Nexperia USA Inc. 74HCT393PW,118

Overview

74HCT393PW,118 from Nexperia is a dual 4-bit binary ripple counter IC with TTL-compatible inputs, asynchronous master reset per counter, and HIGH-to-LOW edge-triggered clocks. It operates from 4.5 V to 5.5 V, delivers propagation delays as low as 15 ns (VCC = 4.5 V, CL = 50 pF), and supports industrial temperature range (−40 °C to +125 °C) in TSSOP14 package. It is used for frequency division, timing control, and event counting in digital logic systems.

For engineers reviewing the 74HCT393PW,118 datasheet, 74HCT393PW,118 pinout, 74HCT393PW,118 application, or 74HCT393PW,118 equivalent, this device serves as a cost-effective, drop-in-capable dual counter for legacy TTL-interfaced designs requiring precise binary division by powers of two up to 2⁸ - especially where low static current (<160 μA at 125 °C), high noise immunity, and rail-to-rail output swing are critical.

Technical Context

The 74HCT393PW,118 implements two independent 4-stage ripple counters using cascaded D-type flip-flops, each advancing on the HIGH-to-LOW transition of its dedicated clock input (1CP or 2CP). Each counter features an active-HIGH asynchronous master reset (1MR/2MR) that forces all four outputs (nQ0–nQ3) LOW regardless of clock state.

Its TTL-level input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V) ensure compatibility with legacy 5 V logic families, while CMOS output stages deliver VOH ≥ 3.7 V and VOL ≤ 0.4 V under 4 mA load - enabling robust interfacing with both HCT and HC loads without level-shifting.

Key Specifications

Pinout & Package

TSSOP14 (SOT402-1) package: 14-lead plastic thin shrink small outline, 4.4 mm body width, 0.65 mm pitch, exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC393PW,118 and SN74LS393N, the 74HCT393PW,118 uniquely balances TTL input compatibility, industrial temperature resilience, and sub-100 μA quiescent current - making it the optimal choice for new 5 V embedded timing designs requiring long-term supply continuity and drop-in replaceability.

Availability

74HCT393PW,118 is available at Aetrix Electronics and suitable for motor control timing, legacy system clock division, industrial PLC input debouncing, and digital test equipment event counting requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for 74HCT393PW,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 delivering high-performance, reliable logic, analog, and discrete components with focus on efficiency, reliability, and sustainability.

The 74HCT393 belongs to Nexperia's industry-standard 74-series logic family, designed specifically for robust, pin-compatible replacement of legacy TTL and CMOS counters in industrial, automotive (non-safety), and consumer applications requiring proven timing accuracy and long-term supply stability.

FAQ

Can 74HCT393PW,118 operate at 3.3 V supply?

No. The 74HCT393PW,118 is specified only for 4.5 V to 5.5 V operation per its Recommended Operating Conditions table. At 3.3 V, input thresholds fall outside guaranteed TTL compatibility (VIH min = 2.0 V requires VCC ≥ 4.5 V for proper noise margin), and output drive degrades below specification. Use 74HC393PW,118 instead for 3.3 V systems.

What is the maximum fan-out to 74HCT inputs?

Each output can drive up to 10 standard 74HCT inputs. This is derived from the guaranteed IOH = −4.0 mA (VOH ≥ 3.7 V) and IIL = −0.04 mA per HCT input, yielding 4.0 mA ÷ 0.04 mA = 100, but derated to 10 for signal integrity and timing margin across temperature and voltage extremes.

Is the TSSOP14 package lead-free and RoHS compliant?

Yes. The 74HCT393PW,118 uses a lead-free, halogen-free, RoHS-compliant TSSOP14 (SOT402-1) package per Nexperia's product compliance documentation dated March 2024, with SnAgCu solder finish and JEDEC J-STD-020 moisture sensitivity level 1 (MSL1).

How does ripple propagation affect cascaded counters?

Ripple propagation causes cumulative delay: nQ0 → nQ1 adds ~6 ns (typ), nQ1 → nQ2 adds another ~6 ns, etc. So nQ3 lags nCP by ~24 ns (typ) at VCC = 4.5 V. This limits maximum usable clock frequency in synchronous cascades - e.g., two 74HCT393s cascaded for 8-bit count require fCLK ≤ 22 MHz to meet setup time at the second device's CP input.