DM74S473

DM74S473 (512 x 8) 4096-Bit TTL PROM November 1990 DM74S473 (512 x 8) 4096-Bit TTL PROM General Description This Schottky memory is organized in the popular 512 words by 8 bits configuration A memory enable input is provided to control the output states When the device is enabled the outputs represent the contents of the selected word When disabled the 8 outputs go to the ‘‘OFF’’ or high impedance state PROMs are shipped from the factory with lows in all locations A high may be programmed into any selected location by following the programming instructions Features Y Y Y Y Y Y Advanced titanium-tungsten (Ti-W) fuses Schottky-clamped for high speed Address access 45 ns max Enable access 30 ns max Enable recovery 30 ns max PNP inputs for reduced input loading All DC and AC parameters guaranteed over temperature Low voltage TRI-SAFETM programming Open-collector outputs Block Diagram TL D 9715 – 1 Pin Names A0–A8 G GND Q0–Q7 VCC Addresses Output Enable Ground Outputs Power Supply TRI-SAFETM is a trademark of National Semiconductor Corporation C1995 National Semiconductor Corporation TL D 9715 RRD-B30M105 Printed in U S A Connection Diagrams Dual-In-Line Package Plastic Leaded Chip Carrier (PLCC) TL D 9715–2 TL D 9715 – 3 Top View Order Number DM74S473J 473AJ DM74S473N or 473AN See NS Package Number J20A or N20A Top View Order Number DM74S473V or 473AV See NS Package Number V20A Ordering Information Commercial Temp Range (0 C to a 70 C) Parameter Order Number DM7...