CAT25640 CATALYST [Catalyst Semiconductor], CAT25640 Datasheet
CAT25640
Available stocks
Related parts for CAT25640
CAT25640 Summary of contents
Page 1
... CC © Catalyst Semiconductor, Inc. Characteristics subject to change without notice DESCRIPTION The CAT25640 is a 64-Kb Serial CMOS EEPROM device internally organized as 8Kx8 bits. This features a 64-byte page write buffer and supports the Serial Peripheral Interface (SPI) protocol. The device is enabled through a Chip Select (CS the required bus signals are clock input (SCK), data input (SI) and data output (SO) lines ...
Page 2
... CAT25640 ABSOLUTE MAXIMUM RATINGS Parameters Storage Temperature Voltage on any Pin with Respect to Ground RELIABILITY CHARACTERISTICS Symbol Parameter (4) N Endurance END T Data Retention DR D.C. OPERATING CHARACTERISTICS V = +1.8V to +5.5V, T =-40°C to +85°C unless otherwise specified Symbol Parameter I Supply Current CCR (Read Mode) I Supply Current ...
Page 3
... Min. Max 100 Max. 1 Doc. No. MD-1128 Rev. B CAT25640 Units 10 MHz µs 2 µ Units ...
Page 4
... Status Register, as will be explained later. ¯¯ is high, the After a high to low transition on the CS CAT25640 will accept any one of the six instruction op- codes listed in Table 1 and will ignore all other possible 8-bit combinations. The communication protocol follows the timing from Figure 1. ...
Page 5
... Blocks 0 Protected 1 Protected 0 Protected 1 Protected 0 Protected 1 Protected 5 CAT25640 ¯¯¯ pin. Hardware write protection is ¯¯¯ pin is low and the WPEN bit BP0 WEL ¯¯¯¯ RDY Protection No Protection Quarter Array Protection Half Array Protection Full Array Protection ...
Page 6
... CAT25640 WRITE OPERATIONS The CAT25640 device powers up into a write disable state. The device contains a Write Enable Latch (WEL) which must be set before attempting to write to the memory array or to the status register. In addition, the address of the memory location( written must be outside the protected area, as defined by BP0 and BP1 bits from the status register ...
Page 7
... Catalyst Semiconductor, Inc. Characteristics subject to change without notice Page Write After sending the first data byte to the CAT25640, the host may continue sending data total of 64 bytes, according to timing shown in Figure 5. After each data byte, the lower order address bits are automatically incremented, while the higher order ¯ ...
Page 8
... CAT25640 Write Status Register The Status Register is written by sending a WRSR instruction according to timing shown in Figure 6. Only bits 2, 3 and 7 can be written using the WRSR command. Figure 6. WRSR Timing SCK HIGH IMPEDANCE SO Note: Dashed Line = mode ( Figure 7. WP ¯ ...
Page 9
... To read from memory, the host sends a READ instruction followed by a 16-bit address (see Table 5 for the number of significant address bits). After receiving the last address bit, the CAT25640 will respond by shifting out data on the SO pin (as shown in Figure 8). Sequentially stored data can be read out by simply continuing to run the clock ...
Page 10
... SCK HOLD SO Note: Dashed Line = mode ( Doc. No. MD-1128 Rev. B The CAT25640 device powers write disable state and in a low power standby mode. A WREN instruction must be issued prior any writes to the ¯¯¯¯¯ must device. ¯¯ ...
Page 11
... For current Tape and Reel information, download the PDF file from: http://www.catsemi.com/documents/tapeandreel.pdf. Notes: (1) All dimensions are in millimeters. (2) Complies with JEDEC MS-001. © Catalyst Semiconductor, Inc. Characteristics subject to change without notice SYMBOL CAT25640 MIN NOM MAX 5.33 0.38 2.92 3.30 4.95 0.36 0.46 0.56 1.14 1.52 1.78 0.20 0.25 0.36 9.02 9.27 10.16 7.62 7.87 8.25 2.54 BSC 6.10 6 ...
Page 12
... CAT25640 SOIC 8-Lead 150mils (V) PIN # 1 IDENTIFICATION TOP VIEW D e SIDE VIEW For current Tape and Reel information, download the PDF file from: http://www.catsemi.com/documents/tapeandreel.pdf. Notes: (1) All dimensions are in millimeters. (2) Complies with JEDEC specification MS-012. Doc. No. MD-1128 Rev. B SYMBOL θ ...
Page 13
... For current Tape and Reel information, download the PDF file from: http://www.catsemi.com/documents/tapeandreel.pdf. Notes: (1) All dimensions are in millimeters. (2) Complies with JEDEC Standard MO-153 © Catalyst Semiconductor, Inc. Characteristics subject to change without notice SYMBOL θ θ CAT25640 MIN NOM MAX 1.20 0.05 0.15 0.80 0.90 1.05 0.19 0.30 0.09 0.20 2.90 3.00 3.10 6.30 6.40 6.50 4.30 4.40 4.50 0.65 BSC 1.00 REF 0.50 0.60 0.75 0° ...
Page 14
... CAT25640 TDFN 8-Pad 2 x 3mm (VP2 PIN#1 INDEX AREA TOP VIEW SYMBO L MIN NOM A 0.70 0.75 A1 0.00 0.02 A2 0.45 0.55 A3 0.20 REF b 0.20 0.25 D 1.90 2.00 D2 1.30 1.40 E 2.90 3.00 E2 1.20 1.30 e 050 TYP L 0.20 0.30 For current Tape and Reel information, download the PDF file from: http://www.catsemi.com/documents/tapeandreel.pdf. Notes: (1) All dimensions are in millimeters. ...
Page 15
... Notes: (1) All packages are RoHS-compliant (Lead-free, Halogen-free). (2) The standard lead finish is NiPdAu. (3) The device used in the above example is a CAT25640VI-GT3 (SOIC, Industrial Temperature, NiPdAu, Tape & Reel). (4) For additional package and temperature options, please contact your nearest Catalyst Semiconductor Sales office. ...
Page 16
REVISION HISTORY Date Rev. Comments Initial Issue 5/18/07 A Update Absolute Maximum Ratings table 10/01/07 B Update all Package Outline Drawings Copyrights, Trademarks and Patents © Catalyst Semiconductor, Inc. Trademarks and registered trademarks of Catalyst Semiconductor include each of the ...