40110 DIP Up / Down Counter Latch Decoder Driver

The 40110 DIP Up / Down Counter Latch Decoder Driver is an exceptional, monolithic CMOS integrated circuit. It uniquely combines four essential digital functions—counting, latching, decoding, and driving—into a single 16-pin Dual In-line Package (DIP). Essentially, this component simplifies the design of digital displays by eliminating the need for multiple external chips. It features a versatile decade (0 to 9) up/down counting capability. This makes it perfect for scoreboards, digital clocks, and industrial metering. Overall, the 40110 DIP Up / Down Counter Latch Decoder Driver is the go-to choice for reliable, high-voltage operation with direct common-cathode LED display drive capability.

Integrated Functionality and Dual Clock Versatility

This IC is engineered for highly efficient control of visual numeric displays. To begin with, it offers robust control logic within its architecture.

• Up/Down Decade Counter: The core is a Johnson counter circuit that counts in the decimal range (0-9). Significantly, it features separate clock-up (CLKUP​) and clock-down (CLKDN​) inputs. Therefore, this dual-clock design provides flexible counting control. The counter can clock up or down independently of the state of the other clock line.
• Built-in Latch/Storage: Furthermore, an integrated storage latch follows the counter. Specifically, the Latch Enable ($\text{L-EN}$) pin allows the current count value to be held and displayed. This means the display remains static while the counter continues to increment or decrement in the background. This is crucial for multiplexed display systems.
• Seven-Segment Decoder: In addition, the internal logic immediately decodes the current BCD (Binary-Coded Decimal) count from the latch. Consequently, no external decoding circuitry is required to translate the count value into a seven-segment format.
• Display Driver Capability: The output stage consists of seven-segment bipolar drivers. Critically, these drivers can source up to $25\text{mA}$ of current per segment. Hence, this current is sufficient to directly power common-cathode LED displays, low-voltage incandescent, or fluorescent lamps without requiring external transistors.

Key Operational Features for Advanced Control

The 40110 DIP Up / Down Counter Latch Decoder Driver is part of the high-performance CD4000B series, ensuring broad system compatibility and reliability.

• Wide Voltage Range: It operates effectively across a wide supply voltage range, typically from $3\text{V}$ to $18\text{V}$. This versatility allows for integration into both low-power battery applications and high-voltage industrial systems.
• Easy Cascading: Moreover, the chip simplifies the creation of multi-digit displays using minimal external components. Specifically, the integrated $\text{CARRY}$ and $\text{BORROW}$ outputs (active-low pulses) can be directly tied to the CLKUP​ and CLKDN​ inputs of the next adjacent decade counter. This capability ensures clean ripple-through counting across multiple stages.
• Control Inputs: The Reset ($\text{RESET}$) pin provides an asynchronous override. When activated, it clears the counter back to zero, allowing for instant system initialization. Additionally, a Toggle Enable ($\text{TOGG-EN}$) input can be used to stop the counting process while maintaining the current value.
• Noise Immunity: Finally, leveraging CMOS technology, the 40110 DIP Up / Down Counter Latch Decoder Driver offers high noise immunity. This robustness is essential for reliable function in electrically noisy industrial and automotive environments.

Dominant Applications

• Digital Readouts: Ideal for building precise digital displays in frequency meters and timers.
• Scoreboards and Counters: The most popular use is in athletic scoreboards and general event counters due to its up/down capability and direct display drive.
• Control Systems: Employed in machine tool controls and automated systems requiring a count that increments or decrements.
• Digital Clock Faces: Used in early digital clock designs to count minutes and seconds due to its integrated decode and drive features.