A new beam position monitor digitizer module has been designed, tested and tuned up at the SLAC. This module, the electron-positron beam position monitor (or epBPM), measures position of single electron and positron bunches for the SLC LINAC and PEP-II injection lines and final focus. The required dynamic range is fron 5 \cdot 10^8 to 10^11 particles per bunch (46 dB). The pulse-to-pulse resolution is less than 2 m for 5 \cdot 10^10 particles per bunch for the 12 cm long striplines, covering 30^circ at 9 mm radius. The epBPM module has been made in CAMAC standard, single width slot. Four epBPM inputs are split for eight signal processing channels to catch two bunches, first -- the positron, then the electron bunch in one cycle of measurements. The signal processing channels bandwidth is 40 MHz. Minimum electron and positron bunch is 60 ns. The epBPM has internal and external trigger modes of operations. The internal mode has two options -- with or without external timing, catching only first bunch in the untimed mode. The epBPM has on-board calibration circuit for measuring gain of the signal processing channels and for timing scan of on board digital delays to synchronize the trigger and the signal's peak. There is a mode for pedestal measurements. The epBPM has 3.6 mu s conversion time. Show Partial Abstract