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PIC12F635T-I/MF Equivalent & Substitute Parts
Part Overview
The PIC12F635T-I/MF is an 8-bit microcontroller from Microchip Technology's PIC® 12F series, featuring 1.75KB FLASH program memory, 64 bytes of RAM, and 128 bytes of EEPROM. This device is designed for embedded applications requiring low-pin-count control with integrated peripherals including brown-out detection, power-on reset, and watchdog timer functionality.
The PIC12F635T-I/MF carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this microcontroller.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Core Processor | PIC |
| Core Size | 8-Bit |
| Speed | 20MHz |
| Program Memory Size | 1.75KB (1K x 14) |
| Program Memory Type | FLASH |
| EEPROM Size | 128 x 8 |
| RAM Size | 64 x 8 |
| Number of I/O | 5 |
| Voltage Supply (Vcc/Vdd) | 2V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
| Package / Case | 8-VDFN Exposed Pad |
| Supplier Device Package | 8-DFN-S (6x5) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the PIC12F635T-I/MF is determined by strict equivalence across the following critical parameters:
- Core Architecture: PIC 8-bit processor
- Memory Configuration: 1.75KB FLASH, 128 bytes EEPROM, 64 bytes RAM
- Operating Frequency: 20MHz maximum
- I/O Count: 5 I/O pins
- Supply Voltage Range: 2V to 5.5V
- Temperature Range: -40°C to 85°C
- Package Type: 8-VDFN Exposed Pad (8-DFN-S 6x5)
- Peripheral Set: Brown-out Detect/Reset, POR, WDT
The substitute part PIC12F635-I/MF meets all these parameters identically. The primary distinction is product status: the main part is Obsolete, while the substitute is Active, ensuring continued availability and support.
Parameter Comparison
| Parameter | PIC12F635T-I/MF (Main) | PIC12F635-I/MF (Substitute) |
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology |
| Series | PIC® 12F | PIC® 12F |
| Core Processor | PIC | PIC |
| Core Size | 8-Bit | 8-Bit |
| Speed | 20MHz | 20MHz |
| Program Memory Size | 1.75KB (1K x 14) | 1.75KB (1K x 14) |
| Program Memory Type | FLASH | FLASH |
| EEPROM Size | 128 x 8 | 128 x 8 |
| RAM Size | 64 x 8 | 64 x 8 |
| Number of I/O | 5 | 5 |
| Voltage - Supply (Vcc/Vdd) | 2V ~ 5.5V | 2V ~ 5.5V |
| Oscillator Type | Internal | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Supplier Device Package | 8-DFN-S (6x5) | 8-DFN-S (6x5) |
| Package / Case | 8-VDFN Exposed Pad | 8-VDFN Exposed Pad |
| Base Product Number | PIC12F635 | PIC12F635 |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) |
| REACH Status | REACH Unaffected | REACH Unaffected |
| ECCN | EAR99 | EAR99 |
| HTSUS | 8542.31.0001 | 8542.31.0001 |
| Product Status | Obsolete | Active |
| Packaging | - | Tube |
Engineering Selection Recommendations
The PIC12F635-I/MF is the direct substitute for the PIC12F635T-I/MF. Both parts share identical electrical specifications, memory configuration, I/O capabilities, and package geometry. The substitute part maintains full ROHS3 compliance and REACH unaffected status, meeting all regulatory requirements of the original device.
The primary advantage of selecting PIC12F635-I/MF is its Active product status, ensuring ongoing manufacturer support, availability through distribution channels, and continued production. The main part's Obsolete status presents supply chain risk and limits access to new inventory.
Both parts are functionally interchangeable at the circuit level. No design modifications are required for substitution. Firmware and software compatibility is maintained due to identical core architecture and instruction set.
Frequently Asked Questions (FAQ)
Q: Are PIC12F635T-I/MF and PIC12F635-I/MF pin-compatible?
A: Yes. Both devices use the 8-VDFN Exposed Pad package with 6x5mm dimensions and identical pin assignments. Direct PCB substitution is possible without layout modifications.
Q: What is the difference between the two part numbers?
A: The primary difference is product status. PIC12F635T-I/MF is Obsolete, while PIC12F635-I/MF is Active. The "T" designation in the main part number indicates a specific manufacturing or distribution variant. Electrical and functional specifications are identical.
Q: Can firmware written for PIC12F635T-I/MF run on PIC12F635-I/MF?
A: Yes. Both devices use the same PIC 8-bit core architecture, instruction set, and memory organization. Firmware is fully compatible without recompilation or modification.
Q: Are there any supply voltage or temperature rating differences?
A: No. Both parts operate across 2V to 5.5V supply range and -40°C to 85°C temperature range. Operating conditions are identical.
Q: What packaging options are available for the substitute part?
A: PIC12F635-I/MF is supplied in Tube packaging. The main part does not specify a packaging format. Both use the same 8-DFN-S (6x5) device package for component mounting.
Q: Are both parts RoHS compliant?
A: Yes. Both PIC12F635T-I/MF and PIC12F635-I/MF are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory standards for electronic components.
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