KA556

Programmable Timers And Oscillators Overview

The KA556 is a dual monolithic timing circuit manufactured by onsemi, effectively combining two independent KA555 timers into a single package. It operates within a supply voltage range of 4.5V to 16V and supports both astable and monostable modes. The device features high output current capability, capable of sourcing or sinking up to 200mA. Timing functions are determined by external resistors and capacitors for each timer section. Electrical characteristics include a typical supply current of 30mA at 15V and temperature stability of 0.005% per °C.

Programmable Timers And Oscillators Feature Summary

• Dual configuration replacing two separate KA555 timers
• High output current capability (200mA source/sink)
• TTL compatible logic levels
• Adjustable duty cycle in astable mode

Programmable Timers And Oscillators Applications

• Precision timing circuits
• Pulse width modulation (PWM)
• Traffic light control systems
• Sequential timing controllers
• Time delay generators

Programmable Timers And Oscillators Procurement Notes

Verify the specific suffix (e.g., 'I' for industrial temperature range) against project requirements. Confirm package type availability as the standard version is 14-DIP while the 'D' variant uses 14-SOP. Check manufacturer documentation for lifecycle status updates.

Programmable Timers And Oscillators Selection Notes

Select the KA556I variant if operation outside the commercial range of 0°C to +70°C is required. Ensure external components support the maximum total resistance limits (20MΩ at 15V). Verify that the load current does not exceed the 200mA output rating.

Programmable Timers And Oscillators Part Context

This component belongs to the KA55x series of dual timers. It serves as a direct functional equivalent to other industry-standard dual 555 timers, offering pin-compatible integration for designs requiring two independent timing channels without increasing board space.

Programmable Timers And Oscillators Replacement Considerations

NE556N

Programmable Timers And Oscillators FAQ

What is the maximum output current?

The output structures can sink or source up to 200mA.

How do the two timers operate?

The two timers operate independently of each other, sharing only the VCC and ground connections.

What triggers the reset function?

The circuit may be triggered and reset on falling waveforms; lowering the reset voltage inhibits timing.