Request Quote
(Ships tomorrow)
25LC320A-E/ST EEPROM Memory IC Equivalent & Substitute Parts
Part Overview
The 25LC320A-E/ST is a 32Kbit Serial Peripheral Interface (SPI) EEPROM memory IC manufactured by Microchip Technology in an 8-TSSOP surface mount package. This non-volatile memory device operates across a 2.5V to 5.5V supply voltage range with a 10 MHz clock frequency and is classified as an active product with ROHS3 compliance. Equivalent and substitute parts are identified based on matching memory capacity, interface protocol, package type, and electrical operating parameters to ensure functional interchangeability in circuit applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Memory Size | 32Kbit |
| Memory Organization | 4K x 8 |
| Memory Interface | SPI |
| Clock Frequency | 10 MHz |
| Voltage Supply Range | 2.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 125°C |
| Write Cycle Time | 5ms |
| Package Type | 8-TSSOP (0.173", 4.40mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility for the 25LC320A-E/ST is determined by the following criteria:
Primary Matching Parameters:
- Memory capacity: 32Kbit
- Memory organization: 4K x 8
- Interface protocol: SPI
- Package type: 8-TSSOP surface mount
- Memory format: EEPROM non-volatile
Secondary Compatibility Parameters:
- Clock frequency: 10 MHz or higher (backward compatible)
- Supply voltage range: Must encompass or exceed 2.5V ~ 5.5V
- Operating temperature: Must support -40°C minimum and 125°C maximum, or narrower ranges within this specification
- Write cycle time: 5ms or faster
Substitute parts are grouped into two categories: direct equivalents matching all primary parameters, and compatible alternatives with enhanced specifications (higher clock frequency, extended temperature range, or automotive qualification) that maintain functional compatibility.
Parameter Comparison
| Part Number | Manufacturer | Memory Size | Clock Frequency | Voltage Supply | Operating Temperature | Write Cycle Time | Package | Grade |
|---|---|---|---|---|---|---|---|---|
| 25LC320A-E/ST | Microchip Technology | 32Kbit | 10 MHz | 2.5V ~ 5.5V | -40°C ~ 125°C | 5ms | 8-TSSOP | Standard |
| AT25320B-XHL-B | Microchip Technology | 32Kbit | 20 MHz | 1.8V ~ 5.5V | -40°C ~ 85°C | 5ms | 8-TSSOP | Standard |
| AT25320B-XHL-T | Microchip Technology | 32Kbit | 20 MHz | 1.8V ~ 5.5V | -40°C ~ 85°C | 5ms | 8-TSSOP | Standard |
| BR25H320FVT-2CE2 | Rohm Semiconductor | 32Kbit | 10 MHz | 2.5V ~ 5.5V | -40°C ~ 125°C | 4ms | 8-TSSOP-B | Automotive (AEC-Q100) |
| BR25S320FVT-WE2 | Rohm Semiconductor | 32Kbit | 20 MHz | 1.7V ~ 5.5V | -40°C ~ 85°C | 5ms | 8-TSSOP-B | Standard |
| CAT25320YI-GT3 | onsemi | 32Kbit | 10 MHz | 1.8V ~ 5.5V | -40°C ~ 85°C | 5ms | 8-TSSOP | Standard |
| CAV25320YE-GT3 | onsemi | 32Kbit | 10 MHz | 2.5V ~ 5.5V | -40°C ~ 125°C | 5ms | 8-TSSOP | Automotive (AEC-Q100) |
| M95320-DFDW6TP | STMicroelectronics | 32Kbit | 20 MHz | 1.7V ~ 5.5V | -40°C ~ 85°C | 5ms | 8-TSSOP | Standard |
| M95320-DRDW3TP/K | STMicroelectronics | 32Kbit | 20 MHz | 1.8V ~ 5.5V | -40°C ~ 125°C | 4ms | 8-TSSOP | Automotive (AEC-Q100) |
| M95320-DWDW4TP/K | STMicroelectronics | 32Kbit | 10 MHz | 2.5V ~ 5.5V | -40°C ~ 145°C | 4ms | 8-TSSOP | Automotive (AEC-Q100) |
| M95320-RDW6TP | STMicroelectronics | 32Kbit | 20 MHz | 1.8V ~ 5.5V | -40°C ~ 85°C | 5ms | 8-TSSOP | Standard |
Engineering Selection Recommendations
Direct Equivalents (Identical Specifications): M95320-DWDW4TP/K from STMicroelectronics matches the 25LC320A-E/ST across all primary parameters with identical 10 MHz clock frequency, 2.5V ~ 5.5V supply range, and -40°C ~ 125°C operating temperature. This part carries automotive AEC-Q100 qualification and offers a 4ms write cycle time, providing enhanced performance within the same electrical envelope.
Compatible Substitutes with Enhanced Clock Frequency (20 MHz): AT25320B-XHL-B, AT25320B-XHL-T, BR25S320FVT-WE2, M95320-DFDW6TP, M95320-DRDW3TP/K, and M95320-RDW6TP all operate at 20 MHz, doubling the clock frequency while maintaining SPI interface compatibility and 32Kbit capacity. These parts are functionally compatible in applications where the 25LC320A-E/ST operates below maximum clock speed. Operating temperature ranges vary; M95320-DRDW3TP/K extends to 125°C and includes automotive qualification.
Compatible Substitutes with Extended Temperature Range: CAV25320YE-GT3 from onsemi and M95320-DWDW4TP/K from STMicroelectronics both support the full -40°C ~ 125°C temperature specification of the 25LC320A-E/ST and carry automotive AEC-Q100 qualification. M95320-DWDW4TP/K additionally extends to -40°C ~ 145°C for high-temperature applications.
Package Variant Consideration: BR25H320FVT-2CE2 and BR25S320FVT-WE2 from Rohm Semiconductor use 8-TSSOP-B package variant. While mechanically compatible with standard 8-TSSOP footprints, design verification is required for PCB layout compatibility.
Frequently Asked Questions (FAQ)
Q: Can I use a 20 MHz substitute part in place of the 25LC320A-E/ST? A: Yes. Parts operating at 20 MHz (AT25320B-XHL-B, AT25320B-XHL-T, BR25S320FVT-WE2, M95320-DFDW6TP, M95320-DRDW3TP/K, M95320-RDW6TP) are functionally compatible. The 25LC320A-E/ST specifies 10 MHz maximum clock frequency; higher-frequency parts operate at reduced speed without performance degradation. Verify that your circuit design does not depend on specific timing characteristics of the original part.
Q: What is the difference between 8-TSSOP and 8-TSSOP-B packages? A: Both packages share identical 0.173" width and 4.40mm dimensions and are mechanically compatible with standard 8-TSSOP PCB footprints. The -B designation indicates a variant from Rohm Semiconductor. Consult the specific datasheet for any minor dimensional or pin configuration differences before PCB layout finalization.
Q: Are automotive-grade parts (AEC-Q100) compatible with standard industrial applications? A: Yes. Automotive-qualified parts (BR25H320FVT-2CE2, CAV25320YE-GT3, M95320-DRDW3TP/K, M95320-DWDW4TP/K) meet or exceed industrial specifications and are fully compatible with standard applications. These parts undergo additional qualification testing and typically offer extended temperature ranges and improved reliability margins.
Q: Which substitute part best matches the 25LC320A-E/ST specifications? A: M95320-DWDW4TP/K from STMicroelectronics provides the closest match with identical 10 MHz clock frequency, 2.5V ~ 5.5V supply range, and -40°C ~ 125°C operating temperature. It includes automotive AEC-Q100 qualification and faster 4ms write cycle time.
Q: Can I substitute a part with a narrower operating temperature range? A: Substitution is possible only if your application operates within the narrower temperature range. The 25LC320A-E/ST specifies -40°C ~ 125°C; parts with -40°C ~ 85°C ranges (AT25320B-XHL-B, AT25320B-XHL-T, BR25S320FVT-WE2, CAT25320YI-GT3, M95320-DFDW6TP, M95320-RDW6TP) are suitable for applications not exceeding 85°C ambient temperature.
Q: What supply voltage range is required for compatibility? A: The 25LC320A-E/ST operates from 2.5V ~ 5.5V. Substitute parts with wider ranges (1.7V ~ 5.5V or 1.8V ~ 5.5V) are compatible. Parts with narrower ranges must encompass your circuit's supply voltage specification. Verify that your power supply design falls within the selected part's voltage specification.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts