BR93C76-WDS6TP EEPROM Equivalent & Substitute Parts

Part Overview

The BR93C76-WDS6TP is an 8Kbit EEPROM memory IC manufactured by Rohm Semiconductor, featuring Microwire serial interface protocol and 2 MHz clock frequency. This device is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and production continuity. The part is housed in an 8-TSSOP package and operates across a 2.5V to 5.5V supply voltage range with -40°C to 85°C temperature specifications.

Key Parameters

Parameter	Value
Memory Type	Non-Volatile EEPROM
Memory Size	8Kbit
Memory Interface	Microwire
Clock Frequency	2 MHz
Memory Organization	1K x 8
Write Cycle Time	5ms
Voltage Supply Range	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	8-TSSOP
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the BR93C76-WDS6TP are identified based on the following critical parameters:

Memory capacity: 8Kbit (non-negotiable)
Interface protocol: Microwire (required for protocol compatibility)
Package type: 8-TSSOP or 8-MSOP (mechanically compatible)
Supply voltage compatibility: Minimum 2.5V operation or overlap with 2.5V ~ 5.5V range
Non-volatile EEPROM technology

The substitute parts listed below maintain these core electrical and mechanical specifications. Variations in clock frequency (3 MHz vs. 2 MHz), memory organization (512 x 16 vs. 1K x 8), write cycle time (2ms vs. 5ms), and operating temperature ranges represent functional improvements or extended specifications that do not prevent substitution in applications designed for the original part.

Parameter Comparison

Parameter	BR93C76-WDS6TP (Rohm)	93C76B-I/MS (Microchip)	93C76BT-E/MS (Microchip)	93C76BT-I/MS (Microchip)
Manufacturer	Rohm Semiconductor	Microchip Technology	Microchip Technology	Microchip Technology
Memory Size	8Kbit	8Kbit	8Kbit	8Kbit
Memory Organization	1K x 8	512 x 16	512 x 16	512 x 16
Memory Interface	Microwire	Microwire	Microwire	Microwire
Clock Frequency	2 MHz	3 MHz	3 MHz	3 MHz
Write Cycle Time	5ms	2ms	2ms	2ms
Voltage Supply Range	2.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C
Package Type	8-TSSOP	8-MSOP	8-MSOP	8-MSOP
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All three Microchip substitute parts (93C76B-I/MS, 93C76BT-E/MS, 93C76BT-I/MS) are active products with ROHS3 compliance and REACH unaffected status, providing long-term availability and regulatory alignment compared to the obsolete BR93C76-WDS6TP.

The 93C76BT-E/MS offers the widest operating temperature range (-40°C to 125°C), suitable for applications requiring extended thermal performance. The 93C76B-I/MS and 93C76BT-I/MS maintain the standard -40°C to 85°C range matching the original part.

All substitute parts feature improved write cycle time (2ms vs. 5ms) and higher clock frequency (3 MHz vs. 2 MHz), delivering faster memory operations. The shift from 1K x 8 to 512 x 16 memory organization does not affect functional compatibility for 8Kbit Microwire EEPROM applications.

Supply voltage compatibility requires verification: substitute parts operate at 4.5V ~ 5.5V, which does not include the original part's lower 2.5V specification. Applications requiring 2.5V operation must confirm voltage regulation or alternative sourcing.

Frequently Asked Questions (FAQ)

Q: Can the Microchip 93C76 series directly replace the Rohm BR93C76-WDS6TP?

A: Yes, for applications operating within the 4.5V ~ 5.5V supply range. The Microchip parts maintain 8Kbit capacity, Microwire interface protocol, and compatible 8-pin packaging. Applications requiring 2.5V operation require voltage compatibility verification.

Q: What is the difference between 1K x 8 and 512 x 16 memory organization?

A: Both configurations provide 8Kbit total capacity. The 1K x 8 organization addresses 1024 locations of 8 bits each, while 512 x 16 addresses 512 locations of 16 bits each. For Microwire protocol applications, this organizational difference does not affect functional substitution.

Q: Are 8-TSSOP and 8-MSOP packages mechanically compatible?

A: Both packages are 8-pin surface mount packages with 0.118" (3.00mm) width. Pin pitch and footprint compatibility must be confirmed against specific PCB design requirements, though both are standard 8-pin SOIC-variant packages.

Q: Why do substitute parts have faster write cycle times?

A: The 2ms write cycle time in Microchip parts represents improved memory technology compared to the original 5ms specification. This enhancement does not prevent substitution and provides performance benefits for write-intensive applications.

Q: Which substitute part should be selected for high-temperature applications?

A: The 93C76BT-E/MS supports -40°C to 125°C operation, extending the upper temperature limit by 40°C compared to the original -40°C to 85°C specification and the other substitute options.

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes, all three Microchip substitute parts carry ROHS3 compliance and REACH unaffected status, matching the regulatory profile of the original BR93C76-WDS6TP.

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