24LC21-I/SN Microchip Technology, 24LC21-I/SN Datasheet
24LC21-I/SN
Specifications of 24LC21-I/SN
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24LC21-I/SN Summary of contents
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... Industrial (I): -40°C to +85°C Description: The Microchip Technology Inc. 24LC21 is a 128 x 8 bit Electrically Erasable PROM. This device is designed for use in applications requiring storage and serial transmission of configuration and control information. Two modes of operation have been implemented: Transmit-only mode and Bidirectional mode ...
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... ELECTRICAL CHARACTERISTICS (†) Absolute Maximum Ratings V .............................................................................................................................................................................7.0V CC All inputs and outputs w.r.t. V ........................................................................................................ -0. Storage temperature ...............................................................................................................................-65°C to +150°C Ambient temperature with power applied ................................................................................................-40°C to +125°C Soldering temperature of leads (10 seconds) .......................................................................................................+300°C ESD protection on all pins † NOTICE: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device ...
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... Schmitt Trigger inputs which provide improved specification for standard operation. I ™ Model which can be obtained from Microchip’s web site 24LC21 Units Remarks kHz — ns — ns — ns (Note 1) ns (Note 1) ns After this period the first clock ...
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... FUNCTIONAL DESCRIPTION The 24LC21 operates in two modes, the Transmit-only mode and the Bidirectional mode. There is a separate two wire protocol to support each mode, each having a separate clock input and sharing a common data line (SDA). The device enters the Transmit-only mode upon power-up ...
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... The bus must be controlled by a master device that generates the Bidirectional mode clock (SCL), controls access to the bus and generates the Start and Stop conditions, while the 24LC21 acts as the slave. Both master and slave can operate as transmitter or receiver, but the master device determines which mode is activated ...
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... The master device must generate an extra clock pulse which is associated with this Acknowledge bit. Note: The 24LC21 does not generate any Acknowledge bits if an internal program- ming cycle is in progress. The device that acknowledges has to pull down the ...
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... Page Write x The write control byte, word address and the first data byte are transmitted to the 24LC21 in the same way byte write. But instead of generating a Stop condi- tion the master transmits up to eight data bytes to the 24LC21, which are temporarily stored in the on-chip page buffer and will be written into the memory after the master has transmitted a Stop condition ...
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... It is required that V be held at a logic high level in CLK order to program the device. This applies to byte write and page write operation. Note that V while the device is in its self-timed program operation and not affect programming. Note: Page write operations are limited to writing ...
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... FIGURE 4-3: PAGE WRITE S T BUS ACTIVITY A MASTER Control R T Byte SDA LINE S BUS ACTIVITY V CLK 2004 Microchip Technology Inc. Word Data (n) Address 24LC21 Data ( Data ( DS21095J-page 9 ...
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... CLK setting V low prevents writing to any location in the CLK array. Connecting the V pin to V CLK SS 24LC21 to operate as a serial ROM, although this configuration would prevent using the device in the Transmit-only mode. 2004 Microchip Technology Inc. would allow the ...
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... Then the master issues the control byte again but with the R/W bit set to a ‘1’. The 24LC21 will then issue an acknowledge and transmits the eight bit data word. The master will not acknowledge the transfer but does ...
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... FIGURE 7-2: RANDOM READ S T Control BUS ACTIVITY A Byte MASTER SDA LINE BUS ACTIVITY FIGURE 7-3: SEQUENTIAL READ BUS ACTIVITY Control Data (n) MASTER Byte SDA LINE A C BUS ACTIVITY K DS21095J-page Word Control A Address Byte Data ( Data ( Data ( Data ( 2004 Microchip Technology Inc. ...
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... SCL low. Changes during SCL high are reserved for indicating the Start and Stop conditions. 2004 Microchip Technology Inc. 24LC21 8.2 SCL This pin is the clock input for the Bidirectional mode, and is used to synchronize data transfer to and from the device ...
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... PACKAGING INFORMATION 9.1 Package Marking Information 8-Lead PDIP XXXXXXXX XXXXXNNN YYWW 8-Lead SOIC (.150”) XXXXXXXX XXXXYYWW NNN DS21095J-page 14 Example 24LC21 017 0410 Example 24LC21 /SN0410 017 2004 Microchip Technology Inc. ...
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... L .125 .130 .135 c .008 .012 .015 B1 .045 .058 .070 B .014 .018 .022 § eB .310 .370 .430 24LC21 MILLIMETERS MIN NOM MAX 8 2.54 3.56 3.94 4.32 2.92 3.30 3.68 0.38 7.62 7.94 8.26 6.10 6.35 6.60 9.14 9.46 9.78 3.18 3.30 3 ...
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... Plastic Small Outline (SN) – Narrow, 150 mil Body (SOIC Dimension Limits Number of Pins Pitch Overall Height Molded Package Thickness Standoff § Overall Width Molded Package Width Overall Length Chamfer Distance Foot Length Foot Angle Lead Thickness Lead Width Mold Draft Angle Top ...
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... APPENDIX A: REVISION HISTORY Revision J Added note to page 1 header (Not recommended for new designs). Added Section 9.0: Package Marking Information. Added On-line Support page. Updated document format. 2004 Microchip Technology Inc. 24LC21 DS21095J-page 17 ...
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... NOTES: DS21095J-page 18 2004 Microchip Technology Inc. ...
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... Microchip's development systems software products. Plus, this line provides information on how customers ® ® can receive the most current upgrade kits. The Hot Line or Microsoft Numbers are: 1-800-755-2345 for U.S. and most of Canada, and 1-480-792-7302 for the rest of the world. 24LC21 042003 DS21095J-page 15 ...
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... Telephone: (_______) _________ - _________ Application (optional): Would you like a reply? Y Device: 24LC21 Questions: 1. What are the best features of this document? 2. How does this document meet your hardware and software development needs you find the organization of this document easy to follow? If not, why? 4 ...
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... PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office PART NO. X /XX Device Temperature Package Range 2 Device 24LC21: Dual Mode 24LC21T: Dual Mode I C Temperature Range Blank = + - +85 C Package P = Plastic DIP (300 mil Body), 8-lead ...
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... NOTES: DS21095J-page 18 2004 Microchip Technology Inc. ...
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... PICLAB, PICtail, PowerCal, PowerInfo, PowerMate, PowerTool, rfLAB, rfPICDEM, Select Mode, Smart Serial, SmartTel and Total Endurance are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. ...
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... Via Quasimodo, 12 20025 Legnano (MI) Milan, Italy Tel: 39-0331-742611 Fax: 39-0331-466781 Netherlands Waegenburghtplein 4 NL-5152 JR, Drunen, Netherlands Tel: 31-416-690399 Fax: 31-416-690340 United Kingdom 505 Eskdale Road Winnersh Triangle Wokingham Berkshire, England RG41 5TU Tel: 44-118-921-5869 Fax: 44-118-921-5820 05/28/04 2004 Microchip Technology Inc. ...