DS1230AB-100 NVSRAM Equivalent & Substitute Parts

Part Overview

The DS1230AB-100 is a Non-Volatile SRAM (NVSRAM) memory integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. This 256Kbit parallel memory device operates at 100 ns access time and is packaged in a 28-EDIP through-hole module. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance, repair, and legacy equipment support.

Key Parameters

Parameter	Value
Memory Type	Non-Volatile SRAM (NVSRAM)
Memory Size	256Kbit
Memory Organization	32K x 8
Memory Interface	Parallel
Access Time	100 ns
Write Cycle Time	100 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

Substitute Part Grouping Explanation

Substitution for the DS1230AB-100 is determined by the following critical parameters:

Memory Capacity & Organization: 256Kbit, 32K x 8 configuration
Memory Technology: NVSRAM (Non-Volatile SRAM)
Interface Type: Parallel interface
Package Compatibility: 28-DIP through-hole module (0.600", 15.24mm)
Electrical Compatibility: Supply voltage range and operating temperature range

Substitute parts must maintain identical memory capacity, organization, interface type, and physical package dimensions. Access time and write cycle time may vary, provided the substitute meets or exceeds the performance requirements of the original design.

Parameter Comparison

Parameter	DS1230AB-100	DS1230AB-100+	DS1230AB-70+	M48Z35-70PC1
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	STMicroelectronics
Memory Type	NVSRAM	NVSRAM	NVSRAM	NVSRAM
Memory Size	256Kbit	256Kbit	256Kbit	256Kbit
Memory Organization	32K x 8	32K x 8	32K x 8	32K x 8
Memory Interface	Parallel	Parallel	Parallel	Parallel
Access Time	100 ns	100 ns	70 ns	70 ns
Write Cycle Time	100 ns	100 ns	70 ns	70 ns
Supply Voltage	4.75V ~ 5.25V	4.75V ~ 5.25V	4.75V ~ 5.25V	4.75V ~ 5.5V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C
Package / Case	28-DIP Module (0.600", 15.24mm)	28-DIP Module (0.600", 15.24mm)	28-DIP Module (0.600", 15.24mm)	28-DIP Module (0.600", 15.24mm)
Supplier Device Package	28-EDIP	28-EDIP	28-EDIP	28-PCDIP, CAPHAT®
Product Status	Obsolete	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

DS1230AB-100+ is the direct equivalent substitute for DS1230AB-100. Both parts are manufactured by Analog Devices Inc./Maxim Integrated with identical electrical and mechanical specifications. The primary distinction is product status: DS1230AB-100+ is active and available, while DS1230AB-100 is obsolete. DS1230AB-100+ is ROHS3 compliant, whereas the original part is RoHS non-compliant. This substitute provides identical performance characteristics and is the preferred choice for direct replacement.

DS1230AB-70+ is a performance-enhanced substitute offering 70 ns access and write cycle times compared to the 100 ns specification of the original part. This faster variant is backward compatible with designs requiring the DS1230AB-100, as it exceeds the original performance envelope. DS1230AB-70+ is also ROHS3 compliant and actively manufactured by Analog Devices Inc./Maxim Integrated.

M48Z35-70PC1 is a manufacturer-recommended alternative from STMicroelectronics. This part maintains identical memory capacity, organization, and parallel interface specifications. The M48Z35-70PC1 operates at 70 ns access time and supports a slightly extended supply voltage range (4.75V ~ 5.5V). The package designation differs (28-PCDIP with CAPHAT® versus 28-EDIP), though both are 28-DIP through-hole modules with identical physical dimensions. M48Z35-70PC1 is ROHS3 compliant and actively produced.

Frequently Asked Questions (FAQ)

Q: Can DS1230AB-100+ be used as a direct replacement for DS1230AB-100?

A: Yes. DS1230AB-100+ is electrically and mechanically identical to DS1230AB-100. Both operate at 100 ns access time, support identical supply voltage ranges (4.75V ~ 5.25V), and use the same 28-DIP through-hole package. The primary difference is product status and RoHS compliance.

Q: Is DS1230AB-70+ compatible with designs specified for DS1230AB-100?

A: Yes. DS1230AB-70+ is backward compatible. It provides faster access and write cycle times (70 ns versus 100 ns), which exceeds the performance requirements of the original specification. Electrical and mechanical parameters remain compatible.

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

A: Both designations refer to 28-pin DIP through-hole packages with identical physical dimensions (0.600", 15.24mm). The EDIP designation indicates a standard DIP package, while PCDIP with CAPHAT® indicates a plastic DIP package with a ceramic hat. Both are mechanically and electrically compatible for through-hole mounting applications.

Q: Can M48Z35-70PC1 replace DS1230AB-100 in legacy equipment?

A: Yes. M48Z35-70PC1 maintains identical memory specifications (256Kbit, 32K x 8, parallel interface) and physical package dimensions. The extended supply voltage range (4.75V ~ 5.5V) provides additional operational margin. The primary consideration is manufacturer transition from Analog Devices/Maxim to STMicroelectronics.

Q: Are all substitute parts RoHS compliant?

A: DS1230AB-100+ and DS1230AB-70+ are ROHS3 compliant. M48Z35-70PC1 is also ROHS3 compliant. The original DS1230AB-100 is RoHS non-compliant. All substitute parts meet current environmental compliance standards.

Q: What is the inventory status of these substitute parts?

A: DS1230AB-100+ has 1719 pieces in stock. DS1230AB-70+ has 1298 pieces in stock. M48Z35-70PC1 has 1617 pieces in stock. All substitute parts are actively manufactured and available.

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