Renesas 74HC564FP-E

Overview

74HC564FP-E from Renesas Electronics is an octal D-type flip-flop with inverting 3-state outputs, designed for data latching and bus interface isolation in synchronous digital systems. It operates across 2–6 V supply, delivers 13 ns typical clock-to-output propagation delay (CL = 50 pF), supports ±7.8 mA output drive, and functions over –40°C to +85°C. It is used in microcontroller peripheral interfacing and address/data bus buffering.

For engineers reviewing the 74HC564FP-E datasheet, 74HC564FP-E pinout, 74HC564FP-E application, or 74HC564FP-E equivalent, key selection criteria include its inverting Q-bar outputs, active-high output control (OE), positive-edge clock triggering, and SOP-20 JEITA package compatibility with standard PCB footprints.

Technical Context

The 74HC564FP-E implements eight independent D-type flip-flops, each triggered on the rising edge of the shared clock (CK) input. Data present at D inputs meeting setup/hold timing constraints (5 ns min setup, 5 ns min hold at VCC = 6 V) is latched into storage elements and appears inverted at corresponding Q outputs.

Output enable (OE) is an active-high control that places all eight Q outputs in high-impedance state regardless of clock or data states. This enables bidirectional bus sharing without external gating logic, supporting tri-state bus architectures in embedded controllers and FPGA I/O expansion.

Key Specifications

Pinout & Package

SOP-20 package (JEITA PRSP0020DD-B, FP-20DAV), 12.6 mm × 7.5 mm body, 1.27 mm pitch, gull-wing leads, Ni/Pd/Au plating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HC574PWR and 74HCT564PW, the 74HC564FP-E provides guaranteed inverting outputs in a JEITA-standard SOP-20 package with lowest quiescent current (4 µA), making it optimal for power-constrained industrial bus-hold applications requiring complemented data paths.

Availability

74HC564FP-E is available at Aetrix Electronics and suitable for microcontroller bus interface, FPGA I/O expansion, digital test equipment, and industrial PLC modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for 74HC564FP-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 logic solutions for industrial, automotive, and infrastructure markets.

The HD74HC564 product line delivers high-speed, low-power octal D-type flip-flops with 3-state outputs, designed specifically for bus-oriented digital systems requiring precise edge-triggered latching and output isolation.

FAQ

What is the output polarity of the 74HC564FP-E?

The 74HC564FP-E features inverting outputs (Q-bar). Each Q output presents the logical complement of its corresponding D input after clocking. This distinguishes it from the HD74HC574, which provides true (non-inverting) outputs. The 74HC564FP-E's inverting behavior is fixed and cannot be disabled or configured via pins or internal registers.

Does the 74HC564FP-E support 3.3 V operation?

Yes, the 74HC564FP-E supports 3.3 V operation within its specified 2.0–6.0 V supply range. At VCC = 3.3 V, it maintains valid VIH (≥2.1 V) and VIL (≤1.2 V) thresholds, 13 ns typical propagation delay, and ±6 mA output drive - enabling direct integration with 3.3 V microcontrollers and FPGAs without level translation.

What is the function of Pin 1 (OE) on the 74HC564FP-E?

Pin 1 is the Output Enable (OE) terminal, active-high. When OE = HIGH, all eight Q outputs enter high-impedance (Hi-Z) state regardless of clock or data states. When OE = LOW, outputs reflect latched Q-bar values synchronized to the CK rising edge. This enables dynamic bus sharing and prevents contention in multi-driver systems.

Can the 74HC564FP-E be used as a replacement for the 74HC574?

No - the 74HC564FP-E is not a functional replacement for the 74HC574 due to inverted output polarity. While both share identical pinout, timing, and electrical specs, the 74HC564FP-E outputs Q-bar whereas the 74HC574 outputs Q. Substituting one for the other will invert all data bits unless compensated by upstream/downstream logic.

What is the maximum clock frequency supported by the 74HC564FP-E?

The 74HC564FP-E supports a maximum clock frequency of 28 MHz over its full operating temperature range (–40°C to +85°C) at VCC = 4.5 V, per switching characteristics table. At VCC = 6.0 V and Ta = 25°C, fmax reaches 35 MHz. System-level timing must account for setup/hold (5 ns min each) and board-level signal integrity.