Texas Instruments SN74ABT16853DL

Overview

SN74ABT16853DL from Texas Instruments is a dual 8-bit-to-9-bit parity bus transceiver with integrated parity generator/checker, latch-enabled error flag (ERR), and open-collector ERR output. It operates at 4.5–5.5 V, supports –40°C to 85°C, delivers ±32-mA/64-mA drive strength, and implements flow-through architecture for optimized PCB layout in high-speed data bus isolation applications.

For engineers reviewing the SN74ABT16853DL datasheet, SN74ABT16853DL pinout, SN74ABT16853DL application, or SN74ABT16853DL equivalent, key selection criteria include its dual-directional parity-aware bus isolation capability, latch-controlled ERR flag storage/clear functionality, distributed V_CC/GND pinning for noise reduction, and compatibility with 5-V TTL-level systems requiring diagnostic parity validation.

Technical Context

The SN74ABT16853DL integrates two independent 8-bit transceivers, each with dedicated A and B I/O ports, OEA/OEB enable controls, and shared PARITY/ERR/LE/CLR logic. Its parity engine computes odd parity across eight data bits plus PARITY input, generating inverted parity during A→B transfer for system diagnostics.

ERR is an open-collector output latched via LE and cleared via CLR; timing parameters specify minimum LE pulse width of 8.5 ns and CLR low pulse width of 4 ns. The device uses EPIC-II^B BiCMOS process to achieve low ground bounce (<1 V VOLP) and latch-up immunity >500 mA per JEDEC JESD-17.

Key Specifications

Pinout & Package

SN74ABT16853DL is housed in a 56-pin plastic shrink small-outline (SSOP) package (DL), 300-mil body width, with 0.025-inch center-to-center lead pitch and gull-wing leads. Pin numbering follows standard top-view orientation with index mark at Pin 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 8-bit parity transceiver applications.

Compared with SN74ABT16853DL, SN74ABT162245DL omits all parity infrastructure-reducing complexity but eliminating error detection-while SN74LVC16835DL shifts to 3.3-V logic, sacrificing 5-V interoperability and hardware-level error flag management essential for industrial diagnostics.

Availability

SN74ABT16853DL is available at Aetrix Electronics and suitable for industrial PLCs, telecom backplanes, diagnostic test equipment, and legacy bus extension systems requiring stable component supply, long-term lifecycle support, and guaranteed 5-V TTL compatibility.

Supply support for SN74ABT16853DL 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 SN74ABT16853DL belongs to TI's Widebus™ family of high-speed bus interface devices, engineered specifically for robust, low-noise data transfer in industrial and communications infrastructure where parity-checked integrity and deterministic timing are mandatory.

FAQ

What is the operating voltage range for the SN74ABT16853DL?

The SN74ABT16853DL operates over a supply voltage range of 4.5 V to 5.5 V, fully compliant with standard 5-V TTL logic families. This range ensures stable performance across variations in power supply regulation and temperature drift, and it is validated across the full industrial temperature range of –40°C to +85°C. Operation outside this window may compromise output drive strength, timing margins, or latch-up immunity.

How does the SN74ABT16853DL handle parity error detection and reporting?

The SN74ABT16853DL generates odd parity during A→B data transfer and validates parity during B→A transfer, asserting its open-collector ERR output low upon mismatch. The ERR state can be sampled, stored in an internal latch via LE, or cleared using CLR-enabling precise hardware-level error tracking without software intervention. This behavior is confirmed in the function table and ERR waveforms of the official datasheet.

Can the SN74ABT16853DL be used in hot-swap or partial-power-down scenarios?

Yes-the SN74ABT16853DL features high-impedance outputs during power-up/down when OE is tied to V_CC via a pullup resistor. The datasheet specifies that OE should connect to V_CC through a resistor sized to match the driver's current-sinking capability, ensuring buses remain isolated until supply stabilization. This makes SN74ABT16853DL suitable for modular systems requiring live insertion.

What package type is used for the SN74ABT16853DL, and what are its mechanical characteristics?

The SN74ABT16853DL uses a 56-pin plastic shrink small-outline package (DL), measuring 300 mils wide with 0.025-inch lead pitch and gull-wing terminations. Its θ_JA is 74°C/W, supporting thermal management in compact industrial enclosures. Pin 1 is marked with a notch or dot, and the top-view pinout matches the DL-package diagram in the SCBS153B datasheet.

Does the SN74ABT16853DL support inverted parity generation, and why is it useful?

Yes-the SN74ABT16853DL enters inverted parity mode when both OEA and OEB are low, forcing a deliberate parity error. This feature is explicitly documented in the function table and enables system-level diagnostic validation: engineers can verify ERR flag assertion, latch capture, and downstream error-handling logic without introducing actual data corruption. It is a design-intent feature, not a failure mode.