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NXP Semiconductors P89V52X2FBD,157
- Part No.:
- P89V52X2FBD,157
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-LQFP
- Datasheet:
-
P89V52X2FBD,157.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 44LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,404
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Product details
Overview
P89V52X2FBD,157 from NXP Semiconductors is an 8-bit 80C51 microcontroller with 8 kB on-chip flash program memory, 256 B internal RAM, and 192 B data EEPROM. It operates at up to 40 MHz in 12× mode, supports 6-clock/12-clock software-selectable CPU timing, and features three 16-bit timers/counters, four 8-bit I/O ports, and enhanced UART - deployed in industrial control panels requiring deterministic real-time response and field-upgradable firmware.
For engineers reviewing the P89V52X2FBD,157 datasheet, P89V52X2FBD,157 pinout, P89V52X2FBD,157 application, or P89V52X2FBD,157 equivalent, key selection criteria include LQFP44 package compatibility, dual data pointer support for efficient external memory access, low-power idle/power-down modes with external interrupt wake-up, and drop-in software compatibility with legacy P87C52 and P89C52X2 devices.
Technical Context
The P89V52X2FBD,157 implements a standard 80C51 CPU core with extended functionality including a second DPTR register (AUXR1.DPS), programmable ALE control (AUXR.AO), and dual 16-bit timer/counters (T0/T1) plus Timer 2 with capture/reload capability. Its memory map comprises 8 kB flash (CODE), 256 B RAM (IDATA), 192 B EEPROM, and SFR space - all accessible via MOV, MOVX, and MOVC instructions.
It supports two clock modes: default 12-clock-per-machine-cycle (ALE @ 1/6 fosc) and optional 6-clock mode (ALE @ 1/3 fosc), selected either by non-volatile FX2 bit or SFR X2 bit. Power management includes Idle mode (CPU halted, peripherals active) and Power-down mode (all clocks stopped, external interrupt wake-up only).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit 80C51-compatible CPU with 20 MHz max in 6× mode, 40 MHz in 12× mode - determines instruction throughput and real-time latency bounds. |
| Flash Memory | 8 kB on-chip user code flash - enables in-system programming (ICP) and field firmware updates without external programmer hardware. |
| RAM & EEPROM | 256 B internal RAM + 192 B data EEPROM - provides nonvolatile parameter storage and runtime variable space without external memory chips. |
| Timers/Counters | Three 16-bit timers/counters (T0, T1, T2) with capture, reload, and gate control - supports precise PWM generation, pulse-width measurement, and baud-rate timing. |
| I/O Ports | Four 8-bit bidirectional ports (P0–P3), with P1[5–7] rated for 16 mA drive - allows direct LED driving and interface to discrete logic without buffer ICs. |
| UART | Enhanced UART with SMOD0/SMOD1 baud rate control - delivers flexible serial communication across wide oscillator tolerances and supply voltages. |
| Security & Control | Three security bits, programmable clock-out pin, ALE inhibit (low-EMI mode) - enables IP protection and EMI-sensitive embedded deployments. |
Pinout & Package
Package: LQFP44 (plastic low-profile quad flat package; 44 leads; body 10 × 10 × 1.4 mm; SOT389-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0[0]/AD0 – P0[7]/AD7 | Port 0 bidirectional I/O / multiplexed address/data bus | Open-drain outputs with internal pull-ups; used as general-purpose I/O or low-byte address/data during external memory access - requires external pull-ups for robust GPIO use. |
| P1[0]/T2, P1[1]/T2EX | Port 1 bit 0/1 with Timer 2 functions | T2 = external count input or Timer 2 clock-out; T2EX = capture/reload trigger and direction control - enables high-resolution event timing and frequency synthesis. |
| P2[0]/A8 – P2[7]/A15 | Port 2 bidirectional I/O / high-order address bus | Provides upper address byte for external memory access (MOVX @DPTR); internal pull-ups allow direct connection to address lines without buffers. |
| P3[0]/RXD, P3[1]/TXD | Serial port input/output | Full-duplex UART interface with TTL-level signaling - supports RS-232 level-shifting or direct connection to other 5 V logic devices. |
| P3[2]/INT0, P3[3]/INT1 | External interrupt inputs | Edge-triggered (configurable via IT0/IT1) or level-sensitive interrupts - enables fast response to critical sensor or control signals (e.g., emergency stop, encoder zero-crossing). |
| XTAL1, XTAL2 | Crystal oscillator inputs | Supports quartz crystals (20–30 pF load) or ceramic resonators (40–50 pF load); internal inverting amplifier eliminates need for external oscillator circuitry. |
| EA, ALE, PSEN | Memory interface control signals | EA = external access enable (strap to VDD for internal-only execution); ALE = address latch enable (programmable frequency); PSEN = external program memory read strobe - defines boot source and memory expansion capability. |
| RST, VDD, VSS | Reset, power supply, ground | RST requires ≥2 machine cycles HIGH for valid reset; VDD = 4.5–5.5 V operation; VSS = reference ground - ensures reliable startup and stable analog/digital coexistence. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Data Pointer (DPTR0/DPTR1) | Enables concurrent access to two external memory regions without software-managed register save/restore - accelerates block copy and DMA-like operations in resource-constrained systems. |
| Software-Selectable Clock Mode | Switch between 6-clock and 12-clock CPU timing via SFR X2 or non-volatile FX2 bit - balances performance vs. power consumption without hardware changes or oscillator redesign. |
| Low-Power Modes | Idle mode halts CPU while preserving RAM and peripheral state; Power-down mode stops all clocks and reduces current to µA range - extends battery life in portable instrumentation. |
| Programmable ALE Output | ALE can be disabled (AUXR.AO = 1) or run at 1/2 fosc - eliminates switching noise in EMI-sensitive applications like medical sensors or audio front-ends. |
| Second DPTR Register | Eliminates software overhead when managing multiple external memory buffers - improves efficiency of bootloader routines and multi-buffer communication stacks. |
| Enhanced UART with SMOD0/SMOD1 | Supports 16× and 32× baud rate dividers - maintains accurate serial timing across wide temperature ranges and voltage variations without crystal trimming. |
Applications
| Industrial PLC I/O Module | Legacy Equipment Retrofit Controller |
|---|---|
|
Use Scenario: Replacing obsolete P87C52-based logic controllers in factory-floor motor drives and valve sequencers with field-programmable firmware. IC Role / Device Role / Timing Role: Main system controller executing ladder logic scan cycles, managing discrete I/O via P0–P3, and communicating over RS-485 via enhanced UART. Use Value: Drop-in software compatibility preserves existing firmware investment; 192 B EEPROM stores calibration offsets and runtime configuration without external NV memory. |
Use Scenario: Upgrading aging test equipment control boards where PCB layout cannot be modified but higher reliability and flash reprogrammability are required. IC Role / Device Role / Timing Role: Pin-compatible replacement for P89C52X2 in fixed-layout designs, using identical LQFP44 footprint and signal mapping. Use Value: Same pinout and electrical characteristics eliminate board rework; 8 kB flash enables feature-rich diagnostics and self-test routines previously impossible with mask-ROM variants. |
| Smart Sensor Node | Energy-Metering Front-End |
|
Use Scenario: Compact environmental sensor node collecting temperature/humidity data and transmitting via UART-to-LoRaWAN gateway. IC Role / Device Role / Timing Role: Low-power host MCU managing ADC interface, EEPROM-stored calibration coefficients, and UART-based packet framing. Use Value: Power-down mode with external interrupt wake-up extends battery life to >5 years; programmable clock-out pin synchronizes external ADC sampling. |
Use Scenario: Residential electricity meter requiring tamper-resistant firmware, secure parameter storage, and precise timing for energy accumulation. IC Role / Device Role / Timing Role: System-on-chip controller handling metrology interface, LCD driver, IR/RS-485 comms, and secure billing data logging. Use Value: Three security bits prevent unauthorized firmware extraction; dual timers support simultaneous pulse counting (kWh) and real-time clock generation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 80C51 microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| P89V51RD2FBD,157 | Same LQFP44 package, 64 kB flash, 1024 B RAM, no data EEPROM - lacks 192 B EEPROM but adds ISP capability and larger memory. | Preferred for new designs needing larger code space and field firmware upgrades; unsuitable where EEPROM-based parameter retention is mandatory. | Select P89V51RD2FBD,157 only if EEPROM is not required and larger flash/RAM justifies migration effort. |
| AT89C52-24PI | 40-pin DIP package, 8 kB flash, 256 B RAM, no data EEPROM, 24 MHz max - lacks dual DPTR, Timer 2, and low-power modes. | Suitable for cost-sensitive, non-battery-powered legacy replacements where PCB has DIP40 socket and no EEPROM dependency exists. | Choose AT89C52-24PI only for DIP40-based designs without EEPROM or advanced timer requirements; not drop-in compatible with P89V52X2FBD,157's LQFP44 footprint. |
Compared with P89V52X2FBD,157, the P89V51RD2FBD,157 offers greater memory headroom but removes EEPROM-based nonvolatile storage, while the AT89C52-24PI sacrifices package compatibility, advanced peripherals, and low-power operation for lower unit cost in through-hole assemblies.
Availability
P89V52X2FBD,157 is available at Aetrix Electronics and suitable for industrial automation, legacy equipment modernization, and smart sensor node designs requiring stable component supply, long-term lifecycle assurance, and full traceability.
Supply support for P89V52X2FBD,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 leader focused on secure connectivity solutions for automotive, industrial, and IoT applications.
The P89V52X2FBD,157 belongs to NXP's legacy 80C51 microcontroller family, designed specifically for cost-effective, pin-compatible upgrades of aging MCS-51-based systems while adding flash programmability, EEPROM, and enhanced peripherals.
FAQ
What is the maximum operating frequency of the P89V52X2FBD,157?
The P89V52X2FBD,157 supports up to 40 MHz in 12× mode and 20 MHz in 6× mode. The actual maximum frequency depends on supply voltage and ambient temperature per the datasheet's AC characteristics table. Operation above 20 MHz requires stable 5.0 V ±5% supply and proper decoupling near VDD/VSS pins. The P89V52X2FBD,157 must be configured correctly via FX2 bit or X2 SFR to achieve rated speed.
Does the P89V52X2FBD,157 include built-in EEPROM memory?
Yes, the P89V52X2FBD,157 integrates 192 B of data EEPROM for nonvolatile parameter storage. This memory is separate from the 8 kB flash program memory and 256 B RAM, and supports byte-level reads/writes with 10,000 erase/write cycles and 100-year data retention. The P89V52X2FBD,157 uses dedicated SFR registers (FMCMD, FMDATA, FMADRH/L) to manage EEPROM operations.
Is the P89V52X2FBD,157 pin-compatible with the P87C52?
Yes, the P89V52X2FBD,157 is explicitly designed as a drop-in and software-compatible replacement for the P87C52, P87C52X2, P89C52, and P89C52X2. For the LQFP44 variant (P89V52X2FBD,157), pin mapping matches the P89C52X2FA (PLCC44) and P89C52X2FBD (LQFP44) - all share identical signal assignments, drive strength, and timing specifications per NXP's ordering information table.
How does the dual data pointer function in the P89V52X2FBD,157?
The P89V52X2FBD,157 implements two independent 16-bit data pointers (DPTR0 and DPTR1), selected via the DPS bit in AUXR1 (address A2H). When DPS = 0, MOVX instructions use DPTR0; when DPS = 1, they use DPTR1. This enables efficient block transfers between two external memory regions without software-managed register swapping - a key advantage in bootloader and communication stack implementations within the P89V52X2FBD,157.
What power-saving modes does the P89V52X2FBD,157 support?
The P89V52X2FBD,157 supports Idle mode (CPU halted, peripherals and RAM active) and Power-down mode (all clocks stopped, RAM retained, wake-up via external interrupt only). Both modes are entered via the IDL and PD bits in PCON. In Power-down mode, supply current drops to <10 µA, making the P89V52X2FBD,157 suitable for battery-powered applications requiring multi-year operation.
P89V52X2FBD,157 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-LQFP
- Series:
- 89V
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 40MHz
- Connectivity:
- UART/USART
- Peripherals:
- POR
- Number of I/O:
- 32
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 192 x 8
- RAM Size:
- 256 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
P89V52X2FBD,157 FAQ
1.How can I place an order for P89V52X2FBD,157 through Aetrix?
Please submit a Request for Quotation (RFQ) for P89V52X2FBD,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 P89V52X2FBD,157 reliable?
The price and inventory of P89V52X2FBD,157 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P89V52X2FBD,157 is usually 5 days.
3.What payment methods are accepted for P89V52X2FBD,157?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P89V52X2FBD,157 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P89V52X2FBD,157?
P89V52X2FBD,157 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P89V52X2FBD,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 P89V52X2FBD,157?
For technical support, including P89V52X2FBD,157 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P89V52X2FBD,157 requirements.
6.How does Aetrix verify that P89V52X2FBD,157 is sourced from the original manufacturer or authorized distributors?
All P89V52X2FBD,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 P89V52X2FBD,157 meets industry standards.
7.What is the process for return or replacement of P89V52X2FBD,157?
All P89V52X2FBD,157 units undergo pre-shipment inspection (PSI). If there is an issue with P89V52X2FBD,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 P89V52X2FBD,157 part is unused and in its original packaging.
Return procedure for P89V52X2FBD,157:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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