confirms identical pin numbering for DGG/DGV/DL packages but does not claim functional or pin-to-pin compatibility across families.