CS47048B-CQZR Equivalent & Substitute Parts

Part Overview

The CS47048B-CQZR is a 32-bit fixed-point audio system-on-chip (SoC) manufactured by Cirrus Logic Inc., designed for embedded audio processing applications. This device integrates a 150MHz processor with 128kB on-chip RAM and dual communication interfaces (I2C and SPI), operating at 3.30V I/O and 1.80V core voltage levels.

The CS47048B-CQZR carries an Obsolete product status, indicating it is no longer in active production. Identifying equivalent substitute parts is essential for ongoing system maintenance, legacy design support, and procurement continuity when original inventory becomes unavailable.

Substiute Parts

CS47048B-CQZR

Cirrus Logic Inc.In Stock: 1083CS47048B-CQZR Datasheet

Current PartRFQ

CS47048C-CQZ

Cirrus Logic Inc.In Stock: 4758CS47048C-CQZ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CS47048B-CQZR is determined by strict alignment across the following critical parameters:

• Base product number (CS47048 series)
• Processor type and architecture (Fixed Point, 32-bit)
• Clock frequency (150MHz)
• Memory configuration (128kB on-chip RAM)
• Communication interfaces (I2C and SPI support)
• Voltage specifications (3.30V I/O, 1.80V core)
• Operating temperature range (0°C ~ 70°C)
• Package form factor (100-LQFP with exposed pad)
• Mounting technology (Surface Mount)

The CS47048C-CQZ qualifies as a direct substitute based on matching all core functional and electrical parameters. Differences in product status, packaging format, and moisture sensitivity classification do not affect electrical or mechanical compatibility in equivalent applications.

Parameter Comparison

Engineering Selection Recommendations

The CS47048C-CQZ is electrically and mechanically equivalent to the CS47048B-CQZR across all functional parameters. Both devices share identical processor architecture, clock frequency, memory capacity, interface protocols, and voltage specifications.

Selection between these parts should be based on:

• Product status considerations: The CS47048B-CQZR is Obsolete, while the CS47048C-CQZ is classified as Not For New Designs. For legacy system maintenance and repair, either part is suitable. For new production designs, neither part is recommended due to their discontinued status.
• Regulatory compliance: The CS47048C-CQZ carries explicit ROHS3 Compliant certification, providing documented environmental compliance for applications requiring regulatory documentation.
• Moisture handling: The CS47048C-CQZ specifies MSL 3 (168 hours), requiring more stringent moisture control during storage and assembly compared to the CS47048B-CQZR (MSL 2, 1 year). This affects handling procedures but not functional performance.
• Inventory availability: The CS47048C-CQZ shows higher current stock levels (4684 pcs) compared to the CS47048B-CQZR (1048 pcs), affecting procurement lead times.

Frequently Asked Questions (FAQ)

Q: Can the CS47048C-CQZ directly replace the CS47048B-CQZR in existing designs?

A: Yes. Both parts are functionally equivalent across all electrical and mechanical parameters. No circuit modifications or firmware changes are required for substitution.

Q: What is the difference between the two part numbers?

A: The primary differences are product status, RoHS certification documentation, and moisture sensitivity classification. The "B" and "C" designations indicate different manufacturing revisions within the CS47048 product line, but core functionality remains identical.

Q: Are there any pin compatibility concerns?

A: No. Both parts use the 100-LQFP Exposed Pad package with identical pinout and electrical characteristics. PCB layout and footprint remain unchanged.

Q: Why does the CS47048C-CQZ have a higher MSL rating?

A: MSL 3 (168 hours) versus MSL 2 (1 year) reflects different moisture absorption characteristics of the component materials. This affects storage and assembly handling procedures but does not impact electrical performance or long-term reliability in the final application.

Q: Which part should be selected for new production?

A: Neither part is recommended for new designs due to their discontinued status. Both are classified as Obsolete or Not For New Designs. Consult Cirrus Logic for current-generation audio SoC alternatives.

Q: Is the CS47048C-CQZ ROHS compliant?

A: Yes, the CS47048C-CQZ is ROHS3 Compliant. The CS47048B-CQZR does not specify RoHS status in available documentation.