Oops. Error! Correction: The 2532 Vpp is always +5V when reading, and would keep 2732 outputs always OFF. The 2532 has just one enable pin, while the 2732 has two. Better to tie 2732-20 to ***2532-20*** (or to GND - outputs would be always enabled when the chip is selected). Sorry 'bout that. Best of luck, Bob