25LC256-I/ST Microchip Technology, 25LC256-I/ST Datasheet
25LC256-I/ST
Specifications of 25LC256-I/ST
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25LC256-I/ST Summary of contents
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... SS SI Serial Data Input SCK Serial Clock Input HOLD Hold Input V Supply Voltage CC * 25XX256 is used in this document as a generic part number for the 25AA256, 25LC256 devices. © 2007 Microchip Technology Inc. 25AA256/25LC256 Page Size Temp. Ranges 64 Byte Byte I Description: The Microchip Technology Inc. 25AA256/25LC256 ...
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... ELECTRICAL CHARACTERISTICS (†) Absolute Maximum Ratings V .............................................................................................................................................................................6.5V CC All inputs and outputs w.r.t. V ......................................................................................................... -0. Storage temperature .................................................................................................................................-65°C to 150°C Ambient temperature under bias ...............................................................................................................-40°C to 125°C ESD protection on all pins ..........................................................................................................................................4 kV † NOTICE: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device ...
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... This parameter is not tested but ensured by characterization. For endurance estimates in a specific application, please consult the Total Endurance™ Model which can be obtained from Microchip’s web site at www.microchip.com. © 2007 Microchip Technology Inc. 25AA256/25LC256 Industrial (I -40°C to +85°C A Automotive (E -40° ...
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... TABLE 1-2: AC CHARACTERISTICS (CONTINUED) AC CHARACTERISTICS Param. Sym. Characteristic No HOLD Low to Output HZ High HOLD High to Output HV Valid 20 T Internal Write Cycle WC Time 21 — Endurance Note 1: This parameter is periodically sampled and not 100% tested begins on the rising edge of CS after a valid write sequence and ends when the internal write cycle WC is complete ...
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... SI HOLD FIGURE 1-2: SERIAL INPUT TIMING CS 2 Mode 1,1 Mode 0,0 SCK MSB in SO FIGURE 1-3: SERIAL OUTPUT TIMING SCK 13 MSB out SO SI © 2007 Microchip Technology Inc. 25AA256/25LC256 High-Impedance n Don’t Care High-Impedance 14 Don’t Care LSB in 3 Mode 1,1 ...
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... FUNCTIONAL DESCRIPTION 2.1 Principles of Operation The 25XX256 is a 32,768-byte Serial EEPROM designed to interface directly with the Serial Peripheral Interface (SPI) port of many of today’s popular microcontroller families, including Microchip’s PIC microcontrollers. It may also interface with microcon- trollers that do not have a built-in SPI port by using discrete I/O lines programmed properly in firmware to match the SPI protocol ...
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... SI High-Impedance SO © 2007 Microchip Technology Inc. 25AA256/25LC256 HV Generator EEPROM Array Page Latches Y Decoder Sense Amp. R/W Control Read data from memory array beginning at selected address Write data to memory array beginning at selected address Reset the write enable latch (disable write operations) Set the write enable latch (enable write operations) ...
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... FIGURE 2-2: BYTE WRITE SEQUENCE SCK Instruction High-Impedance SO FIGURE 2-3: PAGE WRITE SEQUENCE SCK Instruction SCK Data Byte DS21822F-page 16-bit Address 16-bit Address Data Byte Twc Data Byte Data Byte Data Byte n (64 max © 2007 Microchip Technology Inc. ...
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... FIGURE 2-5: WRITE DISABLE SEQUENCE (WRDI) CS SCK SI SO © 2007 Microchip Technology Inc. 25AA256/25LC256 The following is a list of conditions under which the write enable latch will be reset: • Power-up See • WRDI instruction successfully executed • WRSR instruction successfully executed • WRITE instruction successfully executed ...
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... Read Status Register Instruction (RDSR) The Read Status Register instruction (RDSR) provides access to the STATUS register. The STATUS register may be read at any time, even during a write cycle. The STATUS register is formatted as follows: TABLE 2-2: STATUS REGISTER W W/R W/R WPEN ...
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... See Table 2-1 for a matrix of functionality on the WPEN bit. FIGURE 2-7: WRITE STATUS REGISTER TIMING SEQUENCE (WRSR SCK Instruction Note: An internal write cycle (T sequence. © 2007 Microchip Technology Inc. 25AA256/25LC256 See Figure 2-7 for the WRSR timing sequence. TABLE 2-3: BP1 Data to STATUS Register ...
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... Data Protection The following protection has been implemented to prevent inadvertent writes to the array: • The write enable latch is reset on power-up • A write enable instruction must be issued to set the write enable latch • After a byte write, page write or STATUS register write, the write enable latch is reset • ...
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... WP going low will have no effect on the write. © 2007 Microchip Technology Inc. 25AA256/25LC256 The WP pin function is blocked when the WPEN bit in the STATUS register is low. This allows the user to install the 25XX256 in a system with WP pin grounded and still be able to write to the STATUS register ...
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... I/P e 1L7 3 0528 Example: 8-Lead SOIC (208 mil) 25LC256I XXXXXXXX SN e 0528 XXXXXXXX 3 YYWWNNN 1L7 Example: TSSOP 1st Line Marking Codes 5LE Device I528 25AA256 1L7 25LC256 Example: 25LC256 I/ 05281L7 Standard Rotated 5AE 5AEX 5LE 5LEX © 2007 Microchip Technology Inc. ...
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... Pin 1 visual index feature may vary, but must be located within the hatched area. 2. Package may have one or more exposed tie bars at ends. 3. Dimensioning and tolerancing per ASME Y14.5M. BSC: Basic Dimension. Theoretically exact value shown without tolerances. REF: Reference Dimension, usually without tolerance, for information purposes only. © 2007 Microchip Technology Inc. 25AA256/25LC256 ...
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... Plastic Dual In-Line (P) – 300 mil Body [PDIP] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging N NOTE Number of Pins Pitch Top to Seating Plane Molded Package Thickness Base to Seating Plane Shoulder to Shoulder Width ...
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... Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.15 mm per side. 4. Dimensioning and tolerancing per ASME Y14.5M. BSC: Basic Dimension. Theoretically exact value shown without tolerances. REF: Reference Dimension, usually without tolerance, for information purposes only. © 2007 Microchip Technology Inc. 25AA256/25LC256 ...
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... Standard, Formerly called SOIC) 8-Lead Plastic Small Outline (SM) – Medium, 5.28 mm Body [SOIJ] Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging α Number of Pins Pitch Overall Height Molded Package Thickness Standoff § ...
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... Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.15 mm per side. 3. Dimensioning and tolerancing per ASME Y14.5M. BSC: Basic Dimension. Theoretically exact value shown without tolerances. REF: Reference Dimension, usually without tolerance, for information purposes only. © 2007 Microchip Technology Inc. 25AA256/25LC256 ...
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... APPENDIX A: REVISION HISTORY Revision C (11/03) Corrections to Section 1.0, Electrical Characteristics. Revision D (06/05) Update package information Revision E (08/05) Remove Preliminary status. Revise Table 1-1, Params. D011 and D012. Revision F (05/07) Update Pb-free; Replace Package Drawings (Rev. AP); Update Product ID section. DS21822F-page 20 © 2007 Microchip Technology Inc. ...
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... To register, access the Microchip web site at www.microchip.com, click on Customer Change Notification and follow the registration instructions. © 2007 Microchip Technology Inc. 25AA256/25LC256 CUSTOMER SUPPORT Users of Microchip products can receive assistance through several channels: • Distributor or Representative • ...
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... Telephone: (_______) _________ - _________ Application (optional): Would you like a reply? Y Device: 25AA256/25LC256 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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... Serial EEPROM, Industrial temp., Tape & Reel, SOIC package 25AA256T-I/ST = 256k-bit, 1.8V Serial EEPROM, Industrial temp., Tape & Reel, TSSOP package 25LC256-I/P = 256k-bit, 2.5V Serial EEPROM, Industrial temp., P-DIP package 25LC256T-E/ST = 256k-bit, 2.5V Serial EEPROM, Extended temp., Tape & Reel, TSSOP package 25LC256XT-I/ST = 256k-bit, 2 ...
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... NOTES: DS21822F-page 24 © 2007 Microchip Technology Inc. ...
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... PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB, Select Mode, Smart Serial, SmartTel, Total Endurance, UNI/O, WiperLock and ZENA 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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... Fax: 886-3-572-6459 Taiwan - Kaohsiung Tel: 886-7-536-4818 Fax: 886-7-536-4803 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350 © 2007 Microchip Technology Inc. EUROPE Austria - Wels Tel: 43-7242-2244-39 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 France - Paris Tel: 33-1-69-53-63-20 ...