Equivalent & Substitute Parts for 23S08T-1DCG

Part Overview

The 23S08T-1DCG is a Clock Multiplier, Zero Delay Buffer IC manufactured by Renesas Electronics Corporation. This device operates at a maximum frequency of 133.3MHz with a 1:8 input-to-output ratio and is packaged in a 16-SOIC form factor. The product is currently obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Manufacturer Part Number	23S08T-1DCG
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
Ratio - Input:Output	1:8
Voltage - Supply	2.3V ~ 2.7V
Input Type	LVTTL
Output Type	CMOS, LVTTL
PLL	Yes with Bypass
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitute components for the 23S08T-1DCG are identified based on the following critical parameters that determine functional compatibility:

Package Compatibility: Both substitute parts maintain the 16-SOIC (0.154", 3.90mm Width) surface mount package, ensuring mechanical and electrical interface compatibility with existing PCB layouts.

Functional Classification: The substitute parts are PLL Clock Driver ICs that provide equivalent clock multiplication and buffering functionality through integrated phase-locked loop architecture with bypass capability.

Signal Interface: Input and output signal types (LVTTL) are maintained across substitute parts, ensuring compatibility with existing digital logic interfaces.

Pinout Compatibility: All parts share the same 16-pin SOIC package configuration, allowing direct socket replacement without PCB redesign.

The substitute parts operate at higher maximum frequencies (200MHz versus 133.3MHz) and support extended temperature ranges (-40°C to 85°C versus 0°C to 70°C), providing enhanced performance margins for system applications.

Parameter Comparison

Parameter	23S08T-1DCG (Main)	CDCVF25081D	CDCVF25081DR
Manufacturer	Renesas Electronics	Texas Instruments	Texas Instruments
Package / Case	16-SOIC (0.154", 3.90mm)	16-SOIC (0.154", 3.90mm)	16-SOIC (0.154", 3.90mm)
Type	Clock Multiplier, Zero Delay Buffer	PLL Clock Driver	PLL Clock Driver
Frequency - Max	133.3MHz	200MHz	200MHz
Ratio - Input:Output	1:8	2:8	2:8
Voltage - Supply	2.3V ~ 2.7V	3V ~ 3.6V	3V ~ 3.6V
Input Type	LVTTL	LVTTL	LVTTL
Output Type	CMOS, LVTTL	LVTTL	LVTTL
PLL	Yes with Bypass	Yes with Bypass	Yes with Bypass
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active
Moisture Sensitivity Level (MSL)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

CDCVF25081D and CDCVF25081DR are active, production-supported alternatives to the obsolete 23S08T-1DCG. Both parts are manufactured by Texas Instruments and maintain full compliance with ROHS3 standards, providing long-term supply chain stability and regulatory alignment.

The primary distinction between CDCVF25081D and CDCVF25081DR is packaging format: CDCVF25081D is supplied in tube packaging, while CDCVF25081DR is supplied in tape and reel format. The tape and reel variant (CDCVF25081DR) is recommended for high-volume production environments due to improved handling efficiency and reduced component damage risk during automated assembly.

Both substitute parts feature improved moisture sensitivity characteristics (MSL 1 versus MSL 3), reducing risk during storage and handling. Extended operating temperature range (-40°C to 85°C) provides enhanced reliability across broader environmental conditions compared to the original part specification (0°C to 70°C).

Frequently Asked Questions (FAQ)

Q: Can CDCVF25081D or CDCVF25081DR be used as direct replacements for 23S08T-1DCG?

A: Yes. Both parts share the identical 16-SOIC package footprint and pinout configuration. LVTTL input and output signal compatibility ensures seamless integration with existing circuit designs. The higher maximum frequency rating (200MHz) and extended temperature range provide enhanced performance margins.

Q: What is the difference between CDCVF25081D and CDCVF25081DR?

A: Both parts are electrically and functionally identical. The difference is packaging format: CDCVF25081D is supplied in tube packaging for manual or small-batch assembly, while CDCVF25081DR is supplied in tape and reel format optimized for automated pick-and-place assembly processes.

Q: Are there supply voltage compatibility concerns when substituting?

A: The substitute parts operate at 3V to 3.6V supply voltage, compared to the original part's 2.3V to 2.7V specification. System power supply design must accommodate this higher voltage requirement. Verify that existing power distribution networks can reliably deliver 3V to 3.6V to the component.

Q: Does the input-to-output ratio change affect system operation?

A: The substitute parts specify a 2:8 ratio compared to the original 1:8 ratio. This indicates different internal clock division architecture. System timing requirements must be re-evaluated to confirm compatibility with the substitute part's frequency multiplication characteristics.

Q: What are the moisture sensitivity implications?

A: The substitute parts carry MSL 1 rating (unlimited floor life) compared to the original MSL 3 rating (168-hour floor life). This represents improved moisture resistance and reduced risk during storage and handling. No additional moisture control measures are required beyond standard ESD precautions.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both CDCVF25081D and CDCVF25081DR are ROHS3 compliant, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

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