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NXP Semiconductors PXAG49KBA/00,512
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- Part No.:
- PXAG49KBA/00,512
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
PXAG49KBA/00,512.pdf
- Description:
- IC MCU 16BIT 64KB FLASH 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,398
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Product details
Overview
PXAG49KBA/00,512 from NXP Semiconductors (formerly Philips) is a 16-bit XA eXtended Architecture microcontroller with 64 KB Flash program memory, 2 KB on-chip RAM, dual UARTs, three timers/counters, watchdog timer, and 44-pin PLCC package. It operates at up to 30 MHz at 5 V and supports In-System Programming (ISP) and In-Application Programming (IAP) via integrated Boot ROM.
For engineers reviewing the PXAG49KBA/00,512 datasheet, PXAG49KBA/00,512 pinout, PXAG49KBA/00,512 application, or PXAG49KBA/00,512 equivalent, this device serves as a drop-in upgrade to XA-G3 for embedded control requiring extended memory, dual serial interfaces, and field-upgradable firmware without external programming hardware.
Technical Context
The PXAG49KBA/00,512 implements the 80C51 XA core with 20-bit external addressing capability (up to 1 MB), supporting both 8-bit and 16-bit external data bus widths selected by the BUSW pin at reset. Its memory architecture includes five Flash blocks (two 8 KB + three 16 KB), a 2 KB Boot ROM mapped at F800h–FFFFh, and segmented data memory with direct/indirect addressing modes.
It integrates two enhanced UARTs with independent baud rate generators, Timer 2 with capture/reload and direction control, and programmable I/O ports (P0–P3) with four output configurations per pin. Power management includes Idle and Power-Down modes, with wake-up from Power-Down via external interrupt.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 80C51 XA 16-bit extended instruction set compatible with 8051 software tools and development flow |
| Flash Memory | 64 KB organized in five blocks (2×8 KB + 3×16 KB); supports byte-wise programming and block erasure |
| RAM | 2048 bytes on-chip static RAM with bit-addressable region (00h–7Fh) and segmented access |
| Max Operating Frequency | 30 MHz at 5 V - enables real-time control loop execution within sub-μs timing budgets |
| UART Interfaces | Dual full-duplex UARTs (UART0 and UART1) with independent baud rate generators and framing error detection |
| Timers/Counters | Three 16-bit timers: T0/T1 (standard 8051-compatible) and T2 (enhanced with capture, reload, toggle output) |
| Watchdog Timer | Configurable timeout via WDCON register; reset or interrupt mode selectable; feed sequence requires two SFR writes |
| Operating Voltage | Single 5.0 V ±5% supply - eliminates need for auxiliary voltage rails in industrial control designs |
Pinout & Package
Package: 44-pin Plastic Leaded Chip Carrier (PLCC), SOT187-2, 0°C to +70°C temperature range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pins 23, 44) | Power supply input | Primary 5 V supply for core, peripherals, and I/O; decoupling required near Pin 23 |
| VSS (Pins 1, 22) | Ground reference | 0 V return for digital logic and analog oscillator circuitry; separate ground plane recommended |
| P0.0–P0.7 (Pins 43–36) | Multiplexed address/data bus (AD0–AD7) | Low-order address/data lines during external memory access; quasi-bidirectional I/O otherwise |
| P1.0/A0/WRH (Pin 2) | Address bit 0 / write strobe high | Provides A0 in 8-bit bus mode; functions as WRH (high-byte write strobe) in 16-bit bus mode |
| P1.4/RxD1 (Pin 6) | Serial port 1 receive input | Asynchronous TTL-level input for UART1; supports RS-232 interface with level shifter |
| P1.5/TxD1 (Pin 7) | Serial port 1 transmit output | TTL-level UART1 output; requires external driver for RS-232 compliance |
| P3.0/RxD0 (Pin 11) | Serial port 0 receive input | Dedicated UART0 input; enables simultaneous dual-serial communication (e.g., diagnostics + host interface) |
| P3.1/TxD0 (Pin 13) | Serial port 0 transmit output | Dedicated UART0 output; independent baud rate allows concurrent protocols (e.g., Modbus + debug) |
| RST (Pin 10) | Active-low reset input | Resets CPU, peripherals, and I/O ports to default states; minimum pulse width 2 μs |
| XTAL1/XTAL2 (Pins 21/20) | Crystal oscillator inputs | Supports quartz crystals up to 30 MHz; internal inverter enables Pierce oscillator configuration |
| EA/VPP/WAIT (Pin 35) | External access select / programming voltage / wait input | Latched at reset to enable internal Flash (EA=1) or external code (EA=0); VPP=5 V or 12 V for ISP |
| ALE (Pin 33) | Address latch enable | Strobe signals external latch to capture P0 address bits during multiplexed bus cycles |
| PSEN (Pin 32) | Program store enable | Active-low output enabling external EPROM/Flash during code fetch; not asserted for internal Flash access |
Key Features
| Feature | Design Value |
|---|---|
| In-System Programming (ISP) | Enables field firmware updates via UART using only five pins (TxD, RxD, VSS, VDD, VPP); no socket or programmer required |
| Boot ROM with loader | 2 KB mask-ROM contains verified Flash programming routines and default serial loader - eliminates need for user-written ISP code |
| Programmable I/O output types | Each of 32 I/O pins supports four configurations (quasi-bidirectional, push-pull, open-drain, input-only), enabling direct LED drive or bus termination |
| Flash security lock | Configurable lock bits prevent unauthorized read-out of Flash contents - critical for IP protection in OEM applications |
| Power-down wake-up | External interrupt (INT0/INT1) resumes execution from Power-Down mode in <10 μs - ideal for battery-powered sensor nodes |
| Flash endurance & retention | Rated for ≥10,000 erase/program cycles and ≥10 years data retention across 0°C to +70°C - suitable for industrial lifecycle requirements |
Applications
| Industrial PLC I/O Module | Legacy System Upgrade Controller |
|---|---|
|
Use Scenario: Replacing aging 8051-based modules in programmable logic controllers with expanded memory and dual serial channels. IC Role / Device Role / Timing Role: Main controller executing ladder logic scan, managing discrete I/O expansion via parallel bus, and communicating with HMI over UART0 and SCADA over UART1. Use Value: 64 KB Flash accommodates larger control programs and firmware updates; dual UARTs eliminate need for external UART expanders. |
Use Scenario: Upgrading legacy instrumentation systems originally designed for XA-G3 but requiring doubled memory and enhanced serial throughput. IC Role / Device Role / Timing Role: Drop-in replacement MCU handling sensor data acquisition, local display control, and RS-232/RS-485 protocol bridging. Use Value: Pin-compatible with XA-G3 in PLCC package; identical peripheral register map ensures zero firmware porting effort. |
| Smart Energy Meter Communication Hub | Factory Automation Gateway |
|
Use Scenario: Serving as communication concentrator in polyphase energy meters interfacing with metrology ICs and remote utility networks. IC Role / Device Role / Timing Role: UART0 handles SPI-to-UART conversion for metrology chip, while UART1 manages GPRS/LPWAN modem communication with configurable baud rates. Use Value: Independent UART baud generators allow simultaneous 9600 bps (metrology) and 115.2 kbps (modem) operation without clock scaling. |
Use Scenario: Bridging legacy fieldbus devices (e.g., Profibus DP slaves) to Ethernet-based MES systems in automotive assembly lines. IC Role / Device Role / Timing Role: Real-time protocol translator using Timer 2 for precise bit-banging of fieldbus timing, with UART0 for diagnostics and UART1 for upstream TCP/IP gateway. Use Value: 30 MHz operation ensures deterministic response under 50 μs for time-critical fieldbus cycles; Flash security prevents tampering with protocol stacks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA9306D,512 | 8-bit 80C51 core, 32 KB Flash, single UART, no Boot ROM - lacks ISP capability and dual serial support | Suitable only for cost-sensitive, low-complexity control where field updates are unnecessary | Select only if memory, serial, and programming requirements are strictly lower; not a functional substitute |
| SAK-XC2267-104F80L | 32-bit TriCore CPU, 1 MB Flash, CAN FD, Ethernet MAC - vastly higher performance and integration | Targets next-generation automotive/industrial gateways requiring safety-certified RTOS and multi-protocol support | Choose when migrating to scalable platform with ASIL-B readiness; requires full firmware rewrite |
Compared with PCA9306D,512 and SAK-XC2267-104F80L, PXAG49KBA/00,512 uniquely balances 16-bit deterministic control, dual UART flexibility, and field-programmable Flash in a mature, pin-stable PLCC package - making it optimal for sustaining legacy industrial designs with moderate upgrade paths.
Availability
PXAG49KBA/00,512 is available at Aetrix Electronics and suitable for industrial PLC modules, smart meter communication hubs, factory automation gateways, legacy system upgrades, and embedded control applications requiring stable component supply and long-term manufacturability.
Supply support for PXAG49KBA/00,512 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 (formerly Philips Semiconductors) is a global leader in high-reliability microcontrollers, RF power, and secure connectivity solutions, with deep heritage in industrial and automotive embedded systems.
The XA-G49 belongs to the XA 16-bit microcontroller family, designed specifically for industrial control, instrumentation, and legacy system modernization where 8051 compatibility, field-upgradable Flash, and dual serial interfaces are essential.
FAQ
What is the maximum operating frequency of the PXAG49KBA/00,512?
The PXAG49KBA/00,512 operates at up to 30 MHz when supplied with 5.0 V ±5%. This frequency is validated across the full 0°C to +70°C commercial temperature range and supports instruction cycle times as low as 333 ns for time-critical control loops. The oscillator circuit accepts external crystals or ceramic resonators connected between XTAL1 and XTAL2 pins.
Does the PXAG49KBA/00,512 support In-System Programming (ISP)?
Yes, the PXAG49KBA/00,512 supports ISP via its integrated Boot ROM and dual UARTs. Using only five pins (TxD, RxD, VSS, VDD, and VPP), users can reprogram Flash memory in-circuit without removing the device. The default serial loader accepts Intel Hex records and auto-detects baud rate from an initial 'f' character, eliminating fixed clock dependencies.
How is Flash memory organized in the PXAG49KBA/00,512?
The PXAG49KBA/00,512 contains 64 KB of Flash memory divided into five blocks: two 8 KB blocks (0000h–3FFFh) and three 16 KB blocks (4000h–FFFFh). This structure enables selective erasure - individual blocks can be erased without affecting others - preserving bootloader or calibration data during application updates.
What I/O port configuration options does the PXAG49KBA/00,512 provide?
Each of the four 8-bit ports (P0–P3) on the PXAG49KBA/00,512 supports four programmable output configurations per pin: quasi-bidirectional, push-pull, open-drain, and input-only. Configuration is controlled via dedicated SFRs (PnCFGA/PnCFGB), allowing mixed-mode operation - for example, driving LEDs with push-pull outputs while using open-drain for I²C bus sharing.
Is the PXAG49KBA/00,512 pin-compatible with other XA-family microcontrollers?
Yes, the PXAG49KBA/00,512 is pin-compatible with the XA-G3 in the 44-pin PLCC package (SOT187-2). Peripheral register mapping, reset behavior, and interrupt vectors are identical, enabling direct replacement with no PCB or firmware changes - provided the application fits within the XA-G3's smaller 32 KB Flash and 1 KB RAM limits.
PXAG49KBA/00,512 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-LCC (J-Lead)
- Series:
- XA
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- XA
- Core Size:
- 16-Bit
- Speed:
- 30MHz
- Connectivity:
- UART/USART
- Peripherals:
- PWM, WDT
- Number of I/O:
- 32
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 2K x 8
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- External
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
PXAG49KBA/00,512 FAQ
1.How can I place an order for PXAG49KBA/00,512 through Aetrix?
Please submit a Request for Quotation (RFQ) for PXAG49KBA/00,512 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 PXAG49KBA/00,512 reliable?
The price and inventory of PXAG49KBA/00,512 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PXAG49KBA/00,512 is usually 5 days.
3.What payment methods are accepted for PXAG49KBA/00,512?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PXAG49KBA/00,512 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PXAG49KBA/00,512?
PXAG49KBA/00,512 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PXAG49KBA/00,512 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 PXAG49KBA/00,512?
For technical support, including PXAG49KBA/00,512 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PXAG49KBA/00,512 requirements.
6.How does Aetrix verify that PXAG49KBA/00,512 is sourced from the original manufacturer or authorized distributors?
All PXAG49KBA/00,512 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 PXAG49KBA/00,512 meets industry standards.
7.What is the process for return or replacement of PXAG49KBA/00,512?
All PXAG49KBA/00,512 units undergo pre-shipment inspection (PSI). If there is an issue with PXAG49KBA/00,512, 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 PXAG49KBA/00,512 part is unused and in its original packaging.
Return procedure for PXAG49KBA/00,512:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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