Infineon Technologies SAK-C868-1SG BA

Overview

SAK-C868-1SG BA from Infineon Technologies is an 8-bit single-chip microcontroller based on the C800 core (8051 superset), featuring 8 KB on-chip Program RAM, 256-byte on-chip RAM, 256-byte XRAM, and a 40 MHz internal CPU clock with 300 ns instruction cycle time at 37.5 MHz. It integrates an 8-bit UART, three 16-bit timers, a 5-channel 8-bit ADC, and a 3-channel 16-bit capture/compare unit for PWM generation. Used in industrial motor control and embedded sensor interface modules.

For engineers reviewing the SAK-C868-1SG BA datasheet, SAK-C868-1SG BA pinout, SAK-C868-1SG BA application, or SAK-C868-1SG BA equivalent, key selection considerations include its -40°C to +125°C operating range, P-TSSOP-38 package, 3.3 V single-supply operation with internal 2.5 V core regulator, brown-out detection, and power-down mode with INT0/RxD wake-up capability.

Technical Context

The C868 implements an enhanced 8051-compatible architecture with eight datapointers and dual memory spaces (ROM/RAM/XRAM), enabling efficient data movement across memory banks. Its timer subsystem includes Timer 0/1 (C501-compatible) and Timer 2 (16-bit up/down counter), with Timer 1 or 2 configurable as serial baudrate generators.

The analog subsystem features five independent 8-bit ADC channels with conversion start synchronization to capture/compare events (Timer 12/13), while the 3-channel 16-bit capture/compare unit supports precise PWM signal generation and input capture for timing-critical edge detection in motor commutation or encoder interfacing.

Key Specifications

Pinout & Package

Packaged in P-TSSOP-38-1 (38-pin thin shrink small outline package), lead-free and RoHS-compliant, rated for -40°C to +125°C ambient operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with SAK-C868-1SG BA, the -1SR BA trades programmability for lower cost and fixed functionality, while the -1SG BA's successor (-1SG BA) adds robustness and data retention - making the original ideal for field-upgradable industrial controllers needing flexibility without automotive qualification overhead.

Availability

SAK-C868-1SG BA is available at Aetrix Electronics and suitable for industrial motor control, embedded sensor interface, automotive body electronics, and PLC I/O modules requiring stable component supply across extended temperature ranges.

Supply support for SAK-C868-1SG BA 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

Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive ICs, and microcontrollers, with global R&D and manufacturing infrastructure.

The C868 belongs to the C800 family of 8-bit microcontrollers designed for cost-sensitive, real-time embedded control in harsh environments - emphasizing mixed-signal integration, wide temperature operation, and in-field programmability.

FAQ

What is the maximum operating frequency of the SAK-C868-1SG BA CPU core?

The SAK-C868-1SG BA supports an internal CPU clock up to 40 MHz, with a minimum instruction cycle time of 300 ns achievable at 37.5 MHz. External crystal frequency must be 6.67–10.67 MHz with 50% duty cycle, feeding an internal PLL that multiplies to the final CPU clock. This timing enables deterministic execution of motor control loops within 10 µs.

Does the SAK-C868-1SG BA support in-system programming (ISP)?

Yes - the SAK-C868-1SG BA includes a 4 KB Boot ROM that enables in-system programming of its 8 KB on-chip Program RAM via UART. This allows firmware updates in the field without removing the device from the PCB or using external programming hardware, a key advantage over ROM-based variants like the -1SR BA.

How many ADC channels does the SAK-C868-1SG BA have, and can they be triggered synchronously?

The device integrates five independent 8-bit ADC channels. Conversion start can be hardware-synchronized to events from Timer 12 or Timer 13 - specifically to capture/compare unit transitions - ensuring precise alignment between PWM edge timing and analog sampling for current sensing in motor drives.

What power supply configuration is required for reliable operation?

SAK-C868-1SG BA requires a single 3.3 V supply on VDDP/VSSP for I/O and digital logic, with an internal voltage regulator generating a clean 2.5 V core supply (VDDC/VSSC). Analog circuitry uses separate VAREF and VAGND pins; proper decoupling (100 nF ceramic + 10 µF tantalum per supply pair) is mandatory to maintain ADC accuracy and CPU stability across temperature.