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PIC16C55T-RCE/SS Equivalent & Substitute Parts
Part Overview
The PIC16C55T-RCE/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, designed for embedded applications requiring OTP (One-Time Programmable) memory. This device operates at 4MHz with 768B of program memory and 24 x 8 bytes of RAM, housed in a 28-SSOP surface mount package. The product is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support, maintenance, and new design implementations where legacy compatibility is required.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Technology |
| Core Processor | PIC |
| Core Size | 8-Bit |
| Speed | 4MHz |
| Program Memory Size | 768B (512 x 12) |
| Program Memory Type | OTP |
| RAM Size | 24 x 8 |
| Number of I/O | 20 |
| Peripherals | POR, WDT |
| Voltage Supply Range | 3.25V ~ 6V |
| Operating Temperature | -40°C ~ 125°C (TA) |
| Mounting Type | Surface Mount |
| Package | 28-SSOP (0.209", 5.30mm Width) |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the PIC16C55T-RCE/SS is determined by strict alignment of the following critical parameters:
Core Compatibility Requirements:
- Identical core processor architecture (PIC)
- Matching core size (8-Bit)
- Identical operating speed (4MHz)
- Matching program memory capacity (768B / 512 x 12)
- Identical program memory type (OTP)
- Matching RAM configuration (24 x 8)
- Identical I/O count (20 pins)
- Matching peripheral set (POR, WDT)
Physical & Environmental Requirements:
- Identical package type and dimensions (28-SSOP)
- Compatible voltage supply range (must encompass or match the original range)
- Compatible operating temperature range
- Identical mounting type (Surface Mount)
Compliance Requirements:
- RoHS3 compliance maintained
- MSL rating compatibility
The substitute part PIC16C55-RCI/SS meets all core compatibility requirements while maintaining full electrical and mechanical equivalence.
Parameter Comparison
| Parameter | PIC16C55T-RCE/SS (Main) | PIC16C55-RCI/SS (Substitute) |
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology |
| Series | PIC® 16C | PIC® 16C |
| Core Processor | PIC | PIC |
| Core Size | 8-Bit | 8-Bit |
| Speed | 4MHz | 4MHz |
| Program Memory Size | 768B (512 x 12) | 768B (512 x 12) |
| Program Memory Type | OTP | OTP |
| RAM Size | 24 x 8 | 24 x 8 |
| Number of I/O | 20 | 20 |
| Peripherals | POR, WDT | POR, WDT |
| Voltage Supply (Vcc/Vdd) | 3.25V ~ 6V | 3V ~ 6.25V |
| Operating Temperature | -40°C ~ 125°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 28-SSOP (0.209", 5.30mm Width) | 28-SSOP (0.209", 5.30mm Width) |
| Product Status | Obsolete | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
The PIC16C55-RCI/SS is a direct functional equivalent to the PIC16C55T-RCE/SS. Both devices share identical core architecture, memory configuration, I/O capabilities, and peripheral functionality. The substitute part carries Active product status, ensuring continued availability and manufacturing support compared to the Obsolete status of the main part.
Voltage supply range compatibility is maintained within typical operating margins. The substitute part accepts a lower minimum voltage (3V vs. 3.25V) and higher maximum voltage (6.25V vs. 6V), providing broader supply flexibility. The operating temperature range of the substitute part (-40°C ~ 85°C) is narrower than the main part (-40°C ~ 125°C); applications requiring operation above 85°C must retain the original part number.
Both parts maintain ROHS3 compliance and identical MSL ratings, supporting equivalent handling and storage requirements. The 28-SSOP package dimensions are identical, ensuring direct PCB compatibility without layout modifications.
Frequently Asked Questions (FAQ)
Q: Can PIC16C55-RCI/SS be used as a direct replacement for PIC16C55T-RCE/SS?
A: Yes, for applications operating within -40°C to 85°C and 3V to 6.25V supply range. The devices are functionally identical in core architecture, memory, I/O, and peripherals. Applications requiring operation above 85°C must use the original part.
Q: What is the primary difference between these two parts?
A: The main part is Obsolete; the substitute is Active. The substitute has a slightly narrower maximum operating temperature (85°C vs. 125°C) and broader voltage supply range. All functional and electrical parameters are equivalent.
Q: Are the packages identical?
A: Yes. Both use 28-SSOP packaging with identical dimensions (0.209", 5.30mm Width). No PCB layout changes are required for substitution.
Q: Does the substitute part require different handling or storage?
A: No. Both parts have identical MSL ratings of 1 (Unlimited), requiring the same moisture sensitivity precautions and storage conditions.
Q: Why is the substitute part listed as Active while the main part is Obsolete?
A: The PIC16C55-RCI/SS remains in active production by Microchip Technology, ensuring continued availability for new designs and system maintenance. The PIC16C55T-RCE/SS has been discontinued.
Q: Are there compliance or certification differences?
A: No. Both parts maintain ROHS3 compliance and identical regulatory certifications (REACH Unaffected, ECCN 3A991A2, HTSUS 8542.31.0001).
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