NE555P IC COMPONENTS IC CHIP 555 Type, Timer/Oscillator (Single) IC 100kHz 8-PDIP

NE555P

512 Kbit (64K x8) UV EPROM and OTP EPROM

Features

Time From Microseconds to Hours

Astable or Monostable Operation

Adjustable Duty Cycle

TTL-Compatible Output Can Sink or Source Up to 200mA

On Products Compliant to MIL-PRF- 38535, All Parameters Are Tested Unless Otherwise Noted. On All Other Products, Production Processing Does Not Necessarily Include Testing of All Parameters.

Applications

Fingerprint Biometrics

Iris Blometrics

RFID Reader

Description

These devices are precision timing circuits capable of producing accurate time delays or oscillation. In the time-delay or mono-stable mode of operation, the timed interval is controlled by a single external resistor and capacitor network. In the a-stable mode of operation, the frequency and duty cycle can be controlled independently with two external resistors and a single external capacitor.

The threshold and trigger levels normally are two-thirds and one-third, respectively, of Vcc. Threse levels can be altered by use of the control-voltage terminal. When the trigger input falls below the trigger level, the flip-flop is set, and the output goes high. Ifthe trigger input is above the threshold level, the flip-flop is reset and the output is low. The restet (RESRT) input can override all other inputs and can be used to initiate a new timing cycle. When RESTE goes low, the flip-flop is reset, and the output goes low. When the output is low, a low-impedance path is provided between discharge (DISCH) and ground.

The output ciruit is capable of sinking or sourcing curent up to 200 mA. Operaion is specified for supplies of 5V to 15V. With a 5-V supply, output levels are compatible with TTL inputs.