Texas Instruments SN74LVC827ADBR

Overview

SN74LVC827ADBR from Texas Instruments is a 10-bit noninverting buffer/driver with dual 3-state outputs, designed for 1.65 V to 3.6 V VCC operation. It delivers ±24 mA output drive at 3.3 V, supports 5.5-V-tolerant inputs, and achieves 6.7 ns max propagation delay at 3.3 V - enabling high-speed bus interfacing in mixed-voltage systems such as LED display drivers and telecom infrastructure backplanes.

For engineers reviewing the SN74LVC827ADBR datasheet, SN74LVC827ADBR pinout, SN74LVC827ADBR application, or SN74LVC827ADBR equivalent, key selection criteria include its dual-output-enable architecture (OE1/OE2), Ioff-enabled live insertion capability, 3-state timing parameters (ten/tdis), and SSOP-24 package compatibility with space-constrained industrial PCB layouts.

Technical Context

The SN74LVC827ADBR implements a dual-gated 3-state control logic where either OE1 or OE2 high forces all ten Y outputs into high-impedance mode - supporting flexible bus arbitration. Its CMOS design enables balanced rise/fall times and rail-to-rail output swing under load.

It features Ioff circuitry that disables outputs and blocks current backflow when VCC = 0 V, satisfying partial-power-down requirements. Input tolerance up to 5.5 V allows direct interfacing with legacy 5-V logic while operating from a 3.3-V supply - eliminating external level shifters in mixed-mode signal paths.

Key Specifications

Pinout & Package

SN74LVC827ADBR uses a 24-pin SSOP (DB) package with 5.00 mm × 4.40 mm body size and 0.65 mm lead pitch. The package is RoHS-compliant, moisture-sensitivity Level-1 rated, and optimized for automated surface-mount assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC827APWR, the SN74LVC827ADBR offers identical functionality in a slightly wider SSOP package better suited for manual rework and thermal relief in high-power-density zones; versus SN74LVCH16244ADGGR, it provides simpler 10-bit alignment and lower gate count for targeted peripheral expansion without over-provisioning.

Availability

SN74LVC827ADBR is available at Aetrix Electronics and suitable for LED display drivers, telecom infrastructure backplanes, server memory subsystems, industrial I/O expanders, and FPGA interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LVC827ADBR 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 interface ICs.

The SN74LVC827ADBR belongs to TI's LVC logic family - engineered for low-voltage, high-speed bus interfacing in mixed-signal systems where voltage translation, power sequencing robustness, and ESD resilience are critical.

FAQ

What is the maximum operating temperature range for the SN74LVC827ADBR?

The SN74LVC827ADBR is specified for continuous operation from –40°C to +125°C ambient temperature. This rating is validated per JEDEC JESD78 and confirmed in the Recommended Operating Conditions table of the official datasheet (SCAS306K, December 2014 revision). Thermal derating is not required within this range, and the device maintains full electrical performance including tpd ≤ 7.9 ns and VOH ≥ 2.2 V at VCC = 3.3 V across the entire span. The SN74LVC827ADBR uses TI's proven LVC process technology optimized for industrial thermal stability.

Does the SN74LVC827ADBR support live insertion or hot-swap applications?

Yes, the SN74LVC827ADBR supports live insertion via its Ioff feature, which actively disables outputs and blocks current backflow when VCC = 0 V. Per datasheet Section 9.3 and Absolute Maximum Ratings, Ioff leakage remains ≤ ±10 μA at VI/VO = 5.5 V and VCC = 0 V. This enables safe insertion into powered backplanes without disrupting upstream logic. The SN74LVC827ADBR also meets JESD78 latch-up immunity (>250 mA), further validating its use in modular telecom and server chassis where field-replaceable units require zero-power-state isolation.

Can the SN74LVC827ADBR interface directly between 5-V and 3.3-V logic domains?

Yes, the SN74LVC827ADBR accepts input voltages up to 5.5 V while operating from a 1.65–3.6 V VCC supply - enabling direct 5-V-to-3.3-V down-translation without external components. This is explicitly verified in the "Inputs Accept Voltages to 5.5 V" feature bullet and Electrical Characteristics table (VI absolute max = 6.5 V, recommended max = 5.5 V). The SN74LVC827ADBR outputs swing rail-to-rail (VOH ≈ VCC, VOL ≈ 0 V), so 3.3-V outputs remain compatible with downstream 3.3-V receivers. No series resistors or clamping diodes are needed.

What is the recommended bypass capacitor configuration for the SN74LVC827ADBR?

Texas Instruments recommends a 0.1 μF ceramic capacitor placed within 2 mm of the VCC pin (pin 24) and connected directly to the GND pin (pin 12) on the SN74LVC827ADBR. This is specified in Section 11 ("Power Supply Recommendations") of the datasheet. For boards with multiple VCC pins (not applicable to SN74LVC827ADBR's single-VCC design), additional 0.01–0.022 μF caps per pin are advised. Parallel placement of 0.1 μF + 1 μF capacitors is acceptable to suppress broadband noise, but the 0.1 μF unit is mandatory for high-frequency decoupling critical to maintaining the SN74LVC827ADBR's 6.7 ns tpd performance.

How does the dual output-enable (OE1/OE2) architecture of the SN74LVC827ADBR improve bus control?

Unlike single-OE buffers, the SN74LVC827ADBR's dual OE1/OE2 inputs implement a 2-input AND gate with active-low logic: both must be low to enable outputs. This allows hierarchical bus control - e.g., OE1 tied to system-level chip select and OE2 to local peripheral enable - preventing unintended output activation during reset or configuration. As confirmed in the Function Table (Section 9.4), any high OE forces all Y1–Y10 into high-impedance, eliminating bus contention risks. This architecture is especially valuable in multi-master systems where SN74LVC827ADBR serves as a programmable isolation gate between competing data sources.