ICS651BMLF

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The ICS651BMLF is a highly integrated MOSFET clock driver integrated circuit (IC) designed to provide both frequency translation and amplification of a low-voltage input clock signal to a higher-voltage, higher-power output signal. It is a single-chip solution for applications requiring board-level synchronization or “clock distribution”, meaning a clock signal sent to several synchronous systems on a board. The ICS651BMLF is specialized for use in such clock distribution applications and is ideal for driving multiple flip-flop and logic components in any system needing up to 125MHz of clock frequency.The ICS651BMLF clock driver IC supports an input clock range from 1MHz to 125MHz, with low voltage operation from 2.5V to 5V. This allows for fanouts of up to 16 repetitions of the input clock signal to be produced for as low as 25 μA of supply current.

The ICS651BMLF is designed to deliver exceptional signal integrity and characteristics. It features a low propagation delay of ~30–500ns, plus a wide signal amplitude range that can be individually adjusted to compensate for signal-dependent loading at the system level. In addition, the ICS651BMLF offers excellent power consumption, with a nominal supply current of only 30mA. The ICS651BMLF also includes a ‘Power’ pin that enables the user to control the driver’s output power level to reduce power consumption further, as well as a ‘Bypass’ pin that allows the user to disable the driver’s circuit if needed.

The ICS651BMLF architecture is designed to enable true 3.3V and 5V clock driving through a single chip. As a result, it is much more efficient and cost-effective than using discrete clock buffers, which usually require multiple chips to deliver the same level of performance. The ICS651BMLF also provides a low output impedance of 250Ω or 1000Ω, which eliminates the need for external termination resistors when connecting the device to an oscilloscope.

The ICS651BMLF supports several different output configurations. The first is a “zero-delay” mode, which is designed specifically for true 1:1 frequency multiplication of the input clock signal. In this mode, the device replicates the exact input signal, including frequency, amplitude, and shape. The second output configuration is a “comparator output”, which is designed for frequency multiplication by up to 8x. This mode utilizes a voltage comparator to produce a square wave output with the same frequency as the input clock signal.

Finally, the device also supports a “fifty-fifty output” configuration, which is intended for applications requiring close-toppings of the input signal. In this mode, the device produces an output signal that is a fifty-fifty blend of the input and reference signals, providing a high-frequency output signal and enhanced accuracy in timing applications.

In short, the ICS651BMLF is a compact and highly-integrated clock driver IC optimized for applications requiring board-level synchronization or “clock distribution”. It is designed to provide superior signal integrity and characteristics, in addition to low power consumption and cost-effective 3.3V and 5V operation. It supports several different output configurations and is ideal for driving multiple flip-flop and logic components in any system needing up to 125MHz of clock frequency. With its combination of performance and features, the ICS651BMLF provides users with a versatile and cost-effective solution for clock distribution applications.

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