General Description
The 331 contains a diode array with the proper characteristics for use on the expander inputs of HiNIL logic devices. In addition, the chip provides two pullup resistors that allow each diode array to be used as a second-level AND gate.

FEATUREs
● PROVIDES 5 ADDITIONAL INPUTS TO EXPANDABLE GATES, BUFFERS AND OTHER HiNIL DEVICES
● OPTIONAL PULLUP RESISTORS FOR SECOND-LEVEL GATING