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This is accomplished by sending the required command, address and data serially one bit at a time over single pins instead of the multiple pins of a parallel part.
Although not as fast, serial eeproms and nvrams find use in many products due to their small size and low cost. These parts must be erased before programming.
Datasheeet high storage capacity allows use in computer BIOS plus other memory intensive product applications.
These memory chips store the bits of data by blowing small fuses inside the memory device. Once they are programmed they cannot be changed. Microcontrollers are usually found in products which perform a single function such as microwave ovens, computer printers, automatic sprinkler controllers, etc. A microcontroller normally has 40 or more pins since the input and output operations occur directly from the chip.
Due to the number of device manufacturers, the catagories below are organized by technology family and device pin count. 29f010bb listed device numbers conform to the core numbers used by most industry standard parts.
Since the individual listing of every part number from every manufacturer creates a prohibitively large list, we list all supported manufacturers in a separate table with core part numbers arranged by technology family and pin count where applicable.
This approach allows you to more easily locate a device number, as many users do not know the manufacturer of the device in which they have interest. If you are uncertain about support for a specific part, please don’t hesitate to contact us by phone or email.
A core part number is a number which identifies a device regardless of the manufacturer. The core number is normally easy to determine and serves eatasheet the industry standard description for nearly all common programmable devices with multiple manufacturers.
The example below describes how to determine a typical core 29f001b number. Remember, a core part number usually represents hundreds of actual part numbers due to different manufacturers, speeds, temperatures, package types and other chip characteristics.
29F010 – 29F010 1M (128kb x 8) 70/95ns CMOS FLASH Memory Technical Data
The images on the bottom right are close-up views of the first three eprom packages. The CORE part number for each device is Each has the manufacturers 29f010n part number printed on the device.
The CORE part number is easily identified and has been hi-lited. CORE part numbers are easily discerned once you exclude any prefix or suffix characters. Most devices, regardless of the technology family, can be identified by their CORE part number. Although not used in new designs, these parts are still commonly found datasheey older products and equipment.
29F Datasheet STMicroelectronics pdf data sheet FREE from
These parts appeared in the mid to early ‘s and most are still manufactured today. These parts are always in plastic cases because the erasing of the part is done electrically without the need to expose the internal chip to ultraviolet light. Unlike Flash devices, these memory parts can have individual bytes changed without the need to erase the entire part. Additional information about this technology family.
The NV stands for non-volatile. The RAM would normally lose ratasheet contents when power is ratasheet, however the NVRAM is manufactured with a built in battery which keeps power applied to the memory daatsheet power has been removed from the product. The FRAM is also a non-volatime memory component however it uses ferro-electric magnetic structure to store information. These parts do not have a battery and maintain their information as an array of magnetic charges.