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DSC2010FI2-B0004T Datasheet(PDF) 3 Page - Micrel Semiconductor |
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DSC2010FI2-B0004T Datasheet(HTML) 3 Page - Micrel Semiconductor |
3 / 6 page Micrel, Inc. DSC2010FI2-B0004 Operational Description The DSC2010FI2-B0004 is a LVCMOS oscillator consisting of a MEMS resonator and a supporting PLL IC. The LVCMOS output is generated through independent 8-bit programmable dividers from the output of the internal PLL. The actual frequency output by DSC2010FI2-B0004 is controlled by an internal pre-programmed memory (OTP). This memory stores all coefficients required by the PLL for up to four different frequencies. Two control pins (FS0, FS1) select the output frequency. When OE (pin 1) is floated or connected to VDD, the DSC2010FI2-B0004 is in operational mode. Driving OE to ground will disable the output driver (hi- impedance mode). DSC2010FI2-B0004 has programmable output drive strength. Using three control pins (OS0-OS2) the drive strength can be adjusted to match circuit board impedances to reduce power supply noise, overshoot/ undershoot and EMI. Table 1 displays typical rise / fall times for the output with a 15pF load capacitance as a function of these control pins at VDD = 3.3V and room temperature. Output Drive Strength Bits [OS2, OS1, OS0] - Default is [111] 000 001 010 011 100 101 110 111 tr (ns) 2.1 1.7 1.6 1.4 1.3 1.3 1.2 1.1 tf (ns) 2.5 2.4 2.4 2.2 1.8 1.6 1.4 1.4 Table 1. Rise/Fall Times for Drive Strengths Output Clock Frequencies Frequency select bits are weakly tied high so if left unconnected the default setting will be [11] and the device will output the associated frequency highlighted in bold. Freq (MHz) Freq Select Bits [FS1, FS0] - Default is [11] 00 01 10 11 CLK1 155.52 106.25 NA 125 Table 2. Pin-Selectable Output Frequencies Absolute Maximum Ratings Item Min. Max. Units Condition Supply Voltage -0.3 +4.0 V Input Voltage -0.3 VDD + 0.3 V Junction Temp - +150 °C Storage Temp -55 +150 °C Soldering Temp - +260 °C 40sec max. ESD HBM MM CDM - 4000 400 1500 V 1000+ years of data retention on internal memory January 19, 2015 3 Revision 1.0 tcghelp@micrel.com or (408) 955-1690 2642 |
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