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CML Differential IO - TSMC CLN6FF
Analog Bits’ CML to HCSL Differential IO Buffer macros provide a low noise, high performance differential output clock that is compatible with HCSL (Host Controller Signal Level) timing applications. The output buffer design implements a current steering logic differential driver which provides a standard voltage output differential (VOD) up to 700mV for support of PCI-Express clocking solutions. The differential input buffer can also be used for receiving a reference clock in a PCI-Express PHY application. The core side signals are CML to allow transmission on-chip with low deterministic jitter.
The IO buffer is implemented in Analog Bits’ proprietary architecture that uses core and 1.8V IO devices. There are no power-up/power-off sequence restrictions on the Core (0.75V) and IO (1.8V) supplies although datasheet functionality are only valid with all power supplies and control signals with normal operating ranges. The IO buffer is designed as a bi-direction IO but not intended for dynamic IO configuration.
The IO buffers include VDD and VD18 power detectors, which automatically shut down the macro when either rail is not up. An aPowerGood control pin is also implemented to manually power off the macro when any power supply is not stable.
The IO buffers are presented as two macros, an actual IO buffer which can be instantiated multiple times, and reference cell that generates the reference voltages/currents required by IO buffer in transmit mode. Connections between the macros are achieved by abutment.
The IO buffer is implemented in Analog Bits’ proprietary architecture that uses core and 1.8V IO devices. There are no power-up/power-off sequence restrictions on the Core (0.75V) and IO (1.8V) supplies although datasheet functionality are only valid with all power supplies and control signals with normal operating ranges. The IO buffer is designed as a bi-direction IO but not intended for dynamic IO configuration.
The IO buffers include VDD and VD18 power detectors, which automatically shut down the macro when either rail is not up. An aPowerGood control pin is also implemented to manually power off the macro when any power supply is not stable.
The IO buffers are presented as two macros, an actual IO buffer which can be instantiated multiple times, and reference cell that generates the reference voltages/currents required by IO buffer in transmit mode. Connections between the macros are achieved by abutment.
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