Infineon Technologies SAB-C501G-1EM

Overview

SAB-C501G-1EM from Infineon Technologies is an 8-bit CMOS microcontroller with on-chip ROM, 128 bytes RAM, four 8-bit I/O ports, two 16-bit timers/counters, and a UART interface. It operates at up to 12 MHz clock frequency and supports single-cycle instruction execution for core logic control in legacy industrial controllers.

For engineers reviewing the SAB-C501G-1EM datasheet, SAB-C501G-1EM pinout, SAB-C501G-1EM application, or SAB-C501G-1EM equivalent, key selection criteria include ROM size, timer resolution, UART compatibility, and 40-pin DIP package constraints in retrofit embedded designs.

Technical Context

This microcontroller implements an MCS-51-compatible CPU core with Harvard architecture, supporting 111 instructions including bit manipulation and Boolean logic operations. It integrates a programmable baud rate generator tied to Timer 1 and features power-down and idle low-power modes.

The device uses internal ROM for program storage and supports external memory expansion via Port 0 (AD0–AD7) and Port 2 (A8–A15). Reset is active-high and requires a minimum 2-cycle pulse width synchronized to the oscillator clock.

Key Specifications

Pinout & Package

Package: 40-pin plastic Dual In-line Package (DIP) with 0.6-inch width, through-hole mounting, and standard 0.1-inch pin pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT89C51-24PI and STC89C52RC, the SAB-C501G-1EM offers guaranteed firmware immutability and proven thermal stability in legacy industrial enclosures, at the cost of field-upgradability and memory scalability.

Availability

SAB-C501G-1EM is available at Aetrix Electronics and suitable for industrial PLC modules, legacy HVAC controllers, and automated test fixtures requiring stable component supply across extended product lifecycles.

Supply support for SAB-C501G-1EM 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 is a German semiconductor manufacturer specializing in power management, automotive ICs, and industrial microcontrollers with global manufacturing and quality certification.

The SAB-C501G series belongs to Infineon's legacy 8-bit microcontroller product line, designed specifically for cost-sensitive, high-reliability industrial control applications where long-term availability and ROM-based security are essential.

FAQ

What is the maximum operating temperature range for SAB-C501G-1EM?

The SAB-C501G-1EM is rated for industrial temperature operation from −40 °C to +85 °C. This range is validated per Infineon's qualification standards for extended thermal cycling and sustained bias stress, making it suitable for unventilated control cabinets and outdoor-mounted equipment enclosures.

Does SAB-C501G-1EM support external program memory expansion?

Yes - when the EA pin is held low, the device executes code from external ROM or EPROM connected to Port 0 (AD0–AD7) and Port 2 (A8–A15). Address latching via ALE and control signals (RD, WR, PSEN) are fully supported per MCS-51 specification.

Can SAB-C501G-1EM be used with a ceramic resonator instead of a crystal?

Yes - the internal oscillator circuit accepts ceramic resonators rated for 12 MHz fundamental mode. Startup time increases slightly versus quartz crystals, but timing accuracy remains within ±1% over temperature, sufficient for non-critical UART or timer applications.

Is there a modern drop-in replacement for SAB-C501G-1EM with identical pinout and ROM behavior?

No - while AT89C51-24PI shares the same 40-pin DIP footprint and instruction set, its flash memory introduces erase/write cycles and voltage-dependent programming, breaking the immutable ROM behavior required in safety-critical or tamper-evident applications.