Texas Instruments SN74ABT16240ADL

Overview

SN74ABT16240ADL 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/±64 mA output drive, features flow-through pinout, distributed V_CC/GND, and supports –40°C to 85°C industrial temperature range.

For engineers reviewing the SN74ABT16240ADL datasheet, SN74ABT16240ADL pinout, SN74ABT16240ADL application, or SN74ABT16240ADL equivalent, key selection criteria include 3-state bus isolation capability, high-current drive strength, ground-bounce performance (<1 V VOLP), and SSOP-48 package compatibility with dense PCB layouts.

Technical Context

This device implements four independent 4-bit inverting buffers, each with symmetrical active-low output-enable (OE) control. All inputs are TTL-compatible, and outputs support high-speed switching with t_PLH/t_PHL ≤ 4.7 ns (V_CC = 5 V, T_A = 25°C, C_L = 50 pF).

The EPIC-II^B BiCMOS process enables low power dissipation while maintaining robust latch-up immunity (>500 mA per JESD17) and ESD protection (>2000 V HBM, >200 V machine model). Distributed power/ground pins and flow-through architecture minimize simultaneous switching noise and simplify PCB routing.

Key Specifications

Pinout & Package

SN74ABT16240ADL uses a 48-pin Shrink Small-Outline Package (SSOP-DL) with 0.5-mm lead pitch, 12.6 mm × 6.2 mm body size, and 1.2-mm max height. Pin 1 is located at top-left corner with notch or index mark.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ABT16244ADL and SN74LVC16244ADGGR, SN74ABT16240ADL provides unique inverting logic in a 5-V tolerant, high-drive SSOP package-making it irreplaceable in legacy bus architectures requiring polarity inversion and robust noise margin.

Availability

SN74ABT16240ADL is available at Aetrix Electronics and suitable for industrial control systems, legacy computing upgrades, and test equipment requiring stable component supply with long-term lifecycle support.

Supply support for SN74ABT16240ADL 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The SN74ABT16240ADL belongs to TI's Widebus™ family of high-speed bus interface ICs, engineered specifically for noise-resilient, high-density memory and clock distribution in 5-V systems.

FAQ

What is the recommended power-up sequence for SN74ABT16240ADL to ensure 3-state safety?

TI specifies that OE inputs must be held high (inactive) during power-up to guarantee high-impedance outputs. For SN74ABT16240ADL, tie each OE pin (1OE, 2OE, 3OE, 4OE) to V_CC via a pullup resistor - minimum value determined by the driver's sink capability. This prevents bus contention before system initialization completes. The SN74ABT16240ADL datasheet confirms this requirement in Section 1.

Does SN74ABT16240ADL support mixed-voltage operation between 3.3 V and 5 V logic domains?

No. SN74ABT16240ADL is specified only for 4.5 V to 5.5 V V_CC operation and has TTL-compatible input thresholds (V_IL = 0.8 V, V_IH = 2.0 V). Its inputs are not 5-V tolerant when powered from 3.3 V, and its outputs swing rail-to-rail at 5 V - making direct interfacing with 3.3-V logic unsafe without level-shifting circuitry. SN74ABT16240ADL is strictly a 5-V device.

How does the distributed V_CC/GND pin configuration in SN74ABT16240ADL improve signal integrity?

The SN74ABT16240ADL places four V_CC and seven GND pins across the perimeter to minimize power delivery inductance and reduce simultaneous switching output (SSO) noise. This layout lowers ground bounce (V_OLP < 1 V measured) and maintains stable reference planes - critical for maintaining timing margins in high-speed 16-bit bus applications. The effect is validated in TI's SCBS095G datasheet Figure 1 and electrical test data.

Can SN74ABT16240ADL be used as a level translator between 5-V and 3.3-V systems?

No. SN74ABT16240ADL is not a level translator. Its inputs require TTL-level thresholds referenced to its own 5-V V_CC, and its outputs swing between 0 V and 5 V. Driving a 3.3-V input with SN74ABT16240ADL outputs risks overvoltage damage. For level translation, use purpose-built devices like TXB0108 or SN74AVC16T245. SN74ABT16240ADL functions solely as a 5-V bus buffer.

What is the maximum capacitive load SN74ABT16240ADL can drive while maintaining specified timing?

TI characterizes SN74ABT16240ADL switching parameters at C_L = 50 pF, which represents typical board trace + input capacitance of connected devices. While the device can drive higher loads (e.g., 100 pF), propagation delays increase nonlinearly - t_PLH may exceed 8 ns at 100 pF. For guaranteed timing compliance, keep total load ≤ 50 pF per output. This constraint is documented in the "Switching Characteristics" table of the SN74ABT16240ADL datasheet.