{"id":9697,"date":"2026-07-05T09:38:25","date_gmt":"2026-07-05T09:38:25","guid":{"rendered":"https:\/\/materialparts.com\/atsha204a-stucz-t-2\/"},"modified":"2026-07-05T09:38:25","modified_gmt":"2026-07-05T09:38:25","slug":"atsha204a-stucz-t-2","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/atsha204a-stucz-t-2\/","title":{"rendered":"ATSHA204A-STUCZ-T"},"content":{"rendered":"<h2>\u4ea7\u54c1\u6982\u89c8<\/h2>\n<p>The ATSHA204A-STUCZ-T is a SHA-256 CryptoAuthentication chip from Microchip Technology (formerly Atmel). It provides hardware-based cryptographic authentication with up to 16 keys of 256-bit length, a guaranteed unique 72-bit serial number, and 4.5Kb EEPROM. The device uses a single-wire interface and comes in a SOT-23-3 package with full metal shielding for physical attack resistance.<\/p>\n<h2>\u4e3b\u8981\u89c4\u683c<\/h2>\n<ul>\n<li>Algorithm: SHA-256<\/li>\n<li>Key Storage: 16 keys, 256-bit each<\/li>\n<li>Unique ID: 72-bit guaranteed unique serial number<\/li>\n<li>Memory: 4.5Kb EEPROM (16 slots x 32 bytes) + 512-bit OTP<\/li>\n<li>Interface: Single-wire (UART compatible) \/ I2C (1MHz)<\/li>\n<li>Supply Voltage: 2.0V ~ 5.5V<\/li>\n<li>Communication Voltage: 1.8V ~ 5.5V<\/li>\n<li>Sleep Current: &lt;150nA<\/li>\n<li>Active Current: 2mA<\/li>\n<li>Data Retention: 50 years<\/li>\n<li>Package: SOT-23-3<\/li>\n<li>Operating Temperature: -40\u00b0C ~ +85\u00b0C<\/li>\n<li>Security: Full metal shield, tamper detection, no JTAG<\/li>\n<\/ul>\n<h2>\u7279\u70b9<\/h2>\n<ul>\n<li>SHA-256 challenge-response authentication<\/li>\n<li>Guaranteed unique 72-bit serial number<\/li>\n<li>Internal high-quality random number generator<\/li>\n<li>Full metal shield over die for tamper resistance<\/li>\n<li>Single-wire or I2C interface options<\/li>\n<li>Lockable configuration and data zones<\/li>\n<li>4.5Kb EEPROM with 50-year data retention<\/li>\n<li>Ultra-low sleep current (&lt;150nA)<\/li>\n<\/ul>\n<h2>\u5e94\u7528<\/h2>\n<ul>\n<li>Anti-counterfeiting and clone protection<\/li>\n<li>Secure boot and firmware validation<\/li>\n<li>Accessory and consumable authentication<\/li>\n<li>Network access control<\/li>\n<li>Encrypted communication key storage<\/li>\n<li>IoT device identity verification<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Product Overview The ATSHA204A-STUCZ-T is a SHA-256 CryptoAuthentication chip from Microchip Technology (formerly Atmel). It provides hardware-based cryptographic authentication with up to 16 keys of 256-bit length, a guaranteed unique 72-bit serial number, and 4.5Kb EEPROM. The device uses a single-wire interface and comes in a SOT-23-3 package with full metal shielding for physical attack [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,20],"tags":[944],"chip_brand":[134],"class_list":["post-9697","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","tag-atsha204a-stucz-t","chip_brand-microchip"],"acf":{"brief_explanation":"SHA-256 crypto authentication IC, 16x256-bit keys, single-wire interface, SOT-23-3, 2-5.5V, -40~85\u00b0C","date_code":"","package_case":"SOT-23-3","in_stock":2709,"datasheet":"http:\/\/www.microchip.com\/en-us\/product\/ATSHA204A?tab=documents","price":"$0.55 @ 5ku","product_introduction":"The ATSHA204A-STUCZ-T is a SHA-256 cryptographic authentication chip from Microchip with 16 key slots, single-wire interface, and SOT-23-3 package for secure IoT and anti-counterfeiting applications.","working_principle":"The ATSHA204A performs SHA-256 HMAC-based challenge-response authentication. A host sends a random challenge to the device, which combines it with a stored secret key and internal data to compute a SHA-256 digest. The resulting MAC (Message Authentication Code) is returned to the host for verification. The full metal shield and tamper detection circuitry prevent physical attacks.","pin_description":"<table><tr><th>Pin<\/th><th>Name<\/th><th>Function<\/th><\/tr><tr><td>1<\/td><td>VCC<\/td><td>Power supply (2.0-5.5V)<\/td><\/tr><tr><td>2<\/td><td>SDA \/ SIO<\/td><td>Single-wire data \/ I2C data<\/td><\/tr><tr><td>3<\/td><td>GND<\/td><td>Ground<\/td><\/tr><\/table>","application_scenarios":"<ul><li>Printer cartridge authentication<\/li><li>Battery pack verification<\/li><li>Secure boot for embedded processors<\/li><li>IoT endpoint identity<\/li><\/ul>","alternative_models":"<table><tr><th>Model<\/th><th>Manufacturer<\/th><th>Algorithm<\/th><th>Interface<\/th><\/tr><tr><td>ATECC108A-SSHCZ-T<\/td><td>Microchip<\/td><td>ECC P-256<\/td><td>Single-wire\/I2C<\/td><\/tr><tr><td>ATECC608A-MAHDA-S<\/td><td>Microchip<\/td><td>ECC P-256 + AES<\/td><td>I2C<\/td><\/tr><tr><td>DS28C36Q+T<\/td><td>Maxim\/Analog<\/td><td>ECC P-256<\/td><td>I2C<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/9697","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=9697"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/9697\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=9697"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=9697"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=9697"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=9697"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}