NXP Semiconductors 74HC563D,652

Overview

74HC563D,652 from Nexperia (formerly Philips Semiconductors) is an octal D-type transparent latch with inverting 3-state outputs, designed for bus-oriented digital systems. It features common latch enable (LE) and output enable (OE) controls, 8 independent data inputs (D0–D7), and operates across 2.0–6.0 V supply range with typical propagation delay of 14 ns at 5 V. It is used in microprocessor data bus interfacing where output inversion and high-impedance control are required.

For engineers reviewing the 74HC563D,652 datasheet, 74HC563D,652 pinout, 74HC563D,652 application, or 74HC563D,652 equivalent, key selection criteria include inverting 3-state output behavior, LE/OE logic polarity, propagation delay vs. supply voltage, bus driver output capability, and compatibility with HC-level input thresholds.

Technical Context

The 74HC563D,652 implements eight independent transparent latches with synchronous storage triggered by a HIGH-to-LOW transition on LE. Its outputs invert latch contents and enter high-impedance state when OE is HIGH - a functionally distinct variant from the non-inverting 74HC573. The device uses Si-gate CMOS technology and meets JEDEC standard No. 7A.

It supports dual-voltage operation (2.0–6.0 V), exhibits input capacitance of 3.5 pF per pin, and delivers bus-driver strength with MSI-level integration density. Propagation delays scale predictably with VCC, and timing parameters (e.g., t_su = 10 ns min at 4.5 V) are specified under defined load (CL = 50 pF) and edge rate (tr/tf = 6 ns) conditions.

Key Specifications

Pinout & Package

74HC563D,652 is housed in a 20-pin SOIC (Small Outline Integrated Circuit) package with 0.300-inch body width and standard 1.27 mm pitch, compliant with JEDEC MS-013.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal transparent latch applications.

Compared with 74HC563D,652, the 74HC573D,652 offers identical timing and layout compatibility but requires external inversion logic for inverted-bus use cases, whereas SN74HCT573N trades HC-level voltage flexibility for robust TTL input compatibility - making 74HC563D,652 optimal for pure CMOS 3.3/5 V bus isolation with built-in inversion.

Availability

74HC563D,652 is available at Aetrix Electronics and suitable for microprocessor bus interface, industrial I/O expansion, test equipment signal capture, and digital logic analyzer front-end designs requiring stable component supply and long-term sourcing continuity.

Supply support for 74HC563D,652 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, reliable discrete, logic, and MOSFET solutions, spun off from Philips in 2017 with deep heritage in logic IC design.

The 74HC563D,652 belongs to Nexperia's 74HC logic family - engineered for low-power, high-noise-immunity digital interfacing in industrial, automotive, and computing applications where pin compatibility and predictable timing are critical.

FAQ

What is the logic polarity of the outputs on the 74HC563D,652?

The 74HC563D,652 features inverting 3-state outputs: when LE is LOW and OE is LOW, Q0–Q7 present the logical complement of the stored D0–D7 values. This distinguishes it from the non-inverting 74HC573 and eliminates need for external inverters in bus-inversion schemes. The 74HC563D,652 maintains this behavior across its full 2.0–6.0 V supply range.

Does the 74HC563D,652 support 3.3 V operation?

Yes, the 74HC563D,652 is fully specified for operation from 2.0 V to 6.0 V, including 3.3 V nominal systems. At VCC = 3.3 V, propagation delay increases to ~25 ns (max) and output drive remains sufficient for CMOS loads. Its HC-family input thresholds (VIH ≈ 0.7×VCC, VIL ≈ 0.3×VCC) ensure reliable interfacing with 3.3 V microcontrollers. The 74HC563D,652 retains full functionality without level-shifting.

How does the latch enable (LE) and output enable (OE) interact in the 74HC563D,652?

In the 74HC563D,652, LE controls data capture (HIGH = transparent, LOW = latch), while OE independently controls output state (LOW = active/inverted, HIGH = high-Z). OE has no effect on internal latch states - latched data persists regardless of OE level. This decoupling allows data to be held while outputs are tri-stated for bus arbitration. The 74HC563D,652 thus supports simultaneous latching and bus release in multi-master systems.

What is the maximum clock frequency or data rate supported by the 74HC563D,652?

The 74HC563D,652 is not a clocked register but a transparent latch, so it has no clock input. Its effective data rate depends on LE pulse width and propagation delay: minimum LE HIGH pulse width is 14 ns (typ) at 5 V, supporting burst rates up to ~70 MHz under ideal conditions. Real-world throughput is constrained by setup/hold times (tsu = 10 ns min, th = 5 ns min at 4.5 V) and bus settling. The 74HC563D,652 is optimized for asynchronous bus handshaking, not continuous streaming.

Is the 74HC563D,652 pin-compatible with other 74-series latches?

Yes, the 74HC563D,652 shares the same 20-pin SOIC footprint and pin assignments as 74HC573D,652 and 74HCT573N, making it a direct physical replacement. However, output polarity differs: 74HC563D,652 outputs are inverted, while 74HC573D,652 outputs are non-inverted. Swapping them requires logic adjustment. The 74HC563D,652 maintains identical LE/OE timing and DC characteristics otherwise.