The AT93C46EN-SH-B from Microchip is a 1Kbit (128×8 or 64×16) Microwire serial EEPROM with 2MHz clock rate, 1 million erase\/write cycles, and 100-year data retention in an 8-pin SOIC package.<\/p>\n
| Memory Size<\/td>\n | 1 Kbit (128 x 8 or 64 x 16)<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||
| Interface<\/td>\n | Microwire (3-wire serial: CS, SK, DI\/DO)<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||
| Organization<\/td>\n | Configurable: 8-bit or 16-bit<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||
| Clock Frequency<\/td>\n | 2 MHz (max)<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||
| Tensi\u00f3n de alimentaci\u00f3n<\/td>\n | 1.8V to 5.5V<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||
| Write Cycle Time<\/td>\n | 5 ms (max)<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||
| Erase\/Write Endurance<\/td>\n | 1,000,000 cycles<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||
| Data Retention<\/td>\n | 100 years<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||
| Write Protect<\/td>\n | Yes (protect upper quarter)<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||
| Paquete<\/td>\n | 8-SOIC (3.9mm width)<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||
| Temperatura de funcionamiento<\/td>\n | -40 to +85 C<\/td>\n<\/tr>\n<\/table>\nCaracter\u00edsticas<\/h2>\nAplicaciones<\/h2>\nProduct Overview The AT93C46EN-SH-B from Microchip is a 1Kbit (128×8 or 64×16) Microwire serial EEPROM with 2MHz clock rate, 1 million erase\/write cycles, and 100-year data retention in an 8-pin SOIC package. Key Specifications Memory Size 1 Kbit (128 x 8 or 64 x 16) Interface Microwire (3-wire serial: CS, SK, DI\/DO) Organization Configurable: 8-bit […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13],"tags":[],"chip_brand":[134],"class_list":["post-3781","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","chip_brand-microchip"],"acf":{"brief_explanation":"1Kbit Microwire EEPROM, 2MHz, 1.8-5.5V, 8\/16-bit config, SOIC-8","date_code":"","package_case":"8-SOIC (4.9 x 3.9 x 1.25 mm, SN package)","in_stock":8634,"datasheet":"https:\/\/ww1.microchip.com\/downloads\/en\/DeviceDoc\/Atmel-9364-SEEPROM-AT93C46D-Datasheet.pdf","price":"$0.25 @ 1ku","product_introduction":"The AT93C46EN-SH-B from Microchip is a 1Kbit Microwire serial EEPROM organized as either 128 words of 8 bits each or 64 words of 16 bits each, selectable via the ORG (organization) pin. The device uses the industry-standard 3-wire Microwire serial bus (CS, SK, DI\/DO) for communication, making it compatible with a wide range of microcontrollers and ASICs. The Microwire protocol is a synchronous serial interface where the master provides the clock (SK), chip select (CS), and data input (DI) signals, while the EEPROM provides data output (DO). The AT93C46 supports all standard EEPROM operations: READ, WRITE, ERASE, ERAL (erase all), WRAL (write all), and EWEN\/EWDS (enable\/disable writing). The write cycle is self-timed with automatic erase-before-write, requiring only 5ms maximum per write cycle. The ORG pin allows the designer to choose between 8-bit and 16-bit data word organization without changing the software protocol; when ORG is tied to VCC, the device operates in 16-bit mode (64 words x 16 bits); when ORG is tied to GND, it operates in 8-bit mode (128 words x 8 bits). The hardware write protect feature (protect pin) prevents accidental writes to the upper quarter of the memory array, protecting critical configuration data. With 1 million erase\/write cycle endurance and 100-year data retention, the AT93C46 is suitable for storing calibration constants, configuration parameters, and serial numbers in industrial and consumer applications.","working_principle":"The AT93C46EN-SH-B operates as a Microwire serial EEPROM. Key subsystems include: (1) Microwire Interface - a synchronous serial protocol where CS (chip select) enables the device; SK (serial clock) synchronizes data transfer; DI (data in) receives commands and data from the master; DO (data out) sends data back to the master; each operation begins with a start bit (1), followed by an opcode (2 bits), address (6 or 7 bits depending on organization), and data; (2) Instruction Set - READ (opcode 10): reads data from specified address; ERASE (opcode 11): erases the specified address; WRITE (opcode 01): writes data to specified address after auto-erase; ERAL (opcode 00+10): erases all addresses; WRAL (opcode 00+01): writes same data to all addresses; EWEN (opcode 00+11): enables writing; EWDS (opcode 00+00): disables writing; (3) Self-Timed Write - when a WRITE or ERASE command is received, the device internally generates the high voltage needed for programming; the write cycle takes 5ms maximum; the BUSY\/READY status can be checked by polling CS; (4) Organization Select - the ORG pin selects between x8 and x16 modes at power-up; in x8 mode, addresses are 7 bits (A6-A0) accessing 128 bytes; in x16 mode, addresses are 6 bits (A5-A0) accessing 64 words; (5) Write Protect - when the protect pin is asserted, the upper quarter of the memory (addresses 96-127 in x8 mode or 48-63 in x16 mode) is write-protected, preventing accidental modification of critical data.","pin_description":"
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