Texas Instruments SN74LVC823ADGVR

Overview

SN74LVC823ADGVR 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/3.3-V I/O, and delivers 7.9 ns max propagation delay at 3.3 V - ideal for high-speed I/O buffering in FPGA-adjacent data paths.

For engineers reviewing the SN74LVC823ADGVR datasheet, SN74LVC823ADGVR pinout, SN74LVC823ADGVR application, or SN74LVC823ADGVR equivalent, key selection considerations include its TVSOP-24 package footprint, Ioff partial-power-down support, 5.5-V-tolerant inputs, 24-mA output drive capability at 3 V, and compatibility with capacitive bus loads up to 50 pF.

Technical Context

This device implements nine edge-triggered D-type latches synchronized to the rising edge of CLK, with CLKEN gating clock distribution and CLR forcing all Q outputs low asynchronously. Its 3-state outputs are controlled independently by OE, which does not affect internal latch state retention.

The SN74LVC823ADGVR uses LVC logic family architecture with Schmitt-trigger input hysteresis on control pins (CLKEN, CLR, OE), supports 150 MHz maximum clock frequency at 3.3 V, and includes Ioff circuitry to block current backflow during power-down - enabling safe hot-insertion in multi-rail systems.

Key Specifications

Pinout & Package

SN74LVC823ADGVR is housed in a 24-pin Thin Very Small Outline Package (TVSOP-DGV), 4.4 mm × 6.6 mm body size, 1.2 mm max height, 0.4 mm lead pitch, and exposed metal thermal pad (non-electrical). Pin 1 is located at top-left corner with index mark 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-interface flip-flop applications.

Compared with SN74LVC823ADGVR, SN74LVC821ADGVR offers identical performance in an 8-bit configuration but cannot replace the full 9-bit functionality, while 74LVC574APW,118 sacrifices integrated clock gating and bit count for reduced pin count - making SN74LVC823ADGVR the optimal choice for 9-bit synchronous bus isolation with minimal external logic.

Availability

SN74LVC823ADGVR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, FPGA configuration bus buffering, automotive body control modules, test equipment digital pattern generation, and high-speed parallel data acquisition requiring stable component supply and long-term lifecycle support.

Supply support for SN74LVC823ADGVR 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 and timing products.

The SN74LVC823ADGVR belongs to TI's LVC logic family - engineered for low-voltage, high-speed bus interfacing in mixed-signal systems where power efficiency, noise immunity, and interoperability across voltage domains are critical design requirements.

FAQ

What is the maximum clock frequency supported by the SN74LVC823ADGVR?

The SN74LVC823ADGVR supports a maximum clock frequency of 150 MHz at VCC = 3.3 V, as specified in the timing requirements table. This rating assumes proper signal integrity, load capacitance ≤50 pF, and ambient temperature within –40°C to +85°C. At lower VCC (e.g., 1.8 V), maximum frequency decreases to 150 MHz only under relaxed timing conditions; actual usable frequency depends on board layout and termination.

Does the SN74LVC823ADGVR support hot-swap or partial-power-down operation?

Yes, the SN74LVC823ADGVR includes Ioff circuitry that actively disables outputs when VCC = 0 V, limiting off-state leakage to ±10 µA. This feature enables safe insertion into live backplanes or multi-rail systems where other supplies remain active - a key requirement for modular industrial controllers and telecom line cards using the SN74LVC823ADGVR.

Can the SN74LVC823ADGVR interface directly between 5-V and 3.3-V logic domains?

Yes, the SN74LVC823ADGVR accepts input voltages up to 5.5 V on all pins while operating from a 1.65–3.6 V VCC supply. This allows direct connection of 5-V microcontrollers or sensors to its D, CLKEN, CLR, and OE inputs, with outputs referenced to the local 3.3-V rail - eliminating external level translators in mixed-voltage systems using the SN74LVC823ADGVR.

What is the purpose of the CLKEN pin on the SN74LVC823ADGVR?

The CLKEN (clock enable) pin on the SN74LVC823ADGVR is an active-low control that gates the internal clock path to the nine D-type latches. When CLKEN = L, data propagates on each CLK rising edge; when CLKEN = H, the clock buffer is disabled and outputs retain their last-latched state - enabling precise data hold timing without external flip-flop chaining or additional logic, a core function of the SN74LVC823ADGVR.

Is the SN74LVC823ADGVR pin-compatible with other packages in the same family?

No, the SN74LVC823ADGVR uses the TVSOP-24 (DGV) package with 0.4 mm lead pitch and 4.4 mm × 6.6 mm body size. While electrically identical to SN74LVC823A variants in SOIC (DW), SSOP (DB), and TSSOP (PW) packages, its pinout matches only other DGV-packaged devices - mechanical incompatibility prevents direct PCB replacement without layout revision. Always verify land pattern against TI's DGV0024A outline when designing with SN74LVC823ADGVR.