DP8570AV Real Time Clock IC Equivalent & Substitute Parts

Part Overview

The DP8570AV is a Real Time Clock (RTC) Timer Clock Peripheral (TCP) integrated circuit manufactured by Texas Instruments. This device provides timekeeping functionality with alarm capabilities and leap year support, operating across a wide temperature range suitable for industrial and commercial applications. The DP8570AV features a 44-byte memory capacity, parallel interface, and dual voltage supply operation (main supply and battery backup).

The DP8570AV carries an obsolete product status. Locating equivalent substitute parts becomes necessary when original inventory is depleted or when design requirements mandate components with current manufacturer support and updated compliance certifications.

Substiute Parts

DP8570AV

Texas InstrumentsIn Stock: 1670DP8570AV Datasheet

Current PartRFQ

DP8570AV/NOPB

Texas InstrumentsIn Stock: 1047DP8570AV/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DP8570AV is determined by strict equivalence across the following critical parameters:

Functional Parameters:

• Device type classification as Timer Clock Peripheral (TCP)
• Memory capacity of 44 bytes
• Parallel interface architecture
• Time and date format specifications (HH:MM:SS:hh and YY-MM-DD-dd)
• Alarm and leap year feature support

Electrical Parameters:

• Main supply voltage range: 4.5V to 5.5V
• Battery backup voltage range: 2.2V to 5.1V
• Timekeeping current specification: 1µA maximum at 5V
• Operating temperature range: -40°C to 85°C

Physical Parameters:

• Package type: 28-LCC (J-Lead)
• Supplier device package: 28-PLCC (11.51x11.51mm)
• Mounting type: Surface Mount

Substitute parts must maintain identical specifications across all listed parameters to ensure direct functional and mechanical compatibility without circuit redesign or board layout modification.

Parameter Comparison

Engineering Selection Recommendations

The DP8570AV/NOPB serves as the direct functional equivalent to the DP8570AV. Both components share identical electrical specifications, memory architecture, interface configuration, and physical packaging. The primary distinction between these parts lies in product lifecycle status and regulatory compliance.

Product Status Consideration: The DP8570AV carries obsolete designation, indicating discontinued manufacturing and limited long-term availability. The DP8570AV/NOPB maintains active product status with ongoing manufacturer support and availability assurance.

Compliance Consideration: The DP8570AV exhibits RoHS non-compliant status. The DP8570AV/NOPB achieves ROHS3 compliance, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution. This compliance difference becomes significant for applications subject to RoHS directives or customer specifications mandating compliant components.

For new designs or component replenishment requiring current manufacturer support and regulatory compliance, the DP8570AV/NOPB is the appropriate selection. For legacy system maintenance where original specifications must be preserved exactly, the DP8570AV remains functionally equivalent where inventory permits.

Frequently Asked Questions (FAQ)

Q: Can the DP8570AV/NOPB replace the DP8570AV in existing circuit designs?

A: Yes. The DP8570AV/NOPB provides complete functional and electrical equivalence to the DP8570AV. All electrical parameters, memory specifications, interface characteristics, and operating ranges are identical. The 28-LCC (J-Lead) package dimensions and surface mount configuration are unchanged, permitting direct substitution without circuit modification or board layout revision.

Q: What is the significance of the "/NOPB" suffix in the DP8570AV/NOPB part number?

A: The "/NOPB" suffix indicates "No Plumbum" (lead-free) manufacturing, reflecting compliance with RoHS3 directives that restrict hazardous substances including lead in electronic components. This designation confirms the component meets current environmental standards while maintaining identical functional performance.

Q: Are there any compatibility concerns when substituting the DP8570AV with the DP8570AV/NOPB?

A: No compatibility concerns exist. Both components operate across identical voltage ranges (4.5V to 5.5V main supply, 2.2V to 5.1V battery backup), support the same temperature operating range (-40°C to 85°C), and provide equivalent timekeeping accuracy specifications. Pin configuration, package footprint, and electrical interface characteristics remain unchanged.

Q: Why would an application require the obsolete DP8570AV instead of the active DP8570AV/NOPB?

A: Legacy systems or applications with strict component qualification requirements may specify the original DP8570AV. However, the DP8570AV/NOPB provides superior long-term availability and regulatory compliance. Component selection should prioritize the active DP8570AV/NOPB unless specific design documentation mandates the obsolete variant.

Q: What packaging options are available for these RTC timer components?

A: Both the DP8570AV and DP8570AV/NOPB are supplied in tube packaging. The physical package is 28-PLCC (11.51x11.51mm) with J-Lead configuration, classified as 28-LCC for surface mount assembly. No alternative package options are provided for these part numbers.

Q: How does the 44-byte memory capacity affect application design?

A: The 44-byte memory provides storage for timekeeping data, alarm settings, and configuration parameters. This capacity is fixed across both the DP8570AV and DP8570AV/NOPB. Applications requiring expanded memory must evaluate alternative RTC devices outside this product family.