ICS843034-01

Supply Voltage, V_CC ..................4.6V
Inputs, V_I ...............-0.5V to V_CC + 0.5V
Outputs, V_O (LVCMOS) ........-0.5V to V_CCO + 0.5V
Outputs, I_O (LVPECL)
Continuous Current ..................50mA
Surge Current ....................100mA
Package Thermal Impedance, _JA ....47.9°C/W (0 lfpm)
Storage Temperature, T_STG........ -65°C to 150°C

NOTE: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the  device. These
          ratings are stress specifications only. Functional operation of product at these conditions or any conditions beyond
          those listed in the DC Characteristics or AC Characteristics is not implied. Exposure to absolute maximum rating
          conditions for extended periods may affect product reliability.

The ICS843034-01 is a general purpose, low phase noise LVPECL synthesizer which can generate frequencies for a wide variety of applications. The ICS843034-01 has a 4:1 input Multiplexer from which the following inputs can be selected: 1 differential input, 1 single-ended input, or one of two crystal oscillators, thus making the device ideal for frequency translation or generation. Each differential LVPECL output pair has an output divider which can be independently set so that two different frequencies can be generated. Additionally, each LVPECL output pair has a dedicated power supply pin so the outputs can run at 3.3V or 2.5V. The ICS843034-01 also supplies a buffered copy of the reference clock or crystal frequency on the single-ended REF_CLK pin which can be enabled or disabled (disabled by default). The output frequency can be programmed using either a serial or parallel programming interface.

The ICS843034-01 has excellent <1ps phase jitter performance over the 637kHz - 5MHz integration range, thus making it suitable for use in Fibre Channel, SONET, and Ethernet/1Gb Ethernet applications.

Example applications of the ICS843034-01 include systems which must support both FEC and non FEC rates. In 10Gb Fibre Channel, for example, you can use a 25.5MHz crystal to generate a 159.375MHz reference clock, and then switch to a 20.544MHz crystal to generate 164.355MHz for 66/64 FEC. Other applications could include supporting both Ethernet frequencies and SONET frequencies in an application. When Ethernet frequencies are needed, a 25MHz crystal can be used and when SONET frequencies are needed, the input MUX can be switched to select a 38.88MHz Crystal.