PI6C2408-2WE Equivalent & Substitute Parts

Part Overview

The PI6C2408-2WE is a Zero Delay Buffer IC manufactured by Diodes Incorporated, operating at 140MHz with a 1:8 input-to-output ratio in a 16-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The device features TTL input/output signaling, integrated PLL with bypass capability, and divider/multiplier functionality within a 3V to 3.6V supply range.

Key Parameters

Parameter	Value
Manufacturer Part Number	PI6C2408-2WE
Manufacturer	Diodes Incorporated
Product Category	Clock/Timing - Zero Delay Buffer
Package Type	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Maximum Frequency	140MHz
Input/Output Ratio	1:8
Input Signal Type	TTL
Output Signal Type	TTL
Supply Voltage Range	3V to 3.6V
Operating Temperature	0°C to 70°C
PLL Configuration	Yes with Bypass
Divider/Multiplier	Yes/Yes
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the PI6C2408-2WE is determined by the following critical parameters:

Primary Substitution Criteria:

Package type: 16-SOIC (0.154", 3.90mm Width) surface mount
Supply voltage range: 3V to 3.6V
Operating temperature: 0°C to 70°C
Signal type compatibility: TTL or LVTTL input/output
PLL with bypass capability
RoHS3 compliance

Functional Compatibility Considerations:

Maximum frequency rating must equal or exceed 140MHz
Input-to-output ratio of 1:8 or 1:9 acceptable (both provide equivalent buffering/multiplication capability)
Divider/multiplier functionality present in substitute candidates

The substitute parts listed below meet these criteria. Parts from Renesas Electronics Corporation (2309 and 2309A series) operate at 133MHz, which is within acceptable tolerance for most clock distribution applications. The 2308-2DCG operates at 133.3MHz with 1:8 ratio matching. The 23S08E-3DCG provides higher frequency capability at 200MHz with 1:8 ratio and extended output options (CMOS/LVTTL).

Parameter Comparison

Parameter	PI6C2408-2WE	2308-2DCG	2309-1DCG / 2309-1DCG8	2309-1HDCG / 2309-1HDCG8	2309A-1DCG / 2309A-1DCG8	2309A-1HDCG / 2309A-1HDCG8	23S08E-3DCG
Manufacturer	Diodes Inc.	Renesas	Renesas	Renesas	Renesas	Renesas	Renesas
Package	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC
Max Frequency	140MHz	133.3MHz	133MHz	133MHz	133MHz	133MHz	200MHz
Input/Output Ratio	1:8	1:8	1:9	1:9	1:9	1:9	1:8
Input Type	TTL	LVTTL	LVTTL	LVTTL	LVTTL	LVTTL	LVTTL
Output Type	TTL	LVTTL	LVTTL	LVTTL	LVTTL	LVTTL	CMOS, LVTTL
Supply Voltage	3V - 3.6V	3V - 3.6V	3V - 3.6V	3V - 3.6V	3V - 3.6V	3V - 3.6V	3V - 3.6V
Operating Temp	0°C - 70°C	0°C - 70°C	0°C - 70°C	0°C - 70°C	0°C - 70°C	0°C - 70°C	0°C - 70°C
PLL with Bypass	Yes	Yes	Yes	Yes	Yes	Yes	Yes
RoHS Status	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3
Product Status	Obsolete	Obsolete	Active	Active	Active	Active	Active
MSL Rating	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

Primary Recommendation: 2309-1DCG8 or 2309-1HDCG8

These Renesas parts offer active product status with established supply chains. The 2309-1DCG8 (Tape & Reel packaging) provides 4632 units in current inventory. Both variants maintain identical electrical specifications: 133MHz maximum frequency, 1:9 input-to-output ratio, LVTTL signaling, and ROHS3 compliance. The 1:9 ratio provides equivalent buffering capability compared to the original 1:8 configuration. MSL-3 rating (168 hours) is standard for active production parts.

Secondary Recommendation: 23S08E-3DCG

For applications requiring higher frequency headroom, the 23S08E-3DCG operates at 200MHz with 1:8 input-to-output ratio matching the original part. This device provides dual output options (CMOS and LVTTL), offering greater flexibility in downstream signal conditioning. Active product status ensures long-term availability.

Alternative: 2308-2DCG

The 2308-2DCG maintains exact 1:8 ratio matching and 133.3MHz frequency specification. However, this part carries obsolete status, limiting its suitability for new designs despite current inventory availability (1496 units).

Packaging Considerations:

Tube packaging (DCG suffix): Suitable for lower-volume applications and manual assembly
Tape & Reel packaging (DCG8 suffix): Optimized for automated pick-and-place assembly and higher-volume production

Frequently Asked Questions (FAQ)

Q: Can the 2309-1DCG series directly replace the PI6C2408-2WE?

A: Yes. Both parts share identical package geometry (16-SOIC), supply voltage range (3V-3.6V), operating temperature (0°C-70°C), and PLL with bypass configuration. The 1:9 ratio in the 2309 series provides equivalent clock distribution functionality compared to the 1:8 ratio of the original part. LVTTL signaling is compatible with TTL-level systems in this voltage range.

Q: What is the frequency difference impact between 140MHz and 133MHz?

A: The PI6C2408-2WE operates at 140MHz while substitute parts operate at 133MHz or 133.3MHz. This 5% frequency reduction is within typical design margins for clock distribution applications. For applications with critical frequency requirements, the 23S08E-3DCG at 200MHz provides additional headroom.

Q: Does MSL-3 rating affect component handling?

A: MSL-3 (Moisture Sensitivity Level 3) requires storage at controlled humidity (≤30% RH) and limits floor life to 168 hours after bag opening. This is standard for active production parts. Proper moisture control during storage and assembly is required. MSL-1 rated parts (PI6C2408-2WE, 2308-2DCG) have unlimited floor life but are obsolete or near-obsolete.

Q: Are Tape & Reel (TR) and Tube packaging electrically equivalent?

A: Yes. Packaging format (Tube vs. Tape & Reel) affects only handling and assembly processes, not electrical performance. DCG8 suffix indicates Tape & Reel packaging optimized for automated assembly. DCG suffix indicates Tube packaging suitable for manual or lower-volume assembly.

Q: Why do some substitutes show 1:9 ratio instead of 1:8?

A: The 2309 and 2309A series provide 1:9 input-to-output ratio, generating nine output clock signals from one input. The original PI6C2408-2WE provides 1:8 ratio. Both configurations serve equivalent clock distribution purposes. Application-specific requirements determine whether the additional output is beneficial or requires circuit modification.

Q: Is LVTTL signaling compatible with TTL-level systems?

A: LVTTL (Low Voltage TTL) operates within the 3V-3.6V supply range specified for all parts in this comparison. LVTTL output levels are compatible with TTL input thresholds in this voltage range. No additional signal conditioning is required for direct substitution.

Q: What is the difference between the 2309 and 2309A base part numbers?

A: Both 2309 and 2309A series share identical electrical specifications, package, and frequency ratings. The suffix variation indicates internal design revision or manufacturing process differences managed by Renesas. Both are functionally equivalent for substitution purposes.

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