MR25H256CDCR EverSpin Technologies Inc, MR25H256CDCR Datasheet - Page 2

• Manufacturer Part Number: MR25H256CDCR
• Description: IC MRAM 256KBIT 40MHZ 8DFN
• Manufacturer: EverSpin Technologies Inc
• Series: -r

Specifications of MR25H256CDCR

• Format - Memory: RAM
• Memory Type: MRAM (Magnetoresistive RAM)
• Memory Size: 256K (32K x 8)
• Speed: 40MHz
• Interface: SPI Serial
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Word Size: 8b
• Organization: 32Kx8
• Density: 256Kb
• Interface Type: Serial (SPI)
• Operating Supply Voltage (typ): 3.3V
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 2.7V
• Operating Temp Range: -40C to 85C
• Pin Count: 8
• Mounting: Surface Mount
• Lead Free Status / Rohs Status: Supplier Unconfirmed

MR25H256
1. DEVICE PIN ASSIGNMENT
Overview
The MR25H256 is a serial MRAM with memory array logically organized as 32Kx8.
The serial interface is pin compatible with the standard serial peripheral interface (SPI) bus. Serial MRAM im-
plements a subset of commands common to today’s SPI EEPROM and Flash components. This allows MRAM
to replace these components in the same socket and interoperate on a shared SPI bus. Serial MRAM offers
superior write speed, unlimited endurance, low standby & operating power, and more reliable data retention
compared to available serial memory alternatives.
Figure 1.1 Block Diagram
Instruction Decode
WP
Clock Generator
CS
Control Logic
HOLD
Write Protect
SCK
32KB
MRAM ARRAY
Instruction Register
15
8
Address Register
Counter
SO
Data I/O Register
SI
4
Nonvolatile Status
Register
Everspin Technologies © 2010
2
Document Number: MR25H256 Rev. 2, 4/2010