DS1302Z+

DS1302Z+ Overview

DS1302Z+ is a Analog Devices (Maxim Integrated) trickle-charge real-time clock with 3-wire interface in a compact surface-mount package supplied in 8-pin SOIC, 150 mil. This page uses the exact orderable code because package, grade, temperature and option suffixes can change compatibility.

Key Technical Specifications

Package and Ordering Notes

The listed package is 8-pin SOIC, 150 mil with 8 pins, leads, lands or contacts. The featured image is a generic package illustration for form-factor identification and is not an actual date-code or lot photograph. The part or family is listed by Analog Devices (Maxim Integrated) as Production at the verification date.

Sourcing Guidance

Confirm current factory lead time, packing format and revision for DS1302Z+ before placing the order.

For an accurate quotation, include the full MPN, target quantity, acceptable date-code range, packaging format and destination. Icearth can help review traceability documents, label photos and electrical/package alignment before order placement.

Manufacturer Documentation

Technical values were checked against Analog Devices (Maxim Integrated) documentation. Use the linked datasheet as the controlling source and re-check revisions before PCB release or firmware qualification.

DS1302Z+ selection and design context

DS1302Z+ is cataloged as a Real-Time Clock in the DS1302 family. Its recorded function is trickle-charge real-time clock with 3-wire interface in a compact surface-mount package. Selection should be based on the complete electrical limits, package drawing and ordering suffix rather than the abbreviated family code.

• Interface: 3-wire serial. Confirm logic levels, signaling mode, host support and required external components.
• Supply Voltage: 2.0 V to 5.5 V. Check rail compatibility, tolerance and sequencing under worst-case conditions.
• User RAM: 31 × 8 bits. Confirm the value and its datasheet test conditions for the exact ordering suffix.
• Backup Charging: Programmable trickle charger. Confirm the value and its datasheet test conditions for the exact ordering suffix.

Application and qualification considerations

When evaluating this timing device, confirm oscillator requirements, timekeeping accuracy, backup-supply behavior and serial-interface compatibility. For a new design, review power-up behavior, interface timing, absolute maximum ratings, thermal limits and any external-component requirements in the latest manufacturer documentation. Existing-board replacement work should additionally confirm pinout, footprint, firmware assumptions and qualification grade.

Procurement checks for DS1302Z+

The recorded package is 8-pin SOIC, 150 mil, the temperature range is 0°C to +70°C, and the lifecycle status is Production as of 2026-07-20. Before ordering, confirm the exact MPN on the label, packing format, quantity, date-code requirements, traceability documents and current factory status.

DS1302Z+ FAQ

How DS1302Z+ differs from related orderable parts

DS1302Z+ belongs to the DS1302 family. Compared with DS1302+, the recorded differences include functional description: trickle-charge real-time clock with 3-wire interface in a compact surface-mount package versus trickle-charge timekeeping IC with 3-wire serial interface and 31 bytes of static RAM and package: 8-pin SOIC, 150 mil versus 8-pin PDIP, 300 mil. A shared family name does not establish pin, firmware or qualification compatibility.

For an RFQ or AVL review, quote the complete DS1302Z+ code and verify the manufacturer ordering table, package drawing, packing method and revision. The related numbers above are comparison references, not declared drop-in replacements.

Exact order-code identity for DS1302Z+

For BOM, label, AVL and RFQ matching, preserve these visible code segments: opening alphabetic sequence DS; middle numeric sequence one three zero two; and terminal alphabetic sequence Z. The nearest published comparison codes are DS1302+; DS1307+; and DS12887. Compare every segment because a changed character can identify a different density, voltage, package, temperature, qualification or packing option.

Do not shorten the requested code to DS1302 or remove its terminal characters. Ask the supplier to reproduce the complete code on the quotation and provide label or traceability evidence when exact suffix matching is mandatory.

DS1302Z+ specification interpretation

The following notes interpret the recorded values for this exact orderable code. They are intended to make model-to-model differences visible during engineering and procurement review; the manufacturer datasheet remains the controlling source.

• Interface: The recorded value is 3-wire serial, expressed in words as three-wire serial. Confirm logic levels, signaling mode, host support and required external components.
• Supply Voltage: The recorded value is 2.0 V to 5.5 V, expressed in words as two point zero V to five point five V. Check rail compatibility, tolerance and sequencing under worst-case conditions.
• User RAM: The recorded value is 31 × 8 bits, expressed in words as thirty one × eight bits. Confirm the value and its datasheet test conditions for the exact ordering suffix.
• Backup Charging: The recorded value is Programmable trickle charger. Confirm the value and its datasheet test conditions for the exact ordering suffix.
• Timekeeping: The recorded value is Seconds through year with leap-year compensation. Confirm the value and its datasheet test conditions for the exact ordering suffix.

Choosing between DS1302Z+ and DS1302+

The decision points below use the values recorded for these two exact orderable codes. Select DS1302Z+ when its stated value is the BOM requirement; select DS1302+ only when the alternate value has been independently approved.

• package: the current page records 8-pin SOIC, 150 mil, while the comparison page records 8-pin PDIP, 300 mil. This difference can affect footprint, assembly and mechanical compatibility.
• functional description: the current page records trickle-charge real-time clock with 3-wire interface in a compact surface-mount package, while the comparison page records trickle-charge timekeeping IC with 3-wire serial interface and 31 bytes of static RAM. This difference can affect intended function and feature set.

If the assembly documentation names DS1302Z+, require the quotation and supplied label to retain DS1302Z+ in full. A request for DS1302+ should be handled as a proposed substitution and reviewed for electrical, mechanical, firmware and qualification impact before approval.