Z8FS040BSB20EG

Overview

The Z8FS040BSB20EG is an 8-bit microcontroller from the ZMOTION Detection and Control Family, based on the eZ8 architecture. It integrates 4 KB of in-circuit programmable Flash memory for user application code and 256 bytes of available RAM. The device features a Sigma-Delta ADC with up to three single-ended channels and includes built-in PIR motion detection algorithms accessible via a software API. Operating within a voltage range of 2.7 V to 3.6 V, it supports external oscillators up to 20 MHz and internal precision oscillation at 5.53 MHz.

Feature Summary

• Integrated ZMOTION PIR technology with background motion detection algorithms
• eZ8 CPU core with 4 KB user-accessible Flash and 256 bytes of RAM
• Sigma-Delta ADC supporting up to 3 single-ended or 1 differential channel
• Full-duplex UART, two 16-bit timers, and watchdog timer

Applications

• Lighting control systems
• HVAC occupancy sensing
• Access control devices
• Vending machines and display proximity sensors

Procurement Notes

Verify component authenticity through authorized distributors. Confirm that the specific revision identifier 'B' matches the required PIR engine version for the target application. Ensure firmware compatibility with the generic detection source code (RD0026-SC01) as the unit is not preprogrammed.

Selection Notes

Select this part for applications requiring dedicated passive infrared motion detection without external processing. The 8-pin SOIC package limits GPIO availability compared to larger packages. Verify that the three available ADC channels are sufficient for the sensor configuration, noting that ANA2 is reserved for the primary PIR input.

Part Context

This component belongs to the Z8FS040 series, which utilizes the base Z8F082A MCU silicon. The 'SB' suffix indicates the 8-pin SOIC package variant. The 'B' designation corresponds to PIR Technology Revision 2.00, which provides improved detection stability, extended detection modes, and advanced API features compared to the initial release.

Replacement Considerations

Direct pin-compatible replacements within the same family include other Z8FS040 variants with different package sizes, such as the Z8FS040xHH20EG (20-pin) or Z8FS040xHJ20EG (28-pin), provided the additional I/O capacity is utilized. Base silicon equivalents like the Z8F082ASB020EG lack the integrated PIR engine.