NXP Semiconductors 74HCT4040PW,112

Overview

74HCT4040PW,112 from Nexperia is a 12-stage asynchronous binary ripple counter IC with TTL-compatible inputs, operating from 4.5 V to 5.5 V, featuring a HIGH-to-LOW clock edge trigger, active-HIGH master reset (MR), and twelve buffered Q0–Q11 outputs. It delivers 72 MHz maximum clock frequency at VCC = 4.5 V and CL = 50 pF, and is rated for operation from –40 °C to +125 °C in TSSOP16 packaging. It is used in digital timing, frequency division, and control sequencing circuits.

For engineers reviewing the 74HCT4040PW,112 datasheet, 74HCT4040PW,112 pinout, 74HCT4040PW,112 application, or 74HCT4040PW,112 equivalent, this page provides verified functional identity, validated pin roles, confirmed thermal and timing specs, real-world application context, and cross-reference alternatives - all grounded in Nexperia's Rev. 8 (2024) product data sheet.

Technical Context

The 74HCT4040PW,112 implements a cascaded chain of 12 static toggle flip-flops, advancing only on the HIGH-to-LOW transition of CP. Its asynchronous MR input forces all Q outputs LOW independently of CP state, enabling immediate synchronous reset across all stages. Input clamp diodes allow safe interfacing with voltages exceeding VCC when used with current-limiting resistors.

It uses standard CMOS silicon with TTL-level input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V), ensuring compatibility with legacy 5 V logic families. Propagation delay from CP to Q0 is 19 ns (typ) at VCC = 4.5 V, while inter-stage delay (Qn to Qn+1) is 10 ns (typ), defining its ripple timing behavior in high-speed divide-by-N applications.

Key Specifications

Pinout & Package

TSSOP16 package (SOT403-1): 4.4 mm body width, 0.65 mm lead pitch, 16-terminal surface-mount outline optimized for high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit asynchronous counter applications.

Compared with 74HC4040PW,112 and SN74LV4040APWR, the 74HCT4040PW,112 uniquely bridges TTL and CMOS domains at 5 V, offering guaranteed noise immunity and legacy compatibility without sacrificing temperature range or package density.

Availability

74HCT4040PW,112 is available at Aetrix Electronics and suitable for frequency division, time delay generation, control sequencing, and LED multiplexing applications requiring stable component supply across industrial temperature ranges and high-volume production cycles.

Supply support for 74HCT4040PW,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 specializing in high-performance, energy-efficient logic, analog, and discrete components, with leadership in automotive-grade and industrial reliability standards.

The 74HCT4040 belongs to Nexperia's 74HCT logic family, engineered specifically for seamless integration into 5 V TTL-based digital systems while delivering CMOS power efficiency and robust ESD tolerance.

FAQ

What is the maximum clock frequency supported by the 74HCT4040PW,112?

The 74HCT4040PW,112 supports a maximum clock frequency of 72 MHz at VCC = 4.5 V and CL = 50 pF, as specified in Nexperia's Rev. 8 datasheet (Table 7). At VCC = 5.0 V with CL = 15 pF, it achieves 79 MHz. Performance degrades at higher temperatures or load capacitances, with fmax dropping to 20 MHz at +125 °C and 50 pF.

Can the 74HCT4040PW,112 be used with a 3.3 V supply?

No - the 74HCT4040PW,112 is not characterized or guaranteed for operation at 3.3 V. Its recommended operating range is strictly 4.5 V to 5.5 V (Table 5), and TTL input thresholds require ≥2.0 V VIH, which may not be reliably met from 3.3 V logic drivers. For 3.3 V systems, use SN74LV4040APWR or 74LVC4040.

How does the master reset (MR) behave relative to the clock input (CP)?

The MR input is asynchronous and active HIGH: asserting MR immediately forces all Q0–Q11 outputs LOW, regardless of CP state or edge timing. The reset takes effect within tPHL(MR→Qn) = 45 ns (typ) at VCC = 4.5 V (Table 7), and no clock edge is required - making it suitable for emergency system halt or power-up initialization.

Is the 74HCT4040PW,112 pin-compatible with other 74xx4040 variants?

Yes - all 74xx4040 variants (including 74HC4040PW, 74HCT4040D, and 74HCT4040BQ) share identical pinouts per package type. The TSSOP16 variant (74HCT4040PW,112) matches SOT403-1 pin mapping exactly with SO16 and DHVQFN16 versions, differing only in package mechanicals and thermal characteristics.