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AT89LP2052-20XU
Microchip Technology
IC MCU 8BIT 2KB FLASH 20TSSOP
1610 Pcs New Original In Stock
8051 89LP Microcontroller IC 8-Bit 20MHz 2KB (2K x 8) FLASH 20-TSSOP
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5.0 / 5.0
- (419 Ratings)
AT89LP2052-20XU
Product Overview
1262806
DiGi Electronics Part Number
AT89LP2052-20XU-DGManufacturer
Microchip Technology
AT89LP2052-20XU
Description
IC MCU 8BIT 2KB FLASH 20TSSOPInventory
1610 Pcs New Original In Stock
8051 89LP Microcontroller IC 8-Bit 20MHz 2KB (2K x 8) FLASH 20-TSSOP
Quantity
Minimum 1
Minimum 1
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AT89LP2052-20XU Technical Specifications
Category
Embedded, Microcontrollers
Packaging
Tube
Series
89LP
Product Status
Active
DiGi-Electronics Programmable
Not Verified
Core Processor
8051
Core Size
8-Bit
Speed
20MHz
Connectivity
SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O
15
Program Memory Size
2KB (2K x 8)
Program Memory Type
FLASH
EEPROM Size
-
RAM Size
256 x 8
Voltage - Supply (Vcc/Vdd)
2.4V ~ 5.5V
Data Converters
-
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C (TA)
Mounting Type
Surface Mount
Supplier Device Package
20-TSSOP
Package / Case
20-TSSOP (0.173", 4.40mm Width)
Base Product Number
AT89LP2052
Datasheet & Documents
HTML Datasheet
AT89LP2052-20XU-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.31.0001
Additional Information
Other Names
1611-AT89LP2052-20XU
AT89LP205220XU
Standard Package
74
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
Le support client est accessible facilement par chat en ligne et leur réponse est toujours rapide et précise.
de desembre 02, 2025
アフターセールスの対応が素晴らしく、購入後の質問にも丁寧に答えてもらえました。
de desembre 02, 2025
Their extensive product selection ensures I find exactly what I’m looking for every time.
de desembre 02, 2025
The consistency in product reliability means I seldom have to worry about replacements or repairs.
de desembre 02, 2025
Incredible delivery speed paired with top-quality packaging safety features.
de desembre 02, 2025
Excellent shipping speed, with a package that was securely sealed and well protected.
de desembre 02, 2025
I value their straightforward pricing—no surprises, just fair and honest costs.
de desembre 02, 2025
Their product consistency supports my long-term project planning.
de desembre 02, 2025
Every purchase I’ve made has been worth it thanks to their exemplary quality standards.
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Frequently Asked Questions (FAQ)
Can the AT89LP2052-20XU safely replace an AT89C2051 in an existing 5V design, and what are the key differences affecting compatibility?
Yes, the AT89LP2052-20XU can generally replace the AT89C2051 in a 5V system, but engineers must account for critical differences. The AT89LP2052-20XU features an internal oscillator versus the AT89C2051’s external crystal requirement, which simplifies board layout but may affect timing precision. Additionally, the LP version offers lower power consumption and operates down to 2.4V, enabling future migration to lower-voltage operation. However, firmware timing loops optimized for the older part may need adjustment due to clock source differences. Verify reset circuit compatibility and ensure the 20-TSSOP footprint matches your PCB—pinout is largely compatible, but confirm I/O mappings and peripheral enable sequences in code.
How does the internal oscillator accuracy of the AT89LP2052-20XU impact UART communication at 20MHz, and what can be done to minimize error rates?
The internal oscillator of the AT89LP2052-20XU has a typical accuracy of ±1% over temperature and voltage, which can introduce UART bit timing errors—especially at higher baud rates like 115200 bps. At 20MHz, this may exceed acceptable error margins (±3–5%), risking data corruption in strict communication environments. To mitigate this, choose standard baud rates where the prescaler accommodates the clock tolerance, or use firmware-calibrated timer values. For mission-critical links, consider enabling the UART’s 8x oversampling mode if supported, or evaluate external clocking if available. Testing across voltage (2.4V–5.5V) and temperature (-40°C to 85°C) ranges is advised.
What design considerations should be taken when using the AT89LP2052-20XU in a battery-powered system to maximize low-power performance?
To optimize power in battery-driven applications with the AT89LP2052-20XU, leverage its low-voltage operation (down to 2.4V) and internal oscillator efficiency. Use Idle and Power-down sleep modes with the integrated WDT to wake periodically for sensing or comms. Disable unused peripherals (e.g., UART, SPI) in software to reduce leakage. Since the device lacks a dedicated low-power timer, manage wake-up events via external interrupts or WDT intervals. Avoid holding I/O lines in high-impedance or intermediate states—configure unused pins as outputs or tie them low—to prevent shoot-through current. Profile current draw at your target voltage, especially in active mode under real firmware load.
Is the 15-pin I/O limitation of the AT89LP2052-20XU a risk in interfacing with multiple peripherals like SPI sensors and PWM loads, and how can I/O be extended efficiently?
The AT89LP2052-20XU provides 15 I/O lines, which can be tight when driving SPI peripherals, PWM outputs, and general controls simultaneously. A major risk is I/O contention in complex sensor or actuator systems. To expand I/O efficiently, use SPI-driven port expanders (e.g., MCP23S17) or I²C-compatible shift registers (though I²C requires bit-banging on this MCU). Reserve specific pins for critical functions—use P3.0 and P3.1 for UART if needed, and dedicate P1.4–P1.6 for SPI. Consider time-multiplexing non-critical signals or using decoders (e.g., 3-to-8 decoder for chip selects). Ensure external pull-ups are used only where necessary to avoid unnecessary current draw.
What are the reliability risks of using the AT89LP2052-20XU in an industrial environment with wide temperature swings, and how does its flash endurance affect firmware update frequency?
The AT89LP2052-20XU is rated for -40°C to 85°C, making it suitable for many industrial applications, but thermal cycling can affect long-term reliability, especially with poor PCB layout. Ensure adequate copper pads and ground planes for thermal stability. The device specifies 10,000 Flash write cycles—this limits how often firmware updates can be performed in the field. Frequent reprogramming risks premature memory wear, especially if sectors are rewritten in loops. Mitigate by minimizing unnecessary Flash writes, using RAM for dynamic data, and implementing wear-leveling logic if storing calibration or logging data in program memory. Also, validate brown-out reset (BOR) settings to prevent partial writes during power fluctuations.
Quality Assurance (QC)
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AT89LP2052-20XU CAD Models
Microchip Technology AT89LP2052-20XU PCB symbols & footprints
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