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Microchip Technology SHA104-TFLXAUTHS
- Part No.:
- SHA104-TFLXAUTHS
- Manufacturer:
- Microchip Technology
- Category:
- Specialized ICs
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Description:
- TRUST FLEX CLIENT MAC, 105C, I2C
- Quantity:
Unit Price:$0
Ext Price:$0
- Payment:
- Shipping:
Product Details
SHA104-TFLXAUTHS - TrustFLEX I2C Authentication IC
SHA104-TFLXAUTHS from Microchip Technology is the 8-lead SOIC, I2C variant of the pre-configured TrustFLEX SHA104 client-side symmetric authentication device.
Technical basis: Microchip SHA104-TFLXAUTH CryptoAuthentication Data Sheet DS40002505B. No current price or inventory claim is included.
Overview
The SHA104-TFLXAUTH family targets accessory, disposable and ecosystem-control authentication. This exact -S ordering code selects the 8-lead SOIC package with I2C; a -CZ suffix would select Microchip's PWM single-wire interface. The client stores a protected symmetric secret and generates a message authentication code for a compatible host-side verifier such as SHA105-TFLXAUTH. Authentication still depends on correct shared-key provisioning and a complete host protocol.
Key Advantages
The symmetric authentication key is held in dedicated secure hardware.
Standard-mode and fast-mode I2C support familiar embedded host designs.
A pre-configured security policy supports Microchip provisioning services.
The S ordering suffix selects the 8-lead narrow-body SOIC package.
Feature Summary
Generates a symmetric authentication response to a host challenge.
Stores one symmetric secret and 384 bytes of user data under device policy.
Each device has a unique 72-bit serial number.
Includes a true random-number generator and monotonic counter.
Package & Footprint
The registered package is 8-SOIC (0.154", 3.90mm Width). Microchip identifies the S option as an 8-lead, approximately 0.150-inch wide-body SOIC. The local image is a generic package illustration and is not a controlled footprint or marking reference.
- Use the current Microchip mechanical drawing for the land pattern.
- Check pin-1 orientation and supply decoupling.
- Size SDA and SCL pull-ups for the actual bus voltage and capacitance.
Pin Functions
For this I2C SOIC option, pins 1, 2, 3 and 7 are NC; pin 4 is GND; pin 5 is SDA; pin 6 is SCL; and pin 8 is VCC. Confirm the top-view package orientation before PCB release.
Key Specifications
| Exact order code | SHA104-TFLXAUTHS |
|---|---|
| Manufacturer | Microchip Technology |
| Trust option | Pre-configured TrustFLEX AUTH client |
| Package | 8-lead SOIC; registered 8-SOIC (0.154", 3.90mm Width) |
| Interface | I2C, up to 400 kHz fast mode |
| Supply voltage | 1.65 V to 5.5 V under specified conditions |
| Operating temperature | -40°C to +105°C |
| Authentication | Client-side symmetric message authentication code |
| Protected storage | One symmetric secret key |
| User EEPROM | 384 bytes |
| Unique serial number | 72 bits |
| Monotonic counter | Up to 10,000 increments |
Review the complete manufacturer electrical and provisioning specifications for an actual design.
Replacement Considerations
The I2C SHA104-TFLXAUTHS is not interface-compatible with the -CZ single-wire option without board and firmware changes. It is a client device, not a host-side SHA105 verifier. Compare keys, policy, package and protocol before substitution. No unverified internal alternative link is included.
Manufacturer Information
Microchip's SHA104-TFLXAUTH data sheet DS40002505B identifies SHA104-TFLXAUTHS as the provisioned 8-lead SOIC I2C order code. The family supports secure key provisioning and client-side MAC authentication. Consult current manufacturer documents, errata and approved provisioning records for production decisions.
Applications
Generate a client response for a protected host-side check.
Verify replaceable items in a defined system policy.
Authenticate provisioned peripherals before enabling selected functions.
Integrate the secure client on a two-wire host bus.
Quality & Authenticity
Verify the exact -TFLXAUTHS code, marking, lot traceability and expected provisioning state. The generic package picture does not establish authenticity. Validate MAC behavior against a known compatible host and a documented acceptance test.
FAQ
Is this the I2C option?
Yes. The no-CZ SOIC order code uses I2C; the -CZ suffix denotes SWI.
Is it the host verifier?
No. SHA104 generates the client-side response; SHA105 or another compatible host device can verify it.
Does it use asymmetric ECC?
No such claim is made for this symmetric SHA104 authentication device.
Can any SHA105 part verify it?
The key relationship and protocol must match the actual provisioned devices.
Engineering Notice
Authentication requires protected provisioning, correct host verification and an appropriate response to failure. Check bus voltage, pull-ups, power sequencing, current Microchip errata and the complete credential lifecycle in the final system.
SHA104-TFLXAUTHS 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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