Nexperia USA Inc. 74HC590PW,112

Overview

74HC590PW,112 from Nexperia is an 8-bit binary counter with integrated storage register and 3-state outputs, used for synchronized data latching and ripple-cascaded counting in digital timing and control systems. It features independent counter clock (CPC) and register clock (CPR), master reset (MRC), count enable (CE), output enable (OE), and ripple carry output (RCO). Operates from 2.0 V to 6.0 V across –40 °C to +125 °C.

For engineers reviewing the 74HC590PW,112 datasheet, 74HC590PW,112 pinout, 74HC590PW,112 application, or 74HC590PW,112 equivalent, this device supports precise 8-bit counting with output registration, cascade-ready RCO signaling, and industrial-temperature 3-state bus interfacing - critical for synchronous logic design, frequency division, and address/data staging in embedded controllers and instrumentation.

Technical Context

The 74HC590 implements a dual-clock architecture: CPC advances the internal 8-bit binary counter on each rising edge, while CPR captures the current counter state into the parallel-output storage register. The RCO output asserts low when all eight counter bits are high (Q0–Q7 = 1), enabling direct cascading without external logic.

Its 3-state outputs (Q0–Q7) are controlled by OE (active-low), allowing shared-bus operation. Inputs include clamp diodes for overvoltage tolerance, and the MRC input asynchronously clears the counter (but not the register), supporting deterministic initialization in multi-stage counters.

Key Specifications

Pinout & Package

TSSOP16 package (SOT403-1): 4.4 mm body width, 16-pin thin shrink outline, surface-mount compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC4040PW,118 and SN74LV590APW, the 74HC590PW,112 uniquely delivers simultaneous high-speed counting, glitch-free registered output, and 3-state bus control - making it the only choice for applications requiring deterministic readout timing and multi-device cascading in industrial 5 V environments.

Availability

74HC590PW,112 is available at Aetrix Electronics and suitable for programmable logic controllers, digital panel meters, test equipment counters, and industrial timer modules requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for 74HC590PW,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, discrete, and MOSFET solutions for industrial, automotive, and consumer markets.

The 74HC590 belongs to Nexperia's HC logic family - engineered for robust performance in industrial automation and instrumentation, emphasizing noise immunity, wide voltage operation, and extended temperature reliability.

FAQ

What is the function of the RCO pin?

The RCO (Ripple Carry Output) is an active-low signal that goes low when the internal 8-bit counter reaches its maximum value (255, i.e., Q0–Q7 = 1). It is designed specifically for cascading multiple 74HC590 devices: connecting RCO of one stage to CE of the next enables synchronized multi-stage counting without external logic gates or timing constraints.

Can CPC and CPR be tied together?

Yes, CPC and CPR may be connected to the same clock source. When tied, the storage register always reflects the counter state from the previous clock cycle - i.e., the register output lags the counter by exactly one count. This configuration supports simple buffered counting but forfeits independent control of counting vs. latching timing.

How does MRC differ from resetting via CE and CPC?

MRC is an asynchronous, active-low master reset that immediately forces the counter to 00000000 regardless of clock or enable state. In contrast, disabling CE then pulsing CPC yields no count change but does not clear the counter. MRC ensures deterministic zero-initialization at power-up or fault recovery, independent of clock timing or enable conditions.

Is the 74HC590PW,112 suitable for 3.3 V-only systems?

Yes - the 74HC590PW,112 operates reliably from 2.0 V to 6.0 V, including nominal 3.3 V supply. At VCC = 3.3 V, typical propagation delay is ~22 ns and output drive remains ≥±24 mA, meeting most 3.3 V CMOS interface requirements. Ensure input thresholds (VIH ≈ 2.1 V, VIL ≈ 1.35 V at 3.3 V) align with driving logic levels.