40193BDC

Overview

The CD40193BDC is a synchronous 4-bit up/down decade counter manufactured by National Semiconductor. It is a monolithic complementary MOS (CMOS) integrated circuit designed for binary counting operations. The device features dual clock inputs to manage counting up and down independently, with outputs changing on the positive-going transition of the active clock signal. It includes asynchronous clear functionality and dedicated carry and borrow outputs to facilitate cascading for expansion to N-bit configurations.

Feature Summary

• Synchronous 4-bit up/down binary counting capability
• Dual independent clock inputs for up and down operations
• Asynchronous clear input for immediate reset
• Carry and borrow outputs for easy multi-stage expansion

Applications

• Digital timing circuits requiring precise count sequences
• Frequency division networks in digital systems
• Cascaded counter arrays for extended bit-width applications
• Control logic for sequential state machines

Procurement Notes

Verify the manufacturer origin carefully, as National Semiconductor was acquired by Texas Instruments. Ensure the specific suffix 'DC' matches the required package type and temperature rating from the official datasheet. Confirm that the component meets current RoHS compliance standards if required for your assembly process. Cross-reference the part number with Texas Instruments documentation to ensure accurate pinout and electrical specifications are applied during design.

Selection Notes

Select this component when a synchronous CMOS counter with dual clock inputs is required for binary counting. It is suitable for designs needing low power consumption and high noise immunity within a wide supply voltage range. Consider its compatibility with TTL logic levels if interfacing with older digital systems. Verify that the package style and operating temperature range meet the specific environmental constraints of the target application.

Part Context

The CD40193 series belongs to the standard 4000-series CMOS logic family. These counters are widely used in general-purpose digital electronics due to their versatility and ease of use. The device is functionally equivalent to other manufacturers' parts like the MM74C193, allowing for flexible sourcing options while maintaining consistent performance characteristics across different production batches.

Replacement Considerations

• MM74C193
• CD40193BC

FAQ

How does the CD40193BDC handle counting direction?

Counting up and down is performed using two separate count inputs. One input must be held HIGH while the other is clocked to determine the direction of the count.

What is the purpose of the carry and borrow outputs?

These outputs allow for easy expansion to N-bit counters by cascading multiple devices together, enabling more complex counting sequences beyond the 4-bit limit.