Texas Instruments SN74ABT16541ADGGR

Overview

SN74ABT16541ADGGR from Texas Instruments is a noninverting 16-bit buffer/driver with dual 3-state output-enable control per 8-bit section, operating at 4.5–5.5 V, delivering –32-mA high-level and 64-mA low-level output drive, and specified for –40°C to 85°C industrial temperature range in a 48-pin TSSOP (DGG) package - used in high-speed bus interface and memory address/data buffering.

For engineers reviewing the SN74ABT16541ADGGR datasheet, SN74ABT16541ADGGR pinout, SN74ABT16541ADGGR application, or SN74ABT16541ADGGR equivalent, key selection criteria include its dual independent OE control architecture, flow-through pinout for PCB layout optimization, distributed V_CC/GND configuration for noise suppression, and guaranteed 3.4-ns max t_PHL at 5 V with 50-pF load.

Technical Context

This device implements two independent 8-bit noninverting buffer sections, each requiring both OE1 and OE2 inputs low to enable outputs; either OE high forces that section's Y outputs into high-impedance state. It uses EPIC-II^B BiCMOS process for low power dissipation and high noise immunity.

The architecture features distributed V_CC and GND pins across the 48-pin TSSOP package to minimize simultaneous switching noise, and a flow-through pin arrangement (inputs on one side, outputs on the opposite) to simplify trace routing and reduce crosstalk in dense bus applications.

Key Specifications

Pinout & Package

SN74ABT16541ADGGR is housed in a 48-pin Thin Shrink Small-Outline Package (TSSOP, DGG), 12.6 mm × 6.2 mm × 1.2 mm max height, with 0.5-mm pitch, RoHS-compliant NiPdAu lead finish, and moisture sensitivity level 1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit noninverting buffer applications.

Compared with SN74ABT16541ADGGR, SN74ABT162244ADGGR offers identical performance in an inverting configuration - ideal for complementing existing noninverting stages - while SN74LVC16244ADGGR trades 5-V compatibility and drive for reduced voltage operation and lower static power, making it appropriate only in fully 3.3-V ecosystems.

Availability

SN74ABT16541ADGGR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy ISA bus interface, and memory address buffering requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for SN74ABT16541ADGGR 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 industrial, automotive, and communications markets.

The SN74ABT16541ADGGR belongs to TI's Widebus™ family of high-speed bus interface ICs, designed specifically for noise-immune, high-drive 5-V TTL-compatible data and address path buffering in demanding industrial and computing infrastructure.

FAQ

What is the recommended power-up sequence for SN74ABT16541ADGGR to avoid bus contention?

To prevent undefined output states during power-up, tie all OE inputs (1OE1, 1OE2, 2OE1, 2OE2) to V_CC via a pullup resistor - minimum value determined by the driver's current-sinking capability. This ensures all outputs remain in high-impedance until firmware asserts valid OE control. The SN74ABT16541ADGGR does not include internal power-on reset circuitry, so external OE management is mandatory for glitch-free initialization.

Can SN74ABT16541ADGGR drive a 100-pF load while maintaining timing specifications?

No - the published switching characteristics (e.g., 3.4-ns max t_PHL) are measured with C_L = 50 pF. At 100-pF load, propagation delay increases approximately linearly with capacitance; expect ~6–7 ns delay and potential waveform degradation. For >75-pF loads, consider reducing trace length, adding series termination, or selecting a higher-drive alternative such as SN74ABT16541ADGGR's sibling SN74ABT16540 with enhanced drive.

Does SN74ABT16541ADGGR support hot-swap operation on a live 5-V bus?

Yes - the SN74ABT16541ADGGR features bus-hold circuitry-free inputs and high latch-up immunity (>500 mA per JESD17), enabling safe insertion into powered-backplane systems. However, OE must be held high (disabled) during insertion, then sequenced low after power stabilization. The device's 5.5-V absolute maximum V_CC rating and –0.5-V to 7-V input tolerance provide margin against supply transients during hot-swap events.

What is the thermal derating limit for continuous 64-mA output current on SN74ABT16541ADGGR?

At ambient temperatures above 70°C, continuous 64-mA I_OL per output must be derated due to θ_JA = 89°C/W. With 5-V supply and worst-case power dissipation (~34 mA ICC), junction temperature exceeds 125°C above 75°C ambient. For full-output-current operation above 70°C, use forced airflow, copper pour, or reduce concurrent active outputs - the SN74ABT16541ADGGR datasheet specifies derating curves in Section 6.3.

Is SN74ABT16541ADGGR pin-compatible with SN74ABT16541ADLR in SSOP package?

Yes - both SN74ABT16541ADGGR (TSSOP-DGG) and SN74ABT16541ADLR (SSOP-DL) share identical 48-pin functional pinout, including matching V_CC, GND, OE, A, and Y assignments. Mechanical dimensions differ (DGG: 12.6 × 6.2 mm; DL: 15.4 × 7.5 mm), but PCB land patterns are not interchangeable. Use SN74ABT16541ADGGR for space-constrained designs and SN74ABT16541ADLR where hand-soldering or socket compatibility is required.