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MM74C925 Datasheet(PDF) 4 Page - Fairchild Semiconductor |
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MM74C925 Datasheet(HTML) 4 Page - Fairchild Semiconductor |
4 / 8 page www.fairchildsemi.com 4 AC Electrical Characteristics (Note 3) TA = 25°C, CL = 50 pF, unless otherwise noted Note 3: AC Parameters are guaranteed by DC correlated testing. Note 4: Capacitance is guaranteed by periodic testing. Typical Performance Characteristics Typical Segment Current vs Output Voltage Note: VD = Voltage across digit driver Maximum Power Dissipation vs Ambient Temperature Typical Average Segment Current vs Segment Resistor Value Symbol Parameter Conditions Min Typ Max Units fMAX Maximum Clock Frequency VCC = 5V, Tj = 25°C2 4 MHz Square Wave Clock Tj = 100°C1.5 3 MHz tr, tf Maximum Clock Rise or Fall Time VCC = 5V 15 µs tWR Reset Pulse Width VCC = 5V Tj = 25°C 250 100 ns Tj = 100°C 320 125 ns tWLE Latch Enable Pulse Width VCC = 5V Tj = 25°C 250 100 ns Tj = 100°C 320 125 ns tSET(CK, LE) Clock to Latch Enable Set-Up Time VCC = 5V Tj = 25°C 2500 1250 ns Tj = 100°C 3200 1600 ns tLR Latch Enable to Reset Wait Time VCC = 5V Tj = 25°C0 −100 ns Tj = 100°C0 −100 ns tSET(R, LE) Reset to Latch Enable Set-Up Time VCC = 5V Tj = 25°C 320 160 ns Tj = 100°C 400 200 ns fMUX Multiplexing Output Frequency VCC = 5V 1000 Hz CIN Input Capacitance Any Input (Note 4) 5 pF |
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