The VSC7640 is a high-performance, four-channel VCSEL driver array designed to operate up to 3.125 Gbps for use in 10 Gbps Very Short Reach (VSR) parallel module applications. This device provides four individual VCSEL driver channels, a serial programmable interface temperature sensor for each channel, a temperature sensor, an overcurrent sensor and control for each channel, and monitoring logic for eye safety shutdown and power-on reset. The VSC7640 is designed to interface to a four-channel VCSEL array and to work in conjunction with a microcontroller. Unlike other competitive solutions the VSC7640 features a programmable negative peaking control to compensate for VCSEL slow tail currents. The VSC7640 is a die-level product that is fully tested at the maximum operating speed to guarantee performance and module manufacturing yields.