Nexperia USA Inc. 74HCT4040PW-Q100J

Overview

74HCT4040PW-Q100 from Nexperia is an AEC-Q100 Grade 1 qualified 12-stage binary ripple counter with asynchronous master reset (MR), clock input (CP) triggering on HIGH-to-LOW transitions, and twelve buffered Q0–Q11 outputs. It operates from 4.5 V to 5.5 V across –40 °C to +125 °C, delivers ≤60 ns CP-to-Q0 propagation delay at 4.5 V, and supports automotive timing, frequency division, and control sequencing.

For engineers reviewing the 74HCT4040PW-Q100 datasheet, 74HCT4040PW-Q100 pinout, 74HCT4040PW-Q100 application, or 74HCT4040PW-Q100 equivalent, this device serves as a TTL-level–compatible, high-noise-immunity ripple counter for automotive clock tree partitioning, engine control timing delays, and body electronics state counting where latch-up immunity (>100 mA) and HBM ESD robustness (>2000 V) are required.

Technical Context

This device implements a cascaded chain of twelve static toggle flip-flops, each advancing only upon the falling edge of the preceding stage's output-resulting in inherent ripple propagation delay between Qn and Qn+1. Its asynchronous MR input forces all outputs LOW independently of CP state, enabling deterministic reset without clock synchronization.

The 74HCT variant features TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V), CMOS output drive (±4 mA), and input clamp diodes permitting safe interfacing to voltages exceeding VCC when used with current-limiting resistors.

Key Specifications

Pinout & Package

TSSOP16 package (SOT403-1): 4.4 mm body width, 0.65 mm lead pitch, 16-terminal surface-mount plastic thin shrink small outline package with exposed pad option (not applicable to PW variant); moisture sensitivity level MSL3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-stage binary ripple counter applications.

Compared with 74HC4040PW-Q100 and SN74LV4040APWR, the 74HCT4040PW-Q100 uniquely balances automotive qualification, TTL compatibility, and ripple-counter-specific timing predictability - making it the only choice for safety-critical engine control timing where input threshold mismatch could cause metastability.

Availability

74HCT4040PW-Q100 is available at Aetrix Electronics and suitable for engine control units, body control modules, and infotainment systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT4040PW-Q100 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, high-reliability logic, analog, and discrete components optimized for automotive, industrial, and mobile markets.

The 74HCT4040-Q100 belongs to Nexperia's automotive-qualified logic portfolio, designed specifically to replace legacy 74-series counters in safety-critical vehicle subsystems while maintaining pin-and-function compatibility.

FAQ

What is the maximum clock frequency supported by the 74HCT4040PW-Q100?

The device supports a maximum clock frequency of 24 MHz at VCC = 4.5 V and Tamb = +25 °C, verified by dynamic testing with CL = 50 pF. At full temperature range (–40 °C to +125 °C), fmax derates to 20 MHz due to increased propagation delay and reduced drive strength - confirmed in Table 7 of the Rev. 4 datasheet.

Can the 74HCT4040PW-Q100 be operated at 3.3 V supply voltage?

No - the 74HCT variant is specified only for 4.5 V to 5.5 V operation per Table 5. At 3.3 V, VIH and VIL thresholds fall outside guaranteed switching levels, risking unreliable counting. For 3.3 V systems, use the 74LVC4040 or 74AUP4040 families instead.

Is the MR (master reset) input synchronized to the clock?

No - MR is asynchronous and active HIGH. A HIGH assertion immediately forces all Q0–Q11 outputs LOW, independent of CP state or timing. This behavior is explicitly defined in Table 3 (Function table) and Figure 5 (Timing diagram), ensuring deterministic reset under fault conditions.

Does the TSSOP16 package (SOT403-1) include an exposed thermal pad?

No - the SOT403-1 package for 74HCT4040PW-Q100 has no exposed pad. Thermal dissipation relies on copper pour under pins and standard PCB trace routing. The DHVQFN16 (SOT763-1) variant does include an exposed die-pad, but the PW suffix denotes TSSOP16 exclusively.