PCM1794DBR Equivalent & Substitute Parts

Part Overview

The PCM1794DBR is a 24-bit audio digital-to-analog converter (DAC) manufactured by Texas Instruments, designed for high-resolution audio applications requiring I2S interface compatibility. This component operates across dual supply voltages (3V–3.6V and 5V) and supports a 200 kHz sampling rate with three independent channels.

The PCM1794DBR is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support long-term product availability for legacy systems and new designs requiring compatible audio DAC functionality.

Substiute Parts

PCM1794DBR

Texas InstrumentsIn Stock: 949PCM1794DBR Datasheet

Current PartRFQ

PCM1794ADBR

Texas InstrumentsIn Stock: 21085PCM1794ADBR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PCM1794DBR is determined by strict equivalence across the following critical parameters:

• Audio DAC Architecture: Type must be DAC, Audio
• Channel Configuration: 3 independent channels required
• Resolution: 24-bit resolution mandatory
• Sampling Rate: 200 kHz per second
• Digital Interface: I2S protocol compliance
• Supply Voltage Compatibility: Dual supply operation (3V–3.6V and 5V)
• Operating Temperature Range: -25°C to 85°C
• Package Specification: 28-SSOP form factor with 0.209" width (5.30mm)
• Regulatory Compliance: ROHS3 Compliant, REACH Unaffected

The PCM1794ADBR meets all substitution criteria and is classified as a direct equivalent.

Parameter Comparison

Engineering Selection Recommendations

The PCM1794ADBR is a direct functional equivalent to the PCM1794DBR. Both components share identical electrical specifications, package geometry, and regulatory compliance certifications. The primary distinction is product status: the PCM1794DBR is obsolete, while the PCM1794ADBR maintains active production status.

For new designs and legacy system support requiring 24-bit, 3-channel audio DAC functionality with I2S interface and dual supply voltage operation, the PCM1794ADBR is the appropriate selection. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment across manufacturing and deployment environments.

Frequently Asked Questions (FAQ)

Q: Can the PCM1794ADBR replace the PCM1794DBR in existing designs?

A: Yes. The PCM1794ADBR is electrically and mechanically equivalent. All electrical parameters, pin configurations, package dimensions, and operating ranges are identical. Direct substitution is supported without circuit modification.

Q: Are there differences in I2S protocol implementation between these parts?

A: No. Both components implement identical I2S digital audio interface specifications. Data format, timing, and protocol compliance are equivalent.

Q: What is the significance of the product status difference?

A: The PCM1794DBR is obsolete and no longer manufactured. The PCM1794ADBR is in active production. For supply chain continuity and long-term availability, the PCM1794ADBR is the recommended selection.

Q: Are the 28-SSOP packages physically interchangeable?

A: Yes. Both components use the 28-SSOP package with identical 0.209" width (5.30mm). PCB footprints, solder pad layouts, and mounting procedures are identical.

Q: Do both parts support the same supply voltage range?

A: Yes. Both the PCM1794DBR and PCM1794ADBR operate across 3V–3.6V and 5V supply rails with identical performance characteristics.

Q: Are there any compliance or certification differences?

A: No. Both components maintain ROHS3 compliance and REACH unaffected status. Moisture sensitivity level (MSL 1) and regulatory classifications are identical.