Type: Integrated Chip
Model: UM6522
Part No.: 8842S

Features:
-Two 8 bi-directional I/O ports
-Two 16-bit programmable timer/counters
-Serial data port
-Single +5V power supply
– TTL compatible except Port A
-CMOS compatible peripheral Port A lines
-Latched input and output registers
– 1 MHz and 2 MHz Operation
Absolute maximum rating:
Supply voltage: 8 V
Operating voltage range: 4 … 7 V
Input voltage: -2 … 6.5 V
Max. power dissipation: 1 W
Operating Temperature: 0 … 70°C