Texas Instruments SN74ABT16240ADGGR

Overview

SN74ABT16240ADGGR from Texas Instruments is a 16-bit inverting buffer/driver with 3-state outputs, designed for high-density memory address, clock, and bus interface applications. It operates from 4.5 V to 5.5 V, delivers ±32 mA high-drive outputs (IOH/–32 mA, IOL/64 mA), features distributed VCC/GND pinning to suppress switching noise, and is rated for –40°C to 85°C industrial operation.

For engineers reviewing the SN74ABT16240ADGGR datasheet, SN74ABT16240ADGGR pinout, SN74ABT16240ADGGR application, or SN74ABT16240ADGGR equivalent, this device serves as a high-speed, low-ground-bounce solution for 3-state bus driving where symmetrical active-low OE control, flow-through PCB layout, and latch-up immunity (>500 mA per JESD17) are critical design requirements.

Technical Context

This device belongs to TI's Widebus™ family and employs EPIC-II™B BiCMOS process technology to achieve low power dissipation while maintaining TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V) and fast propagation delays (tPLH/tPHL ≤ 4.7 ns at 5 V, CL = 50 pF). Its four independent 4-bit sections each feature inverting logic and dedicated active-low output-enable inputs.

The architecture uses distributed power/ground pins and flow-through signal routing (A→Y, OE→Y) to minimize simultaneous switching noise and simplify PCB trace routing. Output ground bounce (VOLP) is specified <1 V at VCC = 5 V, TA = 25°C, enabling reliable operation in noise-sensitive digital systems.

Key Specifications

Pinout & Package

TSSOP-48 (DGG) package: 48-pin thin shrink small-outline, 0.5 mm pitch, 12.6 mm × 6.1 mm body, 1.2 mm max height, RoHS-compliant NiPdAu lead finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit inverting 3-state buffer applications.

Compared with SN74ABT16240ADGGR, SN74ABT16244ADGGR preserves signal polarity at identical speed and drive, while SN74LVC16244ADGGR trades 5-V compatibility and output strength for lower voltage operation and reduced static power - making each suitable for distinct voltage-domain and logic-polarity constraints.

Availability

SN74ABT16240ADGGR is available at Aetrix Electronics and suitable for industrial control systems, test equipment, and legacy computing platforms requiring stable component supply, long-term obsolescence management, and guaranteed 5-V TTL interoperability.

Supply support for SN74ABT16240ADGGR 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 expertise in high-reliability interface and bus technologies.

The SN74ABT16240ADGGR belongs to TI's Widebus™ family of advanced bus-interface ICs, engineered specifically for high-speed, low-noise memory addressing, clock distribution, and 3-state bus driving in industrial and computing applications.

FAQ

What is the recommended power-up sequence for SN74ABT16240ADGGR to ensure high-impedance outputs?

TI specifies that OE inputs must be held high (inactive) during power-up to guarantee 3-state outputs. Tie each OE pin (1OE, 2OE, 3OE, 4OE) to VCC via a pull-up resistor; minimum value depends on the driver's sink capability but ≥10 kΩ is typical. This prevents bus contention before system initialization completes. The SN74ABT16240ADGGR does not include internal power-on reset circuitry, so external biasing is mandatory.

Can SN74ABT16240ADGGR drive a 100-pF load while maintaining timing specifications?

No - the published switching characteristics (e.g., tPLH ≤ 4.7 ns) are measured at CL = 50 pF. Driving 100 pF increases propagation delay and rise/fall times beyond datasheet limits; actual tPLH may exceed 7 ns. For heavier loads, verify timing margins in-system or add series termination. The SN74ABT16240ADGGR output stage remains functional but timing compliance is not guaranteed above 50 pF without derating.

Does SN74ABT16240ADGGR support hot-swap insertion into a live 5-V bus?

The SN74ABT16240ADGGR has no built-in hot-swap protection, but its input clamp current (–18 mA) and output clamp current (–50 mA) allow limited tolerance of brief overvoltage transients during insertion. To ensure reliability, use current-limiting resistors on OE and data lines, and sequence VCC before signal application. TI does not characterize or guarantee hot-swap operation for SN74ABT16240ADGGR.

How does the distributed VCC/GND pin configuration in SN74ABT16240ADGGR reduce switching noise?

The SN74ABT16240ADGGR places four VCC and eight GND pins across the package perimeter to minimize loop inductance and distribute return current paths. This reduces simultaneous switching output (SSO) noise by lowering ∆I/∆t-induced voltage spikes on shared supply rails - directly enabling cleaner signal edges and improved noise margins in high-speed bus applications compared to conventional single-rail packages.

Is SN74ABT16240ADGGR pin-compatible with SN74ABT16240ADGVR?

Yes - both SN74ABT16240ADGGR (TSSOP-48, DGG) and SN74ABT16240ADGVR (TVSOP-48, DGV) share identical pin numbering, function mapping, and electrical specifications. The only differences are package thickness (1.2 mm vs. 1.0 mm) and body width (6.1 mm vs. 4.4 mm); PCB land patterns require minor adjustments for solder mask and stencil design, but no netlist or schematic changes are needed.