Models 2601B, 2602B and 2604B System SourceMeter Instrument Specifications
Specifications are subject to change without notice
SPEC-2602B Rev. B / February 2014 13 of 13
Digital I/O interface
25
Connector: 25-pin female D
Input/output pins: 14 open drain I/O bits
Absolute maximum input voltage: 5.25 V
Absolute minimum input voltage: -0.25 V
Maximum logic low input voltage: 0.7V, +850 µA max
Minimum logic high input voltage: 2.1 V, +570 µA
Maximum source current (flowing out of digital I/O bit): +960 µA
Maximum sink current at maximum logic low voltage (0.7 ): -5.0 mA
Absolute maximum sink current (flowing into digital I/O pin: -11 mA
5 V power supply pins: Limited to 250 mA total, solid-state fuse protected
Output Enable: Active high input pulled down internally to ground with a 10 kΩ resistor;
when the output enable input function has been activated, each SourceMeter
channel will not turn on unless the output enable pin is driven to > 2.1 V (nominal
current = 2.1 V / 10 kΩ = 210 µA).
25
The Digital I/O feature is not available with the Model 2604B. Only +5 V, GND and INTERLOCK pins are available with the Model 2604B
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