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NB3H5150-01 Datasheet(PDF) 6 Page - ON Semiconductor |
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NB3H5150-01 Datasheet(HTML) 6 Page - ON Semiconductor |
6 / 19 page NB3H5150−01 www.onsemi.com 6 become effective and will begin to output the selected frequencies. 2. Subsequent changes to any FS pin(s) will cause the associated CLK(n) output(s) to momentarily go to static levels, and then to resume at the new frequency; CLK(n) will follow the FS(n) pin programmable Tables 3 and 4 for output frequencies and interface levels. Note that in changing from LVPECL to LVCMOS (or vice−versa), output logic levels cannot be guaranteed. This is because the receiver inputs are not likely to change in a given application, and the LVPECL output loading in the application will also not change. It is logical to presume that the output type will be predetermined and fixed. Therefore, in a system/application, the user should be aware that subsequent change to the FS pin should only change frequency, and not output type. 3. Power off/on cycle will repeat the entire sequence 4. Power Down To initiate the Power−Down mode, the SDA pin must be LOW and remain LOW. If the SCL/PD pin is taken HIGH at any time, the device enters a complete power−down mode with a current consumption of less than 1 mA for the entire device. When SCL/PD is subsequently taken LOW, the device will function as though power were removed and re−applied. That is, sequencing will begin at #1. Power−down is also available via I2C with a register file. FS(n) Pin Programmable Selection of Output Frequencies and Levels Table 3. NB3H5150−01MNTXG − CLK1A:3A & CLK1B:3B OUTPUT FREQUENCY SELECT TABLE WITH 25 MHz CRYSTAL Logic Level FS1 (CLK1) (MHz) FS2 (CLK2) (MHz) FS3 (CLK3) (MHz) Low 156.25 (LVPECL) 156.25 (LVPECL) 156.25 (LVPECL) Mid / Float* 25.00 (LVPECL) 100.00 (LVPECL) 125.00 (LVPECL) High 50.00 (LVPECL) 125.00 (LVPECL) 50.00 (LVPECL) *(Default) Table 4. NB3H5150−01MNTXG − CLK4A & CLK4B OUTPUT FREQUENCY SELECT TRUTH TABLE (MHz) WITH 25 MHz CRYSTAL* FS4A FS4B CLK4 (MHz) Divider Type Low Low 33.33 (LVCMOS) Integer Low Mid / Float 66.66 (LVCMOS) Fractional Low High 133.33 (LVCMOS) Fractional Mid / Float Low 133.33 (LVPECL) Fractional Mid / Float* Mid / Float* 156.25 (LVPECL) Integer Mid / Float High 125.00 (LVPECL) Integer High Low 25.00 (LVPECL) Integer High Mid / Float 100.00 (LVPECL) Integer High High 161.1328 (LVPECL) Fractional *(Default) |
Similar Part No. - NB3H5150-01_16 |
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Similar Description - NB3H5150-01_16 |
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