MC74HC390ADTR2G

Counter Dividers Overview

The MC74HC390ADTR2G is a high-performance silicon-gate CMOS dual 4-stage binary ripple counter with divide-by-two and divide-by-five sections. It operates within a supply voltage range of 2.0 V to 6.0 V and supports an operating temperature from -55°C to +125°C. The device features asynchronous reset inputs for each counter section and outputs directly interface to CMOS, NMOS, and TTL loads. Maximum clock frequencies reach up to 50 MHz at 6.0 V, with propagation delays varying by configuration and voltage.

Counter Dividers Feature Summary

• Dual independent counters comprising separate divide-by-two and divide-by-five sections
• Asynchronous reset functionality for both counter sections
• Outputs compatible with standard CMOS, NMOS, and LSTTL logic families
• High noise immunity characteristics inherent to CMOS technology

Counter Dividers Applications

• Binary counting applications requiring cascaded divide-by-100 configurations
• BCD (Binary-Coded Decimal) decade divider implementations
• Bi-quinary count sequence generation for specialized display or timing systems
• General-purpose digital frequency division circuits

Counter Dividers Procurement Notes

Verify the specific package suffix 'DT' corresponds to the TSSOP-16 form factor required for your PCB layout. Confirm that the ordering code includes the 'G' designation to ensure compliance with lead-free and RoHS standards. Cross-reference the manufacturer's latest datasheet revision to validate electrical parameters against your system requirements before finalizing procurement.

Counter Dividers Selection Notes

Select this component when a dual-counter solution with independent clock inputs is necessary. Ensure the application voltage falls between 2.0 V and 6.0 V to maintain specified performance levels. Consider the ripple counter architecture's decoding spikes if the outputs are used as clocks; gating with the main clock may be required for stable operation in synchronous designs.

Counter Dividers Part Context

This part belongs to the MC74HC390A series, which maintains pinout compatibility with LS390 devices. It is manufactured using high-performance silicon-gate CMOS technology. The device is available in multiple packages including SOIC-16, QFN16, and TSSOP-16, with the ADTR2G variant specifically denoting the TSSOP-16 surface-mount package.

Counter Dividers Replacement Considerations

MC74HC390ADG

Counter Dividers FAQ

How are the divide-by-two and divide-by-five sections connected for BCD counting?

For BCD counting, connect output QA to the Clock B input. This configuration creates a decade divider with BCD output where QA serves as the least significant bit.

What triggers the internal flip-flops in the MC74HC390ADTR2G?

The internal flip-flops are triggered by high-to-low transitions of the respective clock inputs (Clock A or Clock B).