ICS2305M-1T Equivalent & Substitute Parts

Part Overview

The ICS2305M-1T is a Fanout Buffer (Distribution) Zero Delay Buffer IC manufactured by Renesas Electronics Corporation. This 8-SOIC surface mount device operates at 133MHz with a 1:5 input-to-output ratio, designed for clock distribution applications requiring minimal propagation delay. The part is classified as Obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Key Parameters

Parameter	ICS2305M-1T
Manufacturer	Renesas Electronics Corporation
Type	Fanout Buffer (Distribution), Zero Delay Buffer
Frequency - Max	133MHz
Ratio - Input:Output	1:5
Voltage - Supply	3V ~ 3.6V
Operating Temperature	0°C ~ 70°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
RoHS Status	RoHS non-compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the ICS2305M-1T are qualified based on the following critical parameters:

Maximum frequency of 133MHz or higher
Input-to-output ratio of 1:5
Supply voltage range of 3V to 3.6V
8-SOIC surface mount package (0.154", 3.90mm Width)
PLL with bypass capability
Single circuit configuration
Zero delay buffer or fanout buffer functionality

Parts are grouped into two categories: Upgrade substitutes (improved compliance and temperature range) and MFR Recommended substitutes (direct functional equivalents with extended availability).

Parameter Comparison

Part Number	Manufacturer	Type	Frequency - Max	Ratio	Voltage - Supply	Operating Temperature	Package	PLL	RoHS Status	Product Status
ICS2305M-1T	Renesas Electronics	Fanout Buffer, Zero Delay Buffer	133MHz	1:5	3V ~ 3.6V	0°C ~ 70°C	8-SOIC	Yes with Bypass	RoHS non-compliant	Obsolete
NB2305AI1HDG	onsemi	Zero Delay Buffer	133MHz	1:5	3V ~ 3.6V	-40°C ~ 85°C	8-SOIC	Yes	ROHS3 Compliant	Obsolete
PI6C2405A-1HWEX	Diodes Incorporated	Zero Delay Buffer	133MHz	1:5	3V ~ 3.6V	0°C ~ 70°C	8-SOIC	Yes	ROHS3 Compliant	Last Time Buy
PI6C2405A-1WE	Diodes Incorporated	Zero Delay Buffer	133MHz	1:5	3V ~ 3.6V	0°C ~ 70°C	8-SOIC	Yes	ROHS3 Compliant	Last Time Buy
PI6C2405A-1WEX	Diodes Incorporated	Zero Delay Buffer	133MHz	1:5	3V ~ 3.6V	0°C ~ 70°C	8-SOIC	Yes	ROHS3 Compliant	Last Time Buy
PL123-05HSC	Microchip Technology	Clock Multiplexer	134MHz	1:5	3V ~ 3.6V	0°C ~ 70°C	8-SOIC	Yes with Bypass	ROHS3 Compliant	Active
PL123-05HSC-R	Microchip Technology	Clock Multiplexer	134MHz	1:5	3V ~ 3.6V	0°C ~ 70°C	8-SOIC	Yes with Bypass	ROHS3 Compliant	Active
PL123-05HSI	Microchip Technology	Clock Multiplexer	134MHz	1:5	3V ~ 3.6V	-40°C ~ 85°C	8-SOIC	Yes with Bypass	ROHS3 Compliant	Active
PL123-05SC	Microchip Technology	Clock Multiplexer	134MHz	1:5	3V ~ 3.6V	0°C ~ 70°C	8-SOIC	Yes with Bypass	ROHS3 Compliant	Active
PL123-05SC-R	Microchip Technology	Clock Multiplexer	134MHz	1:5	3V ~ 3.6V	0°C ~ 70°C	8-SOIC	Yes with Bypass	ROHS3 Compliant	Active
PL123-05SI	Microchip Technology	Clock Multiplexer	134MHz	1:5	3V ~ 3.6V	-40°C ~ 85°C	8-SOIC	Yes with Bypass	ROHS3 Compliant	Active

Engineering Selection Recommendations

Upgrade Path (Improved Compliance): NB2305AI1HDG (onsemi) provides ROHS3 compliance and extended operating temperature range (-40°C to 85°C) while maintaining functional equivalence to the ICS2305M-1T. This part is suitable for applications requiring enhanced environmental specifications.

Direct Functional Equivalents (Active Status): The Microchip Technology PL123 series (PL123-05HSC, PL123-05HSC-R, PL123-05HSI, PL123-05SC, PL123-05SC-R, PL123-05SI) offers Active product status with ROHS3 compliance. These parts operate at 134MHz, exceeding the original 133MHz specification, and maintain identical supply voltage and 1:5 ratio characteristics. Temperature variants are available: standard (0°C to 70°C) and industrial (-40°C to 85°C).

Last Time Buy Options: Diodes Incorporated PI6C2405A series (PI6C2405A-1HWEX, PI6C2405A-1WE, PI6C2405A-1WEX) provides ROHS3 compliance and Last Time Buy status. These parts maintain the original operating temperature range (0°C to 70°C) and are available in multiple packaging configurations (Cut Tape and Tube).

Frequently Asked Questions (FAQ)

Q: Can PL123-05HSC replace ICS2305M-1T directly? A: Yes. Both parts share identical electrical specifications: 133/134MHz operation, 1:5 ratio, 3V to 3.6V supply, 8-SOIC package, and PLL with bypass. The PL123-05HSC operates at 134MHz, which exceeds the original 133MHz specification. Pinout compatibility must be verified for the specific application.

Q: What is the difference between PL123-05SC and PL123-05SC-R? A: Both parts are functionally identical. The difference is packaging: PL123-05SC is supplied in Tube, while PL123-05SC-R is supplied in Cut Tape (CT). Select based on assembly process requirements.

Q: Why should I consider NB2305AI1HDG over the Microchip options? A: NB2305AI1HDG offers extended operating temperature range (-40°C to 85°C) compared to standard variants, making it suitable for industrial or automotive applications. It maintains ROHS3 compliance and functional equivalence.

Q: Are there temperature-rated variants available? A: Yes. Microchip offers industrial temperature variants: PL123-05HSI and PL123-05SI operate from -40°C to 85°C. Standard variants (PL123-05HSC, PL123-05SC) operate from 0°C to 70°C.

Q: What is the significance of the -R suffix in part numbers? A: The -R suffix indicates Tape & Reel (TR) or Cut Tape (CT) packaging for automated assembly. Parts without -R typically indicate Tube packaging for manual handling.

Q: Is RoHS compliance critical for substitution? A: The original ICS2305M-1T is RoHS non-compliant. All substitute parts listed are ROHS3 compliant, meeting current regulatory requirements. This is a significant advantage for new designs and long-term supply chain sustainability.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message