SIT1602BI-21-18S-25.000625E

Frequency Stability:	±20ppm
Current - Supply (Disable) (Max):	1.3µA
Height - Seated (Max):	0.032" (0.80mm)
Size / Dimension:	0.126" L x 0.098" W (3.20mm x 2.50mm)
Package / Case:	4-SMD, No Lead
Mounting Type:	Surface Mount
Ratings:	--
Current - Supply (Max):	4.1mA
Operating Temperature:	-40°C ~ 85°C
Absolute Pull Range (APR):	--
Series:	SiT1602B
Voltage - Supply:	1.8V
Output:	HCMOS, LVCMOS
Function:	Standby (Power Down)
Frequency:	25.000625MHz
Type:	XO (Standard)
Base Resonator:	MEMS
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

Oscillators are electrical circuits used to produce a repeating, periodic signal from a DC input signal, such as a sine wave, triangle wave, or square wave. The SIT1602BI-21-18S-25.000625E is an example of an oscillator circuit that produces a digital output signal.

Applications

The SIT1602BI-21-18S-25.000625E oscillator is suitable for a variety of applications, such as clocks for digital circuit applications, oscillators for signal generators, and frequency reference signal control sources.These oscillators are especially well suited for high speed systems, such as high-speed digital logic circuits, and for applications where tight timing specifications and low power consumption are needed.

Working Principle

The SIT1602BI-21-18S-25.000625E oscillator operates by maintaining a constant reference voltage and frequency output even though variations and noise may be present in the supply voltage. This is achieved by using a capacitor, with a capacitance value that is selected for the required frequency, in combination with an N-type Field Effect Transistor (FET) to act as a voltage limiter and a voltage divider network.The capacitor is charged to a voltage that is greater than the desired reference voltage at the start of the cycle, then is discharged to a level lower than the reference voltage. This process is repeated until the capacitor reaches the required frequency. The voltage divider network helps to ensure the FET’s gate voltage stays below the reference voltage.

Conclusion

The SIT1602BI-21-18S-25.000625E oscillator is a versatile and reliable oscillator circuit that produces a digital output signal. It is suitable for a variety of applications, such as clocks for digital circuit applications, oscillators for signal generators, and frequency reference signal control sources. It operates by maintaining a constant reference voltage and frequency output, even when there are variations and noise present in the supply voltage.

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