Nexperia USA Inc. HEF4040BT,653

Overview

HEF4040BT,653 from Nexperia is a 12-stage binary ripple counter IC with asynchronous master reset (MR), clock input (CP) triggered on HIGH-to-LOW transition, and twelve fully buffered outputs (Q0–Q11). It operates across 3.0 V to 15.0 V supply, supports -40 °C to +85 °C ambient range, and features overvoltage-tolerant inputs up to 15 V - enabling use in level-shifting and frequency-division circuits for industrial timing control.

For engineers reviewing the HEF4040BT,653 datasheet, HEF4040BT,653 pinout, HEF4040BT,653 application, or HEF4040BT,653 equivalent, key selection considerations include its 12-bit ripple architecture, MR-active-HIGH asynchronous clear, static CMOS toggle flip-flop stages, and SO16 package compatibility with legacy 4000-series logic designs.

Technical Context

The HEF4040BT,653 implements a cascaded chain of 12 static CMOS toggle flip-flops, where each stage divides the preceding output by two - yielding Q0 = f_CP/2, Q1 = f_CP/4, ..., Q11 = f_CP/4096. Propagation delay from CP to Q0 is 78 ns (typ. at VDD = 5 V, CL = 50 pF), and inter-stage delay (Qn → Qn+1) is as low as 10 ns (typ. at VDD = 15 V).

Its asynchronous MR input forces all outputs LOW independent of CP timing, with minimum pulse width of 10 ns (VDD = 15 V). Input clamping current tolerance (±10 mA) and HBM ESD rating >2000 V support robust operation in noisy industrial environments without external protection circuitry.

Key Specifications

Pinout & Package

HEF4040BT,653 is housed in a plastic small outline package (SO16), SOT109-1 variant, with 16 leads, 3.9 mm body width, and standard 1.27 mm lead pitch - compatible with automated PCB assembly and legacy 4000-series footprint layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CD4040BE and 74HC4040PW, HEF4040BT,653 uniquely balances wide voltage operation (3–15 V), overvoltage-tolerant inputs, SO16 surface-mount compatibility, and industrial temperature range - making it the only option among the three qualified for mixed-voltage industrial control interfaces.

Availability

HEF4040BT,653 is available at Aetrix Electronics and suitable for frequency division, time delay generation, industrial control counting, and level-shifting interface applications requiring stable component supply across extended temperature and voltage ranges.

Supply support for HEF4040BT,653 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, discrete, and MOSFET solutions optimized for efficiency and robustness in industrial, automotive, and consumer applications.

The HEF4040BT,653 belongs to Nexperia's HEF4000B series - a family of radiation-hardened, wide-supply-voltage CMOS logic ICs designed specifically for reliability-critical industrial timing, control, and signal conditioning functions.

FAQ

What is the maximum clock frequency supported by HEF4040BT,653?

The maximum clock frequency is 50 MHz at VDD = 15 V, 30 MHz at VDD = 10 V, and 20 MHz at VDD = 5 V - measured under specified test conditions (CL = 50 pF, tr/tf ≤ 20 ns). Performance degrades linearly with increasing load capacitance per the formula tPHL = 22 ns + (0.16 ns/pF)×CL at 15 V.

Can HEF4040BT,653 be used with a 3.3 V supply?

Yes - the device is fully specified down to 3.0 V supply voltage. At 3.3 V, VIH is guaranteed ≥2.3 V and VIL ≤1.0 V, ensuring reliable interfacing with 3.3 V microcontrollers. However, output drive strength (IOL/IOH) is reduced versus 5 V or higher operation.

Is the master reset (MR) input synchronous or asynchronous?

MR is asynchronous and active HIGH: asserting MR immediately forces all Q outputs LOW, independent of the CP signal state or timing. The minimum MR pulse width is 10 ns at VDD = 15 V, and recovery time after MR release is also 10 ns before valid counting resumes.

Does HEF4040BT,653 require external pull-up or pull-down resistors on unused inputs?

No - all inputs are CMOS with negligible leakage (<±1.0 μA), and internal structure ensures stable logic states without external biasing. However, floating inputs should still be avoided in practice; tie MR to VSS when not in use, and CP to VSS or VDD depending on system idle state to prevent unintended toggling.