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Microchip Technology 93LC86C-E/ST
- Part No.:
- 93LC86C-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
93LC86C-E/ST.pdf
- Description:
- IC EEPROM 16KBIT MIC WIRE 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,422
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Product details
Overview
93LC86C-E/ST from Microchip Technology Inc. is a 16 Kbit Microwire-compatible serial EEPROM with configurable 8-/16-bit word organization via the ORG pin, program enable (PE) write protection, and industrial/automotive temperature support (−40°C to +125°C). It operates from 2.5V to 5.5V, delivers 1 million erase/write cycles, and retains data for >200 years - used in embedded system configuration storage, sensor calibration memory, and power-management parameter retention.
For engineers reviewing the 93LC86C-E/ST datasheet, 93LC86C-E/ST pinout, 93LC86C-E/ST application, or 93LC86C-E/ST equivalent, key selection considerations include VCC range compatibility (2.5–5.5 V), ORG/PE pin control logic, Ready/Busy status polling via DO, and Microwire protocol timing compliance across temperature grades.
Technical Context
The 93LC86C-E/ST implements a synchronous 3-wire Microwire interface (CS, CLK, DI/DO) with self-timed erase/write cycles and automatic ERAL before WRAL. Its dual-word-size architecture is controlled by the ORG pin: logic high selects 1024 × 16-bit mode; logic low selects 2048 × 8-bit mode.
Write operations require PE = VCC and are enabled only after an EWEN command; the device powers up in EWDS (write-disabled) state. Status is reported on DO during programming: low = busy, high = ready - requiring CS reassertion ≥250 ns after TCSL to sample.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 16 Kbit (2048 × 8 or 1024 × 16, selectable via ORG pin) |
| VCC operating range | 2.5 V to 5.5 V - supports wide-input industrial and automotive power rails |
| Endurance | 1,000,000 erase/write cycles - enables long-term field recalibration without wear-out risk |
| Data retention | >200 years at 25°C - ensures firmware/config integrity over product lifetime |
| Max clock frequency | 3 MHz at VCC ≥4.5 V - defines maximum serial transaction throughput |
| Temperature grade | Automotive (E): −40°C to +125°C - qualified for under-hood and ADAS subsystems |
| Write cycle time | 5 ms (erase/write), 6 ms (ERAL), 15 ms (WRAL) - determines minimum latency for bulk updates |
Pinout & Package
8-lead TSSOP package (ST suffix), Pb-free matte tin finish, 3.0 mm × 4.4 mm body, 0.65 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions to reset internal logic |
| CLK | Serial Clock | Positive-edge synchronous timing for opcode/address/data; stoppable mid-sequence |
| DI | Data Input | Accepts Start bit, instruction opcodes, addresses, and write data; shares bus with DO when resistor-limited |
| DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z on CS falling edge |
| VSS | Ground | Reference return path for all I/O and core logic; must be low-impedance |
| ORG | Organization Select | Logic high → 1024 × 16-bit mode; logic low → 2048 × 8-bit mode; must be statically tied |
| PE | Program Enable | Logic high required to permit EWEN/WRITE/WRAL; tie low to permanently disable writes |
| VCC | Power Supply | 2.5–5.5 V supply; internal POR triggers at ~1.5 V; voltage detect prevents corruption during brownout |
Key Features
| Feature | Design Value |
|---|---|
| Configurable word size | Single hardware pin (ORG) selects 8-bit or 16-bit addressing - eliminates need for multiple part numbers |
| Hardware write protection | Dedicated PE pin enables system-level lockout of memory writes - critical for safety-critical firmware parameters |
| Auto-erase before write | Self-timed erase integrated into every WRITE/WRAL cycle - guarantees data consistency without host intervention |
| Ready/Busy status signaling | DO pin doubles as status indicator during programming - enables polling instead of fixed delays |
| Power-on/off data protection | Internal circuitry inhibits writes below VCC threshold (~1.5 V) - prevents corruption during power ramp-up/down |
| Microwire protocol compliance | Industry-standard 3-wire interface with Start-bit detection and dummy-zero read preamble - ensures interoperability with legacy controllers |
Applications
| Industrial Sensor Calibration | Automotive Powertrain Control |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during boot and runtime calibration routines via Microwire interface. Use Value: Enables field-replaceable sensor modules with unique calibration data preserved across power cycles and firmware updates. | Use Scenario: Retaining adaptive learning values (e.g., idle air control trim, fuel injector latency compensation) in engine control units. IC Role / Device Role / Timing Role: Automotive-grade EEPROM interfaced to MCU via dedicated SPI-like Microwire peripheral; accessed during key-off save and key-on restore sequences. Use Value: Supports ASIL-B–aligned parameter persistence with guaranteed 125°C operation and 200-year data retention. |
| Medical Device Configuration | Smart Energy Metering |
Use Scenario: Holding user-configurable alarm thresholds, measurement ranges, and audit log metadata in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, write-protected memory block accessed only after PE activation and EWEN command during service mode. Use Value: Prevents accidental overwrite of safety-critical settings while allowing authorized field technicians to update configurations. | Use Scenario: Storing tariff schedules, metering constants, and tamper-event logs in DIN-rail electricity meters deployed in outdoor substations. IC Role / Device Role / Timing Role: Industrial-temp EEPROM with ERAL/WRAL support for periodic full-table updates synchronized to utility billing cycles. Use Value: Eliminates need for external backup capacitors or supercapacitors due to fast 5 ms write cycles and robust brownout immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC86C-I/ST | Same silicon, Industrial temp grade (−40°C to +85°C); identical pinout, timing, and feature set | Not rated for automotive under-hood environments; lower cost where extended temperature not required | Select for cost-sensitive industrial controls where ambient temperature stays ≤85°C |
| AT25128B-MAHL-T | 128 Kbit SPI EEPROM; no ORG/PE pins; uses standard SPI (4-wire), not Microwire; 2.5–5.5 V, −40°C to +125°C | Requires different MCU peripheral (SPI vs Microwire); larger capacity but lacks hardware write-protection pin | Choose when migrating to SPI-based platforms or needing >16 Kbit capacity; verify protocol compatibility |
Compared with 93LC86C-I/ST, the 93LC86C-E/ST adds automotive qualification without changing footprint or software interface; versus AT25128B-MAHL-T, it trades capacity and SPI ubiquity for Microwire simplicity and dedicated hardware write-locking.
Availability
93LC86C-E/ST is available at Aetrix Electronics and suitable for automotive powertrain systems, industrial sensor nodes, and medical diagnostic devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 93LC86C-E/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 microcontroller, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93LCxx family was designed specifically for low-power, pin-efficient serial configuration memory in resource-constrained embedded systems - emphasizing reliability, protocol simplicity (Microwire), and robustness across harsh environments.
FAQ
What is the function of the ORG pin on the 93LC86C-E/ST?
The ORG pin on the 93LC86C-E/ST selects memory organization: tied to VCC it configures the device as 1024 × 16-bit; tied to VSS it configures as 2048 × 8-bit. This hardware-selectable mode eliminates firmware branching for word-size handling and is mandatory for correct address decoding. The 93LC86C-E/ST requires ORG to be statically biased - floating is not permitted.
How does the PE pin protect memory on the 93LC86C-E/ST?
The PE (Program Enable) pin on the 93LC86C-E/ST must be driven high to allow any erase or write operation - including EWEN, ERASE, WRITE, and WRAL. When PE is low, all programming functions are inhibited regardless of EWEN state. This hardware lock provides fail-safe write protection independent of software state, making it essential for safeguarding critical calibration data in automotive and medical applications using the 93LC86C-E/ST.
What is the minimum VCC required for reliable operation of the 93LC86C-E/ST?
The 93LC86C-E/ST incorporates internal power-on reset (POR) circuitry that inhibits all operations until VCC rises above ~1.5 V. However, functional operation - including valid reads, writes, and status polling - requires VCC ≥2.5 V per its specified operating range. Below 2.5 V, the device may enter undefined states; sustained operation below this threshold risks data corruption and violates the 93LC86C-E/ST's automotive qualification.
Can the 93LC86C-E/ST be used with a shared DI/DO bus?
Yes, the 93LC86C-E/ST supports single-line bidirectional bus operation between DI and DO, but a current-limiting resistor (typically 10 kΩ) must be placed between them to prevent bus conflict during the dummy-zero read preamble. Without this resistor, undefined voltage levels may occur if address bit A0 is high, potentially causing communication errors or excessive current draw in the 93LC86C-E/ST interface.
What is the purpose of the ERAL and WRAL commands in the 93LC86C-E/ST instruction set?
The ERAL (Erase All) command on the 93LC86C-E/ST erases the entire 16 Kbit array to 0xFF in one self-timed cycle (6 ms typical at VCC ≥4.5 V). WRAL (Write All) performs an automatic ERAL followed by writing the same 8- or 16-bit data value to every location (15 ms typical). Both require EWEN to be active and VCC ≥4.5 V - they are used for factory initialization, secure data wiping, or rapid firmware parameter table updates in the 93LC86C-E/ST.
93LC86C-E/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
93LC86C-E/ST FAQ
1.How can I place an order for 93LC86C-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC86C-E/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 93LC86C-E/ST reliable?
The price and inventory of 93LC86C-E/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC86C-E/ST is usually 5 days.
3.What payment methods are accepted for 93LC86C-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC86C-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC86C-E/ST?
93LC86C-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC86C-E/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 93LC86C-E/ST?
For technical support, including 93LC86C-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC86C-E/ST requirements.
6.How does Aetrix verify that 93LC86C-E/ST is sourced from the original manufacturer or authorized distributors?
All 93LC86C-E/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 93LC86C-E/ST meets industry standards.
7.What is the process for return or replacement of 93LC86C-E/ST?
All 93LC86C-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 93LC86C-E/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 93LC86C-E/ST part is unused and in its original packaging.
Return procedure for 93LC86C-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93LC86C-E/ST Tags
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