Device ROM (KB) Z86E30 4 Z86E31 2 Z86E40 4 Note: *General-Purpose RAM* (Bytes) 237 125 236 I/O Lines 24 24 32 Speed (MHz) 16 16 16 s Standard Temperature (VCC = 3.5V to 5.5V) s Extended Temperature (VCC = 4.5V to 5.5V) s Available Packages: 28-Pin DIP/SOIC/PLCC OTP (Z86E30/31 only) 40-P.