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MC14028B Datasheet(PDF) 3 Page - Motorola, Inc |
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MC14028B Datasheet(HTML) 3 Page - Motorola, Inc |
3 / 7 page MOTOROLA CMOS LOGIC DATA 115 MC14028B SWITCHING CHARACTERISTICS* (CL = 50 pF, TA = 25_C) Characteristic Symbol VDD Min Typ # Max Unit Output Rise and Fall Time tTLH, tTHL = (1.5 ns/pF) CL + 25 ns tTLH, tTHL = (0.75 ns/pF) CL + 12.5 ns tTLH, tTHL = (0.55 ns/pF) CL + 9.5 ns tTLH, tTHL 5.0 10 15 — — — 100 50 40 200 100 80 ns Propagation Delay Time tPLH, tPHL = (1.7 ns/pF) CL + 215 ns tPLH, tPHL = (0.66 ns/pF) CL + 97 ns tPLH, tPHL = (0.5 ns/pF) CL + 65 ns tPLH, tPHL 5.0 10 15 — — — 300 130 90 600 260 180 ns * The formulas given are for the typical characteristics only at 25 _C. #Data labelled “Typ” is not to be used for design purposes but is intended as an indication of the IC’s potential performance. Figure 1. Dynamic Signal Waveforms Inputs B, C, and D switching in respect to a BCD code. Inputs A, B, and D low. All outputs connected to respective CL loads. f in respect to a system clock. 20 ns 20 ns 90% 50% 10% 1/f VDD VSS 20 ns 20 ns INPUT A INPUT C Q4 10% 90% 50% VDD VSS VOH VOL tPLH tPHL tTLH tTHL 50% 90% 10% |
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