User`s guide

Introduction • 3
1.3 Specifications
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General Specification:
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Dimensions:
193.5 mm x 114 mm
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Bus:
PC-AT bus
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I/O port address:
Hex 200 - Hex 3FF
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Interrupt IRQ Level:
IRQ3 - IRQ15
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Digital Input:
• Input logic low voltage: Min. -0.5V, Max. 0.8V
• Input logic high voltage: Min. 2.0V, Max. 5.0V
• Input loading current: Max. 0.2 mA at 0.4V
• Input hysteresis: Typical 0.4V, Min. 0.2V
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Digital Output:
• Output logic low voltage (Sink): Max. 0.5V at 24mA
• Output logic high voltage (Source): Min. 2V at –15mA
• Driving Capacity: All inputs and outputs are TTL/DTL compatible.
Outputs will drive 1 standard TTL load (74 series) or 4 LSTTL (74LS)
loads
• Input hysteresis: Typical 0.4V, Min. 0.2V
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Programmable Counter:
•
Frequency:
4MHz
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Counter:
Device Number of counters
ACL-7120A/3 3
ACL-7120A/6 4