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Microchip Technology 93LC86CT-I/ST
- Part No.:
- 93LC86CT-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
93LC86CT-I/ST.pdf
- Description:
- IC EEPROM 16KBIT MIC WIRE 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,884
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Product details
Overview
The 93LC86CT-I/ST from Microchip Technology Inc. is a 16 Kbit Microwire-compatible serial EEPROM with 8-bit organization, operating over 2.5–5.5 V, supporting Industrial temperature range (−40°C to +85°C), and housed in an 8-lead TSSOP package. It features self-timed erase/write cycles, 1,000,000 endurance cycles, and >200-year data retention - used for nonvolatile configuration storage in microcontroller-based systems.
For engineers reviewing the 93LC86CT-I/ST datasheet, 93LC86CT-I/ST pinout, 93LC86CT-I/ST application, or 93LC86CT-I/ST equivalent, key selection criteria include VCC range compatibility, ORG/PE pin absence (confirming fixed 8-bit mode), TSSOP footprint constraints, Microwire interface timing margins at 2.5 V, and write-protection strategy without hardware PE control.
Technical Context
This device implements a synchronous 3-wire Microwire interface (CS, CLK, DI/DO) with no ORG or PE pins - confirming it is a dedicated 8-bit 'A' variant (not 'C'). It uses a start-bit protocol followed by opcode, address (11-bit for 2048 × 8), and data, with DO providing both read data and Ready/Busy status via polling.
Internal architecture includes auto-erase-before-write, ERAL (Erase All) and WRAL (Write All) commands, power-on/off data protection, and voltage-detect circuitry (VPOR = 1.5 V typical). Write cycle time is 5 ms (TWC), with clock frequency up to 3 MHz at VCC ≥ 4.5 V and down to 1 MHz at VCC = 2.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 16 Kbit (2048 × 8) - fixed 8-bit organization, no ORG pin required |
| VCC range | 2.5 V to 5.5 V - supports wide supply rails including 3.3 V and 5 V systems |
| Endurance | 1,000,000 erase/write cycles - enables frequent firmware/config updates in field-deployed devices |
| Data retention | >200 years at 25°C - ensures long-term reliability in unpowered storage |
| Write cycle time | 5 ms max - defines minimum interval between successive writes; impacts real-time logging latency |
| Max clock frequency | 3 MHz at VCC ≥ 4.5 V - sets upper bound on serial transaction throughput |
| Temp range | −40°C to +85°C (Industrial) - validated for use in industrial control and automotive cabin modules |
| Interface | Microwire 3-wire serial (CS/CLK/DI/DO) - requires only four MCU GPIOs; no SPI mode or SS pin needed |
Pinout & Package
8-lead TSSOP (ST) package, 3.0 mm × 4.4 mm body, 0.65 mm pitch, exposed pad optional. Pin 1 marked by laser dot; pin 1 is CS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; controls Standby entry/exit |
| CLK | Serial Clock | Rising-edge synchronized I/O; stoppable mid-transfer; timing critical for TCKH/TCKL compliance |
| DI | Data Input | Receives Start bit, opcode (2-bit), address (11-bit), and data (8-bit); no internal pull-up |
| DO | Data Output / Status | Tri-state output; delivers read data or Ready/Busy (low = busy); high-Z when CS low |
| VSS | Ground | Reference for all I/O and internal logic; must be low-impedance connection |
| VCC | Power Supply | 2.5–5.5 V input; internal POR triggers at ~1.5 V; decoupling capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control; reduces MCU firmware overhead during programming |
| Automatic ERAL before WRAL | Ensures full-array write integrity without separate erase command; simplifies bulk update sequences |
| Ready/Busy polling via DO | Enables non-blocking operation - MCU can perform other tasks while waiting for write completion |
| Power-on/off data protection | Hardware-level inhibition of writes when VCC drops below 1.5 V; prevents corruption during brownout |
| Pb-free & RoHS compliant | Meets global environmental regulations; Matte Tin finish ensures solderability and wire-bond compatibility |
Applications
| Industrial Sensor Calibration | Embedded System Configuration |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Nonvolatile configuration memory holding trim values accessed at boot; read-only during runtime. Use Value: Enables field-replaceable sensors without recalibration; leverages 2048 × 8 capacity for multi-sensor profiles. | Use Scenario: Retaining user-defined settings (network IP, display brightness, alarm thresholds) across power cycles in HMI panels. IC Role / Device Role / Timing Role: Serial configuration store interfaced directly to MCU GPIOs; accessed via Microwire during initialization. Use Value: Eliminates battery-backed RAM; 1M endurance supports daily parameter edits over 10+ years. |
| Automotive Body Control Module | Medical Device Usage Logs |
Use Scenario: Recording door lock actuation history and mirror position presets in 12 V automotive cabins. IC Role / Device Role / Timing Role: Low-voltage EEPROM operating from regulated 3.3 V rail; withstands −40°C to +85°C ambient. Use Value: Industrial temp grade ensures reliability under hood-adjacent mounting; 2.5 V min VCC supports degraded supply conditions. | Use Scenario: Logging timestamped therapy session counts and error events in portable infusion pumps. IC Role / Device Role / Timing Role: Tamper-resistant event logger; write-protected except during authorized service mode. Use Value: >200-year data retention guarantees audit trail integrity over device lifetime; 5 ms write time enables rapid log commits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC86AT-I/ST | Same 2048 × 8 organization, identical TSSOP-8 package, but rated for Industrial temp only (no E-grade option) | No automotive qualification; lacks AEC-Q100 alignment for under-hood use | Select when cost sensitivity outweighs extended temp need and automotive compliance is not required |
| AT25080B-SSHL-T | SPI interface (4-wire), 1024 × 8 organization, 2.5–5.5 V, SOIC-8; no Ready/Busy pin - relies on WIP flag polling | Requires SPI peripheral instead of GPIO-bitbanged Microwire; smaller memory depth | Choose if existing design uses SPI peripherals and firmware already supports Atmel's instruction set |
Compared with 93LC86AT-I/ST, the 93LC86CT-I/ST offers identical pinout and electrical behavior but belongs to the 'C' family - however, since this specific part has no ORG/PE pins, it functions identically to the 'A' version. Versus AT25080B-SSHL-T, it trades SPI compatibility for simpler 3-wire control and built-in status signaling, reducing MCU resource load.
Availability
The 93LC86CT-I/ST is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and medical device manufacturing requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for 93LC86CT-I/ST includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology Inc. is a leading provider of microcontrollers, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93LC86CT-I/ST belongs to Microchip's legacy 93XX serial EEPROM product line, designed specifically for low-power, pin-efficient nonvolatile storage in space-constrained embedded systems where Microwire compatibility and robust data integrity are essential.
FAQ
What is the memory organization of the 93LC86CT-I/ST?
The 93LC86CT-I/ST is a fixed 2048 × 8-bit (16 Kbit) EEPROM with no ORG pin - confirming it is an 'A'-type device. Unlike 'C' variants, it does not support x16 mode or external word-size selection. Its address space spans 11 bits (0x000–0x7FF), and all read/write operations transfer 8-bit data words.
Does the 93LC86CT-I/ST have Program Enable (PE) or ORG pins?
No, the 93LC86CT-I/ST does not include PE or ORG pins. Per the Device Selection Table and Pin Function Table, those pins are exclusive to 'C' versions (e.g., 93LC86C). This part is a 'T'-suffixed TSSOP variant of the 'A' series, meaning write-enable is always active and word size is permanently 8-bit.
What is the maximum clock frequency supported by the 93LC86CT-I/ST at 3.3 V?
At VCC = 3.3 V, the 93LC86CT-I/ST supports a maximum clock frequency of 2 MHz. This is derived from Table 1-2 (AC Characteristics): for 2.5 V ≤ VCC < 4.5 V, FCLK max = 2 MHz. Exceeding this violates setup/hold timing (e.g., TDIS, TCKH) and risks communication failure.
How is write protection implemented on the 93LC86CT-I/ST?
Since the 93LC86CT-I/ST lacks a PE pin, hardware write protection is not available. Instead, software-controlled Erase/Write Disable (EWDS) and Enable (EWEN) commands provide logical protection. The device powers up in EWDS mode; an EWEN instruction must precede any erase or write operation, and issuing EWDS afterward relocks the array.
Can the 93LC86CT-I/ST be used in automotive applications requiring AEC-Q100 qualification?
No - the 93LC86CT-I/ST carries the 'I' (Industrial) temperature grade (−40°C to +85°C) and is not AEC-Q100 qualified. For automotive use, Microchip offers the 'E' grade (e.g., 93LC86BT-E/ST), which extends to +125°C and undergoes additional stress testing aligned with AEC-Q100 Rev G requirements.
93LC86CT-I/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- 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
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
93LC86CT-I/ST FAQ
1.How can I place an order for 93LC86CT-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC86CT-I/ST on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 93LC86CT-I/ST reliable?
The price and inventory of 93LC86CT-I/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC86CT-I/ST is usually 5 days.
3.What payment methods are accepted for 93LC86CT-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC86CT-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC86CT-I/ST?
93LC86CT-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC86CT-I/ST order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 93LC86CT-I/ST?
For technical support, including 93LC86CT-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC86CT-I/ST requirements.
6.How does Aetrix verify that 93LC86CT-I/ST is sourced from the original manufacturer or authorized distributors?
All 93LC86CT-I/ST products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 93LC86CT-I/ST meets industry standards.
7.What is the process for return or replacement of 93LC86CT-I/ST?
All 93LC86CT-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 93LC86CT-I/ST, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 93LC86CT-I/ST part is unused and in its original packaging.
Return procedure for 93LC86CT-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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