![background image](http://html2.mh-extra.com/html/keithley/system-sourcemeter-2601b/system-sourcemeter-2601b_instrument-specifications_4047500013.webp)
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 i
nternally 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