Renesas 74HC73P-E

Overview

74HC73P-E from Renesas Electronics is a dual J-K flip-flop with independent asynchronous clear, designed for synchronous logic control in digital systems. It operates across 2–6 V supply, delivers 18 ns typical propagation delay (CL = 50 pF), supports –40°C to +85°C industrial temperature range, and features low quiescent current (2 µA max at 25°C). It is used in clocked state machines, counters, and register control circuits.

For engineers reviewing the 74HC73P-E datasheet, 74HC73P-E pinout, 74HC73P-E application, or 74HC73P-E equivalent, key selection criteria include negative-edge-triggered clocking, independent clear per section, fanout of 10 LSTTL loads, wide VCC tolerance, and DIP-14 package compatibility with legacy TTL/CMOS board layouts.

Technical Context

The 74HC73P-E implements two identical, independently controlled J-K flip-flops in a single 14-pin PDIP package. Each section features separate J, K, clock (CK), and active-low clear (CLR) inputs, plus complementary Q and Q̅ outputs. The device is edge-triggered on the falling edge of CK and resets asynchronously via low-level CLR - both functions operate without dependency on clock timing.

Its high-speed HC logic family ensures compatibility with 74HCT and 74LS interfaces while maintaining CMOS power efficiency. Input thresholds scale with VCC (VIH ≥ 70% VCC, VIL ≤ 30% VCC), and output drive capability supports ±25 mA per pin under absolute maximum conditions, enabling direct interfacing with multiple LSTTL loads.

Key Specifications

Pinout & Package

74HC73P-E is housed in a 14-pin plastic dual in-line package (PDIP), designated PRDP0014AB-B (JEDEC MS-001), with 2.54 mm lead pitch and Ni/Pd/Au plating. Package dimensions: 19.2 mm × 6.3 mm × 3.3 mm (L × W × H), mass ≈ 0.97 g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual J-K flip-flop applications.

Compared with SN74HC73N and CD74HC73E, the 74HC73P-E offers Renesas-specific quality grading (Standard grade), traceable lot history for industrial OEMs, and documented compatibility with legacy NEC-era designs - making it optimal for long-lifecycle maintenance of established equipment.

Availability

74HC73P-E is available at Aetrix Electronics and suitable for industrial control panels, test instrumentation, and legacy system repairs requiring stable component supply and long-term obsolescence management.

Supply support for 74HC73P-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 global semiconductor leader specializing in microcontrollers, analog, power, and timing solutions for automotive, industrial, and IoT applications.

The 74HC73P-E belongs to Renesas' legacy HC logic product line, designed specifically for pin-compatible upgrades of 74LS and 74F logic in industrial and computing equipment requiring low power and broad voltage operation.

FAQ

What is the clocking behavior of the 74HC73P-E?

The 74HC73P-E is a negative-edge-triggered device: each flip-flop changes state only on the falling edge of its respective clock input (1CK or 2CK). This ensures deterministic sampling of J and K inputs at a precise point in the clock cycle, minimizing timing uncertainty in synchronous logic designs. The 74HC73P-E does not respond to rising edges or level-sensitive transitions - its operation is strictly edge-controlled.

Does the 74HC73P-E support 3.3 V operation?

Yes, the 74HC73P-E fully supports 3.3 V operation within its specified 2.0 V to 6.0 V supply range. At VCC = 3.3 V, it maintains guaranteed VIH ≥ 2.31 V and VIL ≤ 0.99 V, ensuring robust noise margins against typical 3.3 V system noise. Propagation delay increases slightly (~22 ns typ), but remains well within standard 74HC timing budgets for most interface applications.

Can the 74HC73P-E replace a 74LS73 in an existing design?

Yes, the 74HC73P-E is a functional and pin-compatible replacement for the 74LS73, offering identical pinout, J-K functionality, and active-low clear. Key advantages include lower power consumption (µA vs. mA quiescent current), wider supply range (2–6 V vs. 4.75–5.25 V), and improved noise immunity. No PCB changes are required, though timing analysis should confirm setup/hold compliance at higher frequencies enabled by HC speed.

What is the maximum clock frequency supported by the 74HC73P-E?

The 74HC73P-E supports a maximum clock frequency of 28 MHz over its full operating temperature range (–40°C to +85°C) and up to 35 MHz at 25°C (VCC = 6.0 V, CL = 50 pF). This rating derives directly from its 24–33 ns propagation delay (tPLH/tPHL) and 17 ns minimum pulse width (tw) specifications - values confirmed in Renesas HD74HC73 Rev.2.00 datasheet Table "Switching Characteristics".

Is the 74HC73P-E RoHS compliant?

Yes, the 74HC73P-E is RoHS compliant per EU Directive 2011/65/EU. Renesas confirms compliance in its environmental documentation, and the device uses Ni/Pd/Au lead plating with no lead in solderable terminations. Material declarations and test reports are available through Renesas' official compliance portal upon request with full part number 74HC73P-E.