NXP Semiconductors 74LVC823ABQ,118

Overview

74LVC823ABQ,118 from Nexperia is a 9-bit positive-edge-triggered D-type flip-flop with independent clock enable (CE), master reset (MR), and 3-state outputs (Q0–Q8), operating from 1.2 V to 3.6 V supply. It features 5 V tolerant inputs/outputs, supports mixed-voltage bus interfacing (3.3 V core ↔ 5 V peripherals), and delivers ≤10 ns propagation delay at 3.3 V for high-speed register applications in industrial control backplanes.

For engineers reviewing the 74LVC823ABQ,118 datasheet, 74LVC823ABQ,118 pinout, 74LVC823ABQ,118 application, or 74LVC823ABQ,118 equivalent, this device serves as a bus-oriented 9-bit latch with precise timing control (tsu = 1.3 ns, th = 1.3 ns @ VCC = 3.3 V), thermal-enhanced DHVQFN24 packaging, and JEDEC-compliant operation across –40 °C to +125 °C.

Technical Context

The 74LVC823ABQ implements nine synchronous D-flip-flops sharing a common clock (CP) input and individually gated by CE and MR. Its 3-state output buffer (controlled by OE) operates independently of register state, enabling non-intrusive bus driving and hold functionality without affecting stored data.

Logic-level translation is enabled by 5 V tolerant I/Os - inputs accept 0–5.5 V regardless of VCC (1.2–3.6 V), and outputs tolerate up to 5.5 V when disabled - allowing safe interfacing between 3.3 V logic domains and legacy 5 V systems without external level shifters.

Key Specifications

Pinout & Package

DHVQFN24 (SOT815-1) package: 3.5 mm × 5.5 mm × 0.85 mm body, no leads, 24-terminal quad flat layout with exposed thermal pad (non-soldered or floating per datasheet guidance). Pin 1 index area located at top-left corner of top view.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC823APWR and 74LVC823AD,118, the 74LVC823ABQ,118 offers superior thermal dissipation (15.0 mW/K derating above 117 °C) and smallest footprint (3.5 × 5.5 mm), making it optimal for space-constrained, high-reliability applications like portable medical electronics and automotive ADAS sensor hubs.

Availability

74LVC823ABQ,118 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, test equipment digital I/O cards, and portable medical imaging systems requiring stable component supply across extended temperature ranges.

Supply support for 74LVC823ABQ,118 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

Nexperia is a global semiconductor expert delivering high-performance logic, discrete, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in automotive, industrial, and consumer electronics.

The 74LVC823A series belongs to Nexperia's advanced LVC logic family, engineered specifically for low-voltage, mixed-signal interfacing in thermally demanding environments where 5 V tolerance and precise timing synchronization are critical.

FAQ

Can 74LVC823ABQ,118 operate with VCC = 1.2 V while accepting 5 V inputs?

Yes. The device is fully specified for 5 V tolerant inputs at VCC = 1.2 V to 3.6 V. Input clamp diodes and internal protection circuitry allow VI up to 5.5 V regardless of supply voltage, enabling robust level translation without external components. This behavior is verified per JESD8-7A and confirmed in Table 5 of the datasheet.

What is the maximum clock frequency supported at VCC = 2.5 V?

At VCC = 2.5 V (within the 2.3 V–2.7 V range), the maximum clock frequency is 125 MHz (min) and 100 MHz (max over –40 °C to +125 °C). This is derived from Table 7, where fmax = 125 MHz (min) at VCC = 2.3 V–2.7 V and Tamb = –40 °C to +85 °C, derated to 100 MHz (max) at full temperature range.

Is the exposed thermal pad on pin 12 required to be soldered?

No. Per Figure 6 and footnote (1) in the datasheet, the exposed pad (pin 12) has no electrical or mechanical requirement to be soldered. If soldered, it must remain electrically floating or be connected to GND - never left as a floating conductor. Thermal performance validation assumes proper pad treatment per IPC-7351B guidelines.

How does OE assertion affect internal register state during continuous clocking?

Asserting OE (LOW) enables outputs but does not alter internal flip-flop states; deasserting OE (HIGH) places outputs in high-impedance without resetting or modifying stored data. This independence is explicitly stated in Section 1 ("Operation of the OE input does not affect the state of the flip-flops") and verified in Table 3's function table.