CDC208NSRG4 Equivalent & Substitute Parts

Part Overview

The CDC208NSRG4 is a Clock Fanout Buffer (Distribution) IC manufactured by Texas Instruments, designed for 1:4 clock distribution applications with a maximum frequency of 60 MHz. This device features TTL input and CMOS output, operating across a supply voltage range of 4.5V to 5.5V and temperature range of -40°C to 85°C. The part is packaged in a 20-SOIC (0.209", 5.30mm Width) surface mount configuration.

The CDC208NSRG4 is currently discontinued at DiGi Electronics. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Base Product Number	CDC208
Type	Fanout Buffer (Distribution)
Number of Circuits	2
Ratio - Input:Output	1:4
Input Type	TTL
Output Type	CMOS
Frequency - Max	60 MHz
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package / Case	20-SOIC (0.209", 5.30mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the CDC208NSRG4 is determined by strict equivalence across the following critical parameters:

Base product number (CDC208)
Functional type (Fanout Buffer with 1:4 distribution)
Input/Output signal types (TTL input, CMOS output)
Maximum frequency (60 MHz)
Supply voltage range (4.5V ~ 5.5V)
Operating temperature range (-40°C ~ 85°C)
Package type (20-SOIC surface mount)
Electrical and mechanical compatibility

The CDC208NSR qualifies as a parametric equivalent substitute. Both parts share identical electrical specifications, functional characteristics, and physical packaging. The primary difference is packaging format: CDC208NSRG4 is supplied in tube packaging, while CDC208NSR is supplied in Tape & Reel (TR) format.

Parameter Comparison

Parameter	CDC208NSRG4	CDC208NSR	Match
Manufacturer	Texas Instruments	Texas Instruments	✓
Base Product Number	CDC208	CDC208	✓
Type	Fanout Buffer (Distribution)	Fanout Buffer (Distribution)	✓
Number of Circuits	2	2	✓
Ratio - Input:Output	1:4	1:4	✓
Input Type	TTL	TTL	✓
Output Type	CMOS	CMOS	✓
Frequency - Max	60 MHz	60 MHz	✓
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	✓
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	✓
Package / Case	20-SOIC (0.209", 5.30mm Width)	20-SOIC (0.209", 5.30mm Width)	✓
Mounting Type	Surface Mount	Surface Mount	✓
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	✓
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	✓
Product Status	Discontinued at DiGi Electronics	Active	Different
Packaging Format	Tube	Tape & Reel (TR)	Different

Engineering Selection Recommendations

The CDC208NSR is a direct parametric equivalent to the CDC208NSRG4. All electrical specifications, functional characteristics, and physical dimensions are identical. Both parts are ROHS3 compliant and carry identical regulatory certifications (REACH Unaffected, ECCN EAR99, HTSUS 8542.39.0001).

The CDC208NSR holds active product status, ensuring ongoing availability and supply chain continuity. The CDC208NSRG4 is discontinued, making the CDC208NSR the appropriate selection for new designs and component replenishment.

The only distinction between these parts is packaging format. The CDC208NSR is supplied in Tape & Reel (TR) format, which is standard for automated assembly processes. If tube packaging is specifically required for manual assembly or other application-specific reasons, alternative sourcing channels should be evaluated.

Frequently Asked Questions (FAQ)

Q: Can CDC208NSR be used as a direct replacement for CDC208NSRG4?

A: Yes. Both parts are electrically and mechanically identical. They share the same base product number (CDC208), functional specifications, supply voltage range (4.5V ~ 5.5V), maximum frequency (60 MHz), operating temperature range (-40°C ~ 85°C), and 20-SOIC package configuration. The parts are interchangeable at the circuit level.

Q: What is the difference between CDC208NSRG4 and CDC208NSR?

A: The parts are functionally equivalent. The primary difference is packaging format: CDC208NSRG4 is supplied in tube packaging, while CDC208NSR is supplied in Tape & Reel (TR) format. Tape & Reel packaging is optimized for automated pick-and-place assembly, while tube packaging is used for manual handling and lower-volume applications.

Q: Are there any compliance or certification differences?

A: No. Both parts carry identical compliance certifications: ROHS3 Compliant, REACH Unaffected, Moisture Sensitivity Level 1 (Unlimited), ECCN EAR99, and HTSUS 8542.39.0001.

Q: Why is CDC208NSRG4 discontinued?

A: The CDC208NSRG4 is discontinued at DiGi Electronics. The CDC208NSR remains in active production status, ensuring continued availability and supply chain support.

Q: Will CDC208NSR work in existing PCB designs using CDC208NSRG4?

A: Yes. The 20-SOIC package footprint is identical. No PCB layout modifications are required. The parts are pin-compatible and functionally equivalent.

Q: What is the maximum frequency specification for these parts?

A: Both CDC208NSRG4 and CDC208NSR support a maximum frequency of 60 MHz for clock distribution applications.

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