Pericom Semiconductor launches a family of 3.3 V, 1:4 LVPECL clock buffers with speeds up to 800 MHz. The PI6C4853x ICs target the networking/telecommunications, storage, and industrial system markets. PI6C48533-01 (Differential to LVPECL), PI6C48535-01 (LVCMOS to LVPECL), PI6C48535-11 (Crystal to LVPECL) are suitable solutions for solving translation requirements as well as eliminating jitter concerns. These products are differential clock converters with 4 pairs of LVPECL outputs. Each device has different input signals to convert and Fanout to four LVPECL outputs. In addition, each device offers a selection of two inputs for systems with fail safe and redundancy requirements. Some systems distribute a clock signal from board to board, so if the main system clock fails, the local (backup) clock will be switched over to continue the operation. All three devices are designed without PLLs in order to eliminate any possibility of injecting noise or jitter during conversion. A D-latch is also implemented to prevent any runt pulse when switching asynchronous clocks.
Pericom Semiconductor Corporation