M95256-R-256 Kbit SPI总线EEPROM，带高速时钟

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产品概述

描述

The M95256 devices are electrically erasable programmable memories (EEPROMs) organized as 32768 x 8 bits, accessed through the SPI bus.

The M95256-W can operate with a supply voltage from 2.5 V to 5.5 V, the M95256-R can operate with a supply voltage from 1.8 V to 5.5 V and the M95256-DF can operate with a supply voltage from 1.7 V to 5.5 V, over an ambient temperature range of -40 °C / +85 °C.

The M95256-DF, -DR or -DW (hereinafter referred to as M95256-Dx) offer an additional page, named the Identification page (64 bytes). The Identification page can be used to store sensitive application parameters that can be (later) permanently locked in read-only mode.

The SPI bus signals are C, D and Q, as shown in Figure 1 and Table 1. The device is selected when Chip select (S) is driven low. Communications with the device can be interrupted when the HOLD is driven low.

所有功能

• Compatible with the serial peripheral interface (SPI) bus
• Memory array
  • 256-Kbit (32 Kbytes) of EEPROM
  • Page size: 64 bytes
  • Additional write lockable page (Identification page)
• Write time
  • Byte Write within 5 ms
  • Page Write within 5 ms
• Write protect
  • quarter array
  • half array
  • whole memory array
• High-speed clock: 20 MHz
• Single supply voltage:
  • 2.5 V to 5.5 V for M95256-W
  • 1.8 V to 5.5 V for M95256-R
  • 1.7 V to 5.5 V for M95256-DF

• Operating temperature range: from -40 °C up to +85 °C
• Enhanced ESD protection
• More than 4 million Write cycles
• More than 200-year data retention
• Packages
  • SO8N (ECOPACK2)
  • TSSOP8 (ECOPACK2)
  • UFDFPN8 (ECOPACK2)
  • WLCSP8 (ECOPACK2)

电路原理图