The 146212-HM1-6551-9 is a 1Kbit SRAM memory integrated circuit. It operates asynchronously and has an access time of 300 ns. This memory chip is volatile, meaning that its data is lost when power is removed. The package type is 22-CDIP with through-hole mounting. The voltage supply range is 4.5V to 5.5V. The memory format is SRAM and it has a write cycle time of 400 ns. The memory interface is parallel. This product is manufactured by Harris Corporation and is part of the HM1-6551 series. It is suitable for use in various electronic devices that require memory storage.