The inputs are compatible with 5 V and 12 V logic systems--TTL, Schottky TTL, DTL, PMOS, and CMOS. In all cases, the output is switched ON by an active high input level. The UDN2987A is supplied in a 20-pin dual in-line plastic package; the UDN2987LW is supplied in a 20-lead small-outline plastic package.