DS1230AB-70+ NVSRAM Equivalent & Substitute Parts

Part Overview

The DS1230AB-70+ is a Non-Volatile SRAM (NVSRAM) memory integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. This 256Kbit parallel memory device combines SRAM speed with non-volatile storage capability, making it suitable for applications requiring data retention without external power. The device is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Alternative equivalent parts may be required due to supply availability, regional sourcing preferences, or inventory constraints while maintaining identical electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Memory Type	Non-Volatile SRAM (NVSRAM)
Memory Size	256Kbit
Memory Organization	32K x 8
Memory Interface	Parallel
Access Time	70 ns
Write Cycle Time	70 ns
Supply Voltage	4.75V ~ 5.25V
Operating Temperature	0°C ~ 70°C
Package Type	28-DIP Module (0.600", 15.24mm)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the DS1230AB-70+ is determined by strict equivalence across the following critical parameters:

Memory capacity: 256Kbit (32K x 8 organization)
Memory technology: NVSRAM (Non-Volatile SRAM)
Interface type: Parallel
Access and write cycle time: 70 ns
Supply voltage range: Minimum 4.75V, maximum 5.25V or higher
Package form factor: 28-pin DIP module with 0.600" (15.24mm) pitch
Mounting method: Through Hole
Compliance: ROHS3 Compliant, MSL 1

The substitute part M48Z35-70PC1 meets all electrical and mechanical requirements for direct substitution. Both devices share identical memory specifications, timing characteristics, and physical packaging dimensions. Voltage supply range compatibility is maintained, with the substitute supporting an extended upper limit (5.5V vs. 5.25V).

Parameter Comparison

Parameter	DS1230AB-70+ (Analog Devices)	M48Z35-70PC1 (STMicroelectronics)	Compatibility
Memory Type	NVSRAM	NVSRAM	Identical
Memory Size	256Kbit	256Kbit	Identical
Memory Organization	32K x 8	32K x 8	Identical
Memory Interface	Parallel	Parallel	Identical
Access Time	70 ns	70 ns	Identical
Write Cycle Time	70 ns	70 ns	Identical
Supply Voltage	4.75V ~ 5.25V	4.75V ~ 5.5V	Compatible (extended range)
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	Identical
Package Type	28-DIP Module (0.600", 15.24mm)	28-DIP Module (0.600", 15.24mm)	Identical
Mounting Type	Through Hole	Through Hole	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
MSL Rating	1 (Unlimited)	1 (Unlimited)	Identical

Engineering Selection Recommendations

Both the DS1230AB-70+ and M48Z35-70PC1 are active production devices with ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on:

Inventory availability and lead time requirements
Regional supplier preference and logistics
Existing supply chain relationships with Analog Devices Inc./Maxim Integrated or STMicroelectronics
Extended voltage tolerance requirement (M48Z35-70PC1 supports 5.5V maximum vs. 5.25V)

Both devices carry identical electrical performance specifications, package dimensions, and regulatory compliance certifications, ensuring direct functional interchangeability in circuit applications.

Frequently Asked Questions (FAQ)

Q: Can M48Z35-70PC1 be used as a direct replacement for DS1230AB-70+ in existing designs?

A: Yes. Both devices are electrically and mechanically equivalent. They share identical memory capacity (256Kbit), organization (32K x 8), access time (70 ns), supply voltage minimum (4.75V), operating temperature range (0°C ~ 70°C), and 28-pin DIP package form factor. The M48Z35-70PC1 supports a higher maximum supply voltage (5.5V vs. 5.25V), which provides additional margin in applications with voltage regulation tolerance.

Q: Are there any package differences between these parts?

A: The physical package dimensions are identical: both use 28-pin DIP modules with 0.600" (15.24mm) pitch for through-hole mounting. The DS1230AB-70+ uses 28-EDIP packaging, while the M48Z35-70PC1 uses 28-PCDIP with CAPHAT® technology. Both are mechanically compatible with standard 28-pin DIP sockets and PCB layouts.

Q: What compliance certifications apply to both parts?

A: Both the DS1230AB-70+ and M48Z35-70PC1 are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited moisture sensitivity level) ratings. Both are classified under ECCN EAR99 and HTSUS 8542.32.0041.

Q: Are there voltage supply differences that affect circuit design?

A: The DS1230AB-70+ operates within 4.75V ~ 5.25V, while the M48Z35-70PC1 operates within 4.75V ~ 5.5V. Both support standard 5V logic supply. The M48Z35-70PC1 provides extended upper voltage tolerance, which may be beneficial in systems with less stringent voltage regulation.

Q: Can these parts be mixed in the same production batch or inventory?

A: Yes. Both devices are functionally equivalent and can be used interchangeably. However, standard component management practices recommend maintaining separate inventory tracking by manufacturer part number for traceability, warranty, and supply chain documentation purposes.

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