SY89875UMG-TR

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The SY89875UMG-TR is a cost-effectivedDR 2.5V and SSTL 2.5V differential output device from Symmetry Electronics, Inc. The SY89875UMG-TR is a low-skew, low-jitter, 1:2/2:2 differential output clock driver. It is optimized for use in DDR, SSTL and other applications requiring low-skew, low-jitter clock outputs.

The SY89875UMG-TR has two selectable 1:2 and 2:2 differential fan-out buffers, buffer enable, SSTL 2.5V and LVPECL single-ended output enable, and power-down enable pins. The SY89875UMG-TR is designed to be clocked from a SSTL 2.5V, DDR 2.5V, HCSL 2.5V, LVPECL 2.5V, LVDS 2.5V, or other source. The device exploits a superior clock-tree architecture for clock fanout and low-skew clock distribution among devices on a high-speed signaling bus.

The SY89875UMG-TR output enable feature may be used to enable/disable the outputs by applying an enable signal to the OEn pin. The OEn signal can be either SSTL2.5V or LVPECL single-ended logic. The SY89875UMG-TR supports an individual-pin power-down enable feature. This allows the user to power down each output independently.

The SY89875UMG-TR has an internal differential termination voltage generator to match the selected output transmission line impedance. The internal generator source provides very accurate current for the MEMS capacitive and on-chip in-line resistors, resulting in superior AC characteristic performance. This allows the SY89875UMG-TR to drive 50 Ohm and 75 Ohm high frequency transmission lines up to 3V.

The main features of the SY89875UMG-TR include: 2:2/1:2 fanout, internal differential termination voltage generator, low-skew, low-jitter outputs, individual power down enable, and support for DDR2.5V, SSTL2.5V, HCSL2.5V, LVDS2.5V and LVPECL2.5V outputs.

The SY89875UMG-TR is widely used in applications such as Network Equipment, Mass Storage, High-end Servers, Telecommunications, Digital Broadcasting, Video Editing and Processing, Automotive, and Aerospace. It is ideal for clock distribution networks, switching fabrics, synchronous transmission, and embedded clock buffering applications.

In terms of its working principle, the SY89875UMG-TR is designed to provide a differential output from a single-ended input. The device has two selectable 1:2 and 2:2 differential fan-out buffers, and each buffer uses an internal differential termination voltage generator to match the selected output transmission line impedance. The OEn signal enables or disables the outputs, allowing the user to power down each output independently. The device is optimized for low-jitter, low-skew applications and supports DDR2.5V, SSTL2.5V, HCSL2.5V, LVPECL2.5V, and LVDS2.5V outputs.

The SY89875UMG-TR from Symmetry Electronics, Inc. is thus a highly versatile and cost-effective clock buffer, driver, and transmitter for use in a variety of different application fields. It is optimized for low-jitter, low-skew applications and supports a wide range of high frequency transmission line impedances, making it ideal for clock distribution networks, switching fabrics, synchronous transmission, and embedded clock buffering applications.

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