NXP Semiconductors 74HC564D,653

Overview

74HC564D,653 from NXP Semiconductors (formerly Philips) is an octal D-type flip-flop with positive-edge clock triggering, inverting 3-state outputs, and common output enable (OE) and clock (CP) inputs. It operates across −40 °C to +125 °C, supports 5 V supply, delivers 127 MHz max clock frequency, and features 15 ns propagation delay (CP to Qn) at VCC = 5 V and CL = 15 pF. It is used in bus-oriented digital systems for data latching and controlled output isolation.

For engineers reviewing the 74HC564D,653 datasheet, 74HC564D,653 pinout, 74HC564D,653 application, or 74HC564D,653 equivalent, key selection criteria include its inverting 3-state output architecture, JEDEC 7A compliance, SO20 package footprint, −40 °C to +125 °C temperature rating, and functional distinction from non-inverting variants like 74HC574.

Technical Context

The 74HC564D,653 implements eight independent D-type latches triggered on the LOW-to-HIGH transition of CP, with setup/hold timing validated down to 2 ns (VCC = 4.5 V). Its OE input controls all eight outputs simultaneously, placing them in high-impedance state when HIGH without affecting internal register states.

It uses Si-gate CMOS technology, ensuring compatibility with LSTTL logic levels while delivering low static current (≤160 µA at VCC = 6 V, −40 °C to +125 °C) and dynamic power dissipation governed by CPD = 27 pF per flip-flop. ESD protection exceeds 2000 V HBM and 200 V MM.

Key Specifications

Pinout & Package

74HC564D,653 is housed in a plastic small outline package (SO20), 20-pin, 7.5 mm body width (SOT163-1), surface-mount compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC564D,653, the 74HC574D,653 eliminates inversion but requires external logic if signal polarity must be flipped, while the SN74HC574PWR trades extended temperature capability for broader distributor availability and lower unit cost in non-extended-temp designs.

Availability

74HC564D,653 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, and test equipment digital pattern generation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC564D,653 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

NXP Semiconductors, formerly Philips Semiconductors, is a global leader in high-performance analog and logic ICs, with expertise in automotive, industrial, and secure connectivity solutions.

The 74HC564D,653 belongs to NXP's 74HC logic family, designed for robust, pin-compatible replacements of legacy TTL devices in noise-sensitive, wide-temperature, and bus-critical applications.

FAQ

What is the key functional difference between 74HC564D,653 and 74HC574D,653?

The 74HC564D,653 provides inverting 3-state outputs (Qn = NOT(Dn)), whereas the 74HC574D,653 provides non-inverting outputs (Qn = Dn). Both share identical pinout, timing, supply range, and temperature rating. This inversion eliminates need for external inverters in designs requiring active-low bus signaling, making 74HC564D,653 optimal for interfacing with legacy peripherals or active-low drivers.

Does 74HC564D,653 support 3.3 V operation?

Yes, 74HC564D,653 is fully specified for 3.3 V operation (VCC = 2.0–6.0 V). At VCC = 3.3 V, it maintains valid VIH/VIL thresholds, delivers ~35 MHz max clock frequency, and exhibits ~25 ns typical propagation delay. Input and output voltage levels remain compatible with 3.3 V LVTTL and LVCMOS interfaces without level shifters.

What is the maximum capacitive load 74HC564D,653 can drive reliably?

74HC564D,653 is characterized up to 50 pF load capacitance in dynamic tests. With CL = 50 pF and VCC = 4.5 V, it achieves 12 ns typical output transition time and 27 ns max propagation delay. For loads exceeding 50 pF, add series termination or buffer stages to maintain signal integrity and timing margins.

How does the OE pin behave during power-up or brown-out conditions?

The OE pin is not internally pulled - it must be actively driven LOW after VCC stabilizes to enable outputs. During power-up, OE should be held HIGH (via external pull-up) until supply reaches valid operating range (≥2.0 V) to prevent undefined output states. Internal register contents are retained during brief brown-outs if VCC stays above 1.5 V.

Is 74HC564D,653 RoHS compliant and halogen-free?

Yes, 74HC564D,653 (SOT163-1 package) meets RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. The device carries the "HF" marking on reel labels and datasheet revision history confirms compliance effective from Rev. 03 (2004), with full material declarations available upon request.