IDT49FCT805BTPY

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Clock/Timing - Clock Buffers, Drivers

The IDT49FCT805BTPY is part of IDT\'s 49FCT series of low-power, low-skewing clock products. The “BTPY” stands for “bus transceiver, PCI system”, indicating that it is a multi-purpose device that supports both PCI systems and bus transceivers. This device has applications in asynchronous clock buffering, source synchronous clocking, as well as PCI-express clocking.

The IDT49FCT805BTPY has two independent input/output buffers per channel: one channel is I/O buffer, while the other is a low-skew clock buffer. In asynchronous buffering mode the devices will accept a tamed input clock (with 50/50 duty cycle) and output two copies of the clock with either one-to-one or two-to-one duty cycle. In source synchronous mode, the device can accept a received data (CA bundle) and output two copies of the received clock with either one-to-one or two-to-one duty cycle.

In terms of PCB layout, the IDT49FCT805BTPY has a wide range of benefits. It is designed with on-chip termination and PCB trace length matching to minimize clock skew and jitter among outputs. The termination is adjusted through on-chip trimming, which helps to accommodate the board layout constraints of high-speed designs. The device also provides for 6.25ns of delay for all outputs, which provides excellent de-skew capability when used in high-speed, tightly-timed systems.

The IDT49FCT805BTPY is also designed with a variety of power-down modes, which can help reduce overall system power consumption. The low-power versions support 2.0mA and 1.8mA power absorption while in active and standby mode, respectively. The ultra-low-power version supports 1.2mA and 1.0mA power absorption in active and standby modes, respectively, thereby offering improved power-down efficiency.

Overall, the IDT49FCT805BTPY is an excellent choice for applications that require low-skew buffered clock sources for synchronous operation. Its advantages include low power consumption, on-chip termination, as well as wide range of input and output configurations. Additionally, its on-chip trimmable termination makes it well suited for applications where PCB layout constraints must be taken into consideration.

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