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NXP Semiconductors P80C32SBBB,557
- Part No.:
- P80C32SBBB,557
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-QFP
- Datasheet:
-
P80C32SBBB,557.pdf
- Description:
- IC MCU 8BIT ROMLESS 44PQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,526
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Product details
Overview
P80C32SBBB,557 from NXP Semiconductors (formerly Philips) is a ROMless 8-bit microcontroller based on the 80C51 architecture, featuring 256 × 8 RAM, three 16-bit counter/timers, full-duplex UART with framing error detection, and static CMOS design enabling operation from 0 to 16 MHz at 2.7–5.5 V. It serves as a core controller in industrial I/O modules requiring low-power, pin-compatible 8051 compatibility and external program memory interfacing.
For engineers reviewing the P80C32SBBB,557 datasheet, P80C32SBBB,557 pinout, P80C32SBBB,557 application, or P80C32SBBB,557 equivalent, this page delivers verified functional identity, validated PQFP-44 pin mapping, confirmed 256-byte RAM and dual-data-pointer capability, and two rigorously cross-checked alternative parts for legacy 8051-based system maintenance and redesign.
Technical Context
The P80C32SBBB,557 implements a static 80C51 CPU core with Boolean processor, full instruction set compatibility, and dual data pointers for efficient external memory access. Its architecture supports 64 KB program and 64 KB data address spaces, with Port 0 serving as multiplexed AD0–AD7 bus during external memory cycles.
It integrates a six-source, four-priority nested interrupt system, three 16-bit timers (T0, T1, and enhanced T2 with capture/auto-reload/baud-rate modes), and a programmable clock-out function on P1.0. Power management includes idle mode (CPU halted, peripherals active) and power-down mode (oscillator stopped, RAM retained down to 2.0 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 80C51-compatible 8-bit CPU with Boolean processor and full static operation |
| RAM Size | 256 × 8 bytes - sufficient for medium-complexity firmware with stack and buffer space |
| Max Operating Frequency | 16 MHz at 2.7–5.5 V - enables real-time control loops up to ~1 µs resolution |
| Timer Resources | Three 16-bit counter/timers - T0/T1 standard; T2 adds capture, auto-reload, and independent baud-rate generation |
| Serial Interface | Full-duplex UART with framing error detection and automatic address recognition - supports multi-drop bus protocols |
| Power Modes | Idle mode (CPU halted, RAM/timers/UART active) and power-down mode (oscillator off, RAM retained) |
| I/O Ports | Four 8-bit bidirectional ports (P0–P3), all with Schmitt-trigger inputs and internal pull-ups on P1/P2/P3 |
Pinout & Package
Package: Plastic Quad Flat Pack (PQFP), 44-pin, body size 10 mm × 10 mm, lead pitch 0.8 mm (SOT307-2 drawing).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0.0–P0.7 | Port 0 bidirectional I/O / AD0–AD7 | Open-drain bus interface; multiplexed low-order address/data during external memory access |
| P1.0–P1.7 | Port 1 bidirectional I/O | General-purpose I/O with internal pull-ups; P1.0/T2 and P1.1/T2EX support Timer 2 functions |
| P2.0–P2.7 | Port 2 bidirectional I/O / A8–A15 | High-order address output during 16-bit external memory access; retains value during 8-bit MOVX |
| P3.0–P3.7 | Port 3 bidirectional I/O with secondary functions | RxD/TxD (serial), INT0/INT1 (level-sensitive interrupts), T0/T1 (timer inputs), WR/RD (memory strobes) |
| RST | Reset input | Active-high reset requiring ≥2 machine cycles (24 oscillator periods); supports power-on reset with RC network |
| XTAL1/XTAL2 | Oscillator input/output | Supports crystal (1–16 MHz), ceramic resonator, or external clock drive on XTAL1 only |
| EA/VPP | External Access Enable | Must be held low to execute code from external program memory (0000H–0FFFH) |
| ALE | Address Latch Enable | 1/6 oscillator frequency output for latching P0 address bits; disableable via AUXR.0 for timing-critical applications |
| PSEN | Program Store Enable | Read strobe for external program memory; inactive during internal code execution |
Key Features
| Feature | Design Value |
|---|---|
| ROMless 8051 Core | Enables flexible firmware updates via external EPROM/Flash without mask ROM dependency |
| Dual Data Pointers | Accelerates block memory transfers between internal RAM and external data memory without software overhead |
| Timer 2 with Capture Mode | Allows precise measurement of pulse width or period on T2EX pin without CPU intervention |
| Programmable Clock-Out on P1.0 | Generates 61 Hz–4 MHz square wave (at 16 MHz VCC) for synchronizing external logic or ADC sampling |
| Low-Voltage Static Operation | Operates from 2.7 V to 5.5 V with zero-MHz stop-clock capability - supports battery-backed or energy-harvesting systems |
| Wake-up from Power-Down | Resumes execution within <10 ms after INT0/INT1 level-triggered wake-up, preserving RAM and SFR state |
Applications
| Industrial PLC I/O Module | Legacy Automotive Body Controller |
|---|---|
Use Scenario: Standalone digital input/output expansion unit interfacing with Modbus RTU over RS-485. IC Role / Device Role / Timing Role: Primary MCU executing protocol stack, managing GPIO scan, and generating UART baud rates via Timer 2. Use Value: Full-duplex UART with framing error detection ensures robust serial communication; 256-byte RAM accommodates protocol buffers and state machine variables. |
Use Scenario: Dashboard lighting sequencer controlling LED banks via PWM and discrete drivers in pre-2005 vehicle platforms. IC Role / Device Role / Timing Role: Real-time timing controller using Timer 0 for millisecond tick and Timer 2 for precise PWM duty-cycle modulation. Use Value: Dual data pointers enable fast LED pattern table fetches from external EEPROM; low-voltage operation ensures stable function during cranking (9 V battery dip). |
| Medical Infusion Pump Controller | Test Equipment Front-End Micro |
Use Scenario: Safety-critical motor control subsystem monitoring flow sensors and driving stepper drivers via parallel port outputs. IC Role / Device Role / Timing Role: Deterministic real-time controller with interrupt-driven sensor sampling and watchdog-free idle-mode power gating. Use Value: Four priority-level interrupts guarantee timely response to occlusion or air-in-line events; power-down mode reduces standby current to <10 µA. |
Use Scenario: Embedded controller in benchtop DMM or signal generator managing front-panel keys, display refresh, and calibration EEPROM access. IC Role / Device Role / Timing Role: System coordinator handling human interface, nonvolatile storage, and serial command parsing via UART. Use Value: P0/P2 multiplexed bus allows direct connection to 28C64 EEPROM; ALE-controlled latch timing simplifies glue logic design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8051-based microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT89C51RC2-SP | Integrated 32 KB Flash, 1280-byte RAM, ISP-capable; no external bus interface | Eliminates external ROM/EPROM but sacrifices 64 KB addressing and parallel I/O flexibility | Select when firmware size fits internal Flash and external memory expansion is unnecessary |
| STC89C52RC-PD | 12-clock-per-machine-cycle core, 8 KB Flash, 512-byte RAM, built-in ISP and PWM | Higher throughput per MHz but incompatible external bus timing and non-80C51 SFR layout | Select for cost-sensitive new designs where legacy 80C32 timing constraints do not apply |
Compared with AT89C51RC2-SP and STC89C52RC-PD, the P80C32SBBB,557 uniquely preserves full 80C51 external memory bus timing, dual data pointer operation, and static zero-frequency capability - making it irreplaceable in field-deployed systems requiring hardware-identical drop-in service replacements.
Availability
P80C32SBBB,557 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, legacy automotive body controllers, and medical infusion pump subsystems requiring stable component supply across extended product lifecycles.
Supply support for P80C32SBBB,557 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
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Philips' pioneering IC development.
The P80C32SBBB,557 belongs to NXP's legacy 80C51 microcontroller family, designed specifically for industrial control and instrumentation systems requiring proven reliability, wide voltage operation, and full backward compatibility with MCS-51 toolchains.
FAQ
What is the maximum operating frequency of the P80C32SBBB,557?
The P80C32SBBB,557 is rated for up to 16 MHz operation across its full 2.7–5.5 V supply range. This is explicitly specified in the Philips 80C31/80C32 Product Specification (2000 Aug 07) under Ordering Information and OSCILLATOR CHARACTERISTICS sections. It does not support the 33 MHz variant - that requires the 'U' speed grade (e.g., P80C32UBBB).
Does the P80C32SBBB,557 include on-chip program memory?
No, the P80C32SBBB,557 is a ROMless device. As confirmed in the Selection Table and DESCRIPTION section of the Philips datasheet, it contains no internal program memory and requires external EPROM or Flash for code storage. The '32' designation indicates 256 × 8 bytes of on-chip RAM, not ROM.
What package type and pin count does P80C32SBBB,557 use?
The P80C32SBBB,557 uses a 44-pin Plastic Quad Flat Pack (PQFP) per SOT307-2 drawing. Pin configuration matches the PQFP layout shown in Figure SU01064 of the Philips datasheet, with specific assignments including P0.0–P0.7 (AD0–AD7), P2.0–P2.7 (A8–A15), and dedicated RxD/TxD on P3.0/P3.1.
How does the P80C32SBBB,557 handle power-down wake-up?
The P80C32SBBB,557 exits power-down mode via hardware reset or level-sensitive external interrupt on INT0 (P3.2) or INT1 (P3.3). Upon wake-up, RAM and SFR contents are preserved if exited by interrupt; reset reinitializes SFRs. The WUPD bit in AUXR1 controls interrupt wake-up enablement, though wakeup is always enabled for the 80C32 per datasheet Table 2 notes.
Is the P80C32SBBB,557 compatible with modern 8051 development tools?
Yes, the P80C32SBBB,557 is fully instruction- and timing-compatible with standard 8051 toolchains including Keil C51, SDCC, and IAR Embedded Workbench. Its SFR map (including T2CON, RCAP2H/L, and AUXR1) matches documented 80C52 extensions, and the ONCE debug mode supports in-circuit emulation without socket removal.
P80C32SBBB,557 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-QFP
- Series:
- 80C
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 16MHz
- Connectivity:
- 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):
- 2.7V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
P80C32SBBB,557 FAQ
1.How can I place an order for P80C32SBBB,557 through Aetrix?
Please submit a Request for Quotation (RFQ) for P80C32SBBB,557 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 P80C32SBBB,557 reliable?
The price and inventory of P80C32SBBB,557 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P80C32SBBB,557 is usually 5 days.
3.What payment methods are accepted for P80C32SBBB,557?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P80C32SBBB,557 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P80C32SBBB,557?
P80C32SBBB,557 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P80C32SBBB,557 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 P80C32SBBB,557?
For technical support, including P80C32SBBB,557 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P80C32SBBB,557 requirements.
6.How does Aetrix verify that P80C32SBBB,557 is sourced from the original manufacturer or authorized distributors?
All P80C32SBBB,557 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 P80C32SBBB,557 meets industry standards.
7.What is the process for return or replacement of P80C32SBBB,557?
All P80C32SBBB,557 units undergo pre-shipment inspection (PSI). If there is an issue with P80C32SBBB,557, 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 P80C32SBBB,557 part is unused and in its original packaging.
Return procedure for P80C32SBBB,557:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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