Nexperia USA Inc. 74HC193PW,118

Overview

74HC193PW,118 from Nexperia is a presettable synchronous 4-bit binary up/down counter in TSSOP16 package, featuring separate CPU and CPD clock inputs, asynchronous master reset (MR), asynchronous parallel load (PL), and active-low terminal count outputs (TCU/TCD). It operates from 2.0 V to 6.0 V across –40 °C to +125 °C and is used in digital timing control, programmable logic sequencers, and multistage counter cascades.

For engineers reviewing the 74HC193PW,118 datasheet, 74HC193PW,118 pinout, 74HC193PW,118 application, or 74HC193PW,118 equivalent, key selection considerations include its dual-clock edge-triggered counting behavior, guaranteed single-clock-active constraint, asynchronous load/reset timing margins, and TCU/TCD waveform duplication for ripple-cascaded stage synchronization.

Technical Context

The device implements four edge-triggered D-type flip-flops with synchronous up/down counting logic gated by CPU and CPD inputs - only one may be HIGH at any time to ensure deterministic state transitions. Count direction is determined solely by which clock input receives the LOW-to-HIGH transition while the other remains HIGH.

Terminal count outputs TCU and TCD are active-LOW and replicate the respective clock waveform edges at overflow (15→0) and underflow (0→15), enabling direct connection as clock inputs to higher-order stages without external logic. Asynchronous PL and MR override all clock activity and force immediate data loading or zero-state reset regardless of clock conditions.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1), 16-pin, body width 4.4 mm, lead pitch 0.65 mm, rated for –40 °C to +125 °C operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4-bit synchronous up/down counter applications.

Compared with 74HCT193PW,118, the 74HC193PW,118 provides broader supply range and lower static current but requires CMOS-level drive; versus SN74LS193N, it delivers superior temperature range, power efficiency, and voltage scalability at the cost of TTL input compatibility.

Availability

74HC193PW,118 is available at Aetrix Electronics and suitable for industrial automation controllers, automotive body electronics, and test instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC193PW,118 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 specializing in high-volume, high-reliability logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74HC193 belongs to Nexperia's HC logic family - designed for low-power, wide-supply, and high-noise-immunity applications in harsh environments where deterministic timing and long-term stability are critical.

FAQ

What is the minimum pulse width required on CPU or CPD for reliable counting?

The minimum HIGH or LOW pulse width is 17 ns at VCC = 6.0 V (21 ns at VCC = 4.5 V). This ensures proper internal flip-flop triggering and avoids metastability. Pulses narrower than specification risk missed counts or undefined output states, especially under temperature extremes.

Can both CPU and CPD be held HIGH simultaneously?

No - the datasheet explicitly states that only one clock input may be held HIGH at any time to guarantee predictable behavior. Holding both HIGH violates functional constraints and may result in indeterminate counting or failure to advance state, particularly during transitions.

How does the TCU output behave during terminal count?

TCU goes LOW on the LOW-to-HIGH transition of CPU when the counter reaches 15 (1111) and remains LOW until CPU returns HIGH - effectively duplicating the CPU waveform. This allows TCU to directly drive the CPU input of the next-stage counter in cascaded configurations.

Is the parallel load operation truly asynchronous with respect to clock inputs?

Yes - when PL is pulled LOW, data present on D0–D3 appears on Q0–Q3 regardless of CPU, CPD, or MR states. This occurs within tPLH = 20 ns (typ) at VCC = 6.0 V and overrides all synchronous clock activity, making it suitable for immediate state injection in fault recovery or initialization.