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NXP Semiconductors P80C32X2BBD,157
- Part No.:
- P80C32X2BBD,157
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-LQFP
- Datasheet:
-
P80C32X2BBD,157.pdf
- Description:
- IC MCU 8BIT ROMLESS 44LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,361
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Product details
Overview
P80C32X2BBD,157 from NXP Semiconductors (formerly Philips) is a ROMless 8-bit 80C51 microcontroller with 256-byte RAM, three 16-bit timers/counters (T0/T1/T2), full-duplex UART, and 32 I/O lines. It operates at 2.7–5.5 V, supports both 6-clock and 12-clock modes (max 30/33 MHz), and features idle/power-down low-power modes - used in industrial control panels requiring deterministic timing and external memory expansion.
For engineers reviewing the P80C32X2BBD,157 datasheet, P80C32X2BBD,157 pinout, P80C32X2BBD,157 application, or P80C32X2BBD,157 equivalent, key selection criteria include LQFP44 package compatibility, 256-byte RAM capacity, T2 capture/compare capability, programmable clock-out on P1.0, and dual power-mode support for battery-backed systems.
Technical Context
This device implements a static CMOS 80C51 core with enhanced peripherals including Timer 2 (capture/compare/reload), dual data pointers, and a full-duplex UART with framing error detection and automatic address recognition. Its architecture supports zero-frequency operation and software-selectable 6-/12-clock modes via CKCON.X2 bit or OTP OX2 bit.
The LQFP44 package (SOT389-1) provides all 32 I/O lines across Ports 0–3, with Port 0 serving as multiplexed AD0–AD7, Port 2 as A8–A15, and dedicated alternate functions including RxD/TxD, INT0/INT1, T0/T1, WR/RD, and T2/T2EX - enabling direct interfacing to external memory, serial networks, and real-time event triggers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 80C51-compatible static CMOS core supporting 0–33 MHz operation with 6-/12-clock mode selection |
| RAM | 256 bytes internal RAM - sufficient for medium-complexity firmware with stack, buffers, and peripheral registers |
| Timers | Three 16-bit timers: T0/T1 (standard 80C51), T2 (enhanced with capture, compare, reload, and clock-out) |
| Serial Interface | Full-duplex UART with framing error detection, automatic address recognition, and variable baud rate generation |
| Power Modes | Idle mode (CPU halted, peripherals active) and Power-down mode (oscillator stopped, RAM retained down to 2.0 V) |
| Supply Voltage | 2.7 V to 5.5 V - enables direct interface with 3.3 V logic and legacy 5 V systems without level shifters |
| Package | LQFP44 (10 × 10 × 1.4 mm, SOT389-1) - surface-mount compatible with automated PCB assembly |
Pinout & Package
Plastic low-profile quad flat package (LQFP44), 44-pin, body size 10 × 10 × 1.4 mm, lead pitch 0.8 mm, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0.0–P0.7 | Port 0 bidirectional I/O / AD0–AD7 | Open-drain port; multiplexed address/data bus for external memory access - requires external pull-ups for reliable read/write |
| P1.0/T2 | Port 1.0 / Timer 2 external count input | Configurable as general I/O or T2 clock input; also supports programmable 50% duty cycle clock-out (61 Hz–4 MHz) |
| P1.1/T2EX | Port 1.1 / Timer 2 capture/reload control | Enables edge-triggered capture, auto-reload, or direction control for T2 - critical for pulse-width measurement |
| P2.0–P2.7 | Port 2 bidirectional I/O / A8–A15 | Provides high-order address bits during 16-bit external memory accesses - essential for >256-byte code/data space |
| P3.0/RxD | Port 3.0 / Serial input | UART receive input with Schmitt-triggered input - tolerant of noisy industrial serial lines |
| P3.1/TxD | Port 3.1 / Serial output | UART transmit output with push-pull drive - supports RS-232 level-shifting or direct TTL-level communication |
| RST | Reset input | Active-high reset requiring ≥2 machine cycles (24/12 oscillator periods); internal weak pull-down enables capacitor-based POR |
| XTAL1/XTAL2 | Oscillator input/output | Supports crystal (1–33 MHz), ceramic resonator, or external clock source - determines system timing precision and jitter |
| EA/VPP | External Access Enable / Programming voltage | Low = execute from external program memory; high = execute from internal ROM/OTP - controls boot source selection |
| ALE/PROG | Address Latch Enable / EPROM programming pulse | Outputs 1/6 (12-clock) or 1/3 (6-clock) oscillator frequency - used to latch P0 address/data during external memory access |
Key Features
| Feature | Design Value |
|---|---|
| Timer 2 with Capture/Compare | Enables precise input capture (e.g., motor encoder pulses) and PWM generation without CPU intervention |
| Programmable Clock-Out on P1.0 | Generates stable 50% duty-cycle clocks up to 4 MHz (12-clock) for synchronizing external logic or ADC sampling |
| 6-/12-Clock Mode Selectability | Software-switchable via CKCON.X2 bit - allows runtime performance scaling (e.g., 33 MHz for burst processing, 16 MHz for low-noise operation) |
| Low-Power Static Design | Zero-frequency operation supported; idle mode retains full peripheral state while reducing current draw by >90% vs. active mode |
| Enhanced UART with Framing Detection | Detects UART framing errors in hardware - eliminates software polling overhead and improves serial protocol robustness |
Applications
| Industrial PLC I/O Module | Legacy Equipment Retrofit Controller |
|---|---|
Use Scenario: Real-time monitoring of 16 digital inputs and control of 16 relay outputs in DIN-rail mounted automation modules. IC Role / Device Role / Timing Role: Central controller executing ladder logic scan cycles with deterministic 10 ms intervals using Timer 2 as system tick generator. Use Value: 256-byte RAM accommodates I/O image buffer and scan state; T2 capture handles encoder feedback; UART enables Modbus RTU master/slave communication. | Use Scenario: Replacing obsolete 8051-based controllers in HVAC control panels with minimal PCB redesign. IC Role / Device Role / Timing Role: Drop-in replacement executing existing firmware binary with identical pinout and memory map - leveraging same DIP-to-LQFP adapter footprint. Use Value: Pin-compatible with legacy P80C31X2BN/P80C32X2BN; supports same 6-clock timing; LQFP44 reduces board area by 40% vs. DIP40. |
| Smart Sensor Node with External Memory | Low-Power Data Logger |
Use Scenario: Environmental sensor hub aggregating temperature, humidity, and CO₂ readings, storing hourly logs in external EEPROM/Flash. IC Role / Device Role / Timing Role: Host MCU managing I²C sensor reads, SPI Flash writes, and UART telemetry upload - coordinated via Timer 0 interrupt-driven scheduling. Use Value: Dual data pointers accelerate external memory transfers; 32 I/O lines support parallel sensor interfaces; 2.7 V min supply enables coin-cell backup operation. | Use Scenario: Battery-powered field logger recording analog sensor data every 5 minutes for 6 months using ultra-low quiescent current. IC Role / Device Role / Timing Role: Sleep-wake controller using Power-down mode between samples, awakened by Timer 2 overflow or external interrupt. Use Value: Power-down current < 10 µA at 3 V; RAM retention down to 2.0 V ensures data integrity during brownout; T2 auto-reload enables precise 5-minute intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT89C51RC2-UM | 8 KB Flash (vs. ROMless), 256-byte RAM, same 8051 core, but lacks T2 and programmable clock-out | Requires external bootloader for firmware updates; no hardware capture capability for encoder inputs | Select when Flash reprogrammability is required and T2 functionality is unused |
| P89C51RD2BN,557 | 64 KB Flash, 1.25 KB RAM, enhanced UART with FIFO, but incompatible pinout and higher VCC min (4.5 V) | Cannot replace P80C32X2BBD,157 without PCB redesign; unsuitable for 3.3 V systems | Select for new designs needing larger code space and integrated USB bridge - not for drop-in replacement |
Compared with AT89C51RC2-UM and P89C51RD2BN,557, the P80C32X2BBD,157 delivers deterministic real-time response via Timer 2 capture and low-voltage operation down to 2.7 V - making it uniquely suited for cost-sensitive industrial retrofits where external memory and precise edge timing are mandatory.
Availability
P80C32X2BBD,157 is available at Aetrix Electronics and suitable for industrial control panels, legacy equipment retrofit programs, and smart sensor nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant LQFP packaging.
Supply support for P80C32X2BBD,157 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 company formed from the spin-off of Philips Semiconductors in 2006, specializing in secure connectivity solutions and automotive, industrial, and IoT microcontrollers.
The P80C32X2BBD,157 belongs to the legacy 80C51 family designed for cost-effective, deterministic real-time control in industrial and instrumentation applications - emphasizing low-power static operation, external memory expansion, and hardware timer precision over modern peripherals like USB or Ethernet.
FAQ
What is the maximum operating frequency of the P80C32X2BBD,157?
The P80C32X2BBD,157 supports up to 33 MHz in 12-clock mode at 5 V ±10%, and up to 16 MHz across the full 2.7–5.5 V supply range. At 3 V, the maximum frequency is 16 MHz in both 6- and 12-clock modes per the official Philips product data sheet dated 2003 Jan 24. The P80C32X2BBD,157 does not support 30/33 MHz operation below 4.5 V.
Does the P80C32X2BBD,157 include on-chip ROM or flash memory?
No, the P80C32X2BBD,157 is a ROMless variant - it contains no internal program memory and requires external ROM, EPROM, or Flash for code execution. This is confirmed by its part number derivation ('3' = ROMless) and ordering information tables in the Philips datasheet. The P80C32X2BBD,157 relies on EA/VPP pin configuration and external memory interfacing via P0/P2 buses.
What package type and pin count does the P80C32X2BBD,157 use?
The P80C32X2BBD,157 uses a plastic low-profile quad flat package (LQFP44) with 44 leads, body dimensions 10 × 10 × 1.4 mm, and lead pitch 0.8 mm (SOT389-1). This is explicitly stated in the "P80C32X2 ORDERING INFORMATION" section of the Philips product data sheet, distinguishing it from PLCC44 and DIP40 variants of the same family.
Can the P80C32X2BBD,157 operate from a 3.3 V supply?
Yes, the P80C32X2BBD,157 is fully specified for operation from 2.7 V to 5.5 V, including standard 3.3 V systems. Its DC electrical characteristics, oscillator stability, and I/O voltage levels are guaranteed across this range. The P80C32X2BBD,157 maintains full functionality - including UART, timers, and external memory interface - at 3.3 V, with maximum clock frequency limited to 16 MHz.
What is the function of the T2EX (P1.1) pin on the P80C32X2BBD,157?
The T2EX (P1.1) pin on the P80C32X2BBD,157 serves as the Timer 2 external reload/capture/counter direction control input. When configured for capture mode, it triggers T2 reload on rising/falling edges; in counter mode, it controls counting direction. This function is documented in the "PIN DESCRIPTIONS" section (page 10) and "TIMER 2 OPERATION" subsection of the Philips datasheet for the P80C3xX2 family.
P80C32X2BBD,157 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-LQFP
- Series:
- 80C
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 33MHz
- Connectivity:
- EBI/EMI, 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:
P80C32X2BBD,157 FAQ
1.How can I place an order for P80C32X2BBD,157 through Aetrix?
Please submit a Request for Quotation (RFQ) for P80C32X2BBD,157 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 P80C32X2BBD,157 reliable?
The price and inventory of P80C32X2BBD,157 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P80C32X2BBD,157 is usually 5 days.
3.What payment methods are accepted for P80C32X2BBD,157?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P80C32X2BBD,157 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P80C32X2BBD,157?
P80C32X2BBD,157 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P80C32X2BBD,157 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 P80C32X2BBD,157?
For technical support, including P80C32X2BBD,157 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P80C32X2BBD,157 requirements.
6.How does Aetrix verify that P80C32X2BBD,157 is sourced from the original manufacturer or authorized distributors?
All P80C32X2BBD,157 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 P80C32X2BBD,157 meets industry standards.
7.What is the process for return or replacement of P80C32X2BBD,157?
All P80C32X2BBD,157 units undergo pre-shipment inspection (PSI). If there is an issue with P80C32X2BBD,157, 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 P80C32X2BBD,157 part is unused and in its original packaging.
Return procedure for P80C32X2BBD,157:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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