These devices are controlled through a 20MHz SPITM/QSPITM/MICROWIRETM-compatible 3-wire serial interface. Immediate Update Mode allows any channel's output to be updated within 20s. Burst Mode allows multiple values to be loaded into memory in a single, high-speed data burst. All channels are updated within 330s after data has been loaded. Each device features an output clamp and output resistors for filtering. The MAX5631 features a 50 output impedance and is capable of driving up to 250pF of output capacitance. The MAX5632 features a 500 output impedance and is capable of driving up to 10nF of output capacitance. The MAX5633 features a 1k output impedance and is capable of driving up to 10nF of output capacitance.