SECURED MEMORY 5528 COMPATIBLE CHIP MODULE MALAYSIA

MM23SC5528 or popularly known as 4428/5528 module is a secured memory chip DESIGNED in Malaysia by Malaysia Microelectronic Solutions Sdn Bhd (My-MS). It is widely used in various applications for identification, access control and loyalty cards. We have shipped millions of these modules to various smart card manufacturers & end users worldwide.

Our MM23SC5528 is reliable & robust under normal use and handling. We are able to ship our products within reasonable delivery lead time to meet customers’ expectation. As the product owner, we can customize the manufacturer’s byte code / special header based on customers’ requirement. We offer high quality products at competitive prices.

MM23SC5528 contains 1024 x 8 bits of EEPROM with programmable write protection for each byte. Each byte in the memory has a corresponding protect bit.  The protect bits are only one time programmable and cannot be erased. After the protect bits are enabled (logic 0), the corresponding bytes can never be changed again. A write-protect bit with data-compare function is available for user to verify the data in the memory before enabling the protect bit.

MM23SC5528 also offers two bytes of Programmable Security Code (PSC) against unauthorized memory write/erase operations. All the memory, except for the PSC can always be read, but the memory can be written or erased only after PSC verification. If the user fails to enter the correct PSC in eight consecutive attempts, the device will block any further PSC entry attempts and the memory can never be erased or written again.

FEATURES

• Standard CMOS process
• 1024 X 8 bits EEPROM organization
• Byte-wise addressing
• Byte-wise erase/write
• Irreversible byte-wise write protection
• Single 5V power supply for read and write/erase
• Low power operation: 3 mA typical active current
• 5 ms programming time
• 3-wire serial interface
• 20 KHz serial clock rate
• Contact configuration and serial interface, ISO standard 7816 (Synchronous Transmission) compatible
• High ESD protection : > 5 KV
• High reliability : 500,000 erase/write cycles guaranteed
  • Typical 1 million erase/write  cycles
  • 10 years data retention
• Wide operating temperature range,  -40^oC to +85^oC
• 2-byte Programmable Security Code (PSC) for write/erase protection

BLOCK DIAGRAM
 

MODULE REEL

PACKING METHOD