CD4029BK - 4-Bit Binary Up/Down Counter | Harris

Industrial sequence control

The CD4029BK fits bidirectional sequence control because it combines a 4-bit binary count, selectable up/down direction, positive-edge clock triggering, and a preset function. A controller can load a defined starting state and count toward a terminal condition, making the device useful for indexing stations, cyclic process control, and repeatable automation sequences. The 16-CFP package also suits equipment where ceramic-package construction is preferred over a plastic DIP. During implementation, define the desired count direction and preset polarity in the controller logic, then confirm the clock requirements and output transition timing from the manufacturer datasheet. The catalog record confirms one 4-bit counting element and positive-edge operation, but maximum operating frequency and supply limits must be validated against the machine’s clock and noise environment.

Bidirectional position counting

Use the CD4029BK to maintain a 4-bit position count when a mechanism can move in either direction. Each accepted clock edge advances the count upward or downward according to the direction control, allowing a controller to distinguish positive from negative motion without implementing two separate counters. The positive-edge trigger prevents repeated counting while the clock remains at one level, while the preset function allows initialization at a known reference position. In motor-step or valve-cycle systems, synchronize the count clock with the position feedback event and define overflow behavior in the surrounding control logic. Validate propagation delay against the mechanical timing budget and verify operating-temperature requirements for industrial conditions.

Test and measurement sequencing

The CD4029BK can organize repeated measurements or test points through its 4-bit up/down counter and preset capability. For example, a test system can count through a defined sequence, reverse direction for a second sweep, or reload a starting value between measurements. Positive-edge clocking makes the counter suitable for digital control signals generated by test sequencers, while its four parallel outputs can represent the current step through the sequence. Keep the counter clock separate from noisy analog switching events when possible, and include reset and load logic in the fixture. The manufacturer datasheet should be used to establish valid clock widths, output loading, and timing margins before the fixture is finalized.

Digital batch counter

A 4-bit CD4029BK provides a compact solution for batch counting in dispensers, packaging equipment, and laboratory test systems. The counter can advance once per completed item, reverse when the process sequence changes direction, and be preset to a defined count for each production run. Its single counting element simplifies the logical interpretation of the four output bits, while the 16-CFP package supports systems that prefer a ceramic package. Drive the count input from a debounced completion signal so that contact bounce or switch transients cannot create unintended counts. Review output-current limits and load-capacitance requirements in the datasheet, especially when the outputs drive lamps, relays, or long board traces.

Laboratory event counter

The CD4029BK can count experimental events or divide a long test into repeatable groups. With 16 binary states, four outputs can expose the current count and permit threshold decoding by external logic. The preset function is useful when restarting a measurement at a nonzero value, while the up/down direction allows the same counter to support forward scans and reverse scans. Use a clean, stable clock and avoid deriving count pulses directly from noisy mechanical contacts unless they are properly conditioned. Confirm the allowable supply voltage, input levels, and propagation delay in the manufacturer document so that the counter remains synchronized with the laboratory controller.

Digital timer and batch divider

Use the CD4029BK as a programmable event divider when a downstream system needs to act after a fixed number of pulses. A 4-bit count provides 16 states and can be loaded repeatedly with a preset value, allowing one counter channel to perform repeated timing intervals or batch boundaries. Direction control adds flexibility when the timer must count toward a preset from either a zero or nonzero starting point. Because this is a digital counter rather than a precision timekeeping oscillator, use it with a stable system clock and derive any time interval from that clock’s frequency and accuracy. Check clock-rate and propagation-delay limits in the datasheet and account for the counter’s response time in safety-related control paths.