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Product Info
- General Description
- Features
- Power Supply: 5V +/-10% (1MHZ û 50MHz)
- Power Supply: 3.3V +/-5% (1MHZ û 30MHz)
- Qualified from -55 to +225°C (Tj)
- Two input sources: crystal (1 to 50 MHz), external clock (DC to 50MHz)
- Operation from 32.768kHz crystals
- Programmable frequency divider: fin, fin/2, fin/4 and fin/8
- Programmable crystal driver and output driver strength
- Available in CDIL24 ceramic package
- Validated at 225°C for 43800 hours (and still on-going)
- Applications
- Well logging, Automotive, Aeronautics & Aerospace
- Precision timing
The CHT-CG50 is a versatile HighTemperature crystal clock generator with extended functional capabilities. The chip features a programmable crystal oscillator driver with an enable/disable control signal, an external clock input, a programmable divider chain and a programmable strength three-state output buffer. Using an external crystal, it is intended to provide reliable precision performance throughout the -55 to +225°C temperature range for supply voltages between 3.3V and 5V.
The CHT-CG50 can operate with crystals from 1MHz to 50MHz. The output frequency can be selected by means of a programmable divider, providing division factors of one, two, four and eight. The programmability of the crystal driver allows working with a wide range of crystals. A crystal driver enable pin (/XtalEn) is included for extremely low power applications, as well as an output enable pin (/OE). In applications requiring only a precision divider chain, where an external clock source is already present, the crystal driver may be bypassed by means of inputs ExtClkIn and ExtClkEn.