DS1649 Datasheet | National Semiconductor

Description The DS1649 DS3649 and DS1679 DS3679 are Hex TRI-STATE MOS drivers with outputs designed to drive large capacitive loads up to 500 p F 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 Schottkyclamped transistor logic for minimum propagation delay and TRI-STATE outputs for bus operation The DS1649 DS3649 has a 15X resistor in series with the outputs to dampen transients caused by the fast-switching TRI-STATE is a registered trademark of National Semiconductor Corp output The DS1679 DS3679 has a direct low impedance output for use with or without an external resistor Features High speed capabilities Typ 9 ns driving 50 p F Typ 30 ns driving 500 p F TRI-STATE outputs for data bussing Built-in 15X damping resistor (DS1649 DS3649) Same pin-out as DM8096 and DM74366 Schematic Diagram Truth Table Disable Input DIS 1 0 0 0 1 1 DIS 2 0 0 1 0 1 0 1 X X X 1 0 Hi-Z Hi-Z Hi-Z Input Output X e Don’t care Hi-Z e TRI-STATE mode DS1649 DS3649 only TL F 7515 - 1 Connection Diagram Dual-In-Line Package Typical Application TL F 7515 - 2 Top View Order Number DS1649J DS3649J DS1679J DS3679J DS3649N or DS3679N See NS Package Number J16A or N16A C1995 National Semiconductor Corporation TL F 7515 TL F 7515 - 3 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 Logical ‘‘0’’ Input Voltage Storage Temperature Range Maximum Power Dissipation at 25 C Cavity Package Molded Package Lead Temperature (Soldering 10 sec ) 7 0V 7 0V b 1 5V b 65 C to a 150 C Operating Conditions Supply Voltage (VCC Temperature (TA) DS1649 DS1679 DS3649 DS3679 Min 45 b 55 Max 55 a 125 a 70 Units V C C Derate cavity package 9 1 m W C above...