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Microchip Technology SHA104-TFLXAUTHS-CZ
- Part No.:
- SHA104-TFLXAUTHS-CZ
- Manufacturer:
- Microchip Technology
- Category:
- Specialized ICs
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Description:
- TRUST FLEX CLIENT MAC, 105C, SIN
- Quantity:
Unit Price:$0
Ext Price:$0
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- Shipping:
Product Details
SHA104-TFLXAUTHS-CZ - TrustFLEX Single-Wire Authentication IC
SHA104-TFLXAUTHS-CZ from Microchip Technology is the 8-lead SOIC, single-wire-interface variant of the pre-configured TrustFLEX SHA104 client-side symmetric authentication device.
Technical basis: Microchip SHA104-TFLXAUTH CryptoAuthentication Data Sheet DS40002505B, including its exact product identification table. No current price or inventory claim is included.
Overview
SHA104-TFLXAUTHS-CZ is a client-side CryptoAuthentication IC intended for accessory, disposable and ecosystem-control designs. It stores a protected symmetric secret and generates a message authentication code for host-side validation. Microchip identifies the complete -S-CZ order code as an 8-lead SOIC device with a proprietary PWM single-wire interface (SWI), not I2C. It can be paired with a suitably provisioned SHA105 host-side device or another compatible verifier.
Key Advantages
The authentication secret is stored within secure hardware rather than exposed in application firmware.
The CZ variant reduces interface wiring to a proprietary PWM serial data connection.
The pre-configured device supports Microchip secure key-provisioning services.
The S variant uses an 8-lead narrow-body SOIC package.
Feature Summary
Client-side authentication response supports a shared-secret challenge-response design.
One symmetric secret and 384 bytes of user memory are available under device policy.
Each unit has a unique 72-bit serial number.
A monotonic counter and internal true random-number generator support secure workflows.
Package & Footprint
The registered package is 8-SOIC (0.154", 3.90mm Width). Microchip's S order-code option is an 8-lead, approximately 0.150-inch wide-body SOIC. The local image is a generic package illustration, not a controlled mechanical drawing or proof of component identity.
- Use the current Microchip drawing for footprint and pin-1 orientation.
- Route the single-wire SI/O connection, not an I2C clock.
- Check pull-up, timing and power-mode requirements in the data sheet.
Pin Functions
For the SWI-PWM SOIC option, pins 1, 2, 3, 6 and 7 are NC; pin 4 is GND; pin 5 is SI/O; pin 8 is VCC. Pin 6 is not an I2C clock on this -CZ variant. Check the manufacturer top-view diagram before PCB release.
Key Specifications
| Exact order code | SHA104-TFLXAUTHS-CZ |
|---|---|
| Manufacturer | Microchip Technology |
| Trust option | TrustFLEX AUTH, client-side symmetric authentication |
| Package | 8-lead SOIC; registered 8-SOIC (0.154", 3.90mm Width) |
| Serial interface | Proprietary PWM single-wire interface (SWI); CZ option |
| Maximum SWI bit rate | 125 kbps |
| Supply voltage | 1.65 V to 5.5 V under specified operating conditions |
| Operating temperature | -40°C to +105°C |
| Protected storage | One symmetric secret key; 384-byte user EEPROM |
| Unique serial number | 72 bits |
| Monotonic counter | Up to 10,000 increments |
| Nominal sleep current | 130 nA under stated data-sheet conditions |
Electrical and timing values depend on supply, temperature and power mode; consult the complete manufacturer specifications.
Replacement Considerations
The -CZ SWI device is not interface-compatible with the otherwise similar I2C SHA104-TFLXAUTHS without a host and board change. Confirm provisioned key relationship, firmware protocol, voltage, footprint and package before substitution. No unverified internal alternative link is included.
Manufacturer Information
Microchip's SHA104-TFLXAUTH data sheet DS40002505B lists SHA104-TFLXAUTHS-CZ as the 8-lead SOIC, SWI interface order code. The SHA104 is a pre-configured TrustFLEX client device and may be used with an appropriately provisioned SHA105 or another compatible host-side CryptoAuthentication device. Refer to current Microchip data, errata and provisioning documentation for a production design.
Applications
Generate a client response for a host-side verifier.
Authenticate replaceable products in a defined system policy.
Validate provisioned peripherals before enabling selected features.
Use a SWI connection where a two-line I2C interface is unsuitable.
Quality & Authenticity
Verify the complete -TFLXAUTHS-CZ code, marking, lot traceability, interface mode and expected provisioning state. The generic package illustration does not establish identity. Validate MAC responses and counter policy with a known compatible host implementation.
FAQ
Does CZ mean I2C?
No. CZ denotes the Microchip PWM single-wire serial option; the no-CZ SOIC version uses I2C.
Is this a host-side verifier?
No. SHA104 generates the client-side MAC; a compatible host device such as SHA105 can validate it.
Can it operate using parasitic power?
The SWI mode supports a parasitic-power option, subject to the specified circuit and timing conditions.
Is it a drop-in I2C replacement?
No. Interface signaling and pin use differ, so hardware and firmware must be checked.
Engineering Notice
The security outcome depends on controlled provisioning, key handling, host enforcement and a correctly implemented challenge-response protocol. Check the latest Microchip electrical limits, SWI timing, power-mode circuit and errata in the actual product design.
SHA104-TFLXAUTHS-CZ Information
- Specifications
- Tags
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- CryptoAuthentication™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Type:
- Authentication Chip
- Applications:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
- Grade:
- -
- Qualification:
- -
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