NI 9401 8-Channel, 100 ns, TTL Digital Input/Output Module (779351-01)

• 8 DIO channels
• Default power-on line direction

Input

Input/output type

• TTL, single-ended

Digital logic levels
Input Voltage

• 5.25 V maximum

High, VIH

• 2 V minimum

Low, VIL

• 0.8 V maximum

Output High, VOH (5.25 V maximum)

• Sourcing 100 μA
• 4.7 V minimum
• Sourcing 2 mA
• 4.3 V minimum

Output Low, VOL

• Sinking 100 μA
• 0.1 V maximum
• Sinking 2 mA
• 0.4 V maximum

Maximum signal switching frequency, per channel
Input

• 8 input channels
• 9 MHz
• 4 input channels
• 16 MHz
• 2 input channels
• 30 MHz

Output

• 8 output channels
• 5 MHz
• 4 output channels
• 10 MHz
• 2 output channels
• 20 MHz

I/O propagation delay

• 100 ns maximum

I/O pulse width distortion

• 10 ns

Input current (0 V ≤ VIN ≤ 4.5 V )

• ±250 μA

Input capacitance

• 30 pF

Input rise/fall time

• 500 ns maximum

Overvoltage protection, channel-to-COM

• ±30 V maximum on one channel at a time