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55
Specifications
Computer Host Interface
Base Address:
Switchable from 0 to 17FFh on 32 Word boundaries
Bus Type:
AT, ISA or EISA
I/O Wait States: 0, 2, 4, or 8 Jumper selectable.
Number of Registers:
Thirty Two 16-bit Registers
Word size:
16 bits
Word transfer Rate: 10Mhz max (depends on computer and program)
Interrupts:
Software selectable from IRQ2, 3, 7, 10, 11, 12, 15
Optically Isolated Inputs
Input voltage:
0 to 3V logical low
3.1V to 24V logical high
Max reverse voltage:
400V peak
Max input current:
1A peak
30mA continuous
LED:
Forward Voltage:
1.15V (typ), 1.5V (max) [I
f
=10mA]
Reverse Current:
100
µ
A (max) [V
r
= 3V]
Capacitance:
30pF (typ) [V=0, f=1MHz]
Photo Transistor:
DC Forward Current Gain:
200 (typ) [V
ce
=5V, I
c
=500
µ
A]
C-E Breakdown Voltage:
30V (min) [I
c
=1mA, I
f
= 0]
E-B Breakdown Voltage: 70V (min) [I
c
=500
µ
A]
E-C Breakdown Voltage:
7V (min) [I
e
=100
µ
A]
Collector Dark Current:
1nA (typ), 50nA (max) [V
ce
=10V]
Coupled:
Current Transfer Ratio:
20% (min), 100% (typ) [I
f
=10mA, V
ce
=10V]
C-E Saturation Voltage:
0.1V (typ), 0.5V (max) [I
f
=50mA, I
c
=2mA]
Capacitance Input to Output:
0.8pF [V
s
=0V, f=1MHz]
Isolation Resistance:
10
11
Ω
[V
s
=500V]
Isolation Voltage:
2500Vrms [VAC, 1 minute] (Toshiba)
Rise/Fall time:
2
µ
s [V
ce
=10V, I
cb
=50
µ
A, R
l
=100
Ω
]