74LS273

DM74LS273 8-Bit Register with Clear October 1988 Revised March 2000 DM74LS273 8-Bit Register with Clear General Description The DM74LS273 is a high speed 8-bit register, consisting of eight D-type flip-flops with a common Clock and an asynchronous active LOW Master Reset. This device is supplied in a 20-pin package featuring 0.3 inch row spacing. Features s Edge-triggered s 8-bit high speed register s Parallel in and out s Common clock and master reset Ordering Code: Order Number DM74LS273WM DM74LS273SJ DM74LS273N Package Number M20B M20D N20A Package Description 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Logic Symbol Connection Diagram VCC = Pin 20 GND = Pin 10 Pin Descriptions Pin Names CP D0–D7 MR Q0–Q7 Data Inputs Asynchronous Master Reset Input (Active LOW) Flip-Flop Outputs Description Clock Pulse Input (Active Rising Edge) Truth Table Inputs MR L H H H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Outputs Dn X H L Qn L H L CP   X © 2000 Fairchild Semiconductor Corporation DS009825 www.fairchildsemi.com DM74LS273 Functional Description The DM74LS273 is an 8-bit parallel register with a common Clock and common Master Reset. When the MR input is LOW, the Q outputs are LOW, ind...