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MAX3629 clock generator

Maxim introduces the MAX3629 low-jitter precision clock generator optimized for network applications.
MAX3629 clock generator is specially designed for Ethernet Networking Equipment and integrates a crystal oscillator and a phase-locked loop (PLL) to generate high-frequency clock outputs for Ethernet applications.
The MAX3629 contains five LVDS outputs and three LVCMOS outputs.
The MAX3629 is a mixed analog/digital IC with the output frequencies are selectable among 125MHz, 156.25MHz, and 312.5MHz by pin control.
To take full advantage of on-board filtering and noise attenuation, in addition to excellent on-chip power-supply rejection, this part provides a separate power-supply pin, VDDA, for the VCO circuitry.
MAX3629 requires a power supply of +3.3V ±5%.
Main features of the MAX3629 clock generator are : Crystal Oscillator Interface: 25MHz , OSC_IN Interface: PLL Enabled: 25MHz / PLL Disabled: 20MHz to 320MHz , One LVDS Output at 125MHz/156.25MHz/312.5MHz (Selectable with FSELA), Four LVDS Outputs at 125MHz/156.25MHz/312.5MHz (Selectable with FSELB) , Three LVCMOS Outputs at 125MHz/156.25MHz (Selectable with FSELB) , Low Phase Jitter: 0.4psRMS (12kHz to 20MHz) , Excellent PSNR , Operating Temperature Range: 0°C to +70°C
MAX3629 clock generator

NE1617A two-channel temperature monitor

Philips semiconductor introduced the NE1617A two-channel temperature monitor. NE1617A measures the temperature of itself and the temperature of a remote sensor which is a diode connected transistor. The remote sensor can be in the form of either a discrete NPN/PNP, such as the 2N3904/2N3906, or a diode connected PNP built into another die .
The temperature from both , the remote and local sensors is stored in a register that can be read via a 2-wire SMBus.
NE1617A from Philips Semiconductor can be used for replace the Maxim MAX1617 and Analog Devices ADM1021 .
Main features of the NE1617A are : monitors local and remote temperature , local (on-chip) sensor accuracy: ±2 °C at 60 °C to 100 °C / ±3 °C at -40 °C to 125 °C , Remote sensor accuracy: ±3 °C at 60 °C to 100 °C / ±5 °C at -40 °C to 125 °C , No calibration required , Programmable overtemperature/undertemperature alarm , SMBus 2-wire serial interface up to 100 kHz , 3 V to 5.5 V supply range , 70 mA supply current in operating mode , 3 mA (typical) supply current in standby mode
 NE1617A two-channel temperature monitor

LTC2978 power supply monitor

Linear Technology introduced LTC2978 chip which is an octal, PMBus compliant power supply monitor, supervisor, sequencer and margin controller.
LTC2978 Power Supply Monitor can be use for digital management of up to eight 0V to 6V power supplies. The LTC2978's PMBus compliant interface provides easy access to an on-board EEPROM, giving users supply configuration, fault response and logging capabilities.
Main features of the LTC2978 power supply monitor are : PMBus Compliant Interface and Command Set , Configuration EEPROM , Fault Logging to Internal EEPROM , Monitors Eight Output Channels and One Input Voltage , 8-Channel Sequencer , Programmable Watchdog Timer , Eight UV/OV Voltage Supervisors , Eight 10-Bit Voltage-Buffered IDACs with Soft Connect , Supports Multichannel Fault Management , On-Chip Digital Temperature Sensor.
LTC2978 power supply monitorLTC2978


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