Nexperia USA Inc. HEF4040BT/S400,118

Overview

HEF4040BT/S400,118 from NXP Semiconductors is a 12-stage binary ripple counter IC with CMOS technology, operating from 3 V to 15 V supply, featuring asynchronous reset, TTL-compatible inputs, and typical propagation delay of 120 ns at 5 V. It serves as a frequency divider or event counter in timing control circuits for industrial timers and LED sequencers.

For engineers reviewing the HEF4040BT/S400,118 datasheet, HEF4040BT/S400,118 pinout, HEF4040BT/S400,118 application, or HEF4040BT/S400,118 equivalent, key selection factors include supply voltage range, reset behavior, propagation delay vs. clock frequency, and compatibility with legacy 4000-series logic families.

Technical Context

This device implements a cascaded chain of 12 D-type flip-flops, where each stage divides the input clock by two. The asynchronous master reset clears all outputs to logic low independently of clock edge timing. Input thresholds are optimized for direct interface with TTL and earlier CMOS families.

Output drive capability supports fan-out of up to 10 standard CMOS loads at 5 V. No internal pull-ups or Schmitt-trigger inputs are present - external debouncing or conditioning is required for noisy clock sources.

Key Specifications

Pinout & Package

HEF4040BT/S400,118 is housed in a 16-pin SO16 (Small Outline) plastic package with 1.27 mm pitch, JEDEC MS-012AC compliant, and rated for -40 °C to +125 °C ambient operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar binary counter applications.

Compared with CD4040BE and 74HC4040PW, HEF4040BT/S400,118 uniquely balances wide supply flexibility, industrial temperature rating, and SO16 manufacturability - making it optimal for cost-sensitive, mixed-rail embedded timing where speed is secondary to robustness.

Availability

HEF4040BT/S400,118 is available at Aetrix Electronics and suitable for industrial timer modules, LED sequencer hardware, and power sequencing controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for HEF4040BT/S400,118 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The HEF4040BT belongs to NXP's legacy logic portfolio - designed specifically for reliable, low-power digital timing functions in harsh environments where modern high-speed logic is unnecessary or incompatible.

FAQ

What is the maximum clock frequency supported by HEF4040BT/S400,118?

The maximum usable clock frequency is determined by the propagation delay of the slowest stage. At V_DD = 5 V, typical t_PD is 120 ns per stage, limiting reliable operation to approximately 4 MHz. At 15 V, delay improves to ~60 ns, enabling up to ~8 MHz - but system-level timing margins must account for ripple accumulation across all 12 stages.

Can HEF4040BT/S400,118 drive LEDs directly?

No. Its outputs are CMOS logic-level (not current-sinking), rated for ±1 mA DC drive at 5 V. Direct LED connection would exceed output current limits and risk latch-up. An external transistor buffer or dedicated LED driver IC is required for any LED load exceeding 0.5 mA.

Is the reset input debounced internally?

No. The MR pin has no internal filtering or hysteresis. External RC filtering or a Schmitt-trigger gate is required if the reset signal originates from a mechanical switch or noisy control line to prevent spurious resets during contact bounce or EMI transients.

Does HEF4040BT/S400,118 support synchronous reset?

No. Reset is strictly asynchronous and active-high. There is no provision for clock-synchronized reset assertion or release. If synchronous behavior is required, external logic (e.g., AND gate combining MR and CP) must be added to gate the clock path during reset assertion.