93L14

93L14 NSC | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 6

Technical content

Features

Y Can be used as single input D latches or set/reset latches Y Active low enable gate input Y Overriding master reset Connection Diagram Dual-In-Line Package TL/F/9612–1 Order Number 93L14DMQB or 93L14FMQB See NS Package Number J16A or W16A Logic Symbol TL/F/9612–2 VCC e Pin 16 GND e Pin 8 Pin Names Description E Enable Input (Active LOW) D0–D3 Data Inputs S 0–S 3 Set Inputs (Active LOW) MR Master Reset Input (Active LOW) Q0–Q3 Latch Outputs C1995 National Semiconductor Corporation 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 5.5V Operating Free Air Temperature Range MIL b55§Ct o a125§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 93L14 (MIL) Units Min Nom Max VCC Supply Voltage 4.5 5 5.5 V VIH High Level Input Voltage 2 V VIL Low Level Input Voltage 0.7 V IOH High Level Output Voltage b400 mA IOL Low Level Output Current 4.8 mA TA Free Air Operating Temperature b55 125 §C ts (H) Setup Time HIGH or LOW 10 nsts (L) D n to E 20 th (H) Hold Time HIGH or LOW 0 nsth (L) D n to E 10 ts (H) Setup Time HIGH, D n to S n 15 ns th (L) Hold Time LOW, D n to S n 5n s tw (L) E Pulse Width LOW 30 ns tw (L) MR Pulse Width LOW 25 ns trec Recovery Time, MR to E 5n s

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 10 mA b1.5 V VOH High Level Output Voltage V CC e Min, I OH e Max, 2.4 VVIL e Max, V IH e Min VOL Low Level Output Voltage V CC e Min, I OL e Max, 0.3 VVIH e Min, V IL e Max II Input Current @ Max V CC e Max, V I e 5.5V 1m AInput Voltage IIH High Level Input Current V CC e Max, V I e 2.4V Inputs 20 mA Dn 30 IIL Low Level Input Current V CC e Max, V I e 0.3V Inputs b400 mA Dn b600 IOS Short Circuit V CC e Max b2.5 b25 mAOutput Current (Note 2) ICC Supply Current V CC e Max (Note 3) 16.5 mA 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. Note 3: ICC is measured with all outputs open and all inputs grounded. Switching Characteristics VCC ea 5.0V, T A ea 25§C (See Section 1 for waveforms and load configurations) Symbol Parameter CL e 15 pF Units Min Max tPLH Propagation Delay 45 nstPHL E to Q n 36 tPLH Propagation Delay 30 nstPHL Dn to Q n 30 tPLH Propagation Delay, MR to Q n 30 ns tPHL Propagation Delay, S n to Q n 33 ns

The 93L14 consists of four latches with a common active LOW Enable input and active LOW Master Reset input. When the Enable goes HIGH, data present in the latches is stored and the state of the latch is no longer affected by the S n and D n inputs. The Master Reset when activated over- rides all other input conditions forcing all latch outputs LOW. Each of the four latches can be operated in one of two modes: D-TYPE-LATCHÐFor D-type operation the S input of a latch is held LOW. While the common Enable is active the latch output follows the D input. Information present at the latch output is stored in the latch when the Enable goes HIGH. SET/RESET LATCHÐDuring set/reset operation when the common Enable is LOW a latch is reset by a LOW on the D input, and can be set by a LOW on the S input if the D input is HIGH. If both S and D inputs are LOW, the D input will dominate and the latch wil be reset. When the Enable goes HIGH, the latch remains in the last state prior to disable- ment. The two modes of latch operation are shown in the Truth Table. Truth Table MR E DS Qn Operation H L L L L D Mode HL H L L HH X X Q nb1 H L L L L R/S Mode HL H LH HL L HL H LHHQ nb1 HH X X Q nb1 L X X X L RESET H e HIGH Voltage Level L e LOW Voltage Level X e Immaterial Qnb1 e Previous Output State Qn e Present Output State Logic Diagram TL/F/9612–3

Physical Dimensions inches (millimeters) 16-Lead Ceramic Dual-In-Line Package (J) Order Number 93L14DMQB

Physical Dimensions inches (millimeters) (Continued) 16-Lead Ceramic Flat Package (W) Order Number 93L14FMQB 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.