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NXP Semiconductors PXAS37KBA,512
- Part No.:
- PXAS37KBA,512
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
PXAS37KBA,512.pdf
- Description:
- IC MCU 16BIT 32KB OTP 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,681
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Product details
Overview
PXAS37KBA,512 from NXP Semiconductors is a 16-bit OTP-based microcontroller with 32 KB on-chip program memory, 1 KB RAM, 8-channel 8-bit A/D converter (4.46 µs conversion at 30 MHz), I²C interface, dual UARTs, and 24-bit external addressing up to 16 MB - used in industrial sensor nodes requiring low-voltage operation (2.7–5.5 V) and deterministic real-time control.
For engineers reviewing the PXAS37KBA,512 datasheet, PXAS37KBA,512 pinout, PXAS37KBA,512 application, or PXAS37KBA,512 equivalent, key selection considerations include its 68-pin PLCC package, OTP programmability, 30 MHz max clock, dual UART baud rate independence, and A/D auto-scan capability for multi-sensor acquisition.
Technical Context
The PXAS37KBA,512 implements the XA CPU core with extended 16-bit architecture, supporting both internal code execution (via EA=1) and external bus expansion with 24 address lines. Its memory map includes dedicated 32 KB ROM/OTP and 1 KB SRAM, with segmented data addressing via SFRs like DS, ES, and SSEL.
Peripherals are tightly integrated: the 5-channel PCA supports capture/compare and PWM; dual UARTs feature independent baud rate generators; the I²C module operates as master or slave with status register (I2STAT) and interrupt-driven transfers; and the A/D subsystem uses ADCON/ADCS registers to configure channel scan, 8- or 10-bit mode, and interrupt-on-completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit XA CPU with 80C51-compatible instruction set and extended addressing |
| Memory | 32 KB on-chip OTP program memory + 1 KB SRAM; supports 16 MB external address space |
| A/D Converter | 8-channel 8-bit (or 10-bit) SAR ADC; 4.46 µs conversion time at 30 MHz; auto-scan mode enabled |
| Communication | Dual UARTs with independent baud rate generators; I²C-bus master/slave interface |
| Timers & PCA | Three standard timers/counters + 5-channel 16-bit Programmable Counter Array (PCA) |
| Operating Voltage | 2.7 V to 5.5 V supply range; supports commercial temperature grade (0°C to +70°C) |
| Package | 68-pin Plastic Leaded Chip Carrier (PLCC), SOT188-2 drawing |
Pinout & Package
Package: 68-pin PLCC (SOT188-2), leaded, surface-mount compatible with standard PLCC sockets and reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (pins 2, 21, 54) | Power supply input | Primary digital power rail (2.7–5.5 V); multiple pins reduce IR drop and improve noise immunity |
| VSS (pins 1, 20, 55) | Ground reference | Digital ground return; distributed pins minimize ground bounce across high-speed I/O |
| RST (pin 50) | Reset input | Active-low synchronous reset; initiates hardware initialization and vector fetch from 0000h |
| RSTOUT (pin 19) | Reset status output | Drives low during any reset event (external, watchdog, RESET instruction); enables system-level fault logging |
| P5.0–P5.7 (pins 17–20, 22–25) | Analog input / I²C I/O | 8-channel A/D inputs (AD0–AD7); AD6/SCL and AD7/SDA share pins with I²C bus |
| P3.0/P3.1 (pins 3/4) | UART0 I/O | RxD0/TxD0 - full-duplex serial interface with programmable baud rate and framing control |
| P1.4/P1.5 (pins 36/37) | UART1 I/O | RxD1/TxD1 - second independent UART, enabling simultaneous host/debug and peripheral communication |
| XTAL1/XTAL2 (pins 68/67) | Crystal oscillator interface | Connects to external crystal (up to 30 MHz) or ceramic resonator; drives internal clock generator |
Key Features
| Feature | Design Value |
|---|---|
| OTP Program Memory | 32 KB one-time programmable ROM enables secure firmware deployment without external memory |
| Dual Independent UARTs | Separate baud rate generators allow concurrent communication with different peripherals at distinct speeds |
| Auto-Scan A/D Conversion | Hardware-accelerated sequential sampling across up to 8 channels reduces CPU overhead in sensor aggregation |
| 5-Channel PCA | Supports precise PWM generation, input capture, and software-timed event counting without timer resource contention |
| Reset Source Register (RSTSRC) | Identifies last reset cause (external, watchdog, or software) in firmware for diagnostic and recovery logic |
Applications
| Industrial Sensor Node | Smart Metering Interface |
|---|---|
Use Scenario: Multi-sensor environmental monitoring (temperature, humidity, pressure) with local signal conditioning and wireless upload. IC Role / Device Role / Timing Role: Central controller managing analog acquisition, UART-based modem communication, and I²C-connected peripherals. Use Value: Integrated 8-channel A/D and dual UARTs eliminate external ADC and level-shifter ICs, reducing BOM count and PCB area. | Use Scenario: Electricity/water meter with pulse counting, tamper detection, and RS-485 backhaul communication. IC Role / Device Role / Timing Role: Real-time pulse capture via PCA channels and isolated UART transmission using independent baud rates. Use Value: PCA's CEX0–CEX4 inputs enable simultaneous edge-triggered counting on five utility inputs without CPU polling. |
| Legacy Industrial PLC Module | Low-Power HMI Controller |
Use Scenario: Retrofitting legacy 8051-based control modules with enhanced memory and peripheral density. IC Role / Device Role / Timing Role: Drop-in architectural upgrade supporting same pin-compatible footprint and instruction compatibility. Use Value: 32 KB OTP replaces external EPROM, while 1 KB RAM doubles data buffer capacity for ladder logic execution. | Use Scenario: Touch-button panel with LED indicators, local display refresh, and battery-backed operation. IC Role / Device Role / Timing Role: Low-power coordinator entering Idle/Power-down modes between user interactions. Use Value: Wake-up from Power-down via external interrupt (e.g., button press) ensures sub-µA standby current and instant responsiveness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA9555D,118 | I²C I/O expander (no CPU, no A/D, no UARTs); 16-bit GPIO only | Used for peripheral expansion only - cannot replace main controller function | Select only when augmenting I/O on an existing host MCU, not as standalone replacement |
| MC9S12XDP512MAL | 16-bit HCS12X core; 512 KB Flash, 32 KB RAM; CAN interface; no built-in A/D auto-scan | Automotive-grade with CAN support; higher memory but larger 112-pin LQFP package | Choose for CAN-enabled systems requiring field-upgradable Flash; not pin-compatible or OTP-based |
Compared with PCA9555D,118 and MC9S12XDP512MAL, the PXAS37KBA,512 uniquely combines OTP security, integrated A/D auto-scan, dual UART independence, and 68-pin PLCC packaging - making it optimal for cost-sensitive, fixed-function industrial controllers where firmware immutability and analog integration are critical.
Availability
PXAS37KBA,512 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart metering interfaces, and legacy PLC retrofit projects requiring stable component supply, long-term manufacturability, and commercial-temperature-grade reliability.
Supply support for PXAS37KBA,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 is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications.
The PXAS37KBA,512 belongs to the XA-S3 family - designed specifically for high-performance embedded control in resource-constrained industrial environments requiring deterministic timing, analog integration, and robust bus interfacing.
FAQ
What is the maximum operating frequency of the PXAS37KBA,512?
The PXAS37KBA,512 operates at up to 30 MHz across its full 2.7 V–5.5 V supply range. This frequency is supported by the internal clock generator when driven by an external crystal or ceramic resonator connected to XTAL1/XTAL2. The device maintains timing compliance and A/D accuracy specifications at this speed, as verified in the 2013 product specification.
Does the PXAS37KBA,512 support 10-bit A/D conversion?
Yes, the PXAS37KBA,512 supports 10-bit A/D conversion via the ADRES bit in the ADCON register. When enabled, the upper 8 bits are stored in ADRSHn registers and the two LSBs in ADRSL. Conversion time increases versus 8-bit mode, and ADCFG must be configured accordingly per the datasheet timing tables.
How many I/O pins does the PXAS37KBA,512 provide?
The PXAS37KBA,512 provides 50 configurable I/O pins across Ports 0–6. Port 0 (8 pins), Port 1 (8), Port 2 (8), Port 3 (8), Port 4 (8), Port 5 (8), and Port 6 (2) - all support four programmable output configurations including quasi-bidirectional, push-pull, open-drain, and input-only modes.
Is the PXAS37KBA,512 pin-compatible with other XA-S3 variants?
Yes, the PXAS37KBA,512 shares identical pinout and electrical characteristics with other 68-pin PLCC XA-S3 OTP variants (e.g., PXAS30KBA, PXAS33KBA) per SOT188-2. Differences are limited to factory-programmed OTP content and minor timing binning - no PCB redesign is required when migrating between these speed-binned parts.
What debug or programming interface does the PXAS37KBA,512 support?
The PXAS37KBA,512 does not include on-chip debug circuitry or JTAG/SWD interfaces. Programming is performed via parallel OTP programming equipment using the VPP pin (shared with EA/WAIT) and standard address/data bus signals. Debugging relies on UART-based printf-style tracing or external logic analyzers monitoring port activity.
PXAS37KBA,512 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 68-LCC (J-Lead)
- Series:
- XA
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- XA
- Core Size:
- 16-Bit
- Speed:
- 30MHz
- Connectivity:
- EBI/EMI, I2C, UART/USART
- Peripherals:
- PWM, WDT
- Number of I/O:
- 50
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- OTP
- EEPROM Size:
- -
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 8x8b
- Oscillator Type:
- External
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
PXAS37KBA,512 FAQ
1.How can I place an order for PXAS37KBA,512 through Aetrix?
Please submit a Request for Quotation (RFQ) for PXAS37KBA,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 PXAS37KBA,512 reliable?
The price and inventory of PXAS37KBA,512 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PXAS37KBA,512 is usually 5 days.
3.What payment methods are accepted for PXAS37KBA,512?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PXAS37KBA,512 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PXAS37KBA,512?
PXAS37KBA,512 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PXAS37KBA,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 PXAS37KBA,512?
For technical support, including PXAS37KBA,512 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PXAS37KBA,512 requirements.
6.How does Aetrix verify that PXAS37KBA,512 is sourced from the original manufacturer or authorized distributors?
All PXAS37KBA,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 PXAS37KBA,512 meets industry standards.
7.What is the process for return or replacement of PXAS37KBA,512?
All PXAS37KBA,512 units undergo pre-shipment inspection (PSI). If there is an issue with PXAS37KBA,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 PXAS37KBA,512 part is unused and in its original packaging.
Return procedure for PXAS37KBA,512:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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