DS21600SN

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The DS21600SN is a monolithic device desgined to generate frequency sources for a wide variety of high speed clocking applications. It employs two independent flexible synthesizers to construct arbitrary frequencies in two normally complementary outputs. Operating from a low voltage supply, this family of parts is capable of producing frequencies from 2.4MHz to over 1GHz.

The DS21600SN has two independent synthesizers, each with a 24-bit resolution frequency control register. The reference frequency is programmable by a digital frequency control word. The two internal synthesizers allow for independent digital or analog control of multiple clocking outputs. Clocking outputs can be generated in phase, non-phase and non-overlapping configurations, allowing one to design flexible phase and frequency applications.

The DS21600SN can be programmed up to 1GHz. Both synthesizers can be programmed with any frequency, providing precise, frequency doubler and halve outputs for applications such as clock and data conversion or symmetrical expansion. There is also an independent programmable Ramp/Level output. The onchip pFET gates also allow for flexible output sequence and timing applications.

The device provides an integrated set of clocking features such as frequency multplexing, non-overlapping clock generation and pulse width modulation, which can be used to improve system user interface and control. Furthermore, the integrated digital control loop enables accurate and precise frequency regulation, resulting in improved circuit performance in high-speed systems.

The DS21600SN also includes an On-Chip Voltage Control Oscillator (VCO) with a frequency range of 10KHz to 400MHz. The integrated VCO has been designed to provide a wide range of capability by eliminating the need to use external components. The output frequency range is programmable from 2.4MHz to 1GHz and uses a 6-bit resolution frequency control word. The VCO can be configured to run in two modes, with the frequency control word selecting either a \'\'fixed frequency\'\' or a \'\'Modeset\'\' value.

The DS21600SN also features a low jitter and wide voltage range PLL. The PLL employs different types of frequency synthesizer designs to provide clock multiplication and division. The device uses Phase Locked Loop (PLL)/Frequency Locked Loop (FLL) architectures to provide programmable frequency combinations and can also be used to obtain frequency synthesis with fine resolution. The device uses a 24-bit control word and the output frequencies can be spread spectrum modulated. The device can also be programmed to provide multi-phase, multi-half-speed, and all zero-delay clock outputs.

The DS21600SN also includes an On-Chip Cascade Interconnect feature, which allows multiple I/O devices to be cascaded in order to provide high bandwidth and lower jitter performance. The device includes a programmable bypass switch which enables high-speed signal routing between the devices, eliminating the need for external buffers, resulting in better signal integrity. The device also provides for synchronization control, enabling multiple clock inputs to be routed to different outputs.

In summary, the DS21600SN is an ideal choice for providing frequency sources to a wide variety of high-speed clocking applications. Its on-chip features enable many features such as frequency multiplexing, non-overlapping clock generation, pulse width modulation and frequency synthesis. Furthermore, the wide range of frequency programmability and sophisticated on-chip control loop allows for improved system performance in high-speed applications.

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