DS1384FP-12 Equivalent & Substitute Parts

Part Overview

The DS1384FP-12 is a Real Time Clock (RTC) IC with Clock/Calendar functionality manufactured by Analog Devices Inc./Maxim Integrated. This device operates as a parallel interface RTC with 50 bytes of memory, supporting both 12/24-hour time formats and calendar functions including leap year compensation and alarm capabilities. The DS1384FP-12 is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing system support. Substitute parts must maintain functional compatibility across timing, calendar, and interface requirements while accommodating different packaging and voltage specifications.

Substiute Parts

DS1384FP-12

Analog Devices Inc./Maxim IntegratedIn Stock: 932DS1384FP-12 Datasheet

Current PartRFQ

BQ4802LYDW

Texas InstrumentsIn Stock: 1993BQ4802LYDW Datasheet

MFR RecommendedRFQ

BQ4802LYPW

Texas InstrumentsIn Stock: 9564BQ4802LYPW Datasheet

MFR RecommendedRFQ

M48T12-70PC1

STMicroelectronicsIn Stock: 2150M48T12-70PC1 Datasheet

MFR RecommendedRFQ

M48T58Y-70PC1

STMicroelectronicsIn Stock: 1732M48T58Y-70PC1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the DS1384FP-12 is based on the following critical parameters:

Functional Compatibility Requirements:

• Parallel interface architecture
• Clock/Calendar functionality with date and time tracking
• Alarm and watchdog timer capabilities
• Operating temperature range: 0°C ~ 70°C
• Battery backup voltage support: 2.4V ~ 4V

Electrical Compatibility Considerations:

• Supply voltage range (primary consideration for circuit integration)
• Timekeeping current consumption
• Battery backup capability

Physical Compatibility Considerations:

• Package type and form factor (affects PCB layout and mounting)
• Mounting method (surface mount vs. through-hole)

Substitute parts are grouped into two categories based on voltage compatibility:

Group 1 (5V Supply Compatible): M48T12-70PC1 and M48T58Y-70PC1 maintain the 4.5V ~ 5.5V supply voltage range of the original part, ensuring direct electrical compatibility in 5V systems.

Group 2 (3.3V Supply Compatible): BQ4802LYDW and BQ4802LYPW operate at 2.7V ~ 3.6V supply voltage, suitable for modern 3.3V logic systems. These parts require voltage level consideration during integration.

All substitute parts maintain parallel interface architecture, calendar functionality, and the required operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

For 5V System Integration (Direct Voltage Compatibility):

M48T12-70PC1 and M48T58Y-70PC1 are recommended for designs requiring 4.5V ~ 5.5V supply voltage operation. Both parts are active products with ROHS3 compliance and unlimited moisture sensitivity ratings, providing superior long-term availability and environmental compliance compared to the obsolete DS1384FP-12. M48T12-70PC1 operates in a 24-DIP package, while M48T58Y-70PC1 uses a 28-DIP package; selection depends on pin count requirements and PCB layout constraints. Both maintain through-hole mounting, which may require PCB redesign if the original design uses surface-mount components.

For 3.3V System Integration (Voltage Conversion Required):

BQ4802LYDW and BQ4802LYPW are active products from Texas Instruments operating at 2.7V ~ 3.6V supply voltage. These parts are suitable for modern 3.3V logic systems and offer lower timekeeping current consumption (1.5mA typical) compared to the original part. BQ4802LYDW uses a 28-SOIC package, while BQ4802LYPW uses a 28-TSSOP package; the TSSOP variant provides a narrower footprint for space-constrained applications. Both parts include daylight savings and supervisor features not present in the original device. Integration into 5V systems requires voltage level translation circuitry.

Compliance Considerations:

All substitute parts carry ROHS3 compliance and MSL-1 ratings, providing superior environmental compliance and handling flexibility compared to the RoHS non-compliant, MSL-3 rated original part.

Frequently Asked Questions (FAQ)

Q: Can BQ4802LYDW or BQ4802LYPW be used as direct replacements in a 5V system?

A: No. The BQ4802 series operates at 2.7V ~ 3.6V supply voltage and cannot be directly substituted into 5V circuits without voltage level translation. For 5V systems, use M48T12-70PC1 or M48T58Y-70PC1, which maintain the 4.5V ~ 5.5V supply voltage range.

Q: What is the difference between M48T12-70PC1 and M48T58Y-70PC1?

A: Both parts operate at 4.5V ~ 5.5V and share identical electrical specifications. The primary difference is package pin count: M48T12-70PC1 uses a 24-DIP package, while M48T58Y-70PC1 uses a 28-DIP package. Selection depends on the number of I/O pins required by the application and PCB layout compatibility.

Q: What is the difference between BQ4802LYDW and BQ4802LYPW?

A: Both parts are functionally identical Texas Instruments RTC devices operating at 2.7V ~ 3.6V. The difference is package type: BQ4802LYDW uses a 28-SOIC package (0.295" width), while BQ4802LYPW uses a 28-TSSOP package (0.173" width). The TSSOP variant provides a narrower footprint for space-constrained PCB designs.

Q: Does the DS1384FP-12 support 12-hour time format?

A: Yes. The DS1384FP-12 supports both 12-hour and 24-hour time formats. BQ4802LYDW and BQ4802LYPW also support both formats. M48T12-70PC1 and M48T58Y-70PC1 support 24-hour format only.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts (BQ4802LYDW, BQ4802LYPW, M48T12-70PC1, M48T58Y-70PC1) are ROHS3 compliant. The original DS1384FP-12 is RoHS non-compliant.

Q: What is the MSL rating difference, and why does it matter?

A: The DS1384FP-12 has an MSL-3 rating (168-hour shelf life limit), while all substitute parts have MSL-1 ratings (unlimited shelf life). MSL-1 rated components have superior moisture tolerance and longer usable shelf life, reducing risk of moisture-induced failures during storage and assembly.

Q: Can I use a through-hole package substitute (M48T12-70PC1 or M48T58Y-70PC1) in place of the surface-mount DS1384FP-12?

A: No. The DS1384FP-12 uses surface-mount 44-QFP packaging, while M48T12-70PC1 and M48T58Y-70PC1 use through-hole DIP packages. Substitution requires PCB redesign to accommodate the different mounting method and footprint.

Q: Which substitute part has the lowest power consumption?

A: BQ4802LYDW and BQ4802LYPW have the lowest timekeeping current consumption at 1.5mA typical (at 2.7V ~ 3.6V), compared to 3mA for the original DS1384FP-12 and the M48T series parts.