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ICS2305MI-1HT Equivalent & Substitute Parts
Part Overview
The ICS2305MI-1HT is a fanout buffer (distribution) zero delay buffer IC manufactured by Renesas Electronics Corporation. This 8-SOIC clock/timing component operates at a maximum frequency of 133MHz with a 1:5 input-to-output ratio and supports both CMOS and TTL outputs. The device is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | ICS2305MI-1HT |
| Manufacturer | Renesas Electronics Corporation |
| Category | Clock/Timing |
| Type | Fanout Buffer (Distribution), Zero Delay Buffer |
| Frequency - Max | 133MHz |
| Ratio - Input:Output | 1:5 |
| Voltage - Supply | 3V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| PLL | Yes with Bypass |
| Input | Clock |
| Output | CMOS, TTL |
| Number of Circuits | 1 |
| Product Status | Obsolete |
| RoHS Status | RoHS non-compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the ICS2305MI-1HT are qualified based on the following electrical and mechanical parameters:
Critical Matching Parameters:
- Frequency - Max: 133MHz minimum (substitutes rated 134MHz meet this requirement)
- Ratio - Input:Output: 1:5
- Voltage - Supply: 3V ~ 3.6V
- Package / Case: 8-SOIC (0.154", 3.90mm Width)
- Mounting Type: Surface Mount
- PLL: Yes with Bypass
- Number of Circuits: 1
Acceptable Variations:
- Operating Temperature: Substitutes with -40°C ~ 85°C operating range provide full compatibility; substitutes with 0°C ~ 70°C range represent a narrower specification
- Output Type: Substitutes specify Clock output (functionally compatible with CMOS/TTL outputs of the original)
- RoHS Status: Substitutes are ROHS3 Compliant, representing improved environmental compliance
- Moisture Sensitivity Level: Substitutes rated MSL 3 (168 Hours) or MSL 1 (Unlimited) are acceptable
All substitute parts are manufactured by Microchip Technology and carry the base product number PL123 with various suffix designations indicating packaging and temperature range options.
Parameter Comparison
| Parameter | ICS2305MI-1HT | PL123-05HSC | PL123-05HSC-R | PL123-05HSI | PL123-05SC | PL123-05SC-R | PL123-05SI | PL123-05SI-R | PL123S-05SC | PL123S-05SC-R |
|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Renesas | Microchip | Microchip | Microchip | Microchip | Microchip | Microchip | Microchip | Microchip | Microchip |
| Frequency - Max | 133MHz | 134MHz | 134MHz | 134MHz | 134MHz | 134MHz | 134MHz | 134MHz | 134MHz | 134MHz |
| Ratio - Input:Output | 1:5 | 1:5 | 1:5 | 1:5 | 1:5 | 1:5 | 1:5 | 1:5 | 1:5 | 1:5 |
| Voltage - Supply | 3V ~ 3.6V | 3V ~ 3.6V | 3V ~ 3.6V | 3V ~ 3.6V | 3V ~ 3.6V | 3V ~ 3.6V | 3V ~ 3.6V | 3V ~ 3.6V | 3V ~ 3.6V | 3V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C | 0°C ~ 70°C | 0°C ~ 70°C | -40°C ~ 85°C | 0°C ~ 70°C | 0°C ~ 70°C | -40°C ~ 85°C | -40°C ~ 85°C | 0°C ~ 70°C | 0°C ~ 70°C |
| Package / Case | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| PLL | Yes with Bypass | Yes with Bypass | Yes with Bypass | Yes with Bypass | Yes with Bypass | Yes with Bypass | Yes with Bypass | Yes with Bypass | Yes with Bypass | Yes with Bypass |
| Number of Circuits | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) | 3 (168 Hours) | 3 (168 Hours) | 3 (168 Hours) | 1 (Unlimited) | 1 (Unlimited) | 3 (168 Hours) | 3 (168 Hours) | 1 (Unlimited) | 1 (Unlimited) |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active | Discontinued at DiGi Electronics | Discontinued at DiGi Electronics |
| Packaging | - | Tube | Tape & Reel (TR) | Tube | Tube | Cut Tape (CT) | Tube | Tape & Reel (TR) | Tube | Tape & Reel (TR) |
Engineering Selection Recommendations
For Extended Temperature Range Applications (-40°C ~ 85°C): Select PL123-05HSI, PL123-05SI, or PL123-05SI-R. These parts maintain the full operating temperature range of the original ICS2305MI-1HT. PL123-05HSI is available in tube packaging with 1,122 units in stock. PL123-05SI-R offers tape & reel packaging with 5,400 units in stock, suitable for automated assembly processes.
For Standard Temperature Range Applications (0°C ~ 70°C): PL123-05HSC, PL123-05HSC-R, PL123-05SC, PL123-05SC-R, PL123S-05SC, and PL123S-05SC-R are qualified substitutes. These parts provide active product status with ROHS3 compliance. PL123-05SC-R offers the highest inventory availability at 6,792 units in cut tape packaging.
For Moisture-Sensitive Environments: PL123-05SC, PL123-05SC-R, PL123S-05SC, and PL123S-05SC-R carry MSL 1 (Unlimited) rating, matching the original part's moisture sensitivity specification. These are preferred for applications with extended storage or high-humidity conditions.
For RoHS Compliance Requirements: All Microchip substitute parts are ROHS3 Compliant, providing environmental compliance improvement over the original RoHS non-compliant ICS2305MI-1HT.
Frequently Asked Questions (FAQ)
Q: Can PL123-05HSC (0°C ~ 70°C) replace ICS2305MI-1HT (-40°C ~ 85°C) in all applications?
A: PL123-05HSC is electrically and mechanically compatible but operates within a narrower temperature range. Use this substitute only if your application operates within 0°C ~ 70°C. For applications requiring -40°C ~ 85°C operation, select PL123-05HSI, PL123-05SI, or PL123-05SI-R.
Q: What is the difference between PL123-05SC and PL123-05SC-R?
A: Both parts are electrically identical with 134MHz maximum frequency and 1:5 ratio. The primary difference is packaging: PL123-05SC is supplied in tube packaging, while PL123-05SC-R is supplied in cut tape. PL123-05SC-R has higher inventory availability (6,792 units vs. 1,275 units).
Q: Are tape & reel packaged parts (PL123-05HSC-R, PL123-05SI-R, PL123S-05SC-R) suitable for manual assembly?
A: Tape & reel packaging is optimized for automated pick-and-place assembly. For manual assembly, tube packaging options (PL123-05HSC, PL123-05SI, PL123S-05SC) are more convenient.
Q: Does the 134MHz maximum frequency of substitute parts exceed the 133MHz specification of ICS2305MI-1HT?
A: Yes. The 134MHz rating of Microchip PL123 parts exceeds the 133MHz specification of the original part. This represents improved performance capability and is acceptable for direct substitution.
Q: What is the significance of MSL 3 (168 Hours) versus MSL 1 (Unlimited)?
A: MSL 3 parts require reflow soldering within 168 hours of package opening. MSL 1 parts have unlimited shelf life after opening. For applications with extended storage or infrequent assembly, MSL 1 rated parts (PL123-05SC, PL123-05SC-R, PL123S-05SC, PL123S-05SC-R) are preferred.
Q: Why are PL123S-05SC and PL123S-05SC-R marked as "Discontinued at DiGi Electronics"?
A: These parts are discontinued at the DiGi Electronics distributor but remain available through inventory. For new designs, select from active product status parts: PL123-05HSC, PL123-05HSC-R, PL123-05HSI, PL123-05SC, PL123-05SC-R, PL123-05SI, or PL123-05SI-R.
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