DS1230AB-85+ NVSRAM Equivalent & Substitute Parts

Part Overview

The DS1230AB-85+ is a Non-Volatile SRAM (NVSRAM) memory integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. This 256Kbit parallel memory device operates at 85 ns access time and is housed in a 28-EDIP package. The part is currently in active production status with 768 units in stock.

NVSRAM devices combine the speed of SRAM with non-volatile storage capability, making them essential for applications requiring fast access to data that must persist during power loss. Equivalent and substitute parts are identified when design requirements allow for alternative access times, manufacturers, or package variants while maintaining functional compatibility.

Substiute Parts

DS1230AB-85+

Analog Devices Inc./Maxim IntegratedIn Stock: 842DS1230AB-85+ Datasheet

Current PartRFQ

DS1230AB-70+

Analog Devices Inc./Maxim IntegratedIn Stock: 1391DS1230AB-70+ Datasheet

DirectRFQ

DS1230AB-85+

Analog Devices Inc./Maxim IntegratedIn Stock: 842DS1230AB-85+ Datasheet

DirectRFQ

M48Z35-70PC1

STMicroelectronicsIn Stock: 1675M48Z35-70PC1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DS1230AB-85+ is determined by the following critical parameters:

Memory Capacity & Organization: All substitute parts must maintain 256Kbit capacity in 32K x 8 organization to ensure pin-compatible operation and functional equivalence.

Memory Interface: Parallel interface is mandatory for all substitutes to maintain signal compatibility with existing circuit designs.

Package & Mounting: Through-hole 28-DIP package format (0.600", 15.24mm) is required for mechanical and electrical compatibility.

Supply Voltage Compatibility: Operating voltage range must overlap with or encompass the 4.75V ~ 5.25V requirement of the main part.

Access Time: Substitute parts with equal or faster (lower) access times are functionally compatible, as faster devices can operate in applications designed for the original part's timing specifications.

Compliance & Status: All substitute parts must maintain active product status and equivalent RoHS3 compliance to ensure long-term availability and regulatory alignment.

Parameter Comparison

Engineering Selection Recommendations

DS1230AB-70+ (Analog Devices Inc./Maxim Integrated): This part is a direct manufacturer equivalent with identical supply voltage range and package specification. The 70 ns access time is faster than the original 85 ns specification, making it functionally compatible for all applications designed for the DS1230AB-85+. Both parts share the same base product number (DS1230AB) and maintain ROHS3 compliance with unlimited MSL rating. This substitute offers higher inventory availability (1298 units) and improved performance characteristics.

M48Z35-70PC1 (STMicroelectronics): This part is a manufacturer-recommended substitute offering equivalent 256Kbit NVSRAM functionality with 70 ns access time. The supply voltage range extends to 5.5V, providing broader compatibility with systems operating at the upper voltage tolerance. The 28-PCDIP package with CAPHAT® technology maintains mechanical and electrical compatibility with standard 28-DIP footprints. STMicroelectronics designation as the recommended alternative, combined with the highest inventory availability (1617 units) and active product status, supports this as a primary substitute option.

All substitute parts maintain active product status, ROHS3 compliance, and unlimited MSL rating, ensuring regulatory alignment and long-term supply continuity.

Frequently Asked Questions (FAQ)

Q: Can DS1230AB-70+ be used as a direct replacement for DS1230AB-85+?

A: Yes. The DS1230AB-70+ maintains identical memory capacity (256Kbit), organization (32K x 8), parallel interface, supply voltage range (4.75V ~ 5.25V), operating temperature range (0°C ~ 70°C), and 28-EDIP package specification. The 70 ns access time is faster than the original 85 ns specification, making it functionally compatible for all applications designed for the DS1230AB-85+.

Q: What is the difference between 28-EDIP and 28-PCDIP packaging?

A: Both 28-EDIP and 28-PCDIP are 28-pin DIP packages with 0.600" (15.24mm) body width, designed for through-hole mounting on standard PCB footprints. The PCDIP variant used in the M48Z35-70PC1 includes CAPHAT® technology. Both package types are mechanically and electrically compatible with identical pin assignments for this memory device category.

Q: Are there voltage compatibility concerns when substituting M48Z35-70PC1?

A: No. The M48Z35-70PC1 supply voltage range (4.75V ~ 5.5V) encompasses the DS1230AB-85+ requirement (4.75V ~ 5.25V). The extended upper voltage tolerance of the STMicroelectronics part provides additional margin for systems operating at higher supply voltages within standard 5V logic levels.

Q: How do access time differences affect circuit operation?

A: Substitute parts with equal or faster (lower) access times are functionally compatible. The DS1230AB-70+ and M48Z35-70PC1 both offer 70 ns access time, which is faster than the original 85 ns specification. Circuits designed for 85 ns access time will operate correctly with faster devices, as the memory responds more quickly than the original design requirement.

Q: What inventory considerations apply to these substitutes?

A: DS1230AB-70+ has 1298 units in stock, and M48Z35-70PC1 has 1617 units in stock, compared to 768 units of the original DS1230AB-85+. Higher inventory availability for substitute parts may provide supply chain advantages for production planning and lead time reduction.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. DS1230AB-70+, M48Z35-70PC1, and the original DS1230AB-85+ all maintain ROHS3 compliance with unlimited MSL rating (1), ensuring regulatory alignment and consistent handling requirements across all equivalent options.