Atmel (which has been acquired by Microchip), headquartered in the United States, is a leading enterprise in the DSP and MCU industry. Founded in 1984, Atmel's products include microprocessors, programmable logic devices, non-volatile memory, security chips, mixed signal and RF RF integrated circuits. Atmel is focused on the high-growth electronic device market, and as the founding father of non-volatile memory technology, Atmel will continue to integrate this core capability into its complex offerings for computing and consumer products. Atmel offers 32-bit microcontrollers based on ARM(r). With a broad portfolio of 80C51 architecture based microcontrollers, Atmel offers an industry-leading range of ARM-based flash memory MCUS and eMPU solutions to meet the needs of virtually any device or market. Atmel's ARM-based solutions are flexible and highly integrated, designed to optimize system control, wired and wireless connectivity, user interface management, low power consumption and ease of use. Atmel enables developers to develop comprehensive solutions for the industrial, consumer, security, communications, computer and automotive markets. ATME's world-class expertise and extensive experience in system-level integration enables its products to be developed on the basis of existing modules with minimal development delays and risks. Most of the 51 core microcontrollers on the market now come from Atmel. After obtaining 51 cores, Atmel developed the AT89S series microcontroller embedded in Flash memory, which is the standard 51 cores, and obtained a large number of markets in China by cheap and good marketing. Atmel also has the reduced instruction set AVR series of microcontrollers, which is currently the fastest 8-bit microcontroller. With a portfolio of embedded microcontrollers, wireless ZigBee technology and serial memory products, Atmel is moving into the smart power and smart grid markets designed to reduce energy consumption. As more and more electronic products are used in automobiles, Atmel offers advanced automotive and RF solutions that make automotive electronic systems more reliable, compact and affordable. As a global semiconductor leader, Atmel understands our customers' desire to create the best products and bring them to market at the right time. Atmel has market-leading designs covering products ranging from body electronics, network connectivity and anti-theft systems to engines, lighting and entertainment components. Atmel's touch technology and dedicated touch technology in buttons, sliders and pulleys provide a unique personal feel to the human machine interface to help you succeed. Atmel's new, scalable, low-power, purpose-built designs help design low-cost, high-efficiency wireless technologies and RF solutions.

Atmel has a total of three series of microcontroller AT89 AT90 AT91. AT89 is a single chip computer with 51 cores as standard. It is an improved 51 microcontroller. For example, the standard 8051 MCU does not have a 20-pin package chip. However, AT89C2051 AT89C4051 is a 20pin package of single-chip computers. It is mainly to omit the P0 port and P2 port of the original 51 MCU, and then improve some functions. It can be considered that they are simplified 51 microcontroller, more suitable for beginners to learn. There are many models of AT89. For example, AT89C51 AT89S51 AT89C52 AT89S8252(the latter several are actually 8052 MCU, but are compatible with the 8051 instruction system, just add some functions, it can also be considered as 51 series of MCU). For AT89 series single-chip microcomputer are FLASH single-chip microcomputer, the number of burning at least 1000 times more (data manual, the actual estimate is more than 4000) as long as the chip with the word "s" single-chip microcomputer can support ISP(online burning). AT89C51ND1X series chip is a DSP+MCU hybrid solution specially developed for embedded multimedia applications in mp3 industry. With this chip MP3 integrated USB, MMC embedded very small system software, fully functional with USB function only 15K bytes of firmware code. This MP3 decoder and hardware interface controller is very low power consumption. The AT90 series microcontroller mainly corresponds to the AVR microcontroller (which is the most important microcontroller of Atmel). The AVR is divided into three gears. Attiny series, AT90 series, ATmega series. Corresponding to AVR in the low, mid-range and high-end single-chip computers. Now the AT90 series MCU has been transformed to the Attiny series and ATmega series. All AVR microcontrollers support ISP. And AVR MCU is a RISC (reduced instruction) type MCU. 51 Single chip microcomputer is CISC (centralized instruction) type single chip microcomputer. The function of AVR microcontroller is much stronger than 51. AT91 series microcontroller mainly corresponds to the high-end 32-bit ARM microcontroller. Generally, ARM7 core is used, ARM is now the mainstream MCU in embedded system 32-bit.

On January 20, 2016, Microchip signed an agreement to acquire Atmel. Atmel said Microchip's proposed acquisition was better than the company's previous deal with Dialog Semiconductor. After Atmel announced that Microchip Technology had offered a higher price of $8.15 per share in cash and stock, Dialog said it would not raise its bid again. Microchip Technology announced that the equity value of its acquisition of Atmel Atmel is approximately $3.56 billion. Atmel had also attracted interest from California chipmaker Cypress Semiconductor. Several media outlets reported last year that Atmel was considering a number of strategic options, including a sale. The global semiconductor industry was consolidating last year as margins came under pressure. For example, NXP Semiconductors bought Freescale for $11.8 billion, INTEL Intel bought Altera for $16.7 billion, AVAGO Avwar High-tech's $37 billion acquisition of Broadcom is set to close on February 1, Microchip acquired Micrel for $839 million last August. Microchip is one of the few major microprocessor (MCU) vendors not using the ARM core, and pioneered its own PIC microcontroller architecture. Atmel offers ARM capabilities, so a merger with Microchip would seem to make more strategic sense for Atmel than a merger with Dialog.

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Atmel Popular models recommended:

•       AT22LV10L-25SC  AT24C32W-10SC   AT24C32-10PC

•       AT24C164  AT22LV10-20PC   AT17LV512

•       AT28BV16-25PC   AT27LV1026-45JC   AT27C800-10RI

•       AT27C256R-55JI   AT27LV010A-12JC   AT27BV256-15JI

•       AT27C2048-70PI   AT27C512R-45PI   AT27BV020-15TI

•       AT27BV256-15JC  AT24C02A-10PI-2.7  AT24C32-10SI-2.5

•       AT24C128N-10SI-1.8  AT27C040-70PI  AT24C32-10PI-2.5

•       AT27C256R   AT25128C1-10CC-2.7   AT27C010-45TC

•       AT24CS256W-10SC  AT24C128T1-10TI-2.7  AT24C01A-10PI-2.5

•       AT24C08A-10SI-2.5  AT25P1024C1-10CI-2.7  AT27BV010-70JI

•       AT25128N-10SC  AT17C256-10JI  AT24C512-10PI

•       AT24C32N-10SC  AT24C64   AT22LV10-20SI  AT17C512

•       T89C51RD2-3CRI-L  T89C51RD2-DDUC-L  T89C51RD2-SLSC-L

•       T89C51RD2-SMTI-M  AT93C66-10PI-1.8  ATV2500L-35PC

•       T89C51RD2-SMWC-M  AT49LV002NT-70TI  ATV2500BQL-25DI

•       AT49LV002NT-70JC   AT49F001NT-12JC   ATV2500BQ-25PI

•       T89C51RD2-RDUC-M  ATTINY26-16SI  AT49LV001NT-90TC

•       T555714M01-DBW   AT49BV002NT-90JC  ATV750B-25PC

•       TS68882DESC04XA   ATF1504ASZ-25JC68  T555715M01-DDW

•       TS68302MA16   U643B  TS68302VR16  ATF22V10B-15PI

•       T89C51RD2-RDFI-L  AT24C08A-10PI-1.8  AT24C08AN-10SI-2.7

•       AT49BV001NT-90TI  ATF20V8B-15JI  T5743  ATMEGA163L-4PI

•       ATV750  AT49F001T-90PI  ATF22V10C-10SC  ATF20V8B-10XC

•       AT49BV002T-12TC  AT93C57W-10SC  AT6005ALV-4AC

•       ATF22V10CZ  ATF22LV10CZ-25JC  AT93C46A-10TC-2.5

•       ATF16V8C-7PC  AT49F002T-70JC  AT89C52-24QC

•       AT49BV002T-90PC  AT93C66-10SI-2.7  ATF1500ABV-15JC

•       AT93C66-10SC-2.7  AT90LS4433-4AI  AT49F002N-12TI

•       AT90LS4434-4PI  AT90LS4434-4AI  AT93C66  AT93C46

•       T89C51RD2-3CSI-L  T89C51RD2-SLWI-M  AT93C66-10SI-1.8

•       AT93C66-10PI-2.5  ATV2500L-30DM/883  AT93C56-10SI-2.7

•       T89C51RD2-3CBC-M  ATV2500BQL-25KC