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EC25C256NM1GR Datasheet(PDF) 1 Page - E-CMOS Corporation |
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EC25C256NM1GR Datasheet(HTML) 1 Page - E-CMOS Corporation |
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1 / 18 page  E-CMOS Corp. (www.ecmos.com.tw) Page 1 of 18 4J09N-Rev.F001 EC25C256 256Kbits SPI Serial EEPROM General Description The EC25C256 is an industrial standard electrically erasable programmable read only memory (EEPROM) Product that utilizes standard Serial Peripheral Interface (SPI) for communications. The EC25C256 contains a memory array of 256K bits (32,768x 8), which is organized in 64 bytes per page. This EEPROM operates in a wide voltage range from 1.7V to 5.5V,which fits most application. The device provides low-power operations and low standby current. The product is offered in Lead-free, RoHS, halogen free or Green package. The available package types are 8-pin SOP, TSSOP and UDFN. The functionalities of the EC25C256 are optimized for most applications, such as consumer electronics, wireless, telecommunication, industrial, medical ,instrumentation, commercial and others, where low-power and low-voltage Are vital. This product has a compatible SPI interface: Chip-Select ( CS ), Serial Data In (SI), Serial Data Out (SO) and Serial Clock (SCK) for high-speed communication. Furthermore, a Hold feature via HOLD pin allows the device entering into a suspended state whenever necessary and resuming the communication without re-initializing the serial sequence. A Status Register facilitates a flexible write protection mechanism and device Status monitoring. The EC25C256 also offers an additional page, named the Identification Page(64 bytes) which can be written and (later) permanently locked in Read-only mode. This Identification Page offers flexibility in the application board production line, as the Identification Page can be used to store unique identification parameters and/or parameters specific to the production line. In order to refrain the state machine from entering into a Wrong state during power-up sequence or a power toggle off-on condition, a power on reset circuit is implemented. During power-up, the device does not respond to any instructions until the supply voltage (VCC)has reached an acceptable stable level above the reset threshold voltage. Once VCC passes the power on reset threshold, the device is reset and enters into Standby mode. This should also avoid any inadvertent Write operations during power-up stage. During power- down process, the device will enter into standby mode, once VCC drops below the power on reset threshold voltage. In addition, the device will be in standby mode after receiving the Stop command, provided that no internal write operation is in progress. Nevertheless, it is illegal to send a command unless the VCC is within its operating level. |
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