Cat 28-R2

This is the description about Cat 28-R2 of the 5 tap leading edge control, precise delay modules.

When Cat 28-R2 test conditions are @ 25oC, the following data is available. Pulse voltage is 3.2 Volts. Rise time is 3.0 ns (10%-90%). Pulse width is 1.2 x total delay. Pulse period is 4 x pulse width. Supply current is 35 ma typical. Supply voltage is 5.0 Volts.

Here are the Cat 28-R2 tolerances. Input to output + 1 ns or 3%, unless otherwise specified, delays measured @ 1.5 V levels on Leading Edge only with 15pf loads on outputs rise and fall times measured from 0.75 V to 2.4 V levels.

The Cat 28-R2 electrical characteristics are these. Supply voltage is from 4.75 to 5.25 V. Logic 1 input voltage is 2.0 V.  Logic 0 input voltage is 0.8 V. Logic 1 output current is -1 mA. Logic 0 output current is 20 mA. Logic 1 output voltage is 2.7 V. Logic 0 output voltage is 0.5 V. Input clamp voltage is -1.2 V. Logic input current is 20 ua. Logic 0 input current is -0.6 mA. Short circuit output current is from -60 to -150 mA. Cat 28-R2 Logic 1 supply current is 40 mA. Logic 0 supply current is 90 mA. Operating free air temperature is from 0 to 70. Min. input pulse width of total delay is 100%. Maximum duty cycle is 50 %. Temp. coeff. of total delay (TD ) is 100 + (25000/TD) PPM/.

These are the Cat 28-R2 notes: Transfer molded for better reliability; Compatible with TTL & DTL circuits; Terminals: Electro-Tin plate phosphor bronze; Performance warranty is limited to specified parameters listed; SMD - Tape & Reel available: 24mm Wide x 12mm Pitch, 750 pieces per 13" reel.

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