BR93L56-W EEPROM 2Kbit Microwire Equivalent & Substitute Parts

Part Overview

The BR93L56-W is a 2Kbit EEPROM memory IC manufactured by Rohm Semiconductor with Microwire serial interface, designed for non-volatile data storage applications. This part operates at 2 MHz clock frequency with a supply voltage range of 1.8V to 5.5V and is packaged in 8-DIP through-hole configuration. The BR93L56-W is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. Substitute parts maintain core memory specifications while offering improved availability, enhanced operating parameters, or alternative packaging options.

Key Parameters

Parameter	BR93L56-W
Memory Size	2Kbit
Memory Organization	128 x 16
Memory Interface	Microwire
Clock Frequency	2 MHz
Write Cycle Time	5ms
Voltage Supply Range	1.8V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Package	8-DIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the BR93L56-W are qualified based on the following critical parameters:

Core Compatibility Requirements:

Memory Size: 2Kbit (128 x 16 organization)
Memory Interface: Microwire serial protocol
Memory Type: Non-Volatile EEPROM
RoHS Compliance: ROHS3 Compliant

Acceptable Variation Parameters:

Clock Frequency: 2 MHz or higher (backward compatible)
Write Cycle Time: Equal to or faster than 5ms
Voltage Supply Range: Must encompass or exceed 1.8V ~ 5.5V minimum requirement
Operating Temperature: Must support -40°C ~ 85°C minimum range
Mounting Type: Through Hole (primary) or Surface Mount (alternative)
Package: 8-DIP through-hole (primary) or 8-SOIC surface mount (alternative)

Substitutes are grouped into two categories: direct pin-compatible replacements (8-DIP through-hole) and functional equivalents with alternative packaging (8-SOIC surface mount).

Parameter Comparison

Part Number	Manufacturer	Memory Size	Interface	Clock Freq	Write Cycle	Voltage Range	Temp Range	Package	Status
BR93L56-W	Rohm Semiconductor	2Kbit	Microwire	2 MHz	5ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-DIP	Obsolete
BR93G56FJ-3AGTE2	Rohm Semiconductor	2Kbit	Microwire	3 MHz	5ms	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
93AA56B-I/P	Microchip Technology	2Kbit	Microwire	2 MHz	6ms	1.8V ~ 5.5V	-40°C ~ 85°C	8-DIP	Active
93C56B-E/P	Microchip Technology	2Kbit	Microwire	2 MHz	2ms	4.5V ~ 5.5V	-40°C ~ 125°C	8-DIP	Active
93C56B-I/P	Microchip Technology	2Kbit	Microwire	2 MHz	2ms	4.5V ~ 5.5V	-40°C ~ 85°C	8-DIP	Active
93LC56B-E/P	Microchip Technology	2Kbit	Microwire	2 MHz	6ms	2.5V ~ 5.5V	-40°C ~ 125°C	8-DIP	Active
93LC56B-I/P	Microchip Technology	2Kbit	Microwire	2 MHz	6ms	2.5V ~ 5.5V	-40°C ~ 85°C	8-DIP	Active
93LC56B/P	Microchip Technology	2Kbit	Microwire	2 MHz	6ms	2.5V ~ 5.5V	0°C ~ 70°C	8-DIP	Active

Engineering Selection Recommendations

Direct Pin-Compatible Replacements (8-DIP Through-Hole):

The Microchip Technology 93AA56B-I/P, 93C56B-E/P, 93C56B-I/P, 93LC56B-E/P, 93LC56B-I/P, and 93LC56B/P are functionally equivalent to the BR93L56-W with identical 8-DIP packaging and through-hole mounting. All substitute parts maintain 2Kbit capacity, Microwire interface, and ROHS3 compliance. Selection among these options depends on specific voltage supply and temperature operating requirements:

93AA56B-I/P: Matches original voltage range (1.8V ~ 5.5V) and temperature range (-40°C ~ 85°C). Write cycle time of 6ms is acceptable for applications tolerating slightly longer write operations.
93C56B-E/P and 93C56B-I/P: Offer faster write cycle time (2ms) and extended temperature range to 125°C. Voltage supply range is narrower (4.5V ~ 5.5V), suitable only for systems with regulated 5V supplies.
93LC56B-E/P: Supports low-voltage operation (2.5V ~ 5.5V) with extended temperature range (-40°C ~ 125°C). Ideal for battery-powered or low-voltage applications.
93LC56B-I/P: Combines low-voltage support (2.5V ~ 5.5V) with standard temperature range (-40°C ~ 85°C).
93LC56B/P: Supports low-voltage operation (2.5V ~ 5.5V) with commercial temperature range (0°C ~ 70°C). Suitable for non-industrial applications.

Surface Mount Alternative:

The BR93G56FJ-3AGTE2 from Rohm Semiconductor provides functional equivalence in 8-SOIC surface mount packaging. This part operates at 3 MHz (higher than original 2 MHz), maintains 5ms write cycle time, and supports voltage range of 1.7V ~ 5.5V. This option is appropriate for new PCB designs or rework scenarios where surface mount technology is preferred.

Product Status Consideration:

All recommended substitutes are classified as Active products with current manufacturing and distribution support, ensuring long-term availability compared to the obsolete BR93L56-W.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a higher clock frequency than the BR93L56-W?

A: Yes. The BR93G56FJ-3AGTE2 operates at 3 MHz compared to the original 2 MHz. Higher clock frequency is backward compatible and does not affect system functionality in applications designed for 2 MHz operation.

Q: What is the difference between 93C56B and 93LC56B variants?

A: The 93C56B series operates at 4.5V ~ 5.5V supply voltage, while the 93LC56B series supports lower voltage operation at 2.5V ~ 5.5V. The 93LC56B is suitable for applications requiring low-voltage compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the environmental certification of the original BR93L56-W.

Q: Can I use the BR93G56FJ-3AGTE2 as a direct replacement in existing through-hole PCBs?

A: No. The BR93G56FJ-3AGTE2 uses 8-SOIC surface mount packaging, while the BR93L56-W uses 8-DIP through-hole packaging. This part requires PCB redesign or adapter solutions. For direct through-hole replacement, select from the 8-DIP packaged alternatives.

Q: Which substitute part has the fastest write cycle time?

A: The 93C56B-E/P and 93C56B-I/P offer the fastest write cycle time at 2ms, compared to 5ms for the original BR93L56-W. This improvement is beneficial for applications requiring rapid data storage operations.

Q: What is the temperature range difference between substitute parts?

A: Temperature ranges vary by part number. The 93C56B-E/P and 93LC56B-E/P support extended range to 125°C. The 93LC56B/P operates at commercial range (0°C ~ 70°C). The 93AA56B-I/P, 93C56B-I/P, and 93LC56B-I/P maintain the original -40°C ~ 85°C range.

Q: Are there inventory considerations for substitute selection?

A: Inventory levels vary. The 93LC56B-I/P has the highest inventory (16,200 pcs), while the 93C56B-I/P has 1,501 pcs. The BR93G56FJ-3AGTE2 has 3,489 pcs available. Verify current stock status with your supplier for production planning.

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