Atmel Corporation has launched its ATF15xxBE family of RoHS-compliant, 1,8 V CPLDs with standby power consumption of just 5 micro-amps claimed to be over 60% less power drain than the nearest competing CPLD.
Operating power consumption is 1 mA at 20 MHz or less.
Available in densities ranging from 32 to 128 macrocells, these devices can be used to implement system watchdog, MCU I/O port expansion, memory interface, LCD display module drivers and voltage translators. Their ultra-low standby power consumption makes them ideal for applications that spend the majority of their time in standby mode, such as smartphones, keypad scanners and handheld appliances, as well as toys using infrared transmitters with low security needs. They also offer up to 32 Kbits of on-chip EEPROM for the storage of constants, OEM proprietary data, end-product ID or other data.
ATF15xxBE CPLDs have a unique macrocell architecture with independent feedback paths for both the register and combinatorial logic that fully exploits macrocell resources. Conventional CPLDs incorporate macrocells that have only one feedback path. If the register is being used to latch data, the combinatorial logic in that cell cannot be utilised at all. Atmel's dual-path architecture allows both register and combinatorial macrocell resources to be fully utilised virtually all the time, in effect doubling the amount of available logic, and frequently allowing designers to implement their system in a smaller, less expensive device. This logic doubling is automatic; Atmel's ProChip Designer fitter automatically checks CPLD resource utilisation and implements logic doubling without any user action.
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