Microchip Technology SHA104-SSVDA-T

The SHA104 stores a symmetric secret in protected hardware and supports message authentication code generation for challenge-response designs. It can be paired with a host microcontroller or a host-side security device. The SSVDA variant uses a two-wire I2C connection; do not substitute the single-wire S S V C Z variant without redesigning the host interface.

Microchip identifies SHA104-SSVDA-T as an 8-lead, 0.150-inch-wide-body JEDEC SOIC with I2C and tape-and-reel ordering media. The manufacturer example lists 3,300 devices per reel. LCDChip's registered package name is 8-SOIC; use Microchip's controlled package drawing for dimensions and land pattern.

Layout checks

• Orient the package from Microchip's top-view pin drawing.
• Route SDA and SCL with suitable I2C pull-up resistors for the bus.
• Leave pins marked NC unconnected.

The photograph is a generic package-view aid, not a device-specific pin map.

The Microchip summary data sheet gives the following top-view pin assignments for the I2C 8-lead SOIC.

The single-wire ordering option uses a different serial connection; verify the complete suffix before PCB release.

Limits and electrical conditions should be checked in the latest controlled Microchip data sheet before design sign-off.

Do not treat another SHA104 suffix as a direct substitute without confirming interface type, package, provisioning state and ordering media. In particular, the CZ single-wire option is not a pin-for-pin I2C replacement. No unverified internal alternative link is asserted.

Microchip Technology documents the SHA104 in CryptoAuthentication Summary Data Sheet DS40002467B and lists the SHA104 product family as in production. The summary is public; Microchip notes that the complete data sheet is available under NDA through its sales channel.

Verify the complete ordering code, supplier traceability and manufacturer documentation. Microchip cautions that crypto-device top markings are intentionally vague and may vary with assembly lot, so package marking alone should not be used as an incoming identity test. Establish a controlled key-provisioning and verification process.

Review Microchip's latest controlled SHA104 data sheet, electrical limits, interface timing, security guidance and SOIC package drawing before schematic, firmware or PCB release. Confirm the exact SHA104-SSVDA-T suffix and provisioning requirements for the intended application. This page does not replace the manufacturer documentation or a system-level security review.