Microchip Technology CEC1702Q-B2-I/SX

Overview

CEC1702Q-B2-I/SX from Microchip Technology is a cryptographic embedded controller featuring an ARM Cortex-M4F core with hardware FPU, 480KB SRAM (416KB + 64KB), 64KB boot ROM, and integrated AES/SHA/RSA cryptographic engines. It supports dual power planes (VBAT/VTR), operates at 3.3V/1.8V, and delivers secure boot, RTC, PWM, ADC, I²C, UART, and Quad SPI for IoT platform management.

For engineers reviewing the CEC1702Q-B2-I/SX datasheet, CEC1702Q-B2-I/SX pinout, CEC1702Q-B2-I/SX application, or CEC1702Q-B2-I/SX equivalent, key selection criteria include VBAT-backed real-time functions, hardware-accelerated crypto (AES-256, SHA-512, RSA-4096), 65 GPIOs with programmable drive strength, and 84-pin WFBGA packaging for space-constrained embedded security subsystems.

Technical Context

The CEC1702Q-B2-I/SX implements a tightly coupled ARM Cortex-M4F core with NVIC supporting 240 interrupt sources, MPU, and full debug infrastructure (SWJ-DP, DWT, ITM, TPIU). Its memory subsystem includes two SRAM blocks-416KB for code and 64KB for data-plus 128-byte battery-backed RAM accessible during deep sleep.

Cryptographic acceleration is provided by three dedicated engines: AES (ECB/CBC/CTR/OFB, 128–256-bit keys), SHA (SHA-1/256/512), and Public Key (RSA up to 4096-bit, ECC up to 640-bit), all sharing DMA access to SRAM. The device integrates VBAT-powered peripherals including RTC, week timer, hibernation timers, and two VCI_IN# wake-up inputs with latching support.

Key Specifications

Pinout & Package

CEC1702Q-B2-I/SX uses an 84-pin WFBGA package with 0.5mm pitch, RoHS-compliant, designed for high-density IoT motherboard integration. Power domains include VBAT (battery backup), VTR (standby), VTR_PLL, VTR_ANALOG, VSSx, and VR_CAP (1µF decoupling required).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar cryptographic embedded controller applications.

Compared with CEC1702Q-B1-I/SX, the CEC1702Q-B2-I/SX enables reliable operation at 105°C ambient, critical for thermally constrained enclosures; versus CEC1702Q-B2-E/SX, it provides factory-provisioned cryptographic identity for zero-touch onboarding in cloud-managed IoT fleets.

Availability

CEC1702Q-B2-I/SX is available at Aetrix Electronics and suitable for server platform management, industrial gateway security, smart building controllers, and medical device secure boot requiring stable component supply across long-lifecycle deployments.

Supply support for CEC1702Q-B2-I/SX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a leading provider of microcontrollers, analog components, and security solutions, headquartered in Chandler, Arizona.

The CEC1702Q-B2-I/SX belongs to Microchip's Cryptographic Embedded Controller product line, engineered specifically for secure, low-power, autonomous management of IoT and server platforms with integrated hardware root of trust.

FAQ

What is the operating temperature range of the CEC1702Q-B2-I/SX?

The CEC1702Q-B2-I/SX is rated for an extended industrial temperature range of −40°C to +105°C, validated across all core functions including VBAT-powered RTC, cryptographic engines, and GPIO operation. This specification ensures reliable performance in thermally demanding environments such as enclosed server chassis, automotive gateways, and outdoor industrial enclosures where ambient temperatures exceed standard industrial limits.

Does the CEC1702Q-B2-I/SX support secure boot from external SPI flash?

Yes, the CEC1702Q-B2-I/SX implements a hardware root of trust with a boot ROM secure loader that authenticates and loads firmware images from external SPI flash. It supports both standard and quad SPI interfaces, verifies digital signatures using its integrated public key engine, and optionally decrypts AES-256 encrypted images before execution-ensuring firmware integrity and confidentiality at every boot cycle of the CEC1702Q-B2-I/SX.

How many independent PWM outputs does the CEC1702Q-B2-I/SX provide?

The CEC1702Q-B2-I/SX provides seven independent 16-bit PWM outputs, each with programmable 'on' and 'off' counters, optional inverted polarity, and DMA-driven burst capability. Two of these outputs (LED0/LED1) are optimized for breathing/brightening LED control with piecewise-linear brightness curves, while the remaining five support general-purpose motor control, fan speed regulation, or analog signal generation in the CEC1702Q-B2-I/SX.

Can the CEC1702Q-B2-I/SX maintain real-time clock functionality during main power loss?

Yes, the CEC1702Q-B2-I/SX retains full RTC operation-including time-of-day/calendar registers, programmable alarms, leap year correction, and daylight savings time-using only VBAT power. Its 32.768kHz crystal oscillator, RTC registers, and 128-byte battery-backed SRAM remain fully functional during complete VTR power loss, enabling uninterrupted timekeeping and wake-up events for the CEC1702Q-B2-I/SX in battery-backed or energy-harvesting systems.

What cryptographic algorithms are accelerated in hardware by the CEC1702Q-B2-I/SX?

The CEC1702Q-B2-I/SX integrates three dedicated hardware engines: AES supports ECB/CBC/CTR/OFB modes with 128/192/256-bit keys; SHA supports SHA-1, SHA-256, and SHA-512; and the Public Key Engine accelerates RSA (1024–4096 bits) and ECC (prime/binary fields up to 640 bits). All engines share DMA access to SRAM and operate independently of the ARM core, enabling concurrent crypto processing in the CEC1702Q-B2-I/SX.