Infineon Technologies SAF-C868P-1SR BA

Overview

SAF-C868P-1SR BA from Infineon Technologies is an 8-bit single-chip microcontroller based on the C800 core, fully compatible with the 8051 architecture and extended with eight datapointers. It features 8 KB on-chip program RAM, 256 B on-chip RAM, a 5-channel 8-bit ADC, three 16-bit timers, and operates at up to 40 MHz CPU clock (300 ns instruction cycle @37.5 MHz) with 3.3 V supply and internal 2.5 V core regulation. It targets embedded control in industrial sensors and motor interface modules.

For engineers reviewing the SAF-C868P-1SR BA datasheet, SAF-C868P-1SR BA pinout, SAF-C868P-1SR BA application, or SAF-C868P-1SR BA equivalent, key selection considerations include its P-TSSOP-38 package, 16-bit capture/compare PWM capability, UART-based host communication, brown-out detection, and power-down wake-up via INT0/RxD - all confirmed in the May 2003 Infineon data sheet.

Technical Context

The SAF-C868P-1SR BA implements the C800 core as an 8051 superset with eight independent datapointers for efficient memory addressing across XRAM and ROM. Its timer subsystem includes Timer 0/1 (C501-compatible), Timer 2 (16-bit up/down counter), and dual 16-bit capture/compare units supporting synchronized PWM generation and ADC start triggers.

It integrates a full-duplex UART, 5-channel 8-bit ADC with conversion start synchronization to capture/compare events, four external interrupts, and four priority-level interrupt vectors. Power management includes slow-down, idle (with slow-down), and power-down modes with wake-up on INT0 or RxD - all managed under a single 3.3 V supply with internal voltage regulation to 2.5 V for the core.

Key Specifications

Pinout & Package

SAF-C868P-1SR BA is packaged in P-TSSOP-38-1 (plastic thin shrink small outline package, 38-pin, 0.5 mm pitch). Pin functions are validated per Figure 3 of the May 2003 Infineon data sheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SAF-C868P-1SR BA, the SAK variant offers extended temperature reliability without functional trade-offs, while the -1SG version reduces cost where thermal margin allows - enabling direct substitution based solely on environmental requirements.

Availability

SAF-C868P-1SR BA is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and automotive body control units requiring stable component supply and long-term lifecycle support.

Supply support for SAF-C868P-1SR 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 industrial automation and automotive body electronics where 8051 compatibility and integrated peripherals are essential.

FAQ

What is the maximum operating frequency of the SAF-C868P-1SR BA?

The SAF-C868P-1SR BA supports an internal CPU clock up to 40 MHz, with a minimum external crystal frequency of 6.67 MHz and maximum of 10.67 MHz at 50% duty cycle. At 37.5 MHz CPU clock, it achieves a 300 ns instruction cycle time - confirmed in Section "C868 Advance Information" of the May 2003 Infineon data sheet.

Does the SAF-C868P-1SR BA support in-system programming?

Yes - it includes a 4 KB Boot ROM that enables in-system programming of both XRAM (for C868-1R variants) and XRAM/Program RAM (for C868-1S variants like the -1SR). This allows firmware updates without removing the device from the PCB, as documented in the "Advance Information" section of the May 2003 data sheet.

What are the power supply requirements for SAF-C868P-1SR BA?

The device requires a single 3.3 V supply (VDDP/VSSP) for I/O and analog circuitry, with an internal voltage regulator generating 2.5 V for the core (VDDC/VSSC). VAREF and VAGND must be decoupled separately to ensure ADC accuracy. These specifications are defined in the "Electrical Characteristics" summary on page 6 of the May 2003 data sheet.

Is the SAF-C868P-1SR BA pin-compatible with other C868 variants?

Yes - all C868 variants in the P-TSSOP-38 package (including -1SR, -1SG, -1RR, -1RG) share identical pinouts and electrical characteristics. Differences are limited to memory type (ROM vs. RAM), temperature grade, and screening level - verified in Figures 3 and 4 and the package listing on page 6 of the May 2003 data sheet.