1339AC-31CSRGI Equivalent & Substitute Parts

Part Overview

The 1339AC-31CSRGI is a Real Time Clock (RTC) IC with integrated Clock/Calendar functionality, manufactured by Renesas Electronics Corporation. This device operates via I2C serial interface and is housed in a 16-SOIC surface mount package. The part is classified as Obsolete, necessitating identification of active equivalent components for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility across timing, interface, voltage, and thermal specifications while accommodating package form factor differences.

Substiute Parts

1339AC-31CSRGI

Renesas Electronics CorporationIn Stock: 9351339AC-31CSRGI Datasheet

Current PartRFQ

1339-31DVGI

Renesas Electronics CorporationIn Stock: 23771339-31DVGI Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1339AC-31CSRGI is determined by strict equivalence across the following parameters:

Functional Compatibility Parameters:

• Clock/Calendar type with identical time format (HH:MM:SS 12/24 hr) and date format (YY-MM-DD-dd)
• I2C serial interface protocol
• Feature set: Alarm, Leap Year, Square Wave Output, Trickle-Charger

Electrical Compatibility Parameters:

• Supply voltage range: 3.3V ~ 5.5V
• Battery supply voltage range: 1.3V ~ 3.7V
• Timekeeping current: 200µA @ 3.63V ~ 5.5V
• Operating temperature range: -40°C ~ 85°C

Physical Compatibility Parameters:

• Surface mount technology
• Moisture Sensitivity Level: 3 (168 Hours)

Regulatory Compliance Parameters:

• ECCN: EAR99
• HTSUS: 8542.39.0001

The 1339-31DVGI meets all functional, electrical, and regulatory requirements for substitution. Package form factor differs (8-TSSOP versus 16-SOIC), requiring PCB layout modification but maintaining electrical compatibility through identical pin functionality.

Parameter Comparison

Engineering Selection Recommendations

The 1339-31DVGI is the qualified substitute for the 1339AC-31CSRGI based on the following engineering criteria:

Product Status Alignment: The 1339AC-31CSRGI is classified as Obsolete. The 1339-31DVGI carries Active product status, ensuring continued availability, manufacturing support, and compliance with current supply chain requirements.

Functional Equivalence: Both devices provide identical Clock/Calendar functionality with matching time format (HH:MM:SS 12/24 hr), date format (YY-MM-DD-dd), and feature sets (Alarm, Leap Year, Square Wave Output, Trickle-Charger).

Electrical Compatibility: Supply voltage ranges, battery voltage ranges, timekeeping current specifications, and operating temperature ranges are identical across both parts, ensuring direct functional replacement in circuit operation.

Regulatory Compliance: Both parts share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications, maintaining regulatory compliance across supply chain transitions.

RoHS and Environmental Compliance: The 1339-31DVGI is ROHS3 Compliant and REACH Unaffected, meeting current environmental and hazardous substance directives.

Package Consideration: The 1339-31DVGI uses an 8-TSSOP package versus the 16-SOIC package of the main part. This represents a significant physical form factor change requiring PCB layout redesign. However, electrical pin functionality remains compatible through the I2C interface protocol.

Frequently Asked Questions (FAQ)

Q: Can the 1339-31DVGI be used as a direct drop-in replacement for the 1339AC-31CSRGI?

A: The 1339-31DVGI provides electrical and functional equivalence but requires PCB layout modification due to package form factor differences (8-TSSOP versus 16-SOIC). Pin assignments differ between packages, necessitating schematic and layout updates.

Q: What are the key differences between the 1339AC-31CSRGI and 1339-31DVGI?

A: The primary difference is package type: 1339AC-31CSRGI uses 16-SOIC (0.295", 7.50mm Width), while 1339-31DVGI uses 8-TSSOP (0.118", 3.00mm Width). All electrical specifications, voltage ranges, current ratings, temperature ranges, and functional features are identical.

Q: Are the supply voltage and battery voltage specifications identical?

A: Yes. Both parts operate with supply voltage of 3.3V ~ 5.5V and battery supply voltage of 1.3V ~ 3.7V. Timekeeping current is specified at 200µA @ 3.63V ~ 5.5V for both devices.

Q: What is the significance of the Active product status for the 1339-31DVGI?

A: Active product status indicates ongoing manufacturing, availability, and manufacturer support. This is critical for the 1339AC-31CSRGI, which is Obsolete and subject to end-of-life discontinuation.

Q: Do both parts support the same I2C interface protocol?

A: Yes. Both the 1339AC-31CSRGI and 1339-31DVGI use I2C serial interface for communication, ensuring protocol compatibility in system integration.

Q: What is the operating temperature range for both devices?

A: Both parts operate across -40°C ~ 85°C (TA), providing identical thermal performance specifications for industrial and commercial applications.

Q: Are there any differences in moisture sensitivity or handling requirements?

A: No. Both parts carry Moisture Sensitivity Level (MSL) 3 (168 Hours), requiring identical moisture control and storage protocols during manufacturing and assembly.

Q: What regulatory certifications apply to the 1339-31DVGI?

A: The 1339-31DVGI is ROHS3 Compliant and REACH Unaffected, meeting current environmental and hazardous substance regulations. Both parts share ECCN EAR99 and HTSUS 8542.39.0001 classifications.