Analog Devices Inc./Maxim Integrated DS28E16Q+U

DS28E16 supplies SHA-3 challenge-response authentication over a single-contact 1-Wire bus. Its 256-bit secured user EEPROM, protected secret storage, 17-bit one-time-settable decrement-only counter, and unique 64-bit ROM ID support identity, use management, and authenticated data workflows. The device is a 1-Wire slave, not a bus master; a compatible host or coprocessor controls the network.

The LCDChip record states 6-WDFN Exposed Pad. Analog Devices lists DS28E16Q+U in a thin dual flatpack no-leads exposed-pad package, and the DS28E16 data sheet depicts the Q family as a six-pin 3 mm × 3 mm TDFN-EP. Confirm the exact package drawing and land pattern for the U ordering option before PCB release.

Mechanical checks

• Confirm the top-view pin-1 index and body dimensions.
• Solder the exposed pad evenly to the board ground plane.
• Do not connect pins marked DNC.

The registered package JPG is currently unavailable on the production website. Verify the footprint against the controlled manufacturer drawing.

For the six-pin TDFN-EP package, the manufacturer's top-view pin description specifies:

This pin assignment is for the six-pin TDFN-EP; it must not be transferred to the WLP or SFN package options.

Apply the full electrical, timing, pull-up, and strong-pullup conditions in the current data sheet rather than treating these summary values as complete design limits.

Match the security algorithm and key-management process, ROM and command protocol, protected-memory map, counter behavior, 1-Wire timing and power delivery, operating range, and exact package pinout. A related SHA-3 device is not automatically interchangeable. No unverified LCDChip alternative-product link is asserted here.

Analog Devices lists DS28E16Q+U within the Maxim Integrated DS28E16 family. The manufacturer provides the DS28E16 product page, Rev. 2 data sheet, Security User Guide, package documents, and lifecycle notices; use those controlled sources to verify the ordering suffix and application requirements.

Check the full DS28E16Q+U code, marking, lot traceability, package integrity, and manufacturer notices. A successful security deployment also requires controlled secret injection, host-side verification, and a review of attack and failure handling.

Verify the 1-Wire pull-up network, strong-pullup energy delivery, host command sequence, key provisioning, exposed-pad ground connection, DNC handling, and exact Q+U package documentation before manufacturing. The registered production package JPG is missing and must be supplied and checked before publication.