N21C21A ONSEMI | Alldatasheet
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To learn more about onsemi™, please visit our website at www.onsemi.com ON Semiconductor Is Now onsemi and and other names, marks, and brands are registered and/or common law trademarks of Semiconductor Components Industries, LLC dba “ onsemi ” or its affiliates and/or subsidiaries in the United States and/or other countries. onsemi owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of onsemi product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. onsemi reserves the right to make changes at any time to any products or information herein, without notice. The information herein is provided “as-is” and onsemi makes no warranty, representation or guarantee regarding the accuracy of the information, product features, availability, functionality, or suitability of its products for any particular purpose, nor does onsemi assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using onsemi products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information provided by onsemi . “Typical” parameters which may be provided in onsemi data sheets and/ or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. onsemi does not convey any license under any of its intellectual property rights nor the rights of others. onsemi products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use onsemi products for any such unintended or unauthorized application, Buyer shall indemnify and hold onsemi and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that onsemi was negligent regarding the design or manufacture of the part. onsemi is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. Other names and brands may be claimed as the property of others.
© Semiconductor Components Industries, LLC, 2019 June, 2020 − Rev. 1
1 Publication Order Number:
1 Kb 1-Wire EPROM
Description
The N21C21A is a 1K −bit serial EPROM containing a factory − programmed, unique 48 −bit identification number, 8 −bit CRC generation, and the 8−bit family code (09h). A 64 −bit status register controls write protection and page redirection. The N21C21A 1 −wire interface requires only a single connection and a ground return. The DATA pin is also the sole power source for the N21C21A. The small surface −mount package options saves printed −circuit− board space, while the low cost makes it ideal for applications such as battery pack configuration parameters, record maintenance, asset tracking, product−revision status, and access−code security.
Features
- 1024 Bits of One−Time Programmable (OTP) EPROM For Storage Of User−Programmable Configuration Data
- Factory−Programmed Unique 64−Bit Identification Number
- Single−Wire Interface to Reduce Circuit Board Routing
- Synchronous Communication Reduces Host Interrupt Overhead
- No Standby Power Required
- 8 byte RAM Buffer (Scratch Pad)
- Available in a 3−Pin SOT−23
- This is a Pb−Free Device
Applications
- Security Encoding
- Inventory Tracking
- Product−Revision Maintenance
- Battery−Pack Identification www.onsemi.com SOT−23 SN SUFFIX CASE 527AG PIN DESCRIPTIONS VSS3 1DQ 2VSS Pin Number Pin Description DQ − DATA Serial I/O VSS VSS UDFN6 MU SUFFIX CASE 517AP See detailed ordering and shipping information on page 13 of this data sheet.
ORDERING INFORMATION
Do not connect (NC) DQ − DATA Serial I/O Do not connect (NC) Do not connect (NC) VSS Do not connect (NC) SOT23 (Top View) UDFN6 (Top View) DQ VSS
Table 1. ABSOLUTE MAXIMUM RATINGS should not be assumed, damage may occur and reliability may be affected. performance may not be indicated by the Electrical Characteristics if operated under different conditions.
- Tested initially and after a design or process change that affects this parameter
Table 4. PIN CAPACITANCE required to program the part. Figure 1. Functional Block Diagram
of the N21C21A, configured as four pages of 32 bytes each. Commands section of this data sheet. Table 5. 1024−Bit EPROM DATA MEMORY MAP cleared by using the WRITE STATUS command. substituted for the page by the appropriate redirection byte. Table 6. EPROM STATUS BYTES are found in the CRC Generation section of this data sheet. your ON Semiconductor for more information. typical application circuit.
address low byte and then the address high byte. from the initial starting byte through the last byte of memory. time slots appear as logical 1s until a reset pulse is issued. of memory does not have the 8−bit CRC available. Table 8. READ MEMORY/FIELD CRC issued, and the entire sequence must be repeated. during the program pulse period tPROG.
Figure 4. WRITE MEMORY Command Flow
point by issuing a reset pulse. Table 9. READ STATUS COMMAND by the byte of data to be programmed. field is factory−programmed to contain 00h.
Figure 5. WRITE STATUS Command Flow
response should be checked to verify the programmed byte. to select the next byte in the STATUS MEMORY data field. host issues the next byte of data using eight write time slots. sequence can be ended at any point by issuing a reset pulse. Table 10. COMMAND CODE SUMMARY Command section of this data sheet.
www.onsemi.com Device Order Number Specific Device Marking Package Type Temperature Range Lead Finish Shipping† N21C21ASNDT3G C21 SOT-23−3 −40°C to +85°C Ni PdAu 3000 / Tape & Reel N21C21AMU6DT3G* WA UDFN6 −40°C to +85°C Ni PdAu 3000 / Tape & Reel 2. All packages are RoHS −compliant (Lead−free, Halogen−free) *Product under development †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D.
www.onsemi.com PACKAGE DIMENSIONS SOT−23/SUPERSOT/C0116−23, 3 LEAD, 1.4x2.9 CASE 527AG ISSUE A
www.onsemi.com PACKAGE DIMENSIONS UDFN6 1.6x1.6, 0.5P CASE 517AP ISSUE O NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994. 2. CONTROLLING DIMENSION: MILLIMETERS. 3. DIMENSION b APPLIES TO PLATED TERMINAL AND IS MEASURED BETWEEN 0.15 AND 0.30 mm FROM TERMINAL. 4. COPLANARITY APPLIES TO THE EXPOSED PAD AS WELL AS THE TERMINALS. ÉÉ ÉÉ A B E D BOTTOM VIEW b e 0.10 B 0.05 AC C K6X NOTE 3 0.10 C PIN ONE REFERENCE TOP VIEW 0.10 C A (A3) 0.05 C 0.05 C C SEATING PLANE SIDE VIEW L6X 1 3 DIM MIN MAX MILLIMETERS A 0.45 0.55 A1 0.00 0.05 A3 0.13 REF b 0.20 0.30 D 1.60 BSC D2 1.10 1.30 E 1.60 BSC E2 0.45 0.65 e 0.50 BSC K 0.20 −−− L 0.20 0.40 *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. MOUNTING FOOTPRINT* DETAIL A ÉÉÉÉÉÉ ÉÉÉ DETAIL B OPTIONAL MOLD CMPDEXPOSED Cu L CONSTRUCTION OPTIONAL CONSTRUCTION DETAIL B DETAIL A 1.26 0.61
0.50 PITCH
0.52 1.90 DIMENSIONS: MILLIMETERS 0.32 SOLDERMASK DEFINED L1 0.00 0.15 ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries i n the United States and/or other countries. ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property . A listing of ON Semiconductor’s product/patent ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, reg ulations and safety requirements or standards, regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the right s of others. ON Semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION TECHNICAL SUPPORT North American Technical Support: Voice Mail: 1 800−282−9855 Toll Free USA/Canada Phone: 011 421 33 790 2910 LITERATURE FULFILLMENT: Email Requests to: orderlit@onsemi.com ON Semiconductor Website: www.onsemi.com Europe, Middle East and Africa Technical Support: Phone: 00421 33 790 2910 For additional information, please contact your local Sales Representative