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NXP Semiconductors P80C652EBA/04,512
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- Part No.:
- P80C652EBA/04,512
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
P80C652EBA/04,512.pdf
- Description:
- IC MCU 8BIT ROMLESS 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,622
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Product details
Overview
P80C652EBA/04,512 from Philips Semiconductors is a ROMless 8-bit CMOS microcontroller derivative of the 80C51 family, featuring 256 × 8 RAM, four 8-bit I/O ports, two 16-bit timers, full-duplex UART, and I²C serial interface (SCL/SDA on P1.6/P1.7). It operates at up to 16 MHz with 0 to +70°C temperature range and targets embedded control in industrial instrumentation and legacy automation systems.
For engineers reviewing the P80C652EBA/04,512 datasheet, P80C652EBA/04,512 pinout, P80C652EBA/04,512 application, or P80C652EBA/04,512 equivalent, key selection criteria include its PLCC-44 package, I²C master/slave capability, dual power modes (idle/power-down), 80C51 instruction set compatibility, and external memory expansion support via multiplexed Port 0 and Port 2.
Technical Context
The P80C652EBA/04,512 implements an enhanced 80C51 core with architectural additions including dedicated I²C serial port SIO1 (mapped to P1.6/SCL and P1.7/SDA) and extended power management registers in PCON. Its oscillator supports crystal (XTAL1/XTAL2) or external clock input, with reset triggered by a 24-cycle high pulse on RST.
It retains standard 80C51 peripheral architecture-two 16-bit timer/event counters (T0/T1), nested two-priority interrupt system (INT0/INT1), and UART-but adds I²C protocol handling in hardware, enabling direct slave addressing and clock synchronization without software bit-banging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 80C51-compatible 8-bit CPU with identical instruction set (49 one-byte, 45 two-byte, 17 three-byte instructions) |
| Memory | ROMless (0 kB internal program memory); 256 × 8 bytes on-chip RAM; expandable to 64 kB external program/data memory |
| Operating Frequency | 3.5–16 MHz crystal or external clock; 58% of instructions execute in 0.75 µs at 16 MHz |
| I/O & Interfaces | Four 8-bit bidirectional ports (P0–P3); I²C bus (SCL/SDA on P1.6/P1.7); full-duplex UART (RxD/TxD on P3.0/P3.1) |
| Power Modes | Idle mode (CPU halted, peripherals active, 6 mA @ 16 MHz); Power-down mode (oscillator stopped, RAM retained, 50 µA) |
| Supply & Temp | 4.5–5.5 V operation; rated for 0 to +70°C ambient temperature range |
Pinout & Package
Package: Plastic Leaded Chip Carrier (PLCC), 44-pin, SOT187-2 footprint. All VSS pins must be connected to ground per QFP notes - though this part uses PLCC, grounding all VSS terminals ensures EMC compliance and stable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.6 / SCL | I²C Clock Line | Open-drain output; requires external pull-up; drives I²C bus clock synchronously with internal timing generator |
| P1.7 / SDA | I²C Data Line | Open-drain bidirectional I/O; supports master/slave data transfer; complies with I²C voltage thresholds (VIL2 ≤ 0.3VDD, VIH2 ≥ 0.7VDD) |
| P3.0 / RxD | UART Serial Input | Asynchronous receive input; TTL-level compatible; supports programmable baud rates via Timer 1 reload |
| P3.1 / TxD | UART Serial Output | Asynchronous transmit output; driven by UART shift register; supports full-duplex communication |
| RST | Reset Input | Active-high asynchronous reset; requires ≥24 oscillator cycles high; internal pull-down resistor (50–150 kΩ) enables power-on reset with capacitor to VDD |
| XTAL1 | Oscillator Input | Inverting amplifier input; accepts crystal or external clock source; minimum high/low time constraints apply for external drive |
| XTAL2 | Oscillator Output | Inverting amplifier output; left unconnected when using external clock on XTAL1 |
| EA | External Access Enable | Input latched at reset; HIGH selects internal ROM (not applicable here, as P80C652 is ROMless); LOW forces execution from external memory |
Key Features
| Feature | Design Value |
|---|---|
| I²C Serial Interface | Hardware-implemented master/slave I²C port (SIO1) with dedicated SFRs (S1CON, S1STA, S1ADR) enabling byte-oriented transfers without CPU overhead |
| 80C51 Instruction Set Compatibility | Full binary and BCD arithmetic support plus bit manipulation; over 100 instructions ensure drop-in firmware reuse from existing 80C51 designs |
| External Memory Expansion | Port 0 (AD0–AD7) and Port 2 (A8–A15) provide multiplexed address/data bus; ALE and PSEN enable external 64 kB program/data memory interfacing |
| Dual Low-Power Modes | Idle mode preserves all register and RAM state while halting CPU; Power-down mode stops oscillator and reduces current to 50 µA - critical for battery-backed applications |
| Interrupt Architecture | Two-priority-level, multi-source nested interrupt system with INT0/INT1 inputs and timer/serial interrupt vectors for deterministic real-time response |
Applications
| Industrial Sensor Node | Legacy PLC I/O Module |
|---|---|
|
Use Scenario: Standalone temperature/humidity sensor node with local I²C-connected sensors and RS-232 telemetry. IC Role / Device Role / Timing Role: Primary controller executing sensor polling, I²C transaction scheduling, and UART framing logic. Use Value: On-chip I²C eliminates bit-banged GPIO drivers; UART and timer resources enable precise 9600-baud transmission; idle mode extends battery life between readings. |
Use Scenario: Retrofit digital I/O expansion module for aging programmable logic controllers using parallel bus interfaces. IC Role / Device Role / Timing Role: Bus interface controller translating PLC scan cycles into Port 0/2 address/data strobes and RD/WR handshaking. Use Value: Direct 80C51 compatibility allows reuse of legacy ladder logic firmware; external memory expansion supports configurable I/O mapping tables in EPROM. |
| Embedded Power Meter Front-End | Automotive Body Control Subsystem |
|
Use Scenario: AC mains monitoring unit with analog front-end ADC, energy calculation engine, and LCD display driver. IC Role / Device Role / Timing Role: Real-time accumulator managing kWh integration, UART diagnostics, and 50/60 Hz zero-crossing detection via INT0. Use Value: Two 16-bit timers support precise line-frequency timing; 256-byte RAM accommodates rolling energy buffers; UART enables field calibration via PC tool. |
Use Scenario: Door lock actuator controller interfacing with CAN gateway via discrete level-shifting and local switch/sensor inputs. IC Role / Device Role / Timing Role: Local intelligence hub managing debounce, motor sequencing, and fault reporting over UART to main ECU. Use Value: Four 8-bit ports directly drive relays and read switches; power-down mode minimizes quiescent current during vehicle sleep; robust 0–70°C rating suits cabin environments. |
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 | 4 kB Flash ROM, no I²C; 24 MHz max; same 40-pin DIP footprint but different pinout (no SCL/SDA) | Lacks hardware I²C; requires software emulation for sensor buses; suitable only where external EEPROM or SPI peripherals dominate | Select when Flash reprogrammability is required and I²C is absent from system architecture |
| STC89C52RC | 8 kB Flash, enhanced UART (16-bit baud rate generator), no native I²C; operates at 5.5 V, wider temp range (–40 to +85°C) | Requires bit-banged I²C or external bridge IC; superior power efficiency in idle mode (2 mA @ 12 MHz) but no power-down mode | Prefer for cost-sensitive consumer products needing field firmware updates and higher ambient tolerance |
Compared with AT89C51-24PI and STC89C52RC, the P80C652EBA/04,512 delivers unique hardware I²C support in a ROMless configuration ideal for custom bootloaders and external Flash-based firmware, while maintaining strict 80C51 code compatibility - a critical advantage for legacy migration paths where peripheral register mapping must remain unchanged.
Availability
P80C652EBA/04,512 is available at Aetrix Electronics and suitable for industrial sensor nodes, legacy PLC I/O modules, embedded power meter front-ends, and automotive body control subsystems requiring stable component supply and long-term obsolescence management.
Supply support for P80C652EBA/04,512 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
Philips Semiconductors (now NXP Semiconductors) is a Dutch-origin semiconductor company known for pioneering mixed-signal ICs and embedded controllers in the 1980s–1990s.
The P80C652EBA/04,512 belongs to Philips' 8XC652 microcontroller product line, designed specifically to extend the 80C51 architecture with integrated I²C for industrial and instrumentation applications requiring low-cost, reliable serial sensor interfacing.
FAQ
What is the maximum operating frequency supported by the P80C652EBA/04,512?
The P80C652EBA/04,512 supports a maximum oscillator frequency of 16 MHz, as confirmed by the "DEVICE SPECIFICATIONS" table in the Philips datasheet. At this frequency, 58% of instructions execute in 0.75 µs. The part is not rated for 24 MHz operation - that specification applies only to variants marked with 'I' prefix (e.g., P80C652IBA).
Does the P80C652EBA/04,512 include on-chip program memory?
No, the P80C652EBA/04,512 is the ROMless version of the 8XC652 family. As stated in the "DESCRIPTION" section, it contains no internal program memory and relies entirely on external program memory accessed via EA = LOW, Port 0, Port 2, PSEN, and ALE signals.
How is the I²C interface implemented on the P80C652EBA/04,512?
The P80C652EBA/04,512 implements a full hardware I²C interface named SIO1, with dedicated SFRs (S1CON, S1STA, S1ADR) and fixed pin mapping: P1.6 functions as open-drain SCL and P1.7 as open-drain SDA. Unlike software-emulated I²C, this subsystem handles START/STOP, ACK/NACK, and clock stretching autonomously.
What power-saving modes does the P80C652EBA/04,512 support, and how are they controlled?
The P80C652EBA/04,512 supports Idle Mode and Power-Down Mode, both controlled via bits in the PCON special function register. Idle Mode halts the CPU while preserving all registers and RAM (6 mA @ 16 MHz); Power-Down Mode stops the oscillator and retains only RAM contents (50 µA). Both modes exit via hardware reset or enabled interrupts.
Is the P80C652EBA/04,512 pin-compatible with standard 80C51 microcontrollers?
No - while instruction-set and SFR layout are 80C51-compatible, the P80C652EBA/04,512 introduces new pin functions (SCL/SDA on P1.6/P1.7) and omits standard 80C51 pins like PSEN in certain configurations. Its PLCC-44 package differs physically from the 40-pin DIP used by most 80C51 variants, requiring PCB redesign for migration.
P80C652EBA/04,512 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-LCC (J-Lead)
- Series:
- 80C
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 16MHz
- Connectivity:
- EBI/EMI, I2C, UART/USART
- Peripherals:
- POR
- Number of I/O:
- 32
- Program Memory Size:
- -
- Program Memory Type:
- ROMless
- EEPROM Size:
- -
- RAM Size:
- 256 x 8
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
P80C652EBA/04,512 FAQ
1.How can I place an order for P80C652EBA/04,512 through Aetrix?
Please submit a Request for Quotation (RFQ) for P80C652EBA/04,512 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 P80C652EBA/04,512 reliable?
The price and inventory of P80C652EBA/04,512 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P80C652EBA/04,512 is usually 5 days.
3.What payment methods are accepted for P80C652EBA/04,512?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P80C652EBA/04,512 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P80C652EBA/04,512?
P80C652EBA/04,512 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P80C652EBA/04,512 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 P80C652EBA/04,512?
For technical support, including P80C652EBA/04,512 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P80C652EBA/04,512 requirements.
6.How does Aetrix verify that P80C652EBA/04,512 is sourced from the original manufacturer or authorized distributors?
All P80C652EBA/04,512 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 P80C652EBA/04,512 meets industry standards.
7.What is the process for return or replacement of P80C652EBA/04,512?
All P80C652EBA/04,512 units undergo pre-shipment inspection (PSI). If there is an issue with P80C652EBA/04,512, 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 P80C652EBA/04,512 part is unused and in its original packaging.
Return procedure for P80C652EBA/04,512:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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