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ASM3P2187B Datasheet(PDF) 2 Page - PulseCore Semiconductor |
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ASM3P2187B Datasheet(HTML) 2 Page - PulseCore Semiconductor |
2 / 9 page May 2008 ASM3P2187A/B rev 0.2 Spread Spectrum Clock Generator for Mobile Applications 2 of 9 Notice: The information in this document is subject to change without notice. Pin Configurations Pin Description Pin# Pin Name Type Description 1 CLKIN/XIN I External reference Clock input or Crystal connection. 2 XOUT O Crystal connection. If using an external reference, this pin must be left unconnected. 3 SSON / PDB* I Modulation enable pin/ Power down pin. Has an Internal pull up resistor 4 SEL I Modulation rate setting pin Centre spread, SEL = “L” : Frequency Deviation ± 0.5% Centre spread, SEL = “H” : Frequency Deviation ± 1.0% Has an Internal pull up resistor. 5 REFOUT O Non-modulated clock output pin. The Frequency is same as input frequency. This pin becomes to “L” at power-down. 6 VSS P Ground Connection. Connect to system ground. 7 ModOUT O Modulated clock output pin This pin becomes to“L” at power-down. 8 VDD P Power Supply Voltage Pin. Connect to +3.3V. * SSON Pin is available in ASM3P2187A Device and PDB Pin is available in ASM3P2187B Device 6 REFOUT 1 2 3 4 5 8 ASM3P2187A CLKIN/ XIN XOUT SEL ModOUT VSS SSON VDD 7 6 REFOUT 1 2 3 4 5 7 8 ASM3P2187B CLKIN/ XIN XOUT SEL ModOUT VSS PDB VDD |
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