MICROCHIP SY100EL90VZI

The SY100EL90V is a triple ECL/LVECL to PECL/LVPECL translator. The device can translate between all power supply voltage combinations: -5V ECL to 5V PECL, -5V ECL to 3.3V LVECL, -3.3V LVECL to 5V PECL, or -3.3V LVECL to 3.3V LVECL. A VBB output is provided for interfacing with single-ended ECL signals at the input. To use single-ended inputs, the VBB output should be connected to the D̄ (D-bar) input. The active signal then drives the D input. When in use, the VBB output should be bypassed to ground through a 0.01μF capacitor. The VBB output is designed to serve as the switching reference for the EL90V under single-ended input switching conditions. Therefore, this pin can only source/sink a maximum of 0.5mA. To achieve level translation, the EL90V requires three supply rails. The VCC supply should be connected to the positive supply, and the VEE pin should be connected to the negative supply. As expected, the GND pin connects to the system ground plane. Both VEE and VCC should be bypassed to ground through 0.01μF capacitors. With the input open, the D̄ input will be biased at VCC/2 and the D input will be pulled to VEE. This condition will force the Q output low, ensuring stability.

• 3.3V and 5V supply options
• 500ps propagation delay
• Fully differential design
• Standard and low-voltage operation support
• 20-pin SOIC package