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As we all know, SLE4442 is the most common chip that used in security area. The striking advantages are stable function and the most cost-efficient price! Of course, RealSmart is the giant player for such chips! Except the above advantages, fast delivery, strong package etc. always is our duties!

General Description:

SLE 4442 provides a security code logic which controls the write/erase access to the memory. For this purpose the SLE 4442 contains a 4-byte security memory with an Error Counter EC (bit 0 to bit 2) and 3 bytes reference data. These 3 bytes as a whole are called Programmable Security Code (PSC). After power on the whole memory, except for the reference data, can only be read. Only after a successful comparison of verification data with the internal reference data the memory has the identical access functionality of the SLE 4432 until the power is switched off. After three successive unsuccessful comparisons the Error Counter blocks any subsequent attempt and hence any possibility to write and erase.

Technical Features:

  • 256 * 8-bit EEPROM organization
  • Byte-wise addressing
  • Irreversible byte-wise write protection of lowest
  • 32 addresses (Byte 0 ... 31) 32*1-bit organization of protection memory
  • Two-wire link protocol
  • End of processing indicated at data output
  • Answer-to-Reset acc. to ISO standard 7816-3
  • Programming time 2.5 ms per byte for both erasing and writing
  • Minimum of 104 write/erase cycles
  • Data retention for minimum of ten years
  • Contact configuration and serial interface in accordance with ISO standard 7816 (synchronous transmission)

Ordering Information

Delivery Terms

  • Samples: It’s free of charge and could be sent within 1-2 working days.
  • <10K pcs: Within 1-2 working days
  • <100K pcs: Within 2-3 working days
  • <1KK pcs: Within 15 working days.
  • >1KK pcs: On request

Payment Terms

  • TT in advance or LC
  • Others on requested

Why buy from us ?

  • Reply you within 12 hours at most time
  • Unsurpassable competitive price
  • Large quantity inventory always
  • No MOQ limit for SLE4442 chips
  • Strong at customization on request
  • Experience and expertise
  • Fast delivery and strong package


View Package!

Contact Us

Shanghai RealSmart Technologies Co., Ltd.

R201, Bldg E, No. 50, Lane 2080 Lianhua Rd, Minhang Dist, Shanghai 201103, China

Tel: +86 21 6432 6941

Fax: +86 21 6432 6942


Tel: +86 21 6432 6941