ICS580-01

www.DataSheet4U.com ICS580-01 Glitch-Free Clock Multiplexer Features Packaged in 16 pin narrow (150 mil) SOIC No short pulses or glitches on output Operates to 200 MHz Does not add jitter or phase noise to the clock User controlled or automatic switching Low skew outputs Clock detect feature Ideal for systems with backup or redundant clocks Selectable timeouts for clock detection Separate supply voltages allow power supply voltage translation Operates to 2.5 V Description The ICS580-01 is a clock multiplexer (mux) designed to switch between 2 clock sources with no glitches or short pulses. The operation of the mux is controlled by an input pin but the part can also be configured to switch automatically if one of the input clocks stops. The part also provides clock detection by reporting when an input clock has stopped. For a clock mux with zero delay and smooth switching, see either the ICS581-01 or ICS581-02. Block Diagram VDDI VDDC CLK1 INB INA SELB OE2 1 OE1 0 CLK2 Transition Detector OE3 NO_INA Transition Detector OE4 NO_INB DIV Timer 1 Revision 030300 Printed 11/28/00 Integrated Circuit Systems, Inc. 525 Race Street San Jose CA95126 (408) 295-9800tel www.icst.com MDS 580-01 A www.DataSheet4U.com ICS580-01 Glitch-Free Clock Multiplexer Pin Assignment SELB DIV VDDI INA INB GND OE4 OE3 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 OE1 VDDC CLK1 CLK2 NO_INA NO_INB GND OE2 Timeout Selection DIV 0 1 Nominal Timeout 600 ns 75 ns Pin De...