Texas Instruments SN74LVC827ADWR

Overview

SN74LVC827ADWR from Texas Instruments is a 10-bit noninverting buffer/driver with 3-state outputs, designed for 1.65-V to 3.6-V V_CC operation. It features dual active-low output-enable inputs (OE1, OE2), 5.5-V-tolerant inputs, 24-mA output drive at 3.3 V, and 6.7-ns typical propagation delay - enabling high-speed bus interfacing in mixed-voltage systems such as LED display drivers and telecom backplanes.

For engineers reviewing the SN74LVC827ADWR datasheet, SN74LVC827ADWR pinout, SN74LVC827ADWR application, or SN74LVC827ADWR equivalent, key selection criteria include its I_off support for live insertion, 3.3-V/5-V mixed-mode signal translation capability, thermal performance in SOIC-24 package, and compatibility with high-drive bus loading requirements up to 150 MHz.

Technical Context

The SN74LVC827ADWR implements a dual-gated 3-state control architecture: both OE1 and OE2 must be low to enable all ten Y outputs; either high forces all outputs into high-impedance. Its CMOS design supports balanced output drive and operates across –40°C to +125°C with full I_off protection when V_CC = 0 V.

Input tolerance to 5.5 V enables direct interfacing with legacy 5-V logic while powered from 3.3 V or lower, eliminating external level shifters. The device exhibits low ground bounce (< 0.8 V) and VOH undershoot (> 2 V) at 3.3 V, ensuring signal integrity in noise-sensitive applications.

Key Specifications

Pinout & Package

SN74LVC827ADWR uses a 24-pin SOIC (DW) package with 15.40 mm × 7.50 mm body size and standard 1.27-mm lead pitch. The package is RoHS-compliant, moisture-sensitivity level 1 (MSL-1), and rated for reflow up to 260°C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit buffer applications.

Compared with SN74LVC827APWR, the SN74LVC827ADWR offers superior thermal dissipation in SOIC packaging (R_θJA = 65.1°C/W vs. 88.9°C/W for TSSOP) and easier manual soldering; versus SN74LVCH162244ADGGR, it delivers guaranteed 5.5-V input tolerance across all A pins - critical for legacy 5-V system integration.

Availability

SN74LVC827ADWR is available at Aetrix Electronics and suitable for LED display drivers, telecom backplane interfaces, and industrial I/O expanders requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LVC827ADWR 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 50 years of innovation in high-reliability digital interface ICs.

The SN74LVC827A product line delivers high-drive, voltage-tolerant bus interface logic optimized for mixed-signal system interconnect in industrial automation, communications infrastructure, and computing platforms.

FAQ

What is the maximum operating temperature for SN74LVC827ADWR?

The SN74LVC827ADWR is specified for continuous operation from –40°C to +125°C ambient temperature. This extended range is validated per JEDEC JESD78 and supported by thermal metrics including R_θJA = 65.1°C/W in the SOIC-24 package, making SN74LVC827ADWR suitable for enclosed telecom chassis and industrial control cabinets without forced air cooling.

Does SN74LVC827ADWR support 5-V input signals while powered from 3.3 V?

Yes, SN74LVC827ADWR accepts input voltages up to 5.5 V regardless of V_CC level - confirmed in Section 7.3 (Recommended Operating Conditions) and Feature Description. When V_CC = 3.3 V, all A1–A10 inputs tolerate 0–5.5 V, enabling direct connection to 5-V microcontrollers without level-shifting components. This behavior is intrinsic to the LVC process and applies to every SN74LVC827ADWR unit.

How does the dual output-enable (OE1/OE2) logic work on SN74LVC827ADWR?

The SN74LVC827ADWR uses an AND-gated 3-state control: both OE1 and OE2 must be driven low to enable Y1–Y10 outputs. If either OE1 or OE2 is high, all ten outputs enter high-impedance state - verified in Table 1 (Function Table) and Section 9.4. This architecture allows flexible bus arbitration, e.g., using OE1 for system-level enable and OE2 for local module control, ensuring deterministic bus release in multi-master systems.

What is the recommended bypass capacitor for SN74LVC827ADWR?

Texas Instruments recommends a 0.1-μF ceramic capacitor placed as close as possible to the V_CC pin (pin 24) and GND (pin 12) of SN74LVC827ADWR. Per Section 11, this minimizes power-supply noise and stabilizes transient current demands during output switching. For systems with multiple SN74LVC827ADWR devices, a bulk 1-μF capacitor may be added in parallel, but the 0.1-μF local cap remains mandatory for each SN74LVC827ADWR instance.

Is SN74LVC827ADWR pin-compatible with other 24-pin LVC buffers?

SN74LVC827ADWR shares the same SOIC-24 pinout as SN74LVC827ADW and SN74LVC827ADWR.B per TI's Package Drawing DW0024A, but is not pin-compatible with unrelated 10-bit buffers like SN74ALVC162244 (48-pin TSSOP) or SN74LVC125A (14-pin SOIC). Pin compatibility is limited to the SN74LVC827A family variants in SOIC-24; always verify against the specific variant's Pin Configuration diagram before substitution.