DM74LS395

DM74LS395 4-Bit Shift Register with TRI-STATE Outputs February 1992 DM74LS395 4-Bit Shift Register with TRI-STATE Outputs General Description The LS395 is a 4-bit shift register with TRI-STATE outputs and can operate in either a synchronous parallel load or a serial shift-right mode as determined by the Select input An asynchronous active LOW Master Reset (MR) input overrides the synchronous operations and clears the register An active LOW Output Enable (OE) input controls the TRISTATE output buffers but does not interfere with the other operations The fourth stage also has a conventional output for linking purposes in multi-stage serial operations Features Y Y Y Y Shift right or parallel 4-bit register TRI-STATE outputs Input clamp diodes limit high speed termination effects Fully CMOS and TTL compatible Connection Diagram Dual-In-Line Package Logic Symbol TL F 9833 – 2 TL F 9833 – 1 VCC e Pin 16 GND e Pin 8 Order Number DM74LS395WM or DM74LS395N See NS Package Number M16B or N16E Mode Select Table Operating Mode Asynchronous Reset Shift SET First Stage Shift RESET First Stage Parallel Load L H H H Inputs MR CP tn Outputs O1 tn a 1 O2 O3 S DS Pn O0 X H L X X X L H X X K L K L K H L L L O0n O1n 02n X L O0n O1n 02n Pn P0 P1 P2 P3 tn tn a 1 e Time before and after CP HIGH-to-LOW transition H e HIGH Voltage Level L e LOW Voltage Level X e Immaterial TRI-STATE is a registered trademark of National Semiconductor Corporation C1995 National Semiconductor Corporation...