Texas Instruments SN74ABT16540ADGGR

Overview

SN74ABT16540ADGGR from Texas Instruments is an inverting 16-bit buffer/driver with dual 3-state output-enable control, designed for high-speed bus interface applications. It delivers –32-mA high-level and 64-mA low-level output drive, operates from 4.5 V to 5.5 V, and is rated for –40°C to 85°C industrial temperature range in a 48-pin TSSOP (DGG) package.

For engineers reviewing the SN74ABT16540ADGGR datasheet, SN74ABT16540ADGGR pinout, SN74ABT16540ADGGR application, or SN74ABT16540ADGGR equivalent, this device is selected for wide-data-path buffering where high-current drive, low ground bounce (<1 V), and flow-through PCB layout optimization are critical.

Technical Context

The SN74ABT16540ADGGR implements two independent 8-bit inverting buffer sections, each with separate active-low 2-input AND-gated output-enable (OE1/OE2) logic - enabling per-section 3-state control. Its EPIC-II^B BiCMOS process reduces power dissipation while maintaining TTL-compatible input thresholds (V_IL = 0.8 V, V_VIH = 2 V).

It features distributed V_CC/GND pinning to suppress high-speed switching noise, latch-up immunity >500 mA per JESD-17, and propagation delays as low as 1 ns (t_PLH/t_PHL) at 25°C with 50-pF load. The flow-through architecture aligns inputs on one side and outputs on the opposite, minimizing trace crossovers.

Key Specifications

Pinout & Package

SN74ABT16540ADGGR is housed in a 48-pin Thin Shrink Small-Outline Package (TSSOP, DGG), 7.0 mm × 12.5 mm body, 0.5-mm pitch, RoHS-compliant NIPDAU finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ABT16540ADGGR, SN74ABT162244ADGGR preserves signal polarity but demands logic-level verification, while SN74LVC16244ADGGR offers lower voltage operation at the cost of pinout incompatibility and reduced drive - making SN74ABT16540ADGGR optimal for existing 5-V industrial bus interfaces requiring inverting drive.

Availability

SN74ABT16540ADGGR is available at Aetrix Electronics and suitable for industrial control backplanes, memory subsystems, and test equipment requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for SN74ABT16540ADGGR 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 SN74ABT16540ADGGR belongs to TI's Widebus™ family of high-speed bus interface devices, engineered specifically for robust 5-V data path buffering in industrial, telecom, and computing infrastructure.

FAQ

What is the logic function of the SN74ABT16540ADGGR?

The SN74ABT16540ADGGR is an inverting 16-bit buffer/driver composed of two independent 8-bit sections. Each section accepts true logic inputs (A) and produces inverted outputs (Y), with separate active-low 2-input AND-gated output-enable controls (OE1/OE2). This allows selective 3-state control of either 8-bit group without affecting the other - essential for segmented bus architectures. The SN74ABT16540ADGGR does not include latching or storage functionality.

Does the SN74ABT16540ADGGR support 3.3-V input levels?

Yes - the SN74ABT16540ADGGR has TTL-compatible input thresholds (V_IL ≤ 0.8 V, V_VIH ≥ 2.0 V at V_CC = 4.5–5.5 V), allowing reliable recognition of 3.3-V logic-high signals from modern microcontrollers and FPGAs. Its input clamp current rating (–18 mA) further enhances robustness against overvoltage transients when interfacing mixed-voltage domains. The SN74ABT16540ADGGR does not require level shifters for 3.3-V-to-5-V translation in most cases.

What is the recommended power-up sequencing for the SN74ABT16540ADGGR?

To ensure outputs remain in high-impedance state during power-up or power-down, TI recommends tying OE1 and OE2 to V_CC through pullup resistors. The minimum resistor value is determined by the driver's current-sinking capability - typically 4.7 kΩ suffices given the SN74ABT16540ADGGR's I_OFF ≤ ±100 µA and I_I ≤ ±1 µA. This prevents bus contention when V_CC ramps or system reset is asserted. The SN74ABT16540ADGGR does not incorporate internal power-on reset circuitry.

Can the SN74ABT16540ADGGR drive a 50-pF load at 100 MHz?

Yes - the SN74ABT16540ADGGR is characterized with CL = 50 pF and achieves t_PLH/t_PHL ≤ 4.2 ns at V_CC = 5 V and T_A = 25°C, supporting clean signal edges up to ~200 MHz fundamental frequency. Its high drive strength (64 mA I_OL) maintains fast rise/fall times into such loads, and distributed V_CC/GND pins minimize simultaneous switching noise. For sustained 100-MHz operation, thermal derating per θ_JA = 89°C/W must be observed - the SN74ABT16540ADGGR remains within safe junction limits under typical industrial ambient conditions.

Is the SN74ABT16540ADGGR pin-compatible with other 48-pin TSSOP logic devices?

No - the SN74ABT16540ADGGR has a unique pinout optimized for flow-through layout (inputs left, outputs right, distributed power/ground), differing from standard 48-pin TSSOP logic families like LVC or AHC. While it shares the DGG package outline and 0.5-mm pitch with other TI 48-pin TSSOPs, pin functions (e.g., OE placement, V_CC/GND distribution) are specific to the Widebus™ ABT series. Substitution requires schematic and layout validation - the SN74ABT16540ADGGR is not a generic drop-in replacement.