A-3
DM5806 Characteristics
Typical @ 25° C
Interface
Switch-selectable base address, I/O mapped
Jumper-selectable interrupts
Digital I/O........................................................................................ CMOS 82C55
Opto-22 compatible
Number of lines ..........................................................................................................24
Logic compatibility ....................................................................................... TTL/CMOS
(Configurable with optional I/O pull-up/pull-down resistors)
High-level output voltage ................................................................................ 4.2V, min
Low-level output voltage.............................................................................. 0.45V, max
High-level input voltage ................................................................ 2.2V, min; 5.5V, max
Low-level input voltage ................................................................ -0.3V, min; 0.8V, max
High-level output current, Isource ..................................... CMOS buffer: -12 mA, max;
TTL buffer: -16 mA, max
Low-level output current, Isink............................................ CMOS buffer: 24 mA, max;
TTL buffer: 64 mA, max
Input load current ............................................................................................... ±10 μA
Input capacitance ................................................................................................. 10 pF
Input capacitance,
C(IN)@F=1MHz................................................................................................. 10 pF
Output capacitance,
C(OUT)<@F=1MHz .......................................................................................... 20 pF
Timer/Counters .............................................................................. CMOS 82C54
Three 16-bit down counters
6 programmable operating modes
Counter input source .................................................... External clock (8 MHz, max) or
on-board 8 MHz clock
Counter outputs .......................................... Available externally; used as PC interrupts
Counter gate source ................................................... External gate or always enabled
Current Requirements
194 mA @ +5 volts
Connectors
P2 — 50-pin right angle header
P6 — 20-pin right angle header
Size
3.55"L x 3.775"W x 0.6"H (90mm x 96mm x 16mm)