DS1213D Equivalent & Substitute Parts

Part Overview

The DS1213D is a Smartsocket SRAM memory integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. This 256K/1M capacity device operates within a 4.75V to 5.5V supply voltage range and supports operating temperatures from 0°C to 70°C. The component is mounted through-hole in a 32-DIP (0.600", 15.24mm) socket package. As an obsolete product, sourcing original DS1213D units presents supply chain challenges, making equivalent substitutes necessary for system maintenance and legacy equipment support.

Substiute Parts

DS1213D

Analog Devices Inc./Maxim IntegratedIn Stock: 2258DS1213D Datasheet

Current PartRFQ

M48Z35-70PC1

STMicroelectronicsIn Stock: 1675M48Z35-70PC1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DS1213D is determined by the following critical parameters:

Supply voltage compatibility (4.75V ~ 5.5V) ensures the substitute operates within the same electrical environment as the original circuit. Operating temperature range (0°C ~ 70°C) must match to maintain functional reliability across specified conditions. Memory capacity (256Kbit minimum) and organization (32K x 8) define the addressable storage and data width requirements. Through-hole mounting type and DIP package format ensure mechanical compatibility with existing PCB socket designs. Memory interface type (parallel) and access time specifications determine functional equivalence in read/write operations.

The M48Z35-70PC1 qualifies as a substitute based on matching supply voltage, operating temperature range, memory capacity, memory organization, parallel interface, and through-hole mounting. Package differences (28-PCDIP versus 32-DIP) require physical verification of socket compatibility.

Parameter Comparison

Engineering Selection Recommendations

The M48Z35-70PC1 is an active product with current manufacturing support and ROHS3 compliance, addressing supply continuity concerns associated with the obsolete DS1213D. Both components share identical supply voltage (4.75V ~ 5.5V) and operating temperature (0°C ~ 70°C) specifications, ensuring electrical compatibility within the same circuit environment.

The M48Z35-70PC1 implements Non-Volatile SRAM (NVSRAM) technology, which provides data retention during power loss—a functional enhancement over standard SRAM. This characteristic does not preclude substitution in applications where volatile memory operation is acceptable. The 70 ns access time and 32K x 8 organization support equivalent memory performance and addressing schemes.

Package pin count differs (28-PCDIP versus 32-DIP), requiring physical verification that the substitute fits the existing socket configuration. Pin assignment compatibility must be confirmed through detailed datasheet comparison before implementation.

Frequently Asked Questions (FAQ)

Q: Can the M48Z35-70PC1 directly replace the DS1213D in existing circuits?

A: Electrical compatibility is confirmed through matching supply voltage and operating temperature ranges. Physical compatibility requires verification of socket pin count and assignment. The 28-pin M48Z35-70PC1 differs from the 32-pin DS1213D, necessitating socket adapter evaluation or PCB modification.

Q: What is the functional difference between SRAM and NVSRAM?

A: SRAM (Static Random Access Memory) loses stored data upon power removal. NVSRAM (Non-Volatile SRAM) retains data during power loss through integrated non-volatile storage. In applications requiring volatile memory operation, NVSRAM functions identically to SRAM while providing additional data retention capability.

Q: Are there compliance implications when substituting the DS1213D with the M48Z35-70PC1?

A: The M48Z35-70PC1 is ROHS3 compliant, whereas the DS1213D is RoHS non-compliant. Systems subject to RoHS regulations benefit from this substitution. Systems with no RoHS requirements are unaffected by this difference.

Q: What parameters must match for successful substitution?

A: Supply voltage (4.75V ~ 5.5V), operating temperature range (0°C ~ 70°C), memory capacity (256Kbit), memory organization (32K x 8), and parallel interface type are critical for functional equivalence. Package compatibility and pin assignment must be verified independently.

Q: Is the M48Z35-70PC1 available in current inventory?

A: Yes, 1617 pieces are in stock as new original components. The DS1213D, being obsolete, has limited availability (2200 pieces noted as existing inventory only).