74LS194A

54LS194A DM74LS194A 4-Bit Bidirectional Universal Shift Register June 1989 54LS194A DM74LS194A 4-Bit Bidirectional Universal Shift Register General Description This bidirectional shift register is designed to incorporate virtually all of the features a system designer may want in a shift register they feature parallel inputs parallel outputs right-shift and left-shift serial inputs operating-mode-control inputs and a direct overriding clear line The register has four distinct modes of operation namely Parallel (broadside) load Shift right (in the direction QA toward QD) Shift left (in the direction QD toward QA) Inhibit clock (do nothing) Synchronous parallel loading is accomplished by applying the four bits of data and taking both mode control inputs S0 and S1 high The data is loaded into the associated flipflops and appear at the outputs after the positive transition of the clock input During loading serial data flow is inhibited Shift right is accomplished synchronously with the rising edge of the clock pulse when S0 is high and S1 is low Serial data for this mode is entered at the shift-right data input When S0 is low and S1 is high data shifts left synchronously and new data is entered at the shift-left serial input Clocking of the flip-flop is inhibited when both mode control inputs are low Features Y Y Y Y Parallel inputs and outputs Four operating modes Synchronous parallel load Right shift Left shift Do nothing Positive edge-triggered clocking Direct overriding clear Connection Diagram Dual-In-Line Package TL F 6407 – 1 Order Number 54LS194ADMQB 54LS194AFMQB 54LS194ALMQB DM74LS194AM or DM74LS194AN See NS Package Number E20A J16A M16A N16E or W16A C1995 National Semiconductor Corporation TL F 6407 RRD-B30M105 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 54LS DM74LS 0 C to a 70 C Storage Temperature Range b 65 C to a 150 C 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 ‘‘Recommended Operating Conditions’’ table will define the conditions for actual device operation Recommended Operating Conditions Symbol VCC VIH VIL IOH IOL fCLK tW tSU tH tREL TA Parameter Min Supply Voltage High Level Input Voltage Low Level Input Voltage High Level Output Current Low Level Output Current Clock Frequency (Note 1) Clock Frequency (Note 2) Pulse Width (Note 3) Setup Time (Note 3) Hold Time (Note 3) Clear Release Time (Note 3) Free Air Operating Temperature Clock Clear Mode Data 30 22 17 12 25 16 0 18 b 55 54LS194A Nom 5 Max 55 07 b0 4 DM74LS194A Min 4 75 2 08 b0 4 Units Max 5 25 V V V mA mA MHz ns ns ns ns 70 C Nom 5 45 2 4 0 0 0 20 20 30 20 0 25 125 0 8 25 20 Note 1 CL e 15 pF TA e 25 C and VCC e 5V Note 2 CL e 50 pF RL e 2 kX TA e 25 C and VCC e 5V Note 3 TA e 25 C and VCC e 5V Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol VI VOH VOL Parameter Input Clamp Voltage High Level Output Voltage Low Level Output Voltage Conditions VCC e Min II e b18 mA VCC e Min IOH e Max VIL e Max VIH e Min VCC e Min IOL e Max VIL e Max VIH e Min IOL e 4 mA VCC e Min II IIH IIL IOS ICC Input Current Input Voltage Max VCC e Max VI e 7V VCC e Max VI e 2 7V VCC e Max VI e 0 4V VCC e Max (Note 5) VCC e Max (Note 6) 54LS DM74 b 20 b 20 Min Typ (Note 4) Max b1 5 Units V V 54LS DM74 54LS DM74 25 27 34 04 0 35 05 04 01 20 b0 4 b 100 b 100 V mA mA mA mA mA High Level Input Current Low Level Input Current Short Circuit Output Current Supply Current 15 23 Note 4 All typicals are at VCC e 5V TA e 25 C Note 5 Not more than one output should be shorted at a time and the duration should not exceed one second Note 6 With all outputs open inputs A through D grounded and 4 5V applied to S0 S1 CLEAR and the serial inputs ICC is tested with momentary ground then 4 5V applied to CLOCK 2 Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load) From (Input) Symbol Parameter To (Output) 54LS CL e 15 pF Min fMAX tPLH tPHL tPHL Maximum Clock Frequency Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output Propagation Delay Time High to Low Output Clock to Any Q Clock to Any Q Clear to Any Q 30 21 24 26 Max DM74LS CL e 50 pF RL e 2 kX Min 20 26 35 38 Max MHz ns ns ns Units Note 1 All typicals are at VCC e 5V TA e 25 C Note 2 Not more than one output should be shorted at a time and the duration should not exceed one second Note 3 With all outputs open inputs A through D grounded and 4 5V applied to S0 S1 CLEAR and the serial inputs ICC is tested with momentary ground then 4 5V applied to CLOCK Logic Diagram LS194A TL F 6407 – 2 Function Table Inputs Clear L H H H H H H H Mode S1 X X H L L H H L S0 X X H H H L L L X L Clock X X X X X H L X Serial Left Right X X X H L X X X A X X a X X X X X Parallel B X X b X X X X X C X X c X X X X X D X X d X X X X X QA L QA0 a H L QBn QBn QA0 Outputs QB L QB0 b QAn QAn QCn QCn QB0 QC L QC0 c QBn QBn QDn QDn QC0 QD L QD0 d QCn QCn H L QD0 u u u u u X H e High Level (steady state) L e Low Level (steady state) X e Don’t Care (any input including transitions) u e Transition from low to high level a b c d e The level of steady state input at inputs A B C or D respectively QA0 QB0 QC0 QD0 e The level of QA QB QC or QD respectively before the indicated steady state input conditions were established QAn QBn QCn QDn e The level of QA QB QC respectively before the most-recent u transition of the clock 3 Timing Diagram Typical Clear Load Right-Shift Left-Shift Inhibit and Clear Sequences TL F 6407 – 3 4 5 Physical Dimensions inches (millimeters) Ceramic Leadless Chip Carrier Package (E) Order Number 54LS194ALMQB NS Package Number E20A 16-Lead Ceramic Dual-In-Line Package (J) Order Number 54LS194ADMQB NS Package Number J16A 6 Physical Dimensions inches (millimeters) (Continued) 16-Lead Small Outline Molded Package (M) Order Number DM74LS194AM NS Package Number M16A 16-Lead Molded Dual-In-Line Package (N) Order Number DM74LS194AN NS Package Number N16E 7 54LS194A DM74LS194A 4-Bit Bidirectional Universal Shift Register Physical Dimensions inches (millimeters) (Continued) 16-Lead Ceramic Flat Package (W) Order Number 54LS194AFMQB NS Package Number W16A LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION As used herein 1 Life support devices or systems are devices or systems which (a) are intended for surgical implant into the body or (b) support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in a significant injury to the user National Semiconductor Corporation 1111 West Bardin Road Arlington TX 76017 Tel 1(800) 272-9959 Fax 1(800) 737-7018 2 A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system or to affect its safety or effectiveness National Semiconductor Europe Fax (a49) 0-180-530 85 86 Email cnjwge tevm2 nsc com Deutsch Tel (a49) 0-180-530 85 85 English Tel (a49) 0-180-532 78 32 Fran ais Tel (a49) 0-180-532 93 58 Italiano Tel (a49) 0-180-534 16 80 National Semiconductor Hong Kong Ltd 13th Floor Straight Block Ocean Centre 5 Canton Rd Tsimshatsui Kowloon Hong Kong Tel (852) 2737-1600 Fax (852) 2736-9960 National Semiconductor Japan Ltd Tel 81-043-299-2309 Fax 81-043-299-2408 National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications