Renesas 74HC564FPEL-E

Overview

74HC564FPEL-E from Renesas Electronics is an octal D-type flip-flop with inverting 3-state outputs, used for data latching and bus isolation in digital logic systems. It operates across 2–6 V supply, delivers 13 ns typical clock-to-output propagation delay (CL = 50 pF), supports –40°C to +85°C industrial temperature range, and features output enable control for high-impedance state management in shared-bus applications.

For engineers reviewing the 74HC564FPEL-E datasheet, 74HC564FPEL-E pinout, 74HC564FPEL-E application, or 74HC564FPEL-E equivalent, key selection criteria include its inverting Q-bar outputs, SOP-20 JEITA package, 35 MHz max clock frequency at 6 V, ±7.8 mA output drive, and compatibility with 74HCT-level input thresholds.

Technical Context

This device implements eight independent positive-edge-triggered D flip-flops, each with complementary Q and Q̅ outputs. Its output control (OC) input enables synchronous three-state operation-asserting OC high forces all Q outputs into high-impedance regardless of clock or data states.

The logic design follows standard HC-series CMOS architecture with Schmitt-trigger input hysteresis absent; setup/hold times are specified at 5 ns (tsu) and 5 ns (th) minimum at VCC = 6 V, and output disable time (tLZ/tHZ) is 26 ns max under same conditions.

Key Specifications

Pinout & Package

SOP-20 package (JEITA PRSP0020DD-B, FP-20DAV), 12.6 mm × 7.5 mm body, 1.27 mm pitch, Ni/Pd/Au-plated leads, 0.31 g typical mass.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal D-type flip-flop with 3-state output applications.

Compared with 74HC564FPEL-E, SN74HC574PWR eliminates inversion but requires redesign of downstream logic polarity handling, while 74HCT574PW trades low-voltage operation for stronger noise immunity-neither is pin-compatible due to differing output logic sense or input threshold behavior.

Availability

74HC564FPEL-E is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy bus interface adapters, digital test equipment pattern generators, and automated test fixture control requiring stable component supply and long-term production continuity.

Supply support for 74HC564FPEL-E 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

Renesas Electronics Corporation is a Japanese semiconductor manufacturer specializing in microcontrollers, analog and power devices, and logic ICs for industrial, automotive, and infrastructure markets.

The 74HC564FPEL-E belongs to Renesas' legacy HC-series logic portfolio, designed for general-purpose digital signal routing, latching, and bus buffering in cost-sensitive industrial control and instrumentation systems.

FAQ

What is the output polarity configuration of the 74HC564FPEL-E?

The 74HC564FPEL-E provides inverting outputs (Q̅), meaning each Q output reflects the logical complement of its corresponding D input after a positive clock edge. This distinguishes it from the non-inverting HD74HC574 variant. The 74HC564FPEL-E maintains this behavior across its full operating voltage range (2–6 V) and temperature range (–40°C to +85°C), and the output control (OC) pin overrides all output states to high-impedance when asserted high.

Does the 74HC564FPEL-E support 3.3 V operation?

Yes, the 74HC564FPEL-E fully supports 3.3 V operation within its specified 2.0–6.0 V supply range. At VCC = 3.3 V, it meets all AC and DC specifications including VIH (minimum 2.1 V), VIL (maximum 1.2 V), tPLH/tPHL (≤30 ns max), and IOH/IOL (±6 mA). This makes the 74HC564FPEL-E suitable for mixed-voltage systems interfacing 3.3 V microcontrollers with 5 V peripherals without level-shifting circuitry.

What is the function of Pin 1 (OC) on the 74HC564FPEL-E?

Pin 1 on the 74HC564FPEL-E is the Output Control (OC) terminal, an active-high signal that places all eight Q̅ outputs into a high-impedance (three-state) condition when driven high, regardless of clock or data states. When OC is low, the device operates normally-latching D inputs to Q̅ outputs on each positive clock edge. This feature enables bus sharing and prevents signal contention in multi-driver systems, and is electrically compatible with standard CMOS logic levels across the full VCC range.

Is the 74HC564FPEL-E RoHS compliant?

Yes, the 74HC564FPEL-E is RoHS compliant, as confirmed by Renesas Electronics' environmental compliance documentation and material declarations. The device uses lead-free Ni/Pd/Au plating on its SOP-20 leads and adheres to EU Directive 2011/65/EU restrictions on hazardous substances. No exemptions apply, and the 74HC564FPEL-E is rated for "Standard" quality grade, intended for industrial, office, and communications equipment per Renesas' product classification policy.

How does the 74HC564FPEL-E differ from the HD74HC574?

The 74HC564FPEL-E differs from the HD74HC574 solely in output polarity: the 74HC564FPEL-E delivers inverted outputs (Q̅), whereas the HD74HC574 provides true outputs (Q). All other parameters-including pinout, timing, supply range, temperature rating, and 3-state control behavior-are identical. This functional distinction is documented in Renesas' HD74HC564/HD74HC574 datasheet Rev. 2.00, and means the 74HC564FPEL-E cannot be substituted for the HD74HC574 without verifying downstream logic compatibility with inverted data.