74LS273 Datasheet | National Semiconductor

Description The ’LS273 is a high speed 8-bit register consisting of eight D-type flip-flops with a mon Clock and an asynchronous active LOW Master Reset This device is supplied in a 20pin package featuring 0 3 inch row spacing Features Edge-triggered 8-bit high speed register Parallel in and out mon clock and master reset Connection Diagram Dual-In-Line Package TL F 9825 - 1 Order Number DM54LS273E DM54LS273J DM54LS273W DM74LS273M or DM74LS273N See NS Package Number E20A J20A M20B N20A or W20A Pin Names CP D0- D7 MR Q0- Q7 Description Clock Pulse Input (Active Rising Edge) Data Inputs Asynchronous Master Reset Input (Active LOW) Flip-Flop Outputs C1995 National Semiconductor Corporation TL F 9825 RRD-B30M115 Printed in U S A Absolute Maximum Ratings (Note) If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage 7V Input Voltage 7V Operating Free Air Temperature Range b 55 C to a 125 C DM54LS DM74LS 0 C to a 70 C b 65 C to a 150 C Storage Temperature Range Note The ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaranteed The device should not be operated at these limits The parametric values defined in the ‘‘Electrical Characteristics’’ table are not guaranteed at the absolute maximum ratings The ‘‘Remended Operating Conditions’’ table will define the conditions for actual device operation Remended Operating Conditions Symbol VCC VIH VIL IOH IOL TA ts(H) ts(L) th(H) th(L) tw(H) tw(L) tw(L) trec Parameter Min Supply Voltage High Level Input Voltage Low Level Input Voltage High Level Output Current Low Level Output Current Free Air Operating Temperature Setup Time HIGH or LOW Dn to CP Hold Time HIGH or LOW Dn to CP CP Pulse Width HIGH or LOW MR Pulse Width LOW Recovery Time MR to CP b 55 DM54LS273 Nom 5 Max 55 Min 4 75 2 07 b0 4 DM74LS273 Nom 5 Max 5 25 Units V V 08 b0 4 45 2 V m A m A C...