My Inquiry
My Account
NXP Semiconductors P80C32SBPN,112
- Part No.:
- P80C32SBPN,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 40-DIP (0.600", 15.24mm)
- Datasheet:
-
P80C32SBPN,112.pdf
- Description:
- IC MCU 8BIT ROMLESS 40DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,283
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P80C32SBPN,112 from Philips Semiconductors is a ROMless 8-bit 80C51 microcontroller with 256 × 8 RAM, four 8-bit I/O ports, three 16-bit counter/timers, and full-duplex UART-operating at up to 33 MHz across 2.7 V–5.5 V supply for embedded control in industrial instrumentation and legacy automation systems.
For engineers reviewing the P80C32SBPN,112 datasheet, P80C32SBPN,112 pinout, P80C32SBPN,112 application, or P80C32SBPN,112 equivalent, key selection criteria include static operation down to 0 Hz, dual power-reduction modes (idle and power-down), programmable clock-out on P1.0, and compatibility with standard 8051 toolchains and debug infrastructure.
Technical Context
The P80C32SBPN,112 implements a static CMOS 80C51 core with full Boolean processing, 64 KB external program/data addressing, and dual data pointers. Its architecture supports zero-frequency operation, enabling deterministic low-power sleep states without data loss.
Timer 2 provides configurable capture, auto-reload (up/down), and baud-rate generation modes via T2CON and T2MOD registers; serial port supports framing error detection and automatic address recognition in multi-processor mode, with independent transmit/receive clock sources selectable between Timer 1 and Timer 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 80C51-compatible static 8-bit architecture with Boolean processor and 12-clock-cycle instruction set |
| RAM Size | 256 × 8 bytes on-chip RAM-sufficient for real-time interrupt service routines and small control stacks |
| Max Clock Frequency | 33 MHz at VCC = 5 V-enables high-throughput polling and timer-driven I/O without external acceleration |
| Supply Voltage Range | 2.7 V to 5.5 V-supports direct interface with 3.3 V logic and legacy 5 V systems without level-shifting |
| Power Modes | Idle mode (CPU halted, peripherals active) and power-down mode (oscillator stopped, RAM retained down to 2.0 V) |
| Serial Interface | Full-duplex UART with framing error detection, automatic address recognition, and programmable SMOD bit for doubled baud rate |
| Interrupt System | Six interrupt sources with four priority levels and nested interrupt capability-enables responsive real-time event handling |
Pinout & Package
Package: Plastic Dual In-line Package (PDIP), 40-pin, SOT129-1, commercial temperature range (0 °C to +70 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 40) | Power supply input | Primary 2.7–5.5 V supply rail for all internal logic and I/O drivers |
| VSS (Pin 20) | Ground reference | 0 V return path; must be low-impedance to prevent latch-up during power transitions |
| P0.0–P0.7 (Pins 32–39) | Multiplexed address/data bus | Open-drain outputs with internal pull-ups; used as AD0–AD7 during external memory access |
| P1.0–P1.7 (Pins 1–8) | General-purpose I/O port | Internal pull-ups enable direct switch sensing; P1.0 supports programmable 61 Hz–4 MHz clock-out |
| P2.0–P2.7 (Pins 21–28) | High-order address bus / I/O | Outputs A8–A15 during 16-bit external memory access; retains port function when not addressing |
| P3.0–P3.7 (Pins 10–17) | Secondary-function I/O port | Provides RxD/TxD, INT0/INT1, T0/T1, WR/RD-enables hardware handshaking and external interrupt triggering |
| RST (Pin 9) | Reset input | Active-high asynchronous reset requiring ≥2 machine cycles (24 oscillator periods) for reliable initialization |
| XTAL1/XTAL2 (Pins 19/18) | Oscillator interface | Supports crystal (1–33 MHz), ceramic resonator, or external clock source on XTAL1 only |
| ALE (Pin 30) | Address latch enable | 1/6 oscillator frequency strobe for external address latching; disableable via AUXR.0 for reduced EMI |
| PSEN (Pin 29) | Program store enable | Active-low read strobe for external program memory-asserted twice per machine cycle during code fetch |
| EA/VPP (Pin 31) | External access control | Low = execute from external ROM; high = execute from internal ROM (not applicable for ROMless P80C32) |
Key Features
| Feature | Design Value |
|---|---|
| Static CMOS design | Enables true zero-frequency operation-clock can be stopped/resumed without RAM or register corruption |
| Programmable clock-out on P1.0 | Generates precise 50% duty-cycle output (61 Hz–4 MHz @ 16 MHz) for system synchronization or test signal generation |
| Timer 2 with up/down auto-reload | Configurable counting direction via T2EX pin-supports quadrature decoding and bidirectional position tracking |
| Independent UART transmit/receive clocks | TCLK/RCLK bits allow different baud rates for TX/RX-enables asymmetric communication with legacy modems or fieldbus nodes |
| Low-EMI ALE inhibit | AUXR.0 disables ALE except during MOVX instructions-reduces radiated emissions in noise-sensitive environments |
Applications
| Industrial PLC I/O Module | Legacy Automotive Diagnostic Tool |
|---|---|
Use Scenario: Standalone digital I/O expansion module interfacing with Modbus RTU over RS-485 in factory floor controllers. IC Role / Device Role / Timing Role: Primary controller executing protocol stack, managing GPIO scan timing, and generating UART baud clocks via Timer 2. Use Value: 33 MHz operation ensures sub-millisecond response to Modbus query frames; power-down mode enables battery-backed sleep during idle periods. | Use Scenario: Handheld OBD-I diagnostic reader communicating with pre-1996 vehicle ECUs using proprietary ASCII command sets. IC Role / Device Role / Timing Role: UART interface controller with software-configurable baud rates and framing error recovery for non-standard protocols. Use Value: Full-duplex UART with automatic address recognition allows selective response in multi-node K-Line networks; 2.7 V minimum supply supports coin-cell backup. |
| Medical Infusion Pump Controller | Energy Meter Firmware Loader |
Use Scenario: Safety-critical motor sequencing and sensor monitoring unit in Class II medical devices with watchdog-free operation. IC Role / Device Role / Timing Role: Real-time task scheduler using Timer 0/1 interrupts and serial bootloader via P3.0/P3.1. Use Value: Four-level nested interrupt prioritization ensures immediate response to occlusion or air-in-line alarms; idle mode reduces thermal load during infusion pauses. | Use Scenario: Field-upgradable firmware loader embedded in utility meters, accepting encrypted HEX files over RS-232. IC Role / Device Role / Timing Role: Secure boot manager verifying signature before writing to external Flash via MOVX @DPTR. Use Value: 64 KB external program/data addressing enables large firmware images; dual data pointer accelerates Flash page writes without CPU overhead. |
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-UM | Integrated 32 KB Flash, 1 KB RAM, 33 MHz max, same PDIP-40 package | Eliminates need for external EPROM; supports in-system programming but lacks Timer 2 capture mode | Select when firmware updates in field are required and external memory interface is unnecessary |
| DS80C320-QCL+ | Enhanced 8051 core, 33 MHz, 256 B RAM, integrated power-fail reset, same pinout | Includes brown-out detection and faster MOVX execution but requires external crystal for >20 MHz operation | Select for higher reliability in unregulated power environments where supply monitoring is critical |
Compared with AT89C51RC2-UM and DS80C320-QCL+, the P80C32SBPN,112 offers guaranteed static operation and full Timer 2 feature set-including up/down counting and external event capture-making it uniquely suitable for deterministic real-time control where clock gating and precise edge-triggered timing are essential.
Availability
P80C32SBPN,112 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, legacy automotive diagnostic tools, medical infusion pump controllers, and energy meter firmware loaders requiring stable component supply and long-term obsolescence management.
Supply support for P80C32SBPN,112 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 pioneer in CMOS microcontroller technology, delivering high-reliability, industry-qualified ICs for mission-critical embedded systems since the 1980s.
The 80C31/80C32 product line was designed specifically for ROMless 8051-based control applications requiring low-voltage operation, static design robustness, and seamless integration with legacy 8051 development ecosystems.
FAQ
What is the maximum operating frequency of the P80C32SBPN,112?
The P80C32SBPN,112 supports a maximum operating frequency of 33 MHz at VCC = 5 V. This rating is validated for the PDIP-40 package (SOT129-1) across the 0 °C to +70 °C commercial temperature range. Operation at 33 MHz requires a stable crystal or clock source with ≤30 pF load capacitance and proper decoupling per Philips Application Note AN103.
Does the P80C32SBPN,112 include on-chip ROM or Flash memory?
No, the P80C32SBPN,112 is a ROMless device-it contains no on-chip non-volatile program memory. It executes code exclusively from external program memory (e.g., EPROM or Flash) accessed via P0 and P2 address/data buses. The "32" in its part number denotes 256 × 8 bytes of on-chip RAM, not ROM capacity.
How does the power-down mode work on the P80C32SBPN,112?
In power-down mode, the P80C32SBPN,112 stops the oscillator and disables all peripherals except RAM and Special Function Registers, which retain their values down to 2.0 V. Wake-up is triggered by hardware reset or external interrupt on INT0/INT1 (level-sensitive). The WUPD bit in AUXR1 controls interrupt wake-up enablement; for P80C32SBPN,112, wake-up is always enabled per datasheet specification.
Can the P80C32SBPN,112 generate two independent UART baud rates?
Yes, the P80C32SBPN,112 supports independent transmit and receive baud rates via Timer 2. Setting TCLK = 1 selects Timer 2 for transmit clocking, while RCLK = 1 selects it for receive clocking-allowing asymmetric rates in UART modes 1 and 3. This capability is confirmed in the "Baud Rate Generator Mode" section of the Philips 80C31/80C32 datasheet (2000 Aug 07, pp. 13–14).
What is the function of the ALE pin on the P80C32SBPN,112?
The ALE (Address Latch Enable) pin on the P80C32SBPN,112 emits a 1/6 oscillator frequency pulse during external memory accesses to latch the low-order address from Port 0. It can be disabled via the AUXR.0 bit to reduce EMI-when disabled, ALE activates only during MOVX instructions. This behavior is identical across all 80C32 variants and is documented in the "PIN DESCRIPTIONS" table (p. 6).
P80C32SBPN,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 40-DIP (0.600", 15.24mm)
- Series:
- 80C
- Packaging:
- Tube
- 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:
- Through Hole
- Supplier Device Package:
P80C32SBPN,112 FAQ
1.How can I place an order for P80C32SBPN,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for P80C32SBPN,112 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 P80C32SBPN,112 reliable?
The price and inventory of P80C32SBPN,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P80C32SBPN,112 is usually 5 days.
3.What payment methods are accepted for P80C32SBPN,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P80C32SBPN,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P80C32SBPN,112?
P80C32SBPN,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P80C32SBPN,112 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 P80C32SBPN,112?
For technical support, including P80C32SBPN,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P80C32SBPN,112 requirements.
6.How does Aetrix verify that P80C32SBPN,112 is sourced from the original manufacturer or authorized distributors?
All P80C32SBPN,112 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 P80C32SBPN,112 meets industry standards.
7.What is the process for return or replacement of P80C32SBPN,112?
All P80C32SBPN,112 units undergo pre-shipment inspection (PSI). If there is an issue with P80C32SBPN,112, 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 P80C32SBPN,112 part is unused and in its original packaging.
Return procedure for P80C32SBPN,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P80C32SBPN,112 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
