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Microchip Technology 93C86CT-E/ST
- Part No.:
- 93C86CT-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
93C86CT-E/ST.pdf
- Description:
- IC EEPROM 16KBIT MIC WIRE 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,949
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Product details
Overview
93C86CT-E/ST from Microchip Technology Inc. is a 16 Kbit Microwire-compatible serial EEPROM with 8-bit organization, 4.5–5.5 V supply range, and industrial/automotive temperature support (–40°C to +125°C). It features self-timed erase/write cycles, automatic ERAL before WRAL, power-on/off data protection, and Ready/Busy status signaling via DO pin - used in automotive body control modules for calibration storage.
For engineers reviewing the 93C86CT-E/ST datasheet, 93C86CT-E/ST pinout, 93C86CT-E/ST application, or 93C86CT-E/ST equivalent, key selection criteria include its 2 ms program cycle time, 1 M endurance cycles, 200-year data retention, 3-wire serial interface compatibility, and TSSOP-8 package suitability for space-constrained automotive PCBs.
Technical Context
This device implements a synchronous 3-wire Microwire interface with CS, CLK, and DI/DO lines. It uses internal auto-erase prior to write and supports sequential read, ERAL (Erase All), and WRAL (Write All) commands - all initiated by rising-edge clocked opcodes and addresses.
The 93C86CT-E/ST operates exclusively in fixed 8-bit organization (no ORG pin), lacks PE and ORG pins (unlike 'C' variants), and relies on EWEN/EWDS commands for write enable/disable control. Its VCC detect threshold is 3.8 V, ensuring reliable power-on reset behavior in 5 V automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 16 Kbit (2048 × 8-bit organization) |
| VCC operating range | 4.5 V to 5.5 V - compatible with standard 5 V automotive rails |
| Endurance | 1,000,000 erase/write cycles - suitable for frequent calibration updates |
| Data retention | Greater than 200 years at +85°C - ensures lifetime data integrity in vehicle ECUs |
| Program cycle time | 2 ms max - enables fast firmware parameter updates without system stall |
| Temperature range | –40°C to +125°C (Automotive E-grade) - qualified for under-hood deployment |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - minimal GPIO usage on microcontrollers |
Pinout & Package
93C86CT-E/ST is housed in an 8-pin TSSOP (Thin Shrink Small Outline Package) with 0.65 mm pitch, JEDEC MO-153 compliant, and Pb-free Matte Tin finish. The package measures 4.4 mm × 3.0 mm × 1.1 mm and is optimized for reflow soldering and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable; must be held low ≥250 ns between instructions to reset internal logic |
| 2 (CLK) | Serial Clock | Synchronizes opcode/address/data transfer on rising edge; stoppable mid-sequence |
| 3 (DI) | Data Input | Accepts Start bit, opcodes (e.g., 10 for READ), addresses, and write data |
| 4 (DO) | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z when CS is low |
| 5 (VSS) | Ground | Reference return path for all I/O and internal circuitry |
| 6 (VCC) | Power Supply | 4.5–5.5 V supply; internal POR triggers at 3.8 V typical |
| 7, 8 | No Connect | Not bonded - no external connection required |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control - simplifies host MCU firmware |
| Automatic ERAL before WRAL | Guarantees full-array readiness before bulk write - prevents partial writes |
| Power-on/off data protection | Hardware-level lockout below 3.8 V VCC - prevents corruption during brown-out |
| Ready/Busy status on DO | Enables polling-based write completion detection without interrupt overhead |
| Industry-standard Microwire interface | Direct compatibility with legacy 8051, PIC, and ARM-based controllers using existing drivers |
Applications
| Automotive Body Control Module | Industrial PLC Configuration Storage |
|---|---|
Use Scenario: Storing door lock actuator calibration offsets and seat position memory across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with guaranteed write integrity during battery voltage transients. Use Value: Maintains user preferences and safety-critical settings without backup capacitor or supercapacitor support. |
Use Scenario: Retaining I/O mapping, PID tuning constants, and alarm thresholds after power loss in factory automation controllers. IC Role / Device Role / Timing Role: Serial configuration EEPROM interfaced to Cortex-M4 host via GPIO-banged Microwire. Use Value: Enables field-upgradable logic without requiring flash reprogramming or JTAG access. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Parameters |
Use Scenario: Holding flow rate calibration coefficients and dose history logs subject to regulatory audit requirements. IC Role / Device Role / Timing Role: Tamper-resistant, long-retention memory for FDA 21 CFR Part 11 compliance. Use Value: Meets 200-year data retention mandate for Class II medical device lifecycle documentation. |
Use Scenario: Storing tariff schedules, meter ID, and cryptographic keys in ANSI C12.22-compliant smart meters. IC Role / Device Role / Timing Role: Secure, low-power serial EEPROM accessed during meter boot and firmware update. Use Value: Supports AES-128 key storage with hardware write-protection via EWDS command sequence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC86BT-E/ST | Same 16 Kbit size but 16-bit organization (x16), 2.5–5.5 V VCC range, no PE/ORG pins | Better suited for 16-bit microcontroller interfaces; lower VCC min enables mixed-voltage designs | Select if host MCU natively supports 16-bit word reads/writes and requires 2.5 V operation |
| AT25128B-MAHL-T | SPI interface (4-wire), 128 Kbit capacity, 1.8–5.5 V, 5 ms write cycle, AEC-Q100 Grade 1 | Higher density and broader voltage range, but requires additional CS and SO pins | Choose for SPI-based platforms needing >16 Kbit or extended low-voltage operation down to 1.8 V |
Compared with 93C86CT-E/ST, the 93LC86BT-E/ST offers native 16-bit access at lower VCC, while AT25128B-MAHL-T provides SPI compatibility and higher density at the cost of extra pin count and longer write latency - making 93C86CT-E/ST optimal for cost-sensitive, 5 V, 8-bit Microwire designs.
Availability
93C86CT-E/ST is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and medical device manufacturing requiring stable component supply with full AEC-Q100 traceability and long-term lifecycle assurance.
Supply support for 93C86CT-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 microcontrollers, analog devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93Cxx series was designed specifically for automotive and industrial applications demanding high reliability, extended temperature operation, and proven Microwire interoperability - targeting ECU calibration, sensor compensation, and configuration storage where pin count and protocol simplicity are critical.
FAQ
What is the maximum clock frequency supported by the 93C86CT-E/ST?
The 93C86CT-E/ST supports up to 3 MHz clock frequency when VCC is 4.5–5.5 V. This allows high-speed communication with host microcontrollers while maintaining timing margin for robust operation in noisy automotive environments. The device meets all AC timing specifications including TCKH ≥200 ns and TCKL ≥100 ns at this rate.
Does the 93C86CT-E/ST have an ORG or PE pin?
No, the 93C86CT-E/ST does not include ORG or PE pins. As a 'B'-suffix variant in the 93C86 family, it is fixed at 16-bit organization and lacks hardware write-protection - write enable/disable is managed solely through EWEN and EWDS commands. This distinguishes it from the 'C' variants like 93C86CT-E/ST which include both pins.
How is write protection implemented on the 93C86CT-E/ST?
Write protection on the 93C86CT-E/ST is implemented exclusively via command sequencing: the device powers up in EWDS (Erase/Write Disable) mode, and any ERASE or WRITE operation requires a preceding EWEN instruction. After programming, issuing EWDS restores protection. No external pin-based locking is available on this variant.
What package type is used for the 93C86CT-E/ST?
The 93C86CT-E/ST uses an 8-pin TSSOP (Thin Shrink Small Outline Package) with 4.4 mm × 3.0 mm body, 0.65 mm lead pitch, and Pb-free Matte Tin finish. It is JEDEC MO-153 compliant and marked "C86B" with temperature grade "E" and date code per Microchip's standard marking convention.
Is the 93C86CT-E/ST qualified for automotive applications?
Yes, the 93C86CT-E/ST is qualified for automotive use with an operating temperature range of –40°C to +125°C (E-grade) and compliance with AEC-Q100 stress test requirements. Its 3.8 V VCC detect threshold, power-on data protection, and 200-year retention meet stringent automotive reliability standards for body control and powertrain subsystems.
93C86CT-E/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:
- 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:
- 2ms
- Access Time:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
93C86CT-E/ST FAQ
1.How can I place an order for 93C86CT-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C86CT-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 93C86CT-E/ST reliable?
The price and inventory of 93C86CT-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 93C86CT-E/ST is usually 5 days.
3.What payment methods are accepted for 93C86CT-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C86CT-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C86CT-E/ST?
93C86CT-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C86CT-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 93C86CT-E/ST?
For technical support, including 93C86CT-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C86CT-E/ST requirements.
6.How does Aetrix verify that 93C86CT-E/ST is sourced from the original manufacturer or authorized distributors?
All 93C86CT-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 93C86CT-E/ST meets industry standards.
7.What is the process for return or replacement of 93C86CT-E/ST?
All 93C86CT-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 93C86CT-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 93C86CT-E/ST part is unused and in its original packaging.
Return procedure for 93C86CT-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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