Texas Instruments SN74ABTH162245DLR

Overview

SN74ABTH162245DLR from Texas Instruments is a 16-bit noninverting bus transceiver with 3-state outputs, designed for synchronous bidirectional data transfer between A and B buses in high-speed digital systems. It supports dual 8-bit or single 16-bit operation, features integrated 25-Ω series resistors on A-port outputs to suppress overshoot/undershoot, operates from –40°C to 85°C, and delivers 12 mA sink/source capability on A ports and up to 64 mA on B ports - used in industrial backplane interfaces and memory-mapped I/O expansion.

For engineers reviewing the SN74ABTH162245DLR datasheet, SN74ABTH162245DLR pinout, SN74ABTH162245DLR application, or SN74ABTH162245DLR equivalent, key selection criteria include its 3-state bidirectional control logic (DIR/OE), bus-hold inputs eliminating external pull resistors, distributed VCC/GND pinning for noise reduction, and DL-package thermal resistance of 94°C/W.

Technical Context

The SN74ABTH162245DLR implements two independent 8-bit transceiver sections, each controlled by dedicated DIR and OE inputs, enabling simultaneous or isolated A↔B data flow. Its EPIC-II^B BiCMOS process reduces power dissipation while maintaining TTL-compatible voltage thresholds (VIH = 2 V, VIL = 0.8 V) and fast propagation delays (tPLH/tPHL ≤ 4.2 ns at 5 V).

It integrates active bus-hold circuitry on all data inputs to maintain valid logic states when floating, and features distributed power/ground pins plus flow-through pin architecture to minimize crosstalk and optimize PCB layout. Output ground bounce (VOLP) remains below 1 V at 5 V/25°C, supporting stable signal integrity in dense routing environments.

Key Specifications

Pinout & Package

SN74ABTH162245DLR uses a 48-pin Shrink Small-Outline Package (SSOP, DL), 0.5-mm pitch, 14.24 mm × 7.87 mm body size, with exposed pad not present and moisture sensitivity level (MSL) 1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC162245DGGR, SN74ABTH162245DLR provides native 5-V operation, bus-hold, and output damping - critical for legacy system upgrades; versus SN74ABT162245DL, it trades extended temperature rating for lower quiescent current, making it optimal for cost-sensitive commercial-grade applications.

Availability

SN74ABTH162245DLR is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory-mapped I/O expansion, programmable logic interfacing, and legacy bus bridging requiring stable component supply across long-lifecycle production programs.

Supply support for SN74ABTH162245DLR 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 and widebus technologies.

The SN74ABTH162245DLR belongs to TI's Widebus™ family of high-speed bus transceivers, engineered specifically for noise-resilient, low-glitch bidirectional data transfer in industrial control, instrumentation, and communications infrastructure.

FAQ

What is the maximum clock frequency supported by SN74ABTH162245DLR in a synchronous bus application?

The SN74ABTH162245DLR does not include an internal clock but supports synchronous bus operation up to approximately 200 MHz based on its worst-case propagation delay of 4.6 ns (B→A) and typical setup/hold timing margins. System-level frequency depends on trace length, load capacitance, and controller timing - verified in actual designs with CL = 50 pF and 5-V supply. SN74ABTH162245DLR performance remains stable within its specified –40°C to 85°C range.

Does SN74ABTH162245DLR require external pull-up resistors on DIR or OE inputs?

No - SN74ABTH162245DLR does not require external pull-up resistors on DIR or OE inputs because these are standard TTL-compatible control inputs with defined VIH (≥2 V) and VIL (≤0.8 V) thresholds. However, TI recommends tying OE to VCC through a pull-up resistor during power-up/down to guarantee high-impedance state; minimum value depends on driver sink capability, typically 4.7 kΩ to 10 kΩ.

Can SN74ABTH162245DLR be used in a 3.3-V system?

No - SN74ABTH162245DLR is specified only for 4.5 V to 5.5 V operation and is not 3.3-V compatible. Applying 3.3 V to VCC violates recommended operating conditions and results in undefined logic thresholds, reduced noise margin, and potential failure to meet timing or drive specifications. For 3.3-V systems, consider SN74LVC162245 instead.

How does the bus-hold feature of SN74ABTH162245DLR function during power-down sequences?

The bus-hold circuitry in SN74ABTH162245DLR remains active as long as VCC is ≥ 2 V and ceases operation below that threshold. During controlled power-down, it maintains valid logic states on floating data inputs until VCC drops below 2 V, preventing metastability in downstream logic. SN74ABTH162245DLR does not include power-down disable control for bus-hold - it operates automatically whenever powered within specification.

Is SN74ABTH162245DLR RoHS compliant and lead-free?

Yes - SN74ABTH162245DLR is RoHS compliant with lead-free terminal finish (NIPDAU) and meets JEDEC MSL Level-1 (260°C peak reflow). The DL package variant carries full exemption documentation and conforms to TI's General Quality Guidelines for industrial-grade products. Traceability data and material declarations are available upon request for SN74ABTH162245DLR.