ICS9148-37

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.0 V
Logic Inputs . . . . . . . . . . . . . . . . . . . . GND 0.5 V to VDD +0.5 V
Ambient Operating Temperature . . . . . . . . . . . . . 0°C to +70°C
Storage Temperature . . . . . . . . . . . . . . . . .   65°C to +150°C
Case Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   115°C
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These ratings are stress specifications only and functional operation of the device at these or any other conditions above those listed in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect product reliability.

The ICS9148-37 is the single chip clock solution for Desktop/Notebook designs using the VIA MVP3 style chipset. It provides all necessary clock signals for such a system.

Spread spectrum of the ICS9148-37 may be enabled through I²C programming. Spread spectrum typically reduces system EMI by 8dB to 10dB. This simplifies EMI qualification without resorting to board design iterations or costly shielding. The ICS9148- 37 employs a proprietary closed loop design, which tightly controls the percentage of spreading over process and temperature variations.

Serial programming I²C interface of  the ICS9148-37 allows changing functions, stop clock programming and frequency selection. The SD_SEL latched input allows the SDRAM frequency to follow the CPUCLK frequency(SD_SEL=1) or the AGP clock frequency(SD_SEL=0)