Equivalent & Substitute Parts for 23S08-2HDCG

Part Overview

The 23S08-2HDCG is a Clock Multiplier with Zero Delay Buffer IC manufactured by Renesas Electronics Corporation. This device operates at a maximum frequency of 133.3MHz and is housed in a 16-SOIC package. The product is classified as obsolete, making identification of functionally equivalent substitute components essential for ongoing system support and new design implementations. Substitute parts must maintain compatibility with the original electrical specifications and physical packaging constraints while offering active product status and extended availability.

Key Parameters

Parameter	23S08-2HDCG
Manufacturer	Renesas Electronics Corporation
Category	Clock/Timing
Type	Clock Multiplier, Zero Delay Buffer
Package / Case	16-SOIC (0.154", 3.90mm Width)
Frequency - Max	133.3MHz
Voltage - Supply	3V ~ 3.6V
Input Type	LVTTL
Output Type	CMOS, LVTTL
Ratio - Input:Output	1:8
PLL	Yes with Bypass
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the 23S08-2HDCG are identified based on the following critical parameters that determine functional equivalence:

Primary Compatibility Criteria:

Package / Case: 16-SOIC (0.154", 3.90mm Width) form factor
Voltage - Supply: 3V ~ 3.6V operating range
Input Type: LVTTL signal compatibility
Output Type: LVTTL or CMOS output capability
PLL with Bypass functionality
RoHS3 Compliance

Substitution Logic: The CDCVF25081D and CDCVF25081DR maintain identical package geometry, supply voltage range, and signal interface specifications as the original part. Both devices feature PLL with Bypass capability and LVTTL input/output compatibility. These Texas Instruments components operate at 200MHz maximum frequency, exceeding the original 133.3MHz specification, and support the same 16-SOIC package footprint. Both substitute parts carry active product status with unlimited MSL rating, providing superior long-term availability compared to the obsolete original.

The 8T49N240-998NLGI represents an alternative from Renesas Electronics Corporation with enhanced capabilities. This Jitter Attenuator IC operates at 867MHz and provides multiple input/output format options including LVCMOS and LVPECL. However, this device utilizes a 40-VFQFN package, requiring PCB layout modifications and is suitable only for applications where package change is acceptable.

Parameter Comparison

Parameter	23S08-2HDCG	CDCVF25081D	CDCVF25081DR	8T49N240-998NLGI
Manufacturer	Renesas	Texas Instruments	Texas Instruments	Renesas
Package / Case	16-SOIC	16-SOIC	16-SOIC	40-VFQFN Exposed Pad
Frequency - Max	133.3MHz	200MHz	200MHz	867MHz
Voltage - Supply	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V	1.71V ~ 3.465V
Input Type	LVTTL	LVTTL	LVTTL	LVCMOS, LVDS, LVHSTL, LVPECL, Crystal
Output Type	CMOS, LVTTL	LVTTL	LVTTL	HCSL, LVCMOS, LVDS, LVPECL
PLL	Yes with Bypass	Yes with Bypass	Yes with Bypass	Yes
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active
MSL Rating	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement (Recommended): The CDCVF25081D and CDCVF25081DR are the primary substitutes for the 23S08-2HDCG. Both devices maintain identical 16-SOIC package geometry, eliminating PCB redesign requirements. The CDCVF25081DR variant offers superior availability with 6351 units in stock and is supplied in Tape & Reel format suitable for automated assembly. Both Texas Instruments parts carry active product status with unlimited MSL ratings, providing extended shelf life and supply chain stability. The 200MHz maximum frequency specification exceeds the original 133.3MHz requirement, ensuring compatibility with existing system timing requirements.

For Applications Requiring Enhanced Capabilities: The 8T49N240-998NLGI provides advanced jitter attenuation and extended frequency range to 867MHz. This Renesas device supports multiple input and output signal formats, offering flexibility for complex timing architectures. Implementation requires PCB layout modifications due to the 40-VFQFN package change. This substitute is appropriate only when system redesign is feasible and enhanced performance characteristics are required.

Compliance Considerations: All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original part's regulatory requirements. The CDCVF25081 series components provide superior long-term compliance support through active product status.

Frequently Asked Questions (FAQ)

Q: Can CDCVF25081D and CDCVF25081DR be used interchangeably with the 23S08-2HDCG? A: Yes, both devices are functionally equivalent for applications requiring LVTTL input/output clock multiplication at frequencies up to 133.3MHz. The identical 16-SOIC package enables direct PCB substitution without layout modifications. The primary difference is packaging format: CDCVF25081D is supplied in tubes, while CDCVF25081DR is supplied in tape and reel format.

Q: What is the key difference between CDCVF25081D and CDCVF25081DR? A: Both parts are electrically identical PLL Clock Driver ICs with 200MHz maximum frequency and 16-SOIC packaging. The distinction is packaging and delivery format. CDCVF25081D uses tube packaging, while CDCVF25081DR uses cut tape and Digi-Reel format. CDCVF25081DR offers higher inventory availability (6351 units) and is optimized for automated assembly processes.

Q: Why is the 8T49N240-998NLGI listed as a substitute if it uses a different package? A: The 8T49N240-998NLGI is included as an alternative for applications where PCB redesign is acceptable. This Jitter Attenuator IC provides enhanced performance with 867MHz maximum frequency and multiple input/output format support. The 40-VFQFN package requires layout modifications but offers superior jitter characteristics for demanding timing applications.

Q: Are all substitute parts RoHS3 compliant? A: Yes, all substitute parts listed (CDCVF25081D, CDCVF25081DR, and 8T49N240-998NLGI) are ROHS3 compliant, matching the original 23S08-2HDCG specification.

Q: What is the MSL rating difference between the original and substitute parts? A: The original 23S08-2HDCG has MSL 3 (168 hours), while CDCVF25081D and CDCVF25081DR have MSL 1 (unlimited). MSL 1 rating provides superior moisture tolerance and extended shelf life without requiring special storage conditions. The 8T49N240-998NLGI maintains MSL 3 rating identical to the original part.

Q: Can the 23S08-2HDCG operate at the full 200MHz frequency of the CDCVF25081 series? A: The 23S08-2HDCG is specified for maximum 133.3MHz operation. The CDCVF25081 series supports frequencies up to 200MHz, providing headroom for applications operating at or below 133.3MHz. The substitute parts are fully compatible with the original part's frequency requirements.

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