My Inquiry
My Account
NXP Semiconductors P89C52X2BBD/00,557
- Part No.:
- P89C52X2BBD/00,557
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-LQFP
- Datasheet:
-
P89C52X2BBD/00,557.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 44LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,646
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P89C52X2BBD/00,557 from NXP Semiconductors (formerly Philips Semiconductors) is an 8-bit Flash microcontroller based on the enhanced 80C51 core, featuring 8 KB on-chip Flash program memory, 256 bytes of RAM, three 16-bit timers/counters (T0, T1, T2), full-duplex UART with framing error detection and automatic address recognition, and support for both 6-clock and 12-clock operation modes. It operates from 0–20 MHz (6-clk) or 0–33 MHz (12-clk) at 5 V and targets embedded control applications requiring non-volatile code storage, low-power operation, and legacy 8051 software compatibility.
For engineers reviewing the P89C52X2BBD/00,557 datasheet, P89C52X2BBD/00,557 pinout, P89C52X2BBD/00,557 application, or P89C52X2BBD/00,557 equivalent, key selection considerations include its LQFP44 package, 256-byte RAM capacity, dual power-reduction modes (idle and power-down), programmable clock-out on P1.0, and Flash endurance of 10,000 program/erase cycles - all critical for industrial control, instrumentation, and legacy system upgrades.
Technical Context
This device implements a static CMOS 80C51-compatible CPU with extended features including Timer 2 (capture/compare), dual data pointers, four interrupt priority levels, six interrupt sources, and asynchronous port reset. Its architecture supports external memory expansion up to 64 KB ROM and 64 KB RAM via multiplexed Port 0 (AD0–AD7) and Port 2 (A8–A15).
The Flash memory is organized as 8 KB of non-volatile program storage with three security bits, chip-erase capability, and 10-year data retention. Clock control is managed via CKCON register (X2 bit) and Flash-configurable FX2 bit, enabling runtime or factory-set selection between 6-clock (2× speed) and 12-clock operation - directly affecting instruction throughput and peripheral timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | Enhanced 80C51 CPU with Boolean processor and static design enabling 0 MHz clock stop |
| Flash Memory | 8 KB on-chip Flash EPROM; supports 10,000 erase/program cycles and 10-year data retention |
| RAM | 256 bytes internal RAM; retains contents in idle mode and down to 2.0 V in power-down mode |
| Timers/Counters | Three 16-bit timers: T0/T1 (standard 80C51) + T2 (enhanced capture/compare with reload) |
| Serial Interface | Full-duplex UART with framing error detection, automatic address recognition, and baud-rate generation |
| Operating Frequency | 0–20 MHz (6-clock mode) or 0–33 MHz (12-clock mode) at 5 V ±10%; zero-frequency static operation supported |
| I/O Pins | 32 configurable bidirectional I/O lines across four 8-bit ports (P0–P3), with internal pull-ups on P1/P2/P3 |
Pinout & Package
LQFP44 package (SOT389-1), 10 × 10 mm body, 0.8 mm pitch, lead-free compatible, rated for 0 °C to +70 °C ambient operation.
| 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 during Flash programming |
| P1.0–P1.7 | Port 1 bidirectional I/O | Internal pull-up port; P1.0/T2 and P1.1/T2EX provide Timer 2 capture/reload/clock-out functions |
| P2.0–P2.7 | Port 2 bidirectional I/O / A8–A15 | High-order address bus for 16-bit external memory addressing; emits P2 SFR content during 8-bit MOVX @Ri |
| 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 (external memory strobes) |
| RST | Reset input | Active-high reset requiring ≥2 machine cycles; internal diffused resistor enables power-on reset with external capacitor |
| XTAL1/XTAL2 | Oscillator input/output | Supports crystal/resonator (1–33 MHz) or external clock drive on XTAL1; XTAL2 left unconnected in external clock mode |
| EA/VPP | External Access Enable / Programming Voltage | High = execute from internal Flash; low = fetch from external program memory (0000H–1FFFH); receives 5 V/12 V during Flash programming |
| ALE/PROG | Address Latch Enable / Programming Pulse | Outputs 1/6 (12-clk) or 1/3 (6-clk) oscillator frequency for external latch timing; serves as PROG pulse during Flash programming |
| PSEN | Program Store Enable | Active-low read strobe for external program memory; disabled during internal code execution |
| VCC/VSS | Power supply / Ground | 5 V ±10% operation; VSS is 0 V reference; voltage on any pin must stay within VCC + 0.5 V / VSS – 0.5 V to prevent latch-up |
Key Features
| Feature | Design Value |
|---|---|
| 6-clock / 12-clock selectable operation | Runtime switchable via CKCON.X2 bit; doubles instruction throughput in 6-clock mode without hardware change |
| Programmable clock-out on P1.0 | Generates 50% duty cycle output (61 Hz–4 MHz at 16 MHz 12-clk; 122 Hz–8 MHz at 6-clk) using Timer 2 reload registers |
| Low EMI design | Includes ALE inhibit, slew-rate controlled outputs, and 6-clock mode to reduce radiated emissions in noise-sensitive systems |
| Wake-up from Power Down | Enabled via AUXR1.WUPD bit; allows exit by level-sensitive INT0 or INT1 while preserving RAM and SFR contents |
| ONCE™ On-Circuit Emulation mode | Entered by holding ALE low during reset; places Port 0 in high-impedance state for in-system debugging without socket removal |
Applications
| Industrial Control Panel | Legacy Equipment Retrofit |
|---|---|
|
Use Scenario: Standalone logic controller managing relay banks, sensor inputs, and status LEDs in factory automation cabinets. IC Role / Device Role / Timing Role: Primary MCU executing ladder-logic emulation firmware, handling polled I/O scanning and UART-based HMI communication. Use Value: 8 KB Flash accommodates feature-rich control firmware; 256-byte RAM supports real-time variable storage; LQFP44 footprint fits space-constrained panel PCB layouts. |
Use Scenario: Drop-in replacement for obsolete 8051-based controllers in medical infusion pumps where redesign is prohibited. IC Role / Device Role / Timing Role: Pin- and code-compatible upgrade delivering Flash reprogrammability and extended temperature margin over mask-ROM predecessors. Use Value: Identical instruction timing and SFR map ensure zero firmware changes; 10,000-cycle Flash endurance enables field calibration updates without hardware swap. |
| Embedded Data Logger | Smart Sensor Node |
|
Use Scenario: Battery-powered environmental monitor recording temperature/humidity at 10-second intervals onto SPI EEPROM. IC Role / Device Role / Timing Role: System orchestrator managing ADC sampling, time-stamping via Timer 2, UART logging, and power-state transitions. Use Value: Power-down mode reduces current to µA range while retaining RAM; programmable clock-out synchronizes external ADC sampling; UART framing detection ensures robust host communication. |
Use Scenario: Low-cost node integrating analog sensor signal conditioning, digital I/O, and RS-485 network interface in building HVAC systems. IC Role / Device Role / Timing Role: Central intelligence unit performing sensor linearization, fault detection, and Modbus RTU protocol stack execution. Use Value: Three 16-bit timers enable precise PWM fan control, UART baud-rate generation, and watchdog timeout; 32 I/O lines support direct sensor/actuator interfacing without glue logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit Flash microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT89C52-24PU | 8 KB Flash, 256 B RAM, 24 MHz max (12-clk), PDIP40 only; no 6-clock mode or Timer 2 | Lacks programmable clock-out, capture/compare, and low-power wake-up features; limited to through-hole assembly | Select when cost-sensitive DIP-based designs require basic 8051 compatibility without advanced peripherals |
| P89V51RD2FA | 64 KB Flash, 1024 B RAM, same LQFP44 package; adds ISP via UART, enhanced interrupt vectoring, and 4x faster 6-clock mode | Enables field firmware updates and larger application code; higher RAM supports complex protocol stacks | Select when future-proofing for firmware upgrades or expanding functionality beyond 8 KB code space is required |
Compared with AT89C52-24PU, P89C52X2BBD/00,557 offers superior low-power control and timer flexibility; versus P89V51RD2FA, it provides identical pinout and legacy compatibility at lower cost and reduced code density - ideal for stable, volume-manufactured 8051 derivatives.
Availability
P89C52X2BBD/00,557 is available at Aetrix Electronics and suitable for industrial control panels, legacy equipment retrofits, embedded data loggers, smart sensor nodes, and instrumentation systems requiring stable component supply, long-lifecycle support, and proven 8051 ecosystem compatibility.
Supply support for P89C52X2BBD/00,557 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 delivering secure, scalable solutions for automotive, industrial, IoT, and communication infrastructure markets.
The P89C5xX2 family was designed as a Flash-based evolution of the industry-standard 80C51 architecture - targeting cost-sensitive, reliability-critical embedded control applications where code updatability, low power, and pin compatibility with legacy 8051 systems are essential.
FAQ
What is the maximum operating frequency of the P89C52X2BBD/00,557 in 6-clock mode?
The P89C52X2BBD/00,557 supports up to 20 MHz in 6-clock mode at 5 V ±10%. This corresponds to 10 million instructions per second (MIPS) since each instruction executes in one 6-clock cycle. The device remains fully functional down to 0 Hz, enabling ultra-low-power stop-clock operation while preserving RAM and SFR contents - a key advantage for battery-powered P89C52X2BBD/00,557 deployments.
Does the P89C52X2BBD/00,557 support in-system programming (ISP)?
No, the P89C52X2BBD/00,557 does not support ISP. It requires parallel programming via a dedicated programmer that supports the P89C5xX2 algorithm and recognizes the FX2 clock-mode bit. Programming involves applying VPP (5 V or 12 V) to the EA/VPP pin while using the standard 8051 programming protocol. For ISP-capable alternatives, consider the P89V51RD2FA, which adds UART-based in-system programming to the same LQFP44 footprint.
How many interrupt sources and priority levels does the P89C52X2BBD/00,557 support?
The P89C52X2BBD/00,557 supports six interrupt sources - INT0, INT1, Timer 0, Timer 1, Timer 2, and serial port - with four nested priority levels programmable via the IP and IPH registers. Each interrupt source can be individually enabled/disabled and assigned high/low priority, allowing deterministic real-time response in multitasked P89C52X2BBD/00,557 applications such as motor control or protocol arbitration.
Can the P89C52X2BBD/00,557 operate from a 3 V supply?
No, the P89C52X2BBD/00,557 is specified only for 5 V ±10% operation (4.5 V to 5.5 V). Its electrical characteristics, including Flash programming voltage, oscillator stability, and I/O drive strength, are characterized exclusively at 5 V. For 3 V operation, consider the later P89V51RD2FA, which supports 3.0–5.5 V operation and maintains full 8051 compatibility while adding ISP and enhanced peripherals.
What is the purpose of the FX2 bit in the P89C52X2BBD/00,557 Flash configuration?
The FX2 bit is a Flash-configurable clock-mode control bit that forces 6-clock operation regardless of the CKCON.X2 register setting. Programmed only during parallel Flash programming, FX2 overrides software control to lock the P89C52X2BBD/00,557 into high-speed 6-clock mode at power-up - ensuring deterministic timing for time-critical applications without relying on initialization code. This provides factory-set performance assurance independent of runtime register writes.
P89C52X2BBD/00,557 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-LQFP
- Series:
- 89C
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 33MHz
- Connectivity:
- UART/USART
- Peripherals:
- POR
- Number of I/O:
- 32
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- 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:
P89C52X2BBD/00,557 FAQ
1.How can I place an order for P89C52X2BBD/00,557 through Aetrix?
Please submit a Request for Quotation (RFQ) for P89C52X2BBD/00,557 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 P89C52X2BBD/00,557 reliable?
The price and inventory of P89C52X2BBD/00,557 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P89C52X2BBD/00,557 is usually 5 days.
3.What payment methods are accepted for P89C52X2BBD/00,557?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P89C52X2BBD/00,557 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P89C52X2BBD/00,557?
P89C52X2BBD/00,557 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P89C52X2BBD/00,557 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 P89C52X2BBD/00,557?
For technical support, including P89C52X2BBD/00,557 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P89C52X2BBD/00,557 requirements.
6.How does Aetrix verify that P89C52X2BBD/00,557 is sourced from the original manufacturer or authorized distributors?
All P89C52X2BBD/00,557 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 P89C52X2BBD/00,557 meets industry standards.
7.What is the process for return or replacement of P89C52X2BBD/00,557?
All P89C52X2BBD/00,557 units undergo pre-shipment inspection (PSI). If there is an issue with P89C52X2BBD/00,557, 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 P89C52X2BBD/00,557 part is unused and in its original packaging.
Return procedure for P89C52X2BBD/00,557:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P89C52X2BBD/00,557 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…
