Equivalent & Substitute Parts for CDCU877RHARG4

Part Overview

The Texas Instruments CDCU877RHARG4 is a clock/timing IC designed as a DDR2 memory clock buffer/driver with integrated PLL and multiplexer functionality. It is provided in a 40-VQFN (6x6) package with a maximum frequency of 400MHz and operates at a supply voltage range of 1.7V to 1.9V. This model supports differential SSTL-18 input and output signals, serving a 1:10 input-to-output ratio. The CDCU877RHARG4 is discontinued at Digi-Key, which necessitates the identification of alternative part numbers for ongoing or new designs requiring compatible function, electrical, and mechanical characteristics.

Substiute Parts

CDCU877RHARG4

Texas InstrumentsIn Stock: 1114CDCU877RHARG4 Datasheet

Current PartRFQ

CDCU877RHAR

Texas InstrumentsIn Stock: 2716CDCU877RHAR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution is valid for clock/timing ICs in the DDR2 buffer/driver category when the following key parameters are identical between the main and substitute parts: part function (memory, DDR2 clock buffer/driver and multiplexer), electrical interface (SSTL-18 input/output), number of circuits, input/output ratio, frequency, supply voltage range, operating temperature, mounting type, package mechanical outline (40-VQFN 6x6), RoHS/REACH compliance, moisture sensitivity, and regulatory compliance identifiers.

Parameter Comparison

Engineering Selection Recommendations

The CDCU877RHARG4 is discontinued at Digi-Key, while the substitute CDCU877RHAR is listed as active and available in inventory. Both parts are ROHS3 compliant, unaffected by REACH, and have MSL 3 (168 hours) ratings. They share identical electrical, mechanical, and regulatory characteristics as provided.

Frequently Asked Questions (FAQ)

Q1: On what basis is CDCU877RHAR considered an equivalent substitute for CDCU877RHARG4?
A1: CDCU877RHAR matches every essential electrical, mechanical, regulatory, and compliance parameter specified for CDCU877RHARG4.

Q2: Are there differences in package, mounting, or supply voltage?
A2: Both devices use the 40-VQFN (6x6) package, support surface mount installation, and operate within a 1.7V to 1.9V supply range.

Q3: Is any difference expected in compliance or storage requirements?
A3: Both parts are ROHS3 compliant, REACH unaffected, and have identical moisture sensitivity (MSL 3, 168 hours).

Q4: Are performance characteristics such as input/output standards, output ratio, and frequency the same?
A4: Both parts support SSTL-18 input/output, a 1:10 input-to-output ratio, differential operation, and a maximum frequency of 400MHz.

Q5: Does Digi-Electronics Programmable status affect substitutability?
A5: This field is "Not Verified" for both devices, and does not affect equivalence under the provided criteria.