555 Timer

In 555 timer,Pin 1 is

• Ground

• Reset

• Trigger

• Output

In 555 Timer,Reset Pin is at

• 1

• 8

• 4

• 3

The internal circuitry of the 555 timer consists of ________, an R-S flip-flop, a transistor switch, an output buffer amplifier, and a voltage divider.

• one comparator

• a voltage amplifier

• two comparators

• peak detector

What is the function of the comparators in the 555 timer circuit?

• to compare the output voltages to the internal voltage divider

• to compare the input voltages to the internal voltage divider

• to compare the output voltages to the external voltage divider

• to compare the input voltages to the external voltage divider

The function of Pin 3 is:

• Control Voltage

• Discharge

• Output

• Reset

What is the function of the Reset pin?

• To discharge the capacitor “C”

• To reset the chip

• To make the output of the chip “HIGH”

The 555 timer IC is made up of a combination of linear comparators and digital flip-flops.

• True

• False

In a 555 timer, a series connection of three resistors sets the reference voltage levels to the two comparators at _______ and __________.

• 2VCC/3, VCC/3

• VCC/2, VCC/4

• VCC, VCC/2

• VCC, VCC

A 555 IC is used to produce

• counter

• register

• oscillations

• byte

The timer IC 555 is available in ____ package.

• 3 pin

• 14 pin DIP

• 8 pin DIP

• 16 pin DIP