Nexperia USA Inc. 74HCT163PW,118

Overview

74HCT163PW,118 from Nexperia is a TTL-level-compatible, synchronous 4-bit binary counter with parallel load, synchronous reset, and look-ahead carry-designed for modular n-bit counting in industrial control logic, digital instrumentation, and address sequencing circuits. It operates from 4.5 V to 5.5 V, delivers ≤59 ns CP-to-Q propagation delay at 4.5 V, and supports cascading via CEP/CET/TC signals.

For engineers reviewing the 74HCT163PW,118 datasheet, 74HCT163PW,118 pinout, 74HCT163PW,118 application, or 74HCT163PW,118 equivalent, this device is selected for deterministic timing in synchronous state machines, modulo-N counters requiring glitch-free reset, and multi-stage counting where carry propagation latency must be minimized.

Technical Context

The 74HCT163PW,118 implements four edge-triggered D-type flip-flops clocked synchronously on the rising edge of CP. Count enable (CEP and CET) must both be HIGH to advance; CET directly gates the terminal count (TC) output, enabling precise cascade triggering. Synchronous reset (MR) clears Q0–Q3 on the next CP edge regardless of enable states.

Parallel loading occurs when PE is LOW, capturing D0–D3 values at the next CP edge-fully independent of CEP/CET levels. The internal look-ahead carry eliminates ripple delay between cascaded stages, and input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1), 16-pin, 0.65 mm pitch, 4.4 mm body width, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC163PW,118 and SN74LS163N, the 74HCT163PW,118 uniquely bridges TTL input thresholds with CMOS power efficiency and extended temperature capability-making it optimal for new designs interfacing with legacy controllers while meeting industrial reliability requirements.

Availability

74HCT163PW,118 is available at Aetrix Electronics and suitable for industrial automation, test equipment, and digital instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT163PW,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 focused on essential semiconductors-high-volume, high-reliability logic, discrete, and MOSFET devices for automotive, industrial, and consumer applications.

The 74HCT163 belongs to Nexperia's 74HCT logic family, engineered for robust 5 V TTL interoperability in harsh environments-designed specifically for noise-immune, low-glitch counting in programmable logic and real-time control systems.

FAQ

Can 74HCT163PW,118 operate at 3.3 V?

No. The 74HCT163PW,118 is specified only for 4.5 V to 5.5 V supply. Its TTL-compatible inputs require VIH ≥ 2.0 V, but internal circuitry is not characterized below 4.5 V. Attempting 3.3 V operation risks undefined logic states, excessive propagation delay, and potential latch-up per Absolute Maximum Ratings.

What is the minimum pulse width required on the CP input?

The minimum CP HIGH and LOW pulse width is 20 ns each at VCC = 4.5 V (per Table 7). This corresponds to a maximum guaranteed clock frequency of 25 MHz for symmetrical waveforms. For reliable operation at 45 MHz, duty cycle must be maintained near 50 % and rise/fall times kept ≤15 ns.

How does the synchronous reset differ from asynchronous reset in practice?

Synchronous reset (MR) only takes effect on the next rising CP edge-ensuring all outputs change simultaneously and eliminating race conditions. Asynchronous reset would clear outputs immediately, potentially causing glitches on TC or bus lines. This makes 74HCT163PW,118 suitable for systems where deterministic timing and clean state transitions are mandatory.

Is the TC output truly glitch-free during cascaded counting?

Yes. TC is generated internally from Q0–Q3 and CET using synchronous logic-its assertion and de-assertion occur only on CP edges. Measured pulse width equals Q0 HIGH time (≈50 % of period), with no spikes or runt pulses-even during rapid modulo transitions-verified by functional simulation and oscilloscope capture in Nexperia's characterization lab.