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93LC86C-I/ST
Microchip Technology
IC EEPROM 16KBIT MIC WIRE 8TSSOP
3298 Pcs New Original In Stock
EEPROM Memory IC 16Kbit Microwire 3 MHz 8-TSSOP
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5.0 / 5.0
- (489 Ratings)
93LC86C-I/ST
Product Overview
1231266
DiGi Electronics Part Number
93LC86C-I/ST-DGManufacturer
Microchip Technology
93LC86C-I/ST
Description
IC EEPROM 16KBIT MIC WIRE 8TSSOPInventory
3298 Pcs New Original In Stock
EEPROM Memory IC 16Kbit Microwire 3 MHz 8-TSSOP
Quantity
Minimum 1
Minimum 1
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93LC86C-I/ST Technical Specifications
Category
Memory, Memory
Packaging
Tube
Series
-
Product Status
Active
DiGi-Electronics Programmable
Not Verified
Memory Type
Non-Volatile
Memory Format
EEPROM
Technology
EEPROM
Memory Size
16Kbit
Memory Organization
2K x 8, 1K x 16
Memory Interface
Microwire
Clock Frequency
3 MHz
Write Cycle Time - Word, Page
5ms
Voltage - Supply
2.5V ~ 5.5V
Operating Temperature
-40°C ~ 85°C (TA)
Mounting Type
Surface Mount
Package / Case
8-TSSOP (0.173", 4.40mm Width)
Supplier Device Package
8-TSSOP
Base Product Number
93LC86
Datasheet & Documents
HTML Datasheet
93LC86C-I/ST-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.32.0051
Additional Information
Other Names
93LC86C-I/ST-NDR
Standard Package
100
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Der Service bei DiGi Electronics ist stets kompetent und sehr kundenorientiert.
Dec 02, 2025
迅速な物流と明確な価格情報に非常に満足しています。
Dec 02, 2025
The transparency and speed of their shipping process build strong trust with their customers.
Dec 02, 2025
Their quick logistics makes shopping a seamless experience, and their prices are fantastic.
Dec 02, 2025
Delivery was faster than expected, and the after-sales support was always prompt and helpful.
Dec 02, 2025
Whenever we need help after buying, their customer service team is responsive and knowledgeable, making troubleshooting hassle-free.
Dec 02, 2025
We value their wide range because it helps us fulfill diverse educational needs efficiently.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when using the 93LC86C-I/ST in a mixed-voltage system with 3.3V and 5V logic levels?
When integrating the 93LC86C-I/ST in mixed-voltage systems, a primary risk is signal compatibility due to its 2.5V to 5.5V supply range. While the 93LC86C-I/ST can tolerate 5V inputs when powered at 3.3V, ensure that all timing budgets (particularly setup and hold times) are maintained under worst-case conditions. Use level shifting if driving from a 3.3V controller to avoid marginal signaling at VIL/VIH thresholds. Additionally, avoid floating control lines (CS, SK, DI) during power-up; tie them to VCC or GND via pull-up/down resistors to prevent accidental writes during startup transients, which can corrupt data in the 93LC86C-I/ST.
How does the 93LC86C-I/ST compare to the FM93C56A in terms of drop-in replaceability and endurance in industrial temperature applications?
The 93LC86C-I/ST and FM93C56A both support Microwire interface and operate across -40°C to 85°C, but are not direct pin-to-pin or command-set equivalents. The 93LC86C-I/ST offers 16Kbit (configurable as 2Kx8 or 1Kx16), while the FM93C56A provides 1Kx16 or 2Kx8—same density but different addressing logic. Command opcodes differ between manufacturers; rewrite firmware logic if replacing FM93C56A with 93LC86C-I/ST. Also, verify write cycle timing: the 93LC86C-I/ST has a typical 5ms page write time, similar to the FM93C56A, but Microchip's reliability data shows 1M write cycles versus 100K on some FM variants, giving the 93LC86C-I/ST better endurance in high-update industrial applications.
What PCB layout considerations minimize timing errors when interfacing the 93LC86C-I/ST at 3 MHz clock frequency?
To maintain signal integrity at the 93LC86C-I/ST's maximum 3 MHz clock rate, keep trace lengths short—ideally under 2 inches—and avoid routing near noisy signals like switching regulators or clock lines. Use a continuous ground plane beneath the 93LC86C-I/ST and minimize stubs on the SK, DI, and DO lines. Terminate the SK line with series damping resistors (22–33 Ω) close to the driver if ringing is observed. Also, decouple the VCC pin with a 0.1 μF ceramic capacitor placed within 5 mm of the package to reduce supply bounce during active writes, ensuring reliable operation of the 93LC86C-I/ST in high-speed Microwire communication.
Can the 93LC86C-I/ST retain data when powered down in harsh environments, and what are the reliability risks over 10+ year deployments?
Yes, the 93LC86C-I/ST retains data for up to 200 years at 85°C and 100 years at 55°C due to its EEPROM technology, making it suitable for long-term storage in industrial and automotive systems. However, reliability risks include cumulative write endurance exhaustion and exposure to temperature cycling, which can accelerate oxide layer degradation. To mitigate risks, implement wear leveling in firmware even for low-write applications, and avoid frequent page rewrites. Also, confirm that the operating voltage remains within 2.5V–5.5V during write cycles—undervoltage conditions (e.g., during brown-out) can corrupt the 93LC86C-I/ST memory; use a supervisor IC or software checks to prevent writes during power-up/down phases.
What are the trade-offs between using the 93LC86C-I/ST in 1K x 16 vs 2K x 8 memory organization during system integration?
Selecting between 1K x 16 and 2K x 8 modes in the 93LC86C-I/ST impacts address management and bus compatibility. In 1K x 16 mode, you access 16-bit words with fewer addresses but require a 16-bit data path in firmware logic—even though the Microwire interface is serial, the opcode and address structure change. In 2K x 8 mode, you get byte-level access ideal for 8-bit microcontrollers but double the address depth. The configuration is hardware-selectable via the ORG pin, so ensure correct pull-up or pull-down on this pin at power-up. Mismatched mode selection can lead to address overflow or data misalignment, so validate the 93LC86C-I/ST's mode at initialization and lock it in the design to prevent field failures.
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93LC86C-I/ST CAD Models
Microchip Technology 93LC86C-I/ST PCB symbols & footprints
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