AT49LW080-33JX-T Equivalent & Substitute Parts

Part Overview

The AT49LW080-33JX-T is an 8Mbit parallel FLASH memory IC manufactured by Microchip Technology, designed for firmware storage and data retention applications. This component operates at 33 MHz with a 32-PLCC package configuration and supports 3V to 3.6V supply voltage across an industrial temperature range of 0°C to 85°C. The part is classified as obsolete, making equivalent substitutes necessary for ongoing system support and new design implementations. Substitute parts must maintain electrical compatibility across memory capacity, interface type, voltage specifications, and thermal operating range.

Key Parameters

Parameter	Value
Memory Size	8Mbit
Memory Organization	1M x 8
Memory Interface	Parallel
Clock Frequency	33 MHz
Voltage Supply Range	3V ~ 3.6V
Operating Temperature	0°C ~ 85°C
Package Type	32-PLCC (J-Lead)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the AT49LW080-33JX-T is determined by strict alignment across the following critical parameters:

Memory Capacity: 8Mbit (1M x 8 organization)
Interface Type: Parallel interface
Clock Frequency: 33 MHz operation
Supply Voltage: 3V to 3.6V compatibility
Operating Temperature Range: 0°C to 85°C
Package Configuration: 32-PLCC (J-Lead) surface mount
Compliance Standards: ROHS3 compliance and EAR99 classification

All identified substitute parts meet these core electrical and mechanical requirements. Differences in write cycle time and access time do not affect substitution eligibility, as these parameters represent performance enhancements rather than compatibility constraints. Product status transitions from obsolete to active availability improve supply chain reliability for the substitute options.

Parameter Comparison

Parameter	AT49LW080-33JX-T	SST49LF008A-33-4C-NHE	SST49LF008A-33-4C-NHE-T	SST49LF080A-33-4C-NHE-T
Manufacturer	Microchip Technology	SST Silicon Storage Technology, Inc	Microchip Technology	Microchip Technology
Memory Size	8Mbit	8Mbit	8Mbit	8Mbit
Memory Organization	1M x 8	1M x 8	1M x 8	1M x 8
Memory Interface	Parallel	Parallel	Parallel	Parallel
Clock Frequency	33 MHz	33 MHz	33 MHz	33 MHz
Write Cycle Time	300µs	20µs	20µs	20µs
Access Time	Not specified	120 ns	120 ns	120 ns
Voltage Supply	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V
Operating Temperature	0°C ~ 85°C	0°C ~ 85°C	0°C ~ 85°C	0°C ~ 85°C
Package Type	32-PLCC (J-Lead)	32-LCC (J-Lead)	32-PLCC (J-Lead)	32-PLCC (J-Lead)
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	2 (1 Year)	Not specified	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

SST49LF008A-33-4C-NHE-T is the primary substitute option. This part is manufactured by Microchip Technology with active product status, ROHS3 compliance certification, and verified programmability through DiGi-Electronics. The MSL rating of 3 (168 hours) requires controlled storage conditions but remains suitable for standard manufacturing environments. This variant provides the most direct compatibility path with documented compliance certifications.

SST49LF080A-33-4C-NHE-T serves as an alternative substitute with identical electrical specifications and active product status. This part is supplied in cut tape packaging and maintains ROHS3 compliance and EAR99 classification. Selection between SST49LF008A-33-4C-NHE-T and SST49LF080A-33-4C-NHE-T depends on packaging format requirements and inventory availability.

SST49LF008A-33-4C-NHE is available from SST Silicon Storage Technology, Inc with active product status. This option lacks specified RoHS and MSL documentation in the provided data, making it suitable only when compliance certifications are not contractually required.

All three substitutes eliminate obsolescence risk through active manufacturing status while maintaining full electrical and mechanical compatibility with the original AT49LW080-33JX-T specification.

Frequently Asked Questions (FAQ)

Q: Can SST49LF008A-33-4C-NHE-T directly replace AT49LW080-33JX-T in existing designs?

A: Yes. Both parts share identical memory capacity (8Mbit), organization (1M x 8), parallel interface, 33 MHz clock frequency, 3V to 3.6V supply voltage, 0°C to 85°C operating temperature range, and 32-PLCC surface mount package configuration. Electrical and mechanical compatibility is complete.

Q: What is the significance of the write cycle time difference between AT49LW080-33JX-T (300µs) and substitute parts (20µs)?

A: The substitute parts offer faster write cycle performance. This represents an improvement in operational speed and does not create compatibility issues. Systems designed for the original 300µs specification will function correctly with the faster 20µs write cycle time.

Q: Are all substitute parts ROHS3 compliant?

A: SST49LF008A-33-4C-NHE-T and SST49LF080A-33-4C-NHE-T are explicitly ROHS3 compliant. SST49LF008A-33-4C-NHE does not have specified RoHS documentation in the provided data. Compliance verification is required before selection if RoHS certification is a contractual requirement.

Q: What packaging format differences exist among the substitute options?

A: SST49LF008A-33-4C-NHE-T and SST49LF080A-33-4C-NHE-T are supplied in standard packaging. SST49LF080A-33-4C-NHE-T is available in cut tape format. All three maintain the 32-PLCC (J-Lead) package configuration required for PCB compatibility.

Q: Why is the AT49LW080-33JX-T classified as obsolete?

A: Obsolescence indicates the manufacturer has discontinued active production. Substitute parts with active product status ensure continued availability for system maintenance, repairs, and new production runs.

Q: Does MSL rating affect substitution eligibility?

A: MSL rating affects storage and handling procedures but does not impact electrical or mechanical substitution eligibility. The original part has MSL 2 (1 Year), while substitutes have MSL 3 (168 Hours). MSL 3 requires more controlled storage conditions but remains compatible with standard manufacturing environments.

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