ASM2I99448

The ASM2I99448 is a 3.3V or 2.5V compatible, 1:12 clock fanout buffer targeted for high performance clock tree applications. With output frequencies up to 350 MHz and output skews less than 150 pS, the device meets the needs of most demanding clock applications.

The ASM2I99448 is specifically designed to distribute LVCMOS compatible clock signals up to a frequency of 350MHz. Each output provides a precise copy of the input signal with a near zero skew. The outputs buffers support driving of 50 terminated transmission lines on the incident edge: each output is capable of driving either one parallel terminated or two series terminated transmission lines.

Two selectable, independent clock inputs are available,  providing support of LVCMOS and differential LVPECL  clock distribution systems. The ASM2I99448 CLK_STOP control is synchronous to the falling edge of the input clock. ASM2I99448 allows the start and stop of the output clock signal only in a logic low state, thus eliminating potential output runt pulses. Applying the OE control will force the outputs into highimpedance mode.

All inputs of ASM2I99448 have an internal pullup or pulldown resistor preventing unused and open inputs from floating. The device supports a 2.5V or 3.3V power supply and an ambient temperature range of 40°C to +85°C. The ASM2I99448 is pin and function compatible but performanceenhanced to the MPC948.