Nexperia USA Inc. 74HC590D,112

Overview

74HC590D,112 from Nexperia is an 8-bit binary counter IC with integrated output register and 3-state outputs, designed for synchronous digital counting and buffered data latching in industrial control logic and instrumentation systems. It features independent counter clock (CPC) and register clock (CPR) inputs, master reset (MRC), count enable (CE), and ripple carry output (RCO) for cascading. Operating from 2.0 V to 6.0 V, it supports -40 °C to +125 °C ambient range.

For engineers reviewing the 74HC590D,112 datasheet, 74HC590D,112 pinout, 74HC590D,112 application, or 74HC590D,112 equivalent, this device is selected for precise 8-bit counting with isolated register staging, low-power CMOS operation, and robust 3-state bus interfacing in deterministic timing chains - especially where ripple-carry chaining and glitch-free output registration are required.

Technical Context

The 74HC590D implements a dual-clock architecture: CPC triggers the 8-bit binary counter, while CPR captures its state into an independent 8-bit storage register - enabling non-overlapping update cycles and eliminating race conditions during readout. The RCO output asserts low when all eight counter bits are high (Q0–Q7 = 1), supporting synchronous cascading without external logic.

Its 3-state outputs (Q0–Q7) are controlled by active-low OE, allowing direct connection to shared data buses. Inputs include clamp diodes for overvoltage tolerance, and internal circuitry prevents spurious clocking due to CE glitches - ensuring deterministic state transitions under noisy conditions.

Key Specifications

Pinout & Package

74HC590D,112 is housed in a 16-lead SO16 (SOT109-1) plastic small outline package, 3.9 mm body width, with gull-wing leads and standard JEDEC MS-012 footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit counter with output register applications.

Compared with 74HC4040D,112, the 74HC590D,112 provides deterministic register capture and bus isolation; compared with SN74LV8154IPW, it offers broader voltage tolerance and direct 5 V compatibility but less integration and lower drive capability.

Availability

74HC590D,112 is available at Aetrix Electronics and suitable for industrial PLC modules, motor encoder interfaces, digital panel meters, and test equipment event timers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC590D,112 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 focused on high-volume, high-reliability logic, analog, and discrete components - serving automotive, industrial, and consumer markets with scalable manufacturing and rigorous quality standards.

The 74HC590 belongs to Nexperia's HC-series high-speed CMOS logic family, engineered for low-power, noise-immune digital sequencing in industrial automation, instrumentation, and control systems where timing determinism and thermal resilience are critical.

FAQ

What is the function of the RCO pin?

The RCO (Ripple Carry Output) is an active-low signal that asserts when the 8-bit counter reaches its maximum value (255). It is used to cascade multiple 74HC590D devices by connecting RCO of one stage to the CE input of the next, enabling seamless expansion to 16-bit or wider counting without external logic.

Can CPC and CPR be tied together?

Yes, CPC and CPR may be connected to the same clock source, but doing so causes the register to always reflect the counter state from the previous clock cycle - i.e., the register output lags the counter by one count. This configuration is valid but eliminates independent staging capability.

Does the 74HC590D,112 support hot insertion?

No - the 74HC590D,112 lacks hot-swap protection circuitry. Its inputs do not tolerate voltage on VCC before power-up, and applying signals to pins while unpowered may exceed absolute maximum ratings. Power sequencing must follow VCC-first, signal-later order.

How does the master reset (MRC) affect the output register?

MRC asynchronously clears only the 8-bit binary counter to zero; it has no effect on the contents of the output register or the Q0–Q7 outputs. The register retains its last latched value until updated by a CPR clock edge - preserving readout integrity during counter reset.