ASM5P23S09A

ASM5P23S09A is a versatile, 3.3V zero-delay buffer designed to distribute high-speed clocks with Spread Spectrum capability. It is available in a 16-pin package. The ASM5P23S05A is the eight-pin version of the ASM5P23S09A. It accepts one reference input and drives out five low-skew clocks.

The -1H version of the ASM5P23SxxA operates at up to 133 MHz frequency, and has higher drive than the -1 device. All parts have on-chip PLLs that lock to an input clock on the REF pin. The PLL feedback is on-chip and is obtained from the CLKOUT pad.

The ASM5P23S09A has two banks of four outputs each, which can be controlled by the Select inputs as shown in the Select Input Decoding Table. If all the output clocks are not required, Bank B can be three-stated. The select input also allows the input clock to be directly applied to the outputs for chip and system testing purposes.

Multiple ASM5P23S09A and ASM5P23S05A devices can accept the same input clock and distribute it. In this case the skew between the outputs of the two devices is guaranteed to be less than 700 pS.

All outputs have less than 200 pS of cycle-to-cycle jitter. The input and output propagation delay is guaranteed to be less than 250 pS, and the output to output skew is guaranteed to be less than 250 pS.

The ASM5P23S09A and the ASM5P23S05A are available in two different configurations, as shown in the ordering information table. The ASM5P23SxxA-1 is the base part. The ASM5P23SxxA-1H is the high drive version of the -1 part and its rise and fall times are much faster than -1 part.