The CDCE421 is available in either its die form to fit in a 5-mm x 7-mm XO package or a 24-pin quad flat no-lead (QFN) package, giving customers flexibility to fit their designs. The new clock device is the first to integrate both on-chip EEPROM and XO circuitry for increased programmability, further simplifying the design by allowing the customer to implement a single device for various frequencies.
All device settings are programmable through a TI proprietary simple serial interface for programming after manufacturing. The device operates in a single 3.3 V supply environment and is characterized for operation in the industrial temperature range from -40C to +85C. Other key features include
the following:
* Support for crystal or LVCMOS frequencies between 27.35 MHz and 38.33 MHz
* Low-voltage differential signaling (LVDS) Output, 100-ohm differential
off-chip termination, 10.9-MHz to 400-MHz frequency range
* Differential low-voltage positive emitter-coupled logic (LVPECL) Output,
10.9-MHz to 1.175-GHz Frequency Range
* Fully-integrated programmable loop filter from 50 kHz to 400 kHz
* Typical power consumption 240 mW in LVDS mode and 300 mW in LVPECL mode
* Chip-enable control pin
* Electrostatic discharge protection exceeds 2-kV human-body model
* Excellent power supply noise rejection
TI provides a wide selection of timing support devices, both PLL-based and non-PLL-based, to support consumer, communications and memory applications.
The CDCE421 is available now in either a die form or packaged in a 24-pin QFN package and is priced at $7.00 in 1,000-piece quantities.