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Microchip Technology AT88SC118-SH-CM-T
- Part No.:
- AT88SC118-SH-CM-T
- Manufacturer:
- Microchip Technology
- Category:
- Specialized ICs
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Description:
- IC SECURITY COMPANION CHIP 8SOIC
- Quantity:
Unit Price:$0
Ext Price:$0
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Product Details
AT88SC118-SH-CM-T - CryptoCompanion Security IC
Microchip Technology AT88SC118-SH-CM-T is a CryptoCompanion device for CryptoRF and CryptoMemory systems in an 8-lead SOIC package (8S1, 8-SOIC). It provides host-side authentication, protected secret storage, and cryptographic support over a two-wire serial interface.
Specifications and ordering-code distinctions are based on the manufacturer's AT88SC118 datasheet and summary datasheet; verify the current product status and system security requirements before a new design.
Overview
The AT88SC118 works with a host controller and compatible CryptoRF or CryptoMemory devices. It keeps host secrets in on-chip nonvolatile memory and performs the authentication, password, and encryption/decryption functions needed by the companion system. The host formats commands and handles communication with the remote device; the AT88SC118 does not communicate with that device directly.
Key Advantages
Protected host secrets
Dedicated nonvolatile memory and hardware security features reduce exposure of authentication material in general-purpose host memory.
Companion authentication
Supports challenge generation, response processing, message authentication codes, and key management for compatible systems.
Flexible provisioning
Provides diversified host-key sets, password sets, configurable user data, and nonvolatile counters.
Simple host connection
Uses a two-wire interface with 5 V-compatible interface pins while the IC itself operates from 2.7 to 3.6 V.
Feature Summary
Cryptographic functions
Implements the CryptoMemory/CryptoRF F2 algorithm, SHA-1-based operations, a 64-bit mutual-authentication protocol, and an on-chip random-number generator.
Protected configuration
Up to sixteen 64-bit diversified host-key sets, eight sets of paired 24-bit passwords, and up to 232 bytes of configurable read/write user data.
Security controls
Includes voltage/frequency monitoring, reset locking, memory scrambling, and delay penalties intended to impede systematic attacks.
Reliability
The manufacturer specifies 100,000 endurance cycles, 10-year data retention, and a 3,000 V minimum HBM ESD rating.
Package & Footprint
The exact ordering code uses the manufacturer's 8S1 8-lead JEDEC SOIC plastic gull-wing package. The customer's registered package name is 8-SOIC; the manufacturer drawing specifies a 1.27 mm nominal lead pitch and 3.81–3.99 mm body width.
- Use the manufacturer's 8S1 package drawing and applicable JEDEC MS-012 variation for land-pattern design.
- Confirm pin-1 orientation and the 1.27 mm lead pitch before assembly.
- Connect pins 3 and 7 to board ground as directed, although they are not internally connected.
The package registry lists 8-SOIC and /upload/package/8-SOIC.jpg; the local JPG is present.
Pin Functions
Manufacturer 8-lead SOIC top-view pinout:
Power-down control; low for normal operation, high for sleep.
Active-low reset input.
Not internally connected; connect to board ground.
Ground reference.
Two-wire serial data; external pull-up required.
Two-wire serial clock; external pull-up required.
Not internally connected; connect to board ground.
2.7–3.6 V supply.
Do not leave the specified NC pins floating on the PCB; follow the manufacturer's connection diagram and power-up guidance.
Key Specifications
| Function | CryptoCompanion for CryptoRF and CryptoMemory |
|---|---|
| Exact ordering option | -SH-CM-T: 00 unlocked initial memory state; tape and reel |
| Supply voltage | 2.7–3.6 V operating range |
| Operating temperature | -40 to +85 °C, industrial range |
| Host interface | Two-wire serial interface, 5 V-compatible pins |
| Maximum SCL frequency | 400 kHz |
| Supply current | 5 mA maximum at 400 kHz, manufacturer DC table |
| Standby current | 15 µA maximum with VIN = VCC or GND, manufacturer DC table |
| Power-down current | Less than 10 µA when PDN is high, per pin description |
| User data | Up to 232 bytes configurable read/write area |
| Endurance / retention | 100,000 cycles / 10 years, manufacturer feature list |
| Package | 8S1 8-lead JEDEC SOIC; registered 8-SOIC |
Values are manufacturer-stated and apply under the datasheet's specified test conditions; distinguish operating limits from typical behavior.
Replacement Considerations
No verified drop-in replacement is identified. The manufacturer's AT88SC118-SH-CM bulk option differs in delivery format; the -SH-CN and -SH-CN-T options differ in initial memory locking. Any alternate requires validation of key provisioning, firmware commands, package, supply, temperature range, and security behavior. No unverified internal product link is provided.
Manufacturer Information
AT88SC118 originated in Atmel's CryptoCompanion family and is documented by Microchip Technology. Consult the manufacturer's controlled datasheet, summary ordering table, package drawing, and current lifecycle notice before committing to a new production design.
Applications
Protected credential systems
Host-side authentication in systems using compatible CryptoRF or CryptoMemory devices.
Secure personalization
Controlled key, password, and user-data provisioning with application-specific locking policy.
Firmware integrity workflows
Hardware-assisted verification of host firmware digests where the full system architecture supports it.
Access and identity designs
Authentication-oriented embedded designs built around the specified companion-device protocol.
Quality & Authenticity
Verify the complete manufacturer ordering code, reel label, package marking, pin orientation, and device memory-lock state against purchase and provisioning records. Electrical and security acceptance should be performed in the actual host-and-companion system.
FAQ
What does the -T suffix indicate?
For the -SH-CM option, the manufacturer ordering table lists -T as tape-and-reel delivery.
Can this IC contact a CryptoRF device directly?
No. Both are two-wire slave devices; the host processor coordinates communication and commands.
Are pins 3 and 7 unused?
They are not internally connected, but the manufacturer's pinout directs designers to connect them to board ground.
Is the CN option interchangeable with CM?
Not automatically. Their initial memory-lock configurations differ, affecting personalization and access policy.
Engineering Notice
This device uses legacy cryptographic algorithms and a specific companion-device protocol. Evaluate the threat model and current manufacturer lifecycle status for new designs. Follow the datasheet for supply ramp, decoupling, two-wire pull-ups, reset/power-down timing, and one-time memory locking. Do not infer system-level security from the IC specification alone.
AT88SC118-SH-CM-T Information
- Specifications
- Tags
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- CryptoCompanion™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Security Companion Chip
- Applications:
- Networking and Communications
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
- Grade:
- -
- Qualification:
- -
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