SN65LVEL11DGK

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The SN65LVEL11DGK is a clock buffer and driver incorporated with a differential line receiver. It is a member of Texas Instruments’ Clock/Timing family of ControlLogic products, specifically categorized as Clock Buffers, Drivers. This device is offered in the 8-pin (SN65LVEL11DGK)SOIC and the 8-pin (SN65LVEL11DGKR)TSSOP packages. The SN65LVEL11DGK, conforming to the LVDS standards, is designed to operate up to 850Mbps nominal speed with a maximum input clock frequency of 1.5GHz.This device, with its integrated LVDS compatibility, provides three differential line-drivers, two with selectable slew rates for low-skew driving applications and one dedicated low-skew interfacing capability. It also integrates an LVDS-compliant receiver, which senses and latches the incoming differential voltage. The SN65LVEL11DGK is designed with a low power dissipation, which makes it suitable for mobile, portable, and battery-powered applications.

The SN65LVEL11DGK is primarily used to receive, drive, and buffer clock signals from LVDS source devices in various applications such as industrial, telecom, and broadcast. Furthermore, this device can also be used in clock-divider or phase-shifter circuits, as well as clock distribution applications in various end-user industries.

The SN65LVEL11DGK is compliant with the LVDS standards, making it ideal for applications requiring low-power, low-skew, and low-noise. Its LVDS drivers use a low-resistance, low-capacitive output stage providing an improved signal transmission capability. The drivers are also capable of delivering a minimum slew rate of 1.25V/ns, making it suitable for high-speed applications.

The SN65LVEL11DGK also incorporates an adjustable voltage threshold for improved noise immunity which avoids false triggering due to electromagnetic interference. This device supports asynchronous and synchronous applications. Its 2-wire serial LVDS (CP/CP) protocol allows synchronization of the clock and data transmission on the same pair of lines. This integration also provides multiple operating options that can be configured by adjusting a single resistor located in the circuit.

Regarding the operation, the SN65LVEL11DGK works in the following way. On the reception side, the LVDS receiver senses and latches the differential voltage from the input clock signal. Depending on the input threshold selected, the receiver senses the differential voltage and outputs the corresponding logic voltage levels. This logic voltage level is then forwarded to the output buffers using toggle registers, which convert the single-ended logic output from the receiver into differential LVDS logic (± 400mV). This differential signal is then transmitted at the output pins. On the driving side, the outputs consist of two high-speed drivers and one low-speed driver. The two high-speed drivers have a selectable slew rate while the dedicated low-speed driver offers low-skew interfacing.

In conclusion, the SN65LVEL11DGK is a versatile clock buffer and driver compliant with the LVDS standards. It is used in various applications such as telecom and broadcast, to provide low-power, low-noise, and low-skew data transmission. Additionally, its integration of a receiver and 2-wire protocol, allows for synchronous and asynchronous clock and data transmission on the same lines.

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