CDCM1804RGER Equivalent & Substitute Parts

Part Overview

The CDCM1804RGER is an active Clock/Timing IC functioning as a fanout buffer (distribution), divider, and multiplexer. This Texas Instruments component operates at frequencies up to 800 MHz with a 1:4 input-to-output ratio and supports multiple input and output signal standards. The device is classified as Active product status with full RoHS3 compliance and REACH unaffected designation. Alternative models may be required due to inventory constraints, application-specific output requirements, or design flexibility needs within compatible parameter ranges.

Substiute Parts

CDCM1804RGER

Texas InstrumentsIn Stock: 2481CDCM1804RGER Datasheet

Current PartRFQ

CDCM1804RGET

Texas InstrumentsIn Stock: 1189CDCM1804RGET Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDCM1804RGER is determined by the following critical parameters:

• Manufacturer: Texas Instruments (same family required)
• Base Product Number: CDCM1804 (core device platform)
• Package / Case: 24-VFQFN Exposed Pad (mechanical and thermal compatibility)
• Frequency - Max: 800 MHz (performance ceiling)
• Voltage - Supply: 3V ~ 3.6V (power supply compatibility)
• Operating Temperature: -40°C ~ 85°C (thermal operating range)
• Input/Output Signal Standards: CML, HSTL, LVDS, LVPECL, LVTTL, SSTL-2, VML (input); LVCMOS, LVPECL (output)
• Differential Input/Output: Yes/Yes (signal integrity requirements)
• Product Status: Active (ongoing support and availability)

The CDCM1804RGET qualifies as a parametric equivalent substitute. While the input-to-output ratio differs (1:3 versus 1:4), all other critical electrical, thermal, and mechanical parameters remain identical, allowing functional substitution in applications where the reduced output count is acceptable.

Parameter Comparison

Engineering Selection Recommendations

The CDCM1804RGET serves as a direct parametric equivalent to the CDCM1804RGER for applications requiring clock distribution and fanout buffering within the specified electrical and thermal envelope. Both devices maintain Active product status, ensuring continued manufacturer support and supply chain availability. Both components satisfy RoHS3 compliance and REACH unaffected requirements, making them suitable for regulated applications.

Selection between these two variants depends solely on output channel requirements. The CDCM1804RGER provides four output channels (1:4 ratio), while the CDCM1804RGET provides three output channels (1:3 ratio). PCB layout, signal routing, and system architecture must accommodate the chosen output configuration. No performance degradation occurs when substituting the CDCM1804RGET in designs requiring three or fewer output channels; however, the CDCM1804RGER remains the appropriate choice for applications requiring all four output channels.

Frequently Asked Questions (FAQ)

Q: Can the CDCM1804RGET replace the CDCM1804RGER in all applications?

A: The CDCM1804RGET is electrically and thermally compatible with the CDCM1804RGER. Substitution is valid only when the application requires three or fewer output channels. Applications requiring four simultaneous output channels must use the CDCM1804RGER.

Q: Are the package dimensions and pinouts identical between these devices?

A: Both devices use the 24-VFQFN Exposed Pad package with 4x4 mm dimensions. Pinout differences exist due to the different output channel counts. Consult the respective device datasheets for detailed pinout specifications before PCB layout.

Q: Do both devices support the same input and output signal standards?

A: Yes. Both the CDCM1804RGER and CDCM1804RGET accept identical input standards (CML, HSTL, LVDS, LVPECL, LVTTL, SSTL-2, VML) and produce identical output standards (LVCMOS, LVPECL). Signal integrity and impedance matching requirements remain consistent across both variants.

Q: What is the maximum operating frequency for both devices?

A: Both devices operate at frequencies up to 800 MHz. No frequency derating occurs between the two variants.

Q: Are there any supply voltage or thermal operating range differences?

A: No. Both devices require 3V to 3.6V supply voltage and operate across the -40°C to 85°C temperature range. Thermal management and power supply design considerations are identical.

Q: Do both devices have the same moisture sensitivity level?

A: Yes. Both devices carry MSL rating 2 with a 1-year floor life. Identical moisture control and storage procedures apply to both variants.

Q: Are both devices RoHS3 compliant?

A: Yes. Both the CDCM1804RGER and CDCM1804RGET are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for restricted substance use.