PCM1798DBG4 Equivalent & Substitute Parts

Part Overview

The PCM1798DBG4 is a 24-bit audio digital-to-analog converter (DAC) manufactured by Texas Instruments, designed for high-resolution audio applications. It features dual channels, a 200 kHz sampling rate, and PCM data interface compatibility. The device operates across dual voltage supplies (3V–3.6V and 5V) and is housed in a 28-pin SSOP surface-mount package.

The PCM1798DBG4 is currently discontinued at DiGi Electronics. Locating equivalent or substitute components is necessary to maintain design continuity and ensure project timelines are met. Substitute parts must maintain identical electrical specifications and mechanical compatibility to ensure drop-in replacement capability.

Substiute Parts

PCM1798DBG4

Texas InstrumentsIn Stock: 705PCM1798DBG4 Datasheet

Current PartRFQ

PCM1798DB

Texas InstrumentsIn Stock: 1592PCM1798DB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCM1798DBG4 is based on strict equivalence across all critical electrical and mechanical parameters. The substitute part must satisfy the following criteria:

• Identical resolution: 24 bits
• Identical sampling rate: 200 kHz
• Identical data interface: PCM
• Identical channel count: 2 channels
• Identical voltage supply requirements: 3V–3.6V and 5V
• Identical operating temperature range: −25°C to +85°C
• Identical package type: 28-SSOP with 0.209" (5.30mm) width
• Identical mounting type: Surface Mount
• Compliance with ROHS3 and REACH requirements

The PCM1798DB meets all substitution criteria and is classified as a manufacturer-recommended equivalent. The primary distinction is packaging format (tube versus bulk) and product status (active versus discontinued).

Parameter Comparison

Engineering Selection Recommendations

The PCM1798DB is the manufacturer-recommended substitute for the PCM1798DBG4. Both parts are manufactured by Texas Instruments and share identical electrical specifications and mechanical packaging. The PCM1798DB maintains active product status, ensuring long-term availability and supply chain stability compared to the discontinued PCM1798DBG4.

Both parts comply with ROHS3 and REACH requirements, making them suitable for applications subject to environmental and regulatory compliance standards. The PCM1798DB is available in higher inventory quantities (1491 units versus 661 units), providing greater procurement flexibility.

The substitution is electrically and mechanically transparent. No circuit modifications, firmware changes, or design alterations are required when transitioning from PCM1798DBG4 to PCM1798DB.

Frequently Asked Questions (FAQ)

Q: Can the PCM1798DB be used as a direct replacement for the PCM1798DBG4?

A: Yes. The PCM1798DB is electrically and mechanically identical to the PCM1798DBG4. Both devices feature the same 24-bit resolution, 200 kHz sampling rate, dual-channel PCM interface, voltage supply requirements, operating temperature range, and 28-SSOP package footprint. No circuit modifications are required.

Q: What is the difference between PCM1798DBG4 and PCM1798DB?

A: The primary differences are product status and packaging format. The PCM1798DBG4 is discontinued at DiGi Electronics and supplied in bulk packaging, while the PCM1798DB is an active product supplied in tube packaging. All electrical and mechanical specifications are identical.

Q: Are there any pin compatibility concerns?

A: No. Both parts use the identical 28-SSOP package with 0.209" (5.30mm) width. Pin assignments, signal levels, and PCB footprints are identical. The devices are pin-for-pin compatible.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the PCM1798DBG4 and PCM1798DB are ROHS3 compliant and REACH unaffected. Moisture sensitivity level is identical (MSL 1, Unlimited). Both parts meet the same environmental and regulatory requirements.

Q: Which part should be selected for new designs?

A: The PCM1798DB should be selected for new designs. It maintains active product status, ensuring continued availability and manufacturer support. The PCM1798DBG4 is discontinued and should be reserved for legacy system maintenance only.