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ATMEGA8L-8PI Equivalent & Substitute Parts
Part Overview
The ATMEGA8L-8PI is an 8-bit AVR microcontroller manufactured by Microchip Technology, featuring 8KB of FLASH program memory, 1KB of RAM, and 512 bytes of EEPROM. This device integrates 23 I/O pins, internal oscillator, and peripheral support for I2C, SPI, and UART/USART communication protocols. The ATMEGA8L-8PI is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 8MHz |
| Program Memory Size | 8KB (4K x 16) |
| Program Memory Type | FLASH |
| RAM Size | 1K x 8 |
| EEPROM Size | 512 x 8 |
| Number of I/O | 23 |
| Voltage Supply (Vcc/Vdd) | 2.7V ~ 5.5V |
| Data Converters | A/D 6x10b |
| Connectivity | I2C, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Through Hole |
| Package / Case | 28-DIP (0.300", 7.62mm) |
Substitute Part Grouping Explanation
Substitution of the ATMEGA8L-8PI is determined by strict equivalence across the following critical parameters:
- Core Architecture: AVR processor family
- Memory Configuration: 8KB FLASH, 1KB RAM, 512 bytes EEPROM
- I/O Count: 23 pins
- Operating Voltage: 2.7V ~ 5.5V range
- Clock Speed: 8MHz
- Package Format: 28-DIP through-hole configuration
- Peripheral Set: I2C, SPI, UART/USART, PWM, WDT, Brown-out Detect/Reset, POR
The ATMEGA8L-8PU meets all substitution criteria. Both devices share identical electrical specifications, memory architecture, and peripheral functionality. The primary distinction is packaging format: the ATMEGA8L-8PI uses individual packaging, while the ATMEGA8L-8PU is supplied in tube packaging.
Parameter Comparison
| Parameter | ATMEGA8L-8PI | ATMEGA8L-8PU | Match |
|---|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology | ✓ |
| Core Processor | AVR | AVR | ✓ |
| Core Size | 8-Bit | 8-Bit | ✓ |
| Speed | 8MHz | 8MHz | ✓ |
| Program Memory Size | 8KB (4K x 16) | 8KB (4K x 16) | ✓ |
| Program Memory Type | FLASH | FLASH | ✓ |
| EEPROM Size | 512 x 8 | 512 x 8 | ✓ |
| RAM Size | 1K x 8 | 1K x 8 | ✓ |
| Number of I/O | 23 | 23 | ✓ |
| Voltage Supply (Vcc/Vdd) | 2.7V ~ 5.5V | 2.7V ~ 5.5V | ✓ |
| Data Converters | A/D 6x10b | A/D 6x10b | ✓ |
| Connectivity | I2C, SPI, UART/USART | I2C, SPI, UART/USART | ✓ |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT | Brown-out Detect/Reset, POR, PWM, WDT | ✓ |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | ✓ |
| Mounting Type | Through Hole | Through Hole | ✓ |
| Package / Case | 28-DIP (0.300", 7.62mm) | 28-DIP (0.300", 7.62mm) | ✓ |
| Product Status | Obsolete | Active | Substitute is Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant | Substitute is Compliant |
Engineering Selection Recommendations
The ATMEGA8L-8PU is a direct functional equivalent to the ATMEGA8L-8PI. Selection of the ATMEGA8L-8PU is supported by the following factors:
- Product Status: The ATMEGA8L-8PU maintains active product status with Microchip Technology, ensuring continued availability and manufacturing support. The ATMEGA8L-8PI is obsolete.
- Regulatory Compliance: The ATMEGA8L-8PU is ROHS3 compliant, meeting current environmental and regulatory requirements. The ATMEGA8L-8PI is RoHS non-compliant.
- Electrical Equivalence: All electrical parameters, memory specifications, and peripheral configurations are identical between both devices.
- Physical Compatibility: Both devices use the 28-DIP through-hole package with identical pin assignments and mechanical dimensions.
- Inventory Availability: The ATMEGA8L-8PU is available in higher quantities (6489 pcs) compared to the ATMEGA8L-8PI (1900 pcs).
Frequently Asked Questions (FAQ)
Q: Are the ATMEGA8L-8PI and ATMEGA8L-8PU pin-compatible?
A: Yes. Both devices use the 28-DIP package with identical pin assignments, voltage levels, and signal definitions. Direct substitution on PCB layouts is possible without modification.
Q: What is the difference between ATMEGA8L-8PI and ATMEGA8L-8PU packaging?
A: The ATMEGA8L-8PI is supplied in individual packaging, while the ATMEGA8L-8PU is supplied in tube packaging. The die and electrical specifications are identical.
Q: Can I use the ATMEGA8L-8PU in applications originally designed for the ATMEGA8L-8PI?
A: Yes. The ATMEGA8L-8PU is electrically and functionally equivalent. All firmware, circuit designs, and operational parameters remain valid.
Q: Why is the ATMEGA8L-8PI listed as obsolete?
A: The ATMEGA8L-8PI has been discontinued by Microchip Technology. The ATMEGA8L-8PU remains in active production and is the recommended replacement.
Q: Does the ATMEGA8L-8PU meet current RoHS requirements?
A: Yes. The ATMEGA8L-8PU is ROHS3 compliant. The ATMEGA8L-8PI is RoHS non-compliant.
Q: Are there any differences in memory specifications between these devices?
A: No. Both devices feature identical memory configurations: 8KB FLASH program memory, 1KB RAM, and 512 bytes EEPROM.
Q: Can I mix ATMEGA8L-8PI and ATMEGA8L-8PU devices in the same production batch?
A: Yes. Both devices are electrically and functionally equivalent and can be used interchangeably in the same circuit design.
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