CDC421A125 Series

125-MHz fully integrated fixed frequency low-jitter crystal oscillator clock generator

Catalog

125-MHz fully integrated fixed frequency low-jitter crystal oscillator clock generator

Part	Frequency - Max	Mounting Type	Multiplier	Divider	Package / Case	Output Ratio	Input Ratio	Number of Circuits	Package Length	Package Name	Package Width	Operating Temperature (Min)	Operating Temperature (Max)	Output	Voltage - Supply (Maximum)	Voltage - Supply (Minimum)	Type	PLL	Input	Differential Output	Differential Input
Texas Instruments CDC421A125RGER	125 MHz	Surface Mount	No	Yes	24-VFQFN Exposed Pad	1	1	1	4 mm	24-VQFN	4 mm	-40 °C	85 °C	LVPECL	3.6 V	3 V	Clock Generator	Yes	Crystal LVCMOS	Yes	No
Texas Instruments CDC421A125RGET	125 MHz	Surface Mount	No	Yes	24-VFQFN Exposed Pad	1	1	1	4 mm	24-VQFN	4 mm	-40 °C	85 °C	LVPECL	3.6 V	3 V	Clock Generator	Yes	Crystal LVCMOS	Yes	No

Catalog

125-MHz fully integrated fixed frequency low-jitter crystal oscillator clock generator

Description

The CDC421Axxx is a high-performance, low-phase-noise clock generator. It has an integrated low-noise, LC-based voltage-controlled oscillator (VCO) that operates within the 1.75 GHz to 2.35 GHz frequency range. It has an integrated crystal oscillator that operates in conjunction with an external AT-cut crystal to produce a stable frequency reference for a phase-locked loop (PLL)-based frequency synthesizer. The output frequency (fOUT) is proportional to the frequency of the input crystal (fXTAL). The device operates in 3.3-V supply environment and is characterized for operation from -40°C to +85°C. The CDC421Axxx is available in a QFN-24 4-mm × 4-mm package. The CDC421Axxx differs from the CDC421xxx in the following ways: The CDC421Axxx has an improved startup circuit to enable correct operation for all power-supply ramp times. The CDC421Axxx is a high-performance, low-phase-noise clock generator. It has an integrated low-noise, LC-based voltage-controlled oscillator (VCO) that operates within the 1.75 GHz to 2.35 GHz frequency range. It has an integrated crystal oscillator that operates in conjunction with an external AT-cut crystal to produce a stable frequency reference for a phase-locked loop (PLL)-based frequency synthesizer. The output frequency (fOUT) is proportional to the frequency of the input crystal (fXTAL). The device operates in 3.3-V supply environment and is characterized for operation from -40°C to +85°C. The CDC421Axxx is available in a QFN-24 4-mm × 4-mm package. The CDC421Axxx differs from the CDC421xxx in the following ways: The CDC421Axxx has an improved startup circuit to enable correct operation for all power-supply ramp times.