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NXP Semiconductors PXAG49KBBD/00,557

Name: PXAG49KBBD/00,557
Brand: NXP Semiconductors
SKU: PXAG49KBBD/00,557
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PXAG49KBBD/00,557

Manufacturer:: NXP Semiconductors

Category:: Microcontrollers

Package:: 44-LQFP

Datasheet:: PXAG49KBBD/00,557.pdf

Description:: IC MCU 16BIT 64KB FLASH 44LQFP

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Product details

Overview

PXAG49KBBD/00,557 from NXP Semiconductors (formerly Philips Semiconductors) is a 16-bit XA extended-architecture microcontroller with 64 KB Flash program memory, 2 KB on-chip RAM, dual UARTs, three timers/counters, and a watchdog timer. It operates at up to 30 MHz at 5 V and targets embedded control applications requiring in-system programmability and external memory expansion.

For engineers reviewing the PXAG49KBBD/00,557 datasheet, PXAG49KBBD/00,557 pinout, PXAG49KBBD/00,557 application, or PXAG49KBBD/00,557 equivalent, this device supports In-Application Programming (IAP) via Boot ROM routines, offers four configurable 8-bit I/O ports, and delivers dual independent baud-rate UARTs for industrial serial communication subsystems.

Technical Context

The PXAG49KBBD/00,557 implements the 80C51 XA (eXtended Architecture) core with 20-bit external address bus support (up to 1 MB program/data space), enabling flexible off-chip memory interfacing. Its memory map includes five Flash blocks (two 8 KB + three 16 KB), a 2 KB Boot ROM overlaying F800h–FFFFh, and 2 KB static RAM mapped at 0000h–07FFh.

It integrates three enhanced timers (T0, T1, T2), where T2 provides capture/reload and direction control via T2EX, and two UARTs with separate baud rate generators. 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 architecture with 20-bit addressing capability
Flash Memory	64 KB organized as five blocks (2×8 KB + 3×16 KB); supports byte-wise programming and block erasure
RAM	2048 bytes on-chip static RAM; directly and indirectly addressable with bit-addressable region
Timers/Counters	Three 16-bit timers (T0, T1, T2); T2 supports capture, reload, and toggle output
Serial Interfaces	Dual UARTs (UART0 and UART1) with independent baud rate generators and full-duplex operation
Operating Frequency	30 MHz maximum at 5 V supply; compatible with crystal or external clock input at XTAL1/XTAL2
I/O Ports	Four 8-bit ports (P0–P3); each pin supports programmable output configuration (quasi-bidirectional, push-pull, open-drain, input-only)
Package	44-pin LQFP (SOT389-1); lead-free per RoHS requirements (as documented in Philips 2001 preliminary data)

Pinout & Package

Package: 44-pin Plastic Low Profile Quad Flat Package (LQFP), SOT389-1, body size 10 mm × 10 mm, 0.8 mm pitch.

Pin/Terminal	Circuit Role	Design Meaning
P0.0–P0.7 (pins 37–30)	Multiplexed address/data bus (AD0–AD7) / quasi-bidirectional I/O	Provides low-order address/data during external memory access; defaults to quasi-bidirectional mode on reset
P1.0–P1.7 (pins 40–44, 1–3)	General-purpose I/O with alternate functions	P1.0 = A0/WRH (address bit 0 or write strobe high); P1.4 = RxD1; P1.5 = TxD1; P1.6 = T2; P1.7 = T2EX
P2.0–P2.7 (pins 18–25)	High-order address bus (A12–A19) / quasi-bidirectional I/O	Supplies upper address bits in 16-bit external bus mode; configurable for 8-bit bus width via BUSW pin (P3.5)
P3.0–P3.7 (pins 5, 7–13)	Multiplexed peripheral I/O	P3.0/RxD0, P3.1/TxD0, P3.2/INT0, P3.3/INT1, P3.4/T0, P3.5/T1/BUSW, P3.6/WRL, P3.7/RD
XTAL1 (pin 15), XTAL2 (pin 14)	Crystal oscillator inputs	XTAL1 accepts external clock or crystal input; XTAL2 outputs buffered clock signal for external feedback
RST (pin 4)	Active-low reset input	Resets CPU, peripherals, and I/O ports; initiates execution from reset vector (0000h unless Boot Vector active)
EA/VPP/WAIT (pin 29)	External Access select / programming voltage / wait input	Latched at reset to enable internal Flash (EA=1) or external code (EA=0); serves as VPP during ISP when configured for 5 V or 12 V programming

Key Features

Feature	Design Value
In-System Programming (ISP)	Single-supply (5 V) ISP via UART using factory default loader in Boot ROM; no external programmer required
In-Application Programming (IAP)	Boot ROM provides callable low-level Flash erase/program/verify routines accessible from user firmware
Configurable I/O Port Output Types	Each of 32 I/O pins supports four output configurations (quasi-bidirectional, push-pull, open-drain, input-only) via dedicated SFR registers
Flash Security & Flexibility	Programmable security lock bits; Boot Vector allows custom loader placement; Status Byte controls reset vector selection
Power Management	Idle and Power-Down modes; FMIDLE bit disables Flash during Idle to reduce current from ~8 mA to ~1 mA
External Bus Interface	Supports 8-bit or 16-bit external data bus width (selected by BUSW pin); up to 1 MB total address space with 20 address lines

Applications

Industrial Serial Gateway	Legacy Equipment Controller
Use Scenario: Integrating Modbus RTU field devices into a central SCADA system via RS-485 interface. IC Role / Device Role / Timing Role: Primary controller managing dual UARTs-one for master polling, one for diagnostics-while executing protocol stack and buffering data in 2 KB RAM. Use Value: Dual independent baud-rate UARTs eliminate need for external UART bridges; 64 KB Flash accommodates full Modbus implementation plus firmware updates.	Use Scenario: Replacing obsolete 8051-based motion controllers in CNC retrofit kits with extended memory and ISP capability. IC Role / Device Role / Timing Role: Real-time motion sequencer using Timer 2 for precise pulse-width modulation and external interrupts (INT0/INT1) for limit switch inputs. Use Value: 30 MHz operation enables sub-millisecond loop timing; Flash block erase allows safe field updates without removing the board.
Smart Sensor Node	Secure Bootloader Platform
Use Scenario: Battery-powered environmental sensor node aggregating analog inputs and transmitting via UART-to-LoRaWAN bridge. IC Role / Device Role / Timing Role: Low-power coordinator managing ADC sampling intervals via Timer 0, UART transmission via UART1, and wake-up from Power-Down on external interrupt. Use Value: FMIDLE reduces standby current by ~7 mA; 2 KB RAM supports local data buffering before transmission bursts.	Use Scenario: Secure firmware update mechanism for medical device subsystems requiring authenticated code loading. IC Role / Device Role / Timing Role: Trusted boot controller verifying signature in Boot ROM before jumping to signed application image in Flash. Use Value: Boot Vector and Status Byte enable secure reset vector redirection; programmable security bits prevent unauthorized Flash readback.

Industrial Serial Gateway

Legacy Equipment Controller

Use Scenario: Integrating Modbus RTU field devices into a central SCADA system via RS-485 interface.

IC Role / Device Role / Timing Role: Primary controller managing dual UARTs-one for master polling, one for diagnostics-while executing protocol stack and buffering data in 2 KB RAM.

Use Value: Dual independent baud-rate UARTs eliminate need for external UART bridges; 64 KB Flash accommodates full Modbus implementation plus firmware updates.

Use Scenario: Replacing obsolete 8051-based motion controllers in CNC retrofit kits with extended memory and ISP capability.

IC Role / Device Role / Timing Role: Real-time motion sequencer using Timer 2 for precise pulse-width modulation and external interrupts (INT0/INT1) for limit switch inputs.

Use Value: 30 MHz operation enables sub-millisecond loop timing; Flash block erase allows safe field updates without removing the board.

Smart Sensor Node

Secure Bootloader Platform

Use Scenario: Battery-powered environmental sensor node aggregating analog inputs and transmitting via UART-to-LoRaWAN bridge.

IC Role / Device Role / Timing Role: Low-power coordinator managing ADC sampling intervals via Timer 0, UART transmission via UART1, and wake-up from Power-Down on external interrupt.

Use Value: FMIDLE reduces standby current by ~7 mA; 2 KB RAM supports local data buffering before transmission bursts.

Use Scenario: Secure firmware update mechanism for medical device subsystems requiring authenticated code loading.

IC Role / Device Role / Timing Role: Trusted boot controller verifying signature in Boot ROM before jumping to signed application image in Flash.

Use Value: Boot Vector and Status Byte enable secure reset vector redirection; programmable security bits prevent unauthorized Flash readback.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
PCA9306/01,557	Same XA-G49 silicon, 44-pin PLCC package (SOT187-2), identical Flash/RAM/timers/UARTs	Requires different PCB footprint and socket; thermal performance differs due to PLCC vs. LQFP thermal resistance	Select when legacy PLCC sockets or through-hole assembly are required; not pin-compatible with PXAG49KBBD/00,557
XA-G3 (e.g., PXAG3KBA/00,557)	Same architecture but only 32 KB Flash and 1 KB RAM; otherwise identical peripherals and pinout	Suitable for cost-sensitive designs with smaller firmware footprints; lacks capacity for complex protocol stacks or dual firmware images	Choose when memory budget is constrained and 32 KB Flash suffices; shares same LQFP pinout but reduced memory limits feature scalability

Compared with PCA9306/01,557 and XA-G3, the PXAG49KBBD/00,557 provides double the Flash and RAM of the XA-G3 while offering superior thermal dissipation and surface-mount compatibility versus the PLCC variant-making it optimal for new industrial designs requiring field-upgradable firmware and compact layout.

Availability

PXAG49KBBD/00,557 is available at Aetrix Electronics and suitable for industrial serial gateways, legacy equipment controllers, smart sensor nodes, and secure bootloader platforms requiring stable component supply and long-term lifecycle support.

Supply support for PXAG49KBBD/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 (originally Philips Semiconductors) is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT markets.

The XA-G49 belongs to the XA 16-bit microcontroller family, designed specifically for embedded control applications demanding extended memory addressing, robust in-system programmability, and industrial-grade reliability in harsh environments.

FAQ

What is the maximum operating frequency of the PXAG49KBBD/00,557?

The PXAG49KBBD/00,557 operates at up to 30 MHz when supplied with 5 V ±5%. This frequency is supported across the full commercial temperature range (0 °C to +70 °C), as specified in the Philips 2001 preliminary data sheet. The device uses an internal clock generator driven by an external crystal or clock source connected between XTAL1 and XTAL2.

Does the PXAG49KBBD/00,557 support In-Application Programming (IAP)?

Yes, the PXAG49KBBD/00,557 supports In-Application Programming via low-level routines stored in its 2 KB Boot ROM. These routines-accessible through documented entry points-enable user firmware to erase Flash blocks, program individual bytes, verify contents, and manage security bits without halting main application execution.

How many UART interfaces does the PXAG49KBBD/00,557 include, and are their baud rates independent?

The PXAG49KBBD/00,557 includes two fully independent UARTs (UART0 and UART1), each with its own baud rate generator. This allows simultaneous communication at different speeds-for example, UART0 at 9600 bps for debugging and UART1 at 115200 bps for high-speed sensor data streaming-without shared timing constraints.

What package type is used for the PXAG49KBBD/00,557, and what is its pin count?

The PXAG49KBBD/00,557 uses a 44-pin Plastic Low Profile Quad Flat Package (LQFP) with SOT389-1 mechanical outline. It features 0.8 mm pitch, 10 mm × 10 mm body size, and is RoHS-compliant per Philips' 2001 preliminary documentation.

Can the PXAG49KBBD/00,557 execute code from external memory, and what is the maximum addressable space?

Yes, the PXAG49KBBD/00,557 supports external program and data memory addressing up to 1 megabyte (20 address lines). When EA is latched low at reset, the device executes exclusively from external memory; when EA is high, it uses internal Flash up to 64 KB and accesses external memory beyond that address range.

PXAG49KBBD/00,557 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Package/Case:: 44-LQFP

Series:: XA

Packaging:: Bag

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:

PXAG49KBBD/00,557 FAQ

1.How can I place an order for PXAG49KBBD/00,557 through Aetrix?

Please submit a Request for Quotation (RFQ) for PXAG49KBBD/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 PXAG49KBBD/00,557 reliable?

The price and inventory of PXAG49KBBD/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 PXAG49KBBD/00,557 is usually 5 days.

3.What payment methods are accepted for PXAG49KBBD/00,557?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PXAG49KBBD/00,557 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PXAG49KBBD/00,557?

PXAG49KBBD/00,557 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PXAG49KBBD/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 PXAG49KBBD/00,557?

For technical support, including PXAG49KBBD/00,557 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PXAG49KBBD/00,557 requirements.

6.How does Aetrix verify that PXAG49KBBD/00,557 is sourced from the original manufacturer or authorized distributors?

All PXAG49KBBD/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 PXAG49KBBD/00,557 meets industry standards.

7.What is the process for return or replacement of PXAG49KBBD/00,557?

All PXAG49KBBD/00,557 units undergo pre-shipment inspection (PSI). If there is an issue with PXAG49KBBD/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 PXAG49KBBD/00,557 part is unused and in its original packaging.

Return procedure for PXAG49KBBD/00,557:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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