ICS85354 Datasheet | ICST

.. PRELIMINARY Integrated Circuit Systems, Inc. DUAL 2:1/1:2 DIFFERENTIAL -TO-LVPECL/ECL MULTIPLEXER Features - Dual 2:1/1:2 MUX - 3 LVPECL outputs - 3 differential clock inputs - CLKx pair can accept the following differential input levels: LVPECL, LVDS, CML - Maximum output frequency: 3GHz - Part-to-part skew: 85ps (typical) - Additive jitter, RMS: 0.03ps (typical) - Propagation delay: 330ps (typical) - LVPECL mode operating voltage supply range: VCC = 2.375V to 3.465V, VEE = 0V - ECL mode operating voltage supply range: VCC = 0V, VEE = -3.465V to -2.375V - -40°C to 85°C ambient operating temperature GENERAL DESCRIPTION The ICS85354 is a 2:1/1:2 Multiplexer and a member of the Hi Per Clock STM family of high perfor Hi Per Clock S™ mance clock solutions from ICS. The 2:1 Multiplexer allows one of 2 inputs to be selected onto one output pin and the 1:2 MUX switches one input to one of two outputs. This device may be useful for multiplexing multirate Ethernet Phys which have 100Mbit and 1000Mbit transmit/ receive pairs onto an optical SFP module which has a single trasmit/receive pair. Please refer to the Application Block diagram on page 2 of the data sheet. The ICS85354 is optimized for applications requiring very high performance and has a maximum operating frequency in excess of 2GHz. The device is packaged in a small, 3mm x 3mm VFQFN package, making it ideal for use on space-constrained boards. BLOCK DIAGRAM CLK_SELA PIN ASSIGNMENT CLK_SELA n QA VCC QA CLKA0 n CLKA0 CLKA1 n CLKA1 QA n QA QB0 1 n QB0 2 QB1 3 n QB1 4 16 15 14 13 12 11 10 9 5 CLKB CLKA0 n CLKA0 CLKA1 n CLKA1 6 n...