Texas Instruments SN74LVC823ADBR

Overview

SN74LVC823ADBR from Texas Instruments is a 9-bit bus-interface D-type flip-flop with 3-state outputs, designed for 1.65 V to 3.6 V operation. It features clock-enable (CLKEN), asynchronous clear (CLR), and buffered output-enable (OE) controls; supports mixed-mode 5-V input/3.3-V VCC operation; and delivers 7.9 ns max propagation delay at 3.3 V - ideal for high-speed I/O port buffering in industrial control backplanes.

For engineers reviewing the SN74LVC823ADBR datasheet, SN74LVC823ADBR pinout, SN74LVC823ADBR application, or SN74LVC823ADBR equivalent, key selection considerations include its 24-pin SSOP (DB) package, Ioff partial-power-down support, 9-channel noninverting data path, 3.6 V absolute maximum input voltage tolerance, and compatibility with 5-V signal translation in 3.3-V systems.

Technical Context

This device implements nine edge-triggered D-type flip-flops synchronized to the rising edge of CLK, with CLKEN gating clock distribution and CLR forcing all Q outputs low asynchronously. The OE input places outputs in high-impedance state without affecting internal latch operation, enabling bus sharing and hot-swap capability.

Its LVC logic family ensures 1.65–3.6 V supply compatibility, 5.5 V-tolerant inputs, and Ioff protection that disables outputs during power-down to prevent current backflow. Timing is characterized across voltage and temperature, with 150 MHz max clock frequency at 3.3 V and setup/hold times as low as 1.3 ns.

Key Specifications

Pinout & Package

SN74LVC823ADBR uses a 24-pin Shrink Small-Outline Package (SSOP, DB) with 0.65 mm lead pitch, 7.7 mm × 4.4 mm body, and 1.2 mm max height per JEDEC MO-150. Pin 1 is located at top-left corner with index area marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC823ADBR, SN74LVC821ADBR offers identical functionality in an 8-bit form factor but cannot replace the 9-bit channel count, while SN74ALVC16835DLR provides double the width and enhanced drive strength at the cost of package size and loss of dedicated CLR - making SN74LVC823ADBR optimal for precise 9-bit, reset-critical industrial I/O expansion.

Availability

SN74LVC823ADBR is available at Aetrix Electronics and suitable for industrial backplane buffering, memory-mapped peripheral interfacing, and 5-V-to-3.3-V level translation requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for SN74LVC823ADBR 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 logic solutions with emphasis on reliability, scalability, and industrial-grade qualification.

The SN74LVC823A belongs to TI's LVC logic family - engineered for low-voltage, high-speed bus interface applications in industrial, automotive, and communications systems where mixed-voltage interoperability and power-aware design are critical.

FAQ

What is the absolute maximum input voltage rating for SN74LVC823ADBR?

The SN74LVC823ADBR supports an absolute maximum input voltage of 5.5 V on all data, clock, and control pins - independent of VCC. This allows direct interfacing with 5-V logic sources while operating from a 1.65–3.6 V supply, eliminating need for external level shifters in mixed-voltage systems. The rating is validated per TI's absolute maximum ratings table and applies under both powered and unpowered conditions.

Does SN74LVC823ADBR support partial power-down operation?

Yes, SN74LVC823ADBR includes Ioff circuitry that actively disables outputs when VCC = 0 V, preventing damaging current backflow from live inputs into the unpowered device. This feature is explicitly specified in the datasheet and enables safe use in hot-pluggable modules or multi-rail systems where subsystems power up/down independently - a requirement confirmed by JESD 78 compliance testing.

What is the propagation delay (tpd) of SN74LVC823ADBR at 3.3 V?

The maximum propagation delay (tpd) of SN74LVC823ADBR is 7.9 ns at VCC = 3.3 V, TA = 25°C, as measured from CLK↑ to Q transition under standard load conditions (CL = 50 pF). This value is guaranteed across the full operating temperature range (–40°C to +85°C) and represents worst-case timing for design margining in high-speed synchronous interfaces.

Can SN74LVC823ADBR be used as a level translator between 5-V and 3.3-V systems?

Yes, SN74LVC823ADBR functions as a unidirectional level translator: its inputs tolerate up to 5.5 V while operating from a 3.3-V VCC, and its outputs swing rail-to-rail within the 3.3-V domain. This capability is explicitly documented in the "Supports Mixed-Mode Signal Operation" feature and verified across recommended operating conditions - making it suitable for translating control or data signals from 5-V peripherals to 3.3-V controllers without external components.

What package type and dimensions does SN74LVC823ADBR use?

SN74LVC823ADBR uses a 24-pin SSOP (Shrink Small-Outline Package) with designation DB, measuring 7.7 mm × 4.4 mm with 0.65 mm lead pitch and 1.2 mm max height. Its mechanical outline conforms to JEDEC MO-150, and land pattern recommendations are provided in TI's packaging documentation - ensuring reliable solder joint formation and thermal performance in automated assembly processes.