Infineon Technologies SAA-XC866L-2FRA 5V BE

Overview

SAA-XC866L-2FRA 5V BE from Infineon Technologies is an 8-bit single-chip microcontroller based on the XC800 core (8051-compatible), featuring 8 KB Flash, 256 B RAM, and integrated 10-bit 8-channel ADC. It operates at 5 V I/O supply with internal 2.5 V core regulation, supports LIN protocol, UART, SSC, and CCU6 PWM generation, and targets automotive body electronics control units.

For engineers reviewing the SAA-XC866L-2FRA 5V BE datasheet, SAA-XC866L-2FRA 5V BE pinout, SAA-XC866L-2FRA 5V BE application, or SAA-XC866L-2FRA 5V BE equivalent, key selection criteria include LIN-compliant timing accuracy, 5 V tolerant I/O for legacy automotive interfaces, embedded voltage regulation, and PG-TSSOP-38 package suitability for space-constrained PCB layouts.

Technical Context

The SAA-XC866L-2FRA 5V BE implements a two-clock-per-machine-cycle 8051-compatible core with dual data pointers and on-chip memory protection. Its clock system integrates an on-chip oscillator and PLL with loss-of-lock detection, enabling stable operation across temperature ranges up to 140 °C.

It features three 16-bit timers (T0/T1/T2), a dedicated Capture/Compare Unit 6 (CCU6) for motor control PWM, and a full-duplex UART with LIN header transmission support. The 10-bit ADC includes programmable sampling timing and channel sequencing without CPU intervention.

Key Specifications

Pinout & Package

Package: PG-TSSOP-38 (38-pin thin shrink small outline package, lead pitch 0.5 mm, body width 4.4 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SAK-TC1766 and SPC560B50L5, the SAA-XC866L-2FRA 5V BE delivers optimal cost-performance balance for LIN slave nodes where deterministic header timing, 5 V I/O integration, and thermal robustness outweigh raw compute throughput or multi-protocol flexibility.

Availability

SAA-XC866L-2FRA 5V BE is available at Aetrix Electronics and suitable for automotive door modules, engine bay fan controllers, and body control units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SAA-XC866L-2FRA 5V BE 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, and security solutions, with global R&D and manufacturing infrastructure.

The SAA-XC866 belongs to the XC800 family-designed specifically for cost-sensitive, thermally demanding automotive body electronics applications requiring high reliability, LIN compliance, and minimal external component count.

FAQ

Does SAA-XC866L-2FRA 5V BE support LIN 2.1 or later versions?

Yes, it supports LIN 2.1 slave functionality through dedicated hardware for sync, identifier, and data field transmission. The CCU6 and UART peripherals are configured to meet LIN physical layer timing requirements, including ±1.5% baud rate tolerance and guaranteed header timing. No software stack is needed for basic LIN slave operation.

What is the maximum ADC sampling rate achievable with this MCU?

The ADC achieves up to 100 kS/s conversion rate under optimal conditions: 10-bit resolution, internal ADC clock derived from system clock divided by 4, and single-channel sequential mode. Conversion time is 11.5 µs per sample, limited by internal capacitor settling and reference stabilization-not by CPU speed.

Can the internal voltage regulator supply external circuitry?

No-the internal 2.5 V regulator powers only the core logic (CPU, RAM, SFRs) and is not designed to drive external loads. VDDIO (5 V) must be supplied externally to power I/O buffers, ADC reference, and peripheral drivers. Attempting to draw current from VDDCORE will cause regulation failure and system instability.

Is JTAG debugging supported in all power-saving modes?

JTAG remains functional in idle and slow-down modes but is disabled in power-down mode due to clock gating of the debug interface. Wake-up events (RXD, EXINT0) restore full JTAG access after exit from power-down, enabling post-wake debugging without reset.