Texas Instruments SN74ABT16827DL

Overview

SN74ABT16827DL from Texas Instruments is a noninverting 20-bit buffer/driver with dual 10-bit sections, 3-state outputs, ±32-mA high-drive capability, 5-V supply operation, and SSOP-56 package. It enables bidirectional data bus isolation in high-speed backplane and memory interface applications.

For engineers reviewing the SN74ABT16827DL datasheet, SN74ABT16827DL pinout, SN74ABT16827DL application, or SN74ABT16827DL equivalent, key selection criteria include output drive strength (–32 mA IOH / 64 mA IOL), power-up high-impedance behavior, distributed VCC/GND pinning for noise reduction, and flow-through architecture for PCB layout optimization.

Technical Context

This device implements two independent 10-bit buffer sections, each requiring both OE1 and OE2 inputs low to enable outputs; either OE high forces that section into high-impedance state. It uses EPIC-II^B BiCMOS process to achieve low power dissipation while maintaining TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V) and fast propagation delays (tPLH/tPHL ≤ 3.4 ns at 5 V).

It features distributed VCC and GND pins across the 56-pin SSOP package to minimize simultaneous switching noise, and includes built-in power-up/power-down high-impedance protection below 2.1 V VCC. Output ground bounce (VOLP) is specified < 1 V at 5 V and 25°C.

Key Specifications

Pinout & Package

SN74ABT16827DL is housed in a 56-pin Shrink Small-Outline Package (SSOP-DL), 300-mil body width, with 0.025-inch (0.635-mm) lead pitch and gull-wing leads. The package supports fine-pitch PCB assembly and provides thermal and electrical performance suitable for high-density logic interfaces.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 20-bit 3-state buffer applications.

Compared with SN74ABT162244DL and SN74LVC16244ADGGR, the SN74ABT16827DL delivers full 20-bit width in one package, native 5-V operation with TTL compatibility, and superior drive strength - making it optimal for retrofitting or maintaining legacy parallel bus infrastructure without redesign.

Availability

SN74ABT16827DL is available at Aetrix Electronics and suitable for industrial automation, backplane interconnect, and legacy system repair requiring stable component supply and long-term obsolescence management.

Supply support for SN74ABT16827DL 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 over 90 years of innovation in industrial, automotive, and communications markets.

The SN74ABT16827DL belongs to TI's Widebus™ family of high-speed bus-interface logic, designed specifically for noise-sensitive, high-density parallel data transfer in industrial control and telecom infrastructure.

FAQ

What is the operating voltage range for the SN74ABT16827DL?

The SN74ABT16827DL operates over a supply voltage range of 4.5 V to 5.5 V, fully compliant with standard 5-V TTL logic families. Operation outside this range - including below 4.5 V - is not guaranteed per datasheet specifications, and the device enters high-impedance state when VCC drops below 2.1 V during power-down sequences.

Does the SN74ABT16827DL support hot-swap applications?

Yes, the SN74ABT16827DL supports hot-swap use cases due to its inherent power-up/power-down high-impedance behavior below 2.1 V VCC and robust ±18 mA input clamp current. These features prevent bus contention and transient damage when inserted into live backplanes - though external pull-up resistors on OE pins are recommended above 2.1 V for deterministic control.

How many output-enable inputs does the SN74ABT16827DL have, and how do they function?

The SN74ABT16827DL has four output-enable inputs: 1OE1, 1OE2, 2OE1, and 2OE2 - two per 10-bit section. For either section's outputs to drive, both corresponding OE inputs must be low; if either is high, that section's outputs go high-impedance. This dual-OE architecture enables precise, fault-tolerant bus segment control.

What package type is used for the SN74ABT16827DL, and what are its key mechanical features?

The SN74ABT16827DL uses a 56-pin Shrink Small-Outline Package (SSOP-DL) with 300-mil body width and 0.025-inch lead pitch. Its gull-wing leads, distributed VCC/GND pins (5 VCC, 9 GND), and flow-through pin arrangement support fine-pitch assembly, low-noise routing, and thermal reliability in high-density industrial PCBs.

Can the SN74ABT16827DL replace older 74-series logic in existing designs?

Yes, the SN74ABT16827DL is a direct functional and pin-compatible upgrade for legacy 20-bit buffers like the 74F162244 or 74AS827, offering improved drive strength (–32 mA / 64 mA), lower ground bounce (<1 V), and enhanced latch-up immunity (>500 mA). No PCB changes are required, and it maintains identical logic behavior and timing margins.