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Infineon Technologies SABC501G1E24N
- Part No.:
- SABC501G1E24N
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
SABC501G1E24N.pdf
- Description:
- LEGACY 8-BIT MCU
- Quantity:
- Payment:
- Shipping:
Inventory:645
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Product details
Overview
SABC501G1E24N from Siemens AG is an 8-bit CMOS microcontroller fully compatible with the standard 8051 architecture, featuring 8K × 8 one-time programmable (OTP) program memory, 256 × 8 RAM, three 16-bit timers (including Timer 2 with up/down counting), USART, and six interrupt sources with two priority levels. It operates at 24 MHz, supports quasi-bidirectional I/O ports, and targets embedded control in industrial instrumentation and legacy automation systems.
For engineers reviewing the SABC501G1E24N datasheet, SABC501G1E24N pinout, SABC501G1E24N application, or SABC501G1E24N equivalent, key selection considerations include OTP memory security (2-level lock), external clock drive capability, DC/AC timing compliance at 24 MHz, and P-LCC-44 package thermal performance in 0 °C to 70 °C ambient.
Technical Context
The SABC501G1E24N implements a Harvard architecture with separate program and data address spaces, using an 8-bit ALU and register-based CPU core derived from the Intel 8051 instruction set. Its memory map includes 64 KB program space (external or on-chip OTP), 256-byte internal RAM, and bit-addressable special function registers (SFRs) for peripheral control.
Timer 2 operates as a 16-bit up/down counter with capture/reload functionality triggered by T2EX (P1.1), while the USART supports full-duplex asynchronous communication with programmable baud rates. Power-saving modes include idle and power-down, controlled via the PCON register.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit 8051-compatible CPU with Harvard memory organization and 12-clock-per-machine-cycle execution. |
| Program Memory | 8K × 8 OTP memory - one-time programmable, supports 2-level lock for firmware protection against readout. |
| Max Clock Frequency | 24 MHz - enables 2 µs minimum instruction cycle time for real-time control loop timing. |
| Data RAM | 256 × 8 bytes internal RAM - includes 128 bytes bit-addressable for efficient flag and status handling. |
| Timers/Counters | Three 16-bit timers - Timer 2 supports up/down counting and event capture via T2EX (P1.1) input. |
| Serial Interface | Full-duplex USART - supports mode 0–3 with variable baud rate generated from Timer 1 or Timer 2. |
| I/O Ports | Four 8-bit quasi-bidirectional ports - Port 1 provides secondary functions including T2/T2EX on P1.0/P1.1. |
Pinout & Package
P-LCC-44 (Plastic Leaded Chip Carrier) package with 44 leads, gull-wing surface-mount configuration, JEDEC MS-026 compliant, rated for 0 °C to 70 °C ambient operation (SAB prefix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0 / T2 | Port 1 bit 0 / Timer 2 input | Primary I/O pin; when configured for timer function, accepts external count pulses for Timer 2. |
| P1.1 / T2EX | Port 1 bit 1 / Timer 2 external trigger | Secondary function enables capture/reload or up/down direction control of Timer 2 on signal edge. |
| XTAL1 / XTAL2 | Crystal oscillator inputs | Drive internal high-gain inverter; support quartz crystal or external clock source at 24 MHz. |
| EA/VPP | External Access / Programming voltage | Low = execute from external memory; high = execute from on-chip OTP; VPP = 12.75 V during OTP programming. |
| ALE/PROG | Address Latch Enable / Programming pulse | Demultiplexes P0 address/data bus; provides programming pulse during OTP write cycles. |
| PSEN | Program Store Enable | Active-low output enabling external ROM access during opcode fetch cycles. |
Key Features
| Feature | Design Value |
|---|---|
| OTP Memory Security | 2-level lock prevents unauthorized readout or reprogramming - critical for firmware IP protection in field-deployed devices. |
| Timer 2 Flexibility | Up/down counting with external trigger (T2EX) enables precise pulse-width measurement or motor phase control without CPU overhead. |
| Quasi-Bidirectional I/O | Internal pull-ups eliminate need for external resistors on input reads - reduces BOM cost and PCB area in sensor interface designs. |
| Quick Pulse Programming | OTP programming completed in ≤100 ms per byte - accelerates prototyping and small-batch firmware updates. |
| Power Management | Idle and power-down modes reduce current to 2.5 mA and 50 µA respectively - extends battery life in portable instrumentation. |
Applications
| Industrial PLC I/O Module | Legacy HVAC Controller |
|---|---|
|
Use Scenario: Standalone digital input/output expansion module interfacing with 24 V DC sensors and actuators in factory-floor environments. IC Role / Device Role / Timing Role: Primary controller executing ladder logic scan cycles, managing serial Modbus RTU communication, and servicing real-time I/O interrupts. Use Value: 24 MHz clock and three hardware timers enable deterministic 10 ms scan intervals with jitter under ±2 µs, meeting IEC 61131-3 timing requirements. |
Use Scenario: Retrofit controller for analog temperature and humidity regulation in commercial building air-handling units. IC Role / Device Role / Timing Role: System-on-chip managing ADC sampling, PID computation, relay drive timing, and RS-485 network polling. Use Value: Integrated 256-byte RAM and bit-addressable SFRs allow compact PID coefficient storage and fast flag manipulation, reducing external memory dependency. |
| Medical Diagnostic Equipment Front-End | Automotive Body Control Unit (Legacy) |
|
Use Scenario: Signal conditioning and safety-monitoring subsystem in ultrasound imaging front-end, requiring fail-safe reset behavior. IC Role / Device Role / Timing Role: Dedicated monitor MCU supervising main processor health, validating sensor integrity, and asserting hardware reset on fault detection. Use Value: Dual-priority interrupt structure ensures immediate response to watchdog timeout or overtemperature signals, meeting IEC 62304 Class B requirements. |
Use Scenario: Door lock actuator control in pre-2005 vehicle platforms where CAN was not yet standardized. IC Role / Device Role / Timing Role: Embedded controller driving LDMOS FETs, decoding LIN-like UART commands, and managing anti-tamper debounce timing. Use Value: Quasi-bidirectional ports directly interface with mechanical switch matrices without external pull-ups, simplifying harness design and improving ESD robustness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT89C51-24PI | Same 8051 core, 4K Flash (not OTP), 24 MHz max, PDIP-40 only - lacks Timer 2 up/down capability and 2-level lock. | Lower-security firmware updates required; unsuitable for tamper-resistant deployments. | Select when field reprogrammability outweighs firmware protection needs. |
| STC89C52RC-40I-PDIP | Enhanced 8051, 8K Flash, 40 MHz, built-in ISP - no OTP, no P-LCC-44 option, different reset timing and SFR layout. | Requires PCB redesign for PDIP-40; incompatible with legacy C501 toolchains and debug adapters. | Select only for new designs targeting modern development workflows and higher clock margins. |
Compared with AT89C51-24PI and STC89C52RC-40I-PDIP, the SABC501G1E24N offers unique OTP-based firmware security and Timer 2 up/down functionality in P-LCC-44, making it irreplaceable for maintaining legacy industrial control hardware with strict IP and form-factor constraints.
Availability
SABC501G1E24N is available at Aetrix Electronics and suitable for industrial PLC I/O modules, legacy HVAC controllers, medical diagnostic equipment front-ends, and automotive body control units requiring stable component supply across extended product lifecycles.
Supply support for SABC501G1E24N 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
Siemens AG Semiconductor Group (now Infineon Technologies) was a leading European semiconductor manufacturer, known for industrial-grade microcontrollers, power devices, and automotive ICs before its semiconductor division spun off in 1999.
The C501 family was designed specifically for cost-sensitive, high-reliability embedded control in industrial automation and instrumentation, emphasizing OTP security, wide temperature tolerance, and pin compatibility with legacy 8051 toolchains.
FAQ
What programming voltage is required for OTP programming of SABC501G1E24N?
The SABC501G1E24N requires VPP = 12.75 V applied to the EA/VPP pin during OTP programming cycles. This voltage must be stable and current-limited to 10 mA maximum. Programming is performed using the Quick Pulse algorithm with ALE/PROG serving as the programming pulse input; all timing parameters are defined in Section 5.2 of the 1997 datasheet.
Does SABC501G1E24N support in-system programming (ISP)?
No, the SABC501G1E24N does not support in-system programming. It uses one-time programmable (OTP) memory that can only be programmed in a dedicated programmer prior to soldering. Once programmed, the memory contents are permanent and protected by a 2-level lock mechanism that disables further read or write access.
What is the function of the ALE/PROG pin during normal operation versus programming?
During normal operation, ALE/PROG serves as Address Latch Enable to demultiplex the P0 address/data bus. During OTP programming, it receives the programming pulse signal that initiates byte-write cycles. The pin's dual role is selected automatically based on EA/VPP voltage level and internal state machine sequencing, as detailed in Figure 12 of the datasheet.
Can Timer 2 operate as a true up/down counter without CPU intervention?
Yes - Timer 2 can autonomously toggle counting direction on each falling edge of the T2EX (P1.1) signal when configured in up/down mode. The hardware handles direction switching, overflow/underflow flag setting (TF2/EXF2), and reload/capture without software polling or interrupt latency, enabling precise PWM edge alignment in motor control.
SABC501G1E24N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 44-LCC (J-Lead)
- Series:
- C501
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 24MHz
- Connectivity:
- UART/USART
- Peripherals:
- POR
- Number of I/O:
- 32
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- OTP
- EEPROM Size:
- -
- RAM Size:
- 256 x 8
- Voltage - Supply (Vcc/Vdd):
- 4.25V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- External, Internal
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
SABC501G1E24N FAQ
1.How can I place an order for SABC501G1E24N through Aetrix?
Please submit a Request for Quotation (RFQ) for SABC501G1E24N on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SABC501G1E24N reliable?
The price and inventory of SABC501G1E24N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SABC501G1E24N is usually 5 days.
3.What payment methods are accepted for SABC501G1E24N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SABC501G1E24N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SABC501G1E24N?
SABC501G1E24N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SABC501G1E24N order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SABC501G1E24N?
For technical support, including SABC501G1E24N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SABC501G1E24N requirements.
6.How does Aetrix verify that SABC501G1E24N is sourced from the original manufacturer or authorized distributors?
All SABC501G1E24N products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SABC501G1E24N meets industry standards.
7.What is the process for return or replacement of SABC501G1E24N?
All SABC501G1E24N units undergo pre-shipment inspection (PSI). If there is an issue with SABC501G1E24N, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SABC501G1E24N part is unused and in its original packaging.
Return procedure for SABC501G1E24N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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