Specifications

HP 54645D Digital Channels
Number of Channels 16 Digital—labeled D0-D15
Threshold Selections D0-D7, D8-D15
Maximum Input Voltage ± 40 V peak
Threshold Range ± 6.0 V in 50-mV increments
Threshold Accuracy
1
±(100 mV + 3% of threshold setting)
Input Dynamic Range ± 10 V about threshold
Minimum Input Voltage Overdrive Greater of 250 mV or 30% of input amplitude.
Assumes threshold accuracy is perfect.
Input voltage ≥ (threshold value + 30% * Input
Voltage) when threshold > 0.84 V or < -0.84 V.
Minimum Input Voltage Swing 500 mV peak-to-peak
Input Capacitance ~8 pF
Input Resistance 100 k Ω, ± 2% at probe tip
Channel-to-Channel Skew 2 ns typical, 3 ns maximum
Predefined Thresholds TTL=1.4 V, CMOS=2.5 V, ECL=-1.3V
Cable Specifications Input Z 100 kΩ, ~8 pF, maximum input ± 40 V
1
Performance specification, tested by threshold test. See “Testing, Adjusting, and Troubleshooting.”
Performance Characteristics
HP 54645D Digital Channels
9-4