Texas Instruments SN74ABTH16245DGVR

Overview

SN74ABTH16245DGVR from Texas Instruments is a 16-bit noninverting bus transceiver with 3-state outputs, designed for synchronous two-way data bus communication between A and B buses. It operates from –40°C to 85°C at 4.5–5.5 V, delivers ±32-mA high-drive outputs, features bus-hold on all data inputs, and maintains high-impedance during power-up/down. It is used in industrial backplane interfaces requiring robust noise immunity and isolation.

For engineers reviewing the SN74ABTH16245DGVR datasheet, SN74ABTH16245DGVR pinout, SN74ABTH16245DGVR application, or SN74ABTH16245DGVR equivalent, key selection considerations include its 48-pin TVSOP (DGV) package, bidirectional direction control (DIR), output-enable (OE) logic, bus-hold functionality, and guaranteed 3.4 ns typical propagation delay (tPLH/tPHL) at 5 V.

Technical Context

The SN74ABTH16245DGVR implements dual 8-bit or single 16-bit flow-through architecture with separate DIR and OE controls per section, enabling flexible bus arbitration. Its EPIC-II^B BiCMOS process reduces switching noise while supporting high-speed operation up to 10 ns/V input transition rate.

It integrates distributed V_CC/GND pins and active bus-hold circuitry-eliminating external pull resistors-and ensures isolation when OE is high or V_CC is below 2.1 V. Latch-up performance exceeds 500 mA per JESD 17.

Key Specifications

Pinout & Package

SN74ABTH16245DGVR is housed in a 48-pin Thin Very Small-Outline Package (TVSOP, DGV), 3.6 mm × 11.5 mm body, 0.4 mm pitch, 1.2 mm max height, JEDEC MO-153 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16245ADGGR and SN74ABT16245DGGR, the SN74ABTH16245DGVR uniquely combines 5-V compatibility, high drive, and integrated bus-hold-making it the only choice for robust, component-count-optimized industrial bus isolation without external support circuitry.

Availability

SN74ABTH16245DGVR is available at Aetrix Electronics and suitable for industrial backplane interfaces, modular PLC I/O carriers, automated test equipment bus arbiters, and legacy system bus extenders requiring stable component supply and long-term production continuity.

Supply support for SN74ABTH16245DGVR 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 heritage in high-reliability interface ICs.

The SN74ABTH16245DGVR belongs to TI's Widebus™ family of high-speed bus transceivers, engineered specifically for noise-immune, high-drive 5-V parallel bus applications in industrial automation and test instrumentation.

FAQ

What is the maximum operating temperature range for the SN74ABTH16245DGVR?

The SN74ABTH16245DGVR is characterized for operation from –40°C to +85°C. This industrial temperature range ensures reliable performance in factory-floor control cabinets, outdoor enclosures, and other environments where ambient temperatures exceed commercial limits. The device maintains full electrical specifications-including propagation delay, drive strength, and bus-hold behavior-across this entire range.

Does the SN74ABTH16245DGVR require external pull-up or pull-down resistors on its data inputs?

No. The SN74ABTH16245DGVR includes active bus-hold circuitry on all A and B port data inputs, which maintains unused or floating inputs at valid logic levels without external components. This feature eliminates the need for pull-up or pull-down resistors, reducing BOM cost and PCB area-particularly valuable in modular systems with configurable I/O slots where some data lines may remain unconnected.

What package type is used for the SN74ABTH16245DGVR, and how does it differ from the DGG variant?

The SN74ABTH16245DGVR uses the TVSOP (DGV) package: 48-pin, 0.4 mm pitch, 3.6 mm × 11.5 mm body, 1.2 mm max height. Compared to the TSSOP (DGG) variant, the DGV package is narrower (16.4 mm vs. 24.4 mm tape width) and has slightly smaller cavity dimensions (A0 = 7.1 mm, B0 = 10.2 mm), enabling denser board layouts. Both share the same pinout and thermal rating (θ_JA = 93°C/W for DGV vs. 89°C/W for DGG).

Can the SN74ABTH16245DGVR be used in a 3.3-V system?

No. The SN74ABTH16245DGVR is specified only for 4.5 V to 5.5 V operation and is not 3.3-V compatible. Its input thresholds, output drive, and internal biasing are optimized for 5-V TTL logic families. For 3.3-V applications, consider the SN74LVC16245ADGGR-but note it lacks bus-hold and requires level translation when interfacing with 5-V subsystems.

How does the SN74ABTH16245DGVR handle power-up and power-down sequencing?

When V_CC is between 0 V and 2.1 V, the SN74ABTH16245DGVR automatically enters a high-impedance state on all outputs-preventing bus contention during power ramp-up or brownout. To ensure full isolation above 2.1 V, OE must be held high (via pullup resistor to V_CC). This behavior makes the SN74ABTH16245DGVR inherently safe for hot-swap and multi-rail power architectures without additional sequencing logic.