DM74LS395 NSC | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 6
Technical content
Features
Y Shift right or parallel 4-bit register Y TRI-STATE outputs Y Input clamp diodes limit high speed termination effects Y Fully CMOS and TTL compatible Connection Diagram Dual-In-Line Package TL/F/9833–1 Order Number DM74LS395WM or DM74LS395N See NS Package Number M16B or N16E Logic Symbol TL/F/9833–2 VCC e Pin 16 GND e Pin 8 Mode Select Table Operating Mode Inputs @ tn Outputs @ tna1 MR CP SD S Pn O0 O1 O2 O3 Asynchronous Reset L X X X X L L L L Shift, SET First Stage H K LH X HO 0 n O1n 02n Shift, RESET First Stage H K LL X LO 0 n O1n 02n Parallel Load H K HXP n P 0P 1 P 2 P 3 tn,t na1 e Time before and after CP HIGH-to-LOW transition H e HIGH Voltage Level L e LOW Voltage Level X e Immaterial TRI-STATEÉ is a registered trademark of National Semiconductor Corporation. C1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.
Absolute Maximum Ratings (Note) Supply Voltage 7V Input Voltage 7V Operating Free Air Temperature Range 0 §Ct o a70§C Storage Temperature Range b65§Ct o a150§C Note: The ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaran- teed. 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 Parameter Min Nom Max Units VCC Supply Voltage 4.75 5 5.25 V VIH High Level Input Voltage 2 V VIL Low Level Input Voltage 0.8 V IOH High Level Output Current b0.4 mA IOL Low Level Output Current 8 mA TA Free Air Operating Temperature 0 70 §C ts (H) Setup Time HIGH or LOW 20 nsts (L) S, D S or P n to CP 20 th (H) Hold Time HIGH or LOW 5 nsth (L) S, D S or P n to CP 5 tw (L) CP Pulse Width LOW 18 ns tw (L) MR Pulse Width LOW 20 ns Electrical Characteristics Over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions Min Typ Max Units(Note 1) VI Input Clamp Voltage V CC e Min, I I eb 18 mA b1.5 V VOH High Level Output V CC e Min, I OH e Max 2.7 VVoltage V IL e Max VOL Low Level Output V CC e Min, I OL e Max 0.35 0.5Voltage V IH e Min V IOL e 4 mA, V CC e Min 0.25 0.4 II Input Current @ Max V CC e Max, V I e 7V 0.1 mAInput Voltage IIH High Level Input Current V CC e Max, V I e 2.7V 20 mA IIL Low Level Input Current V CC e Max, V I e 0.4V b0.4 mA IOS Short Circuit Output Current V CC e Max (Note 2) b20 b100 mA ICC Supply Current with V CC e Max, OE ,D S,S e 4.5V 29 mAOutputs OFF CP e K,P n e GND Supply Current with V CC e Max, D S,S e 4.5V 25 mAOutputs ON OE ,C P ,P n e GND IOZH TRI-STATE Output Off V CC e VCCH 20 mACurrent HIGH V OZH e 2.7V IOZL TRI-STATE Output Off V CC e VCCH b20 mACurrent LOW V OZL e 0.4V Note 1: All typicals are at V CC e 5V, T A e 25§C. Note 2: Not more than one output should be shorted at a time, and the duration should not exceed one second.
VCC ea 5.0V, T A ea 25§C Symbol Parameter RL e2k X,C L e 15 pF Units Min Max fmax Maximum Shift Frequency 30 MHz tPLH Propagation Delay 35 nstPHL CP to O n 25 tPHL Propagation Delay 35 nsMR to O n tPZH Output Enable Time 20 nstPZL 20 tPHZ Output Disable Time 17 nstPLZ 23 Functional Description The ‘LS395 contains four D-type edge-triggered flip-flops and auxiliary gating to selec t a D input either from a Parallel (Pn) input or from the preceding stage. When the Select input is HIGH, the P n inputs are enabled. A LOW signal in the S input enables the serial inputs for shift-right opera- tions, as indicated in the Truth Table. State changes are initiated by HIGH-to-LOW transitions on the Clock Pulse (CP ) input. Signals on the P n,D S and S inputs can change when the Clock is in either state, provid- ed that the recommended setup and hold times are ob- served. When the S input is LOW, a CP HIGH-LOW tran- sition transfers data in O0 to O1, O1 to O2, and O2 to O3. A left-shift is accomplished by connecting the outputs back to the P n inputs, but offset one place to the left, i.e., O3 to P2, O2 to P1, and O1 to P0, with P3 acting as the linking input from another package. When the OE input is HIGH, the output buffers are disabled and the O0–O3 outputs are in a high impedance condition. The shifting, parallel loading or resetting operations can still be accomplished, however. Logic Diagram TL/F/9833–3
Physical Dimensions inches (millimeters) 16-Lead Wide Small Outline Molded Package (M) Order Number DM74LS395WM
DM74LS395 4-Bit Shift Register with TRI-STATE Outputs Physical Dimensions inches (millimeters) (Continued) 16-Lead Molded Dual-In-Line Package (N) Order Number DM74LS395N 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 2. A critical component is any component of a life systems which, (a) are intended for surgical implant support device or system whose failure to perform can into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life failure to perform, when properly used in accordance support device or system, or to affect its safety or with instructions for use provided in the labeling, can effectiveness. be reasonably expected to result in a significant injury to the user. National Semiconductor National Semiconductor National Semiconductor National Semiconductor Corporation Europe Hong Kong Ltd. Japan Ltd.
1111 West Bardin Road Fax: (
a49) 0-180-530 85 86 13th Floor, Straight Block, Tel: 81-043-299-2309 Arlington, TX 76017 Email: cnjwge @ tevm2.nsc.com Ocean Centre, 5 Canton Rd. Fax: 81-043-299-2408 Tel: 1(800) 272-9959 Deutsch Tel: ( a49) 0-180-530 85 85 Tsimshatsui, Kowloon Fax: 1(800) 737-7018 English Tel: ( a49) 0-180-532 78 32 Hong Kong Fran3ais Tel: ( a49) 0-180-532 93 58 Tel: (852) 2737-1600 Italiano Tel: ( a49) 0-180-534 16 80 Fax: (852) 2736-9960 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.