25lc640a Microchip Technology Inc., 25lc640a Datasheet
25lc640a
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25lc640a Summary of contents
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... MS X-Rotated TSSOP (X/ST) 1 HOLD 25XX640A is used in this document as a generic part number for the 25AA640A, 25LC640A devices. Packages P, SN, ST, MS SN, ST, MS, MF PDIP/SOIC (P, SN HOLD HOLD 6 SCK ...
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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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... Total Endurance™ Model which can be obtained from our web site: www.microchip.com begins on the rising edge of CS after a valid write sequence and ends when the internal write cycle WC is complete. © 2007 Microchip Technology Inc. 25AA640A/25LC640A Industrial (I -40°C to +85°C A Automotive (E -40°C to +125°C A Min ...
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... TABLE 1-2: AC CHARACTERISTICS (CONTINUED) AC CHARACTERISTICS Param. Sym. Characteristic No HOLD Hold Time HOLD Low to Output HZ High HOLD High to Output HV Valid 20 T Internal Write Cycle Time WC 21 — Endurance Note 1: This parameter is periodically sampled and not 100% tested. 2: This parameter is not tested but ensured by characterization. For endurance estimates in a specific application, please consult the Total Endurance™ ...
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... 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. 25AA640A/25LC640A High-Impedance n Don’t Care High-Impedance 14 Don’t Care ...
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... FUNCTIONAL DESCRIPTION 2.1 Principles of Operation The 25XX640A is a 8192-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 dis- crete I/O lines programmed properly in firmware to match the SPI protocol ...
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... SI High-Impedance SO © 2007 Microchip Technology Inc. 25AA640A/25LC640A 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) ...
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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 ...
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... FIGURE 2-5: WRITE DISABLE SEQUENCE (WRDI) CS SCK SI SO © 2007 Microchip Technology Inc. 25AA640A/25LC640A 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/R – – ...
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... WRITE STATUS REGISTER TIMING SEQUENCE (WRSR SCK Instruction Note: An internal write cycle (T WC sequence. © 2007 Microchip Technology Inc. 25AA640A/25LC640A 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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... STATUS register internal write cycle has already begun, WP going low will have no effect on the write. © 2007 Microchip Technology Inc. 25AA640A/25LC640A The WP pin function is blocked when the WPEN bit in the STATUS register is low. This allows the user to install the 25XX640A in a system with WP pin grounded and still be able to write to the STATUS reg- ister ...
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... Device 25AA640A 25LC640A Example: 25LC640A e I/P 1L7 3 0728 Example: 25L640AI SN 0728 e 3 1L7 Example: TSSOP 1st Line Marking Codes 5LCA Device I728 1L7 25AA640A 25AA640AX 25LC640A 25LC640AX © 2007 Microchip Technology Inc. std mark 5ACA 5LCA std mark 5ACA ACAX 5LCA LCAX ...
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... NOTE TOP VIEW φ © 2007 Microchip Technology Inc. 25AA640A/25LC640A EXPOSED PAD BOTTOM VIEW A2 A3 NOTE NOTE 1 DS21830C-page 15 ...
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... D N NOTE DS21830C-page φ L © 2007 Microchip Technology Inc. ...
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... N NOTE © 2007 Microchip Technology Inc. 25AA640A/25LC640A DS21830C-page 17 ...
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... N NOTE DS21830C-page φ α c β © 2007 Microchip Technology Inc. ...
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... Microchip Technology Inc. 25AA640A/25LC640A DS21830C-page 19 ...
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... D N NOTE DS21830C-page φ L © 2007 Microchip Technology Inc. ...
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... APPENDIX A: REVISION HISTORY Revision B Corrections to Section 1.0, Electrical Characteristics. Revision C Features and Description, removed reference to Pb- free packages; Revise Table 1-2: AC Characteristics, parameters 7 and 8; Updated Packing Information/ Package Drawings; Add DFN Package; Removed trademark from SPI. © 2007 Microchip Technology Inc. 25AA640A/25LC640A DS21830C-page 21 ...
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... NOTES: DS21830C-page 22 © 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. 25AA640A/25LC640A 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: 25AA640A/25LC640A 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., MSOP package 25AA640AT-I/ kbit, 32-byte page, 1.8V Serial EEPROM, Industrial temp., Tape & Reel, SOIC package 25LC640AT-E/ kbit, 32-byte page, 2.5V Serial EEPROM, Extended temp., Tape & Reel, SOIC package 25LC640AT-I/ kbit, 32-byte page, 2.5V Serial EEPROM, Industrial temp., Tape & Reel, ...
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... NOTES: DS21830C-page 26 © 2007 Microchip Technology Inc. ...
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... Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights. © 2007 Microchip Technology Inc. Trademarks The Microchip name and logo, the Microchip logo, Accuron, dsPIC, K ...
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... 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 ...