Texas Instruments SN74LVC863ADGVR

Overview

SN74LVC863ADGVR from Texas Instruments is a 9-bit bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between A and B buses in 1.65-V to 3.6-V systems. It supports mixed-mode signaling (5-V inputs with 3.3-V VCC), features dual independent output-enable controls (OEAB1/OEAB2 and OEBA1/OEBA2), and delivers 6.1 ns max propagation delay at 3.3 V - enabling use in high-speed industrial backplanes and FPGA I/O bridging.

For engineers reviewing the SN74LVC863ADGVR datasheet, SN74LVC863ADGVR pinout, SN74LVC863ADGVR application, or SN74LVC863ADGVR equivalent, key selection criteria include its 24-pin TVSOP package, Ioff partial-power-down support, ±24-mA drive strength at 3 V, and guaranteed 3.6-V tolerant inputs - critical for voltage-level translation in heterogeneous digital subsystems.

Technical Context

The SN74LVC863ADGVR implements dual-directional 9-bit data flow controlled by four independent 3-state enable inputs (OEAB1, OEAB2, OEBA1, OEBA2), allowing simultaneous or selective A→B and B→A transmission. Its logic diagram confirms noninverting signal path with no internal latching beyond the functional table's "Latch A and B" mode.

It integrates Ioff circuitry to disable outputs during power-down, preventing backflow current when VCC = 0 V, and meets JESD 17 latch-up immunity (>250 mA). Input tolerance up to 5.5 V and output VOH/VOL specs (e.g., VOL = 0.55 V at IOL = 24 mA, VCC = 3 V) confirm robust interfacing across 3.3-V/5-V domains.

Key Specifications

Pinout & Package

SN74LVC863ADGVR uses a 24-pin Thin Very Small Outline Package (TVSOP, DGV), 4.4 mm × 6.6 mm body, 0.4 mm pitch, 1.2 mm max height, JEDEC MO-153 compliant, with pin 1 in quadrant Q1 per tape-and-reel orientation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 9-bit bus transceiver applications.

Compared with SN74LVC863APWR, SN74LVC863ADGVR offers superior thermal performance (86°C/W vs. 88°C/W) and 35% smaller PCB area; versus SN74AVC863A, it retains full 5.5-V input tolerance essential for industrial 5-V legacy integration - making SN74LVC863ADGVR the optimal choice for mixed-voltage, space-constrained, thermally demanding applications.

Availability

SN74LVC863ADGVR is available at Aetrix Electronics and suitable for industrial backplane interfaces, FPGA I/O expansion, automotive body control modules, and mixed-voltage test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LVC863ADGVR 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 personal electronics markets.

The SN74LVC863A belongs to TI's LVC logic family - engineered for low-voltage, high-speed, mixed-signal interoperability in space-constrained and thermally demanding embedded systems.

FAQ

What is the maximum clock/data rate supported by SN74LVC863ADGVR?

The SN74LVC863ADGVR does not operate on a clock; it is an asynchronous transceiver. Its 6.1 ns max propagation delay at 3.3 V supports reliable data transfer up to approximately 100 MHz in well-terminated point-to-point configurations. Actual achievable rate depends on trace length, loading, and system timing margins - design validation requires measurement of setup/hold times using the device's specified tpd, ten, and tdis values.

Can SN74LVC863ADGVR safely interface a 5-V microcontroller to a 3.3-V FPGA?

Yes. The SN74LVC863ADGVR accepts 5-V inputs while operating at VCC = 3.3 V, and drives 3.3-V logic levels with VOL ≤ 0.55 V and VOH ≥ 2.2 V at 24-mA load. This makes SN74LVC863ADGVR ideal for bidirectional level translation between 5-V MCUs and 3.3-V FPGAs without external biasing or resistors.

Does SN74LVC863ADGVR require external pull-up resistors on OE pins?

TI recommends tying OEAB1, OEAB2, OEBA1, and OEBA2 to VCC through pull-up resistors during power-up to guarantee high-impedance outputs. Minimum resistor value depends on driver sink capability; typical 10-kΩ resistors suffice for most CMOS drivers. Leaving OE pins floating risks undefined output states and potential bus contention.

Is SN74LVC863ADGVR compatible with lead-free PCB assembly processes?

Yes. SN74LVC863ADGVR carries RoHS-compliant NIPDAU lead finish and is rated MSL Level-1 (unlimited floor life at ≤30°C/60% RH), qualified for standard Pb-free reflow profiles up to 260°C peak. Its TVSOP package meets JEDEC MO-153 standards and supports standard stencil design with 0.125-mm thickness.

How does the Ioff feature of SN74LVC863ADGVR protect system-level power sequencing?

The Ioff circuitry in SN74LVC863ADGVR disables all outputs when VCC = 0 V, limiting leakage current to ±10 µA even with 5.5-V signals applied to I/O pins. This prevents damaging back-current flow from powered buses into unpowered sections - a critical safeguard during hot-plug events, partial power-down modes, or staggered supply ramp-up in multi-rail systems containing SN74LVC863ADGVR.