DS16149

www.DataSheet4U.com DS16149 DS36149 DS16179 DS36179 Hex MOS Drivers February 1986 DS16149 DS36149 DS16179 DS36179 Hex MOS Drivers General Description The DS16149 DS36149 and DS16179 DS36179 are Hex MOS drivers with outputs designed to drive large capacitive loads up to 500 pF associated with MOS memory systems PNP input transistors are employed to reduce input currents allowing the large fan-out to these drivers needed in memory systems The circuit has Schottky-clamped transistor logic for minimum propagation delay and a disable control that places the outputs in the logic ‘‘1’’ state (see truth table) This is especially useful in MOS RAM applications where a set of address lines has to be in the logic ‘’1’’ state during refresh The DS16149 DS36149 has a 15 X resistor in series with the outputs to dampen transients caused by the fast-switching output The DS16179 DS36179 has a direct low impedance output for use with or without an external resistor Features Y Y Y High speed capabilities  Typ 9 ns driving 50 pF  Typ 29 ns driving 500 pF Built-in 15 X damping resistor (DS16149 DS36149) Same pin-out as DM8096 and DM74366 Schematic Diagram TL F 7553 – 1 C1995 National Semiconductor Corporation TL F 7553 RRD-B30M105 Printed in U S A Absolute Maximum Ratings (Note 1) If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage Logical ‘‘1’’ Input Voltage Logic...