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Microchip Technology 93C66C/S15K
- Part No.:
- 93C66C/S15K
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- Die
- Datasheet:
-
93C66C/S15K.pdf
- Description:
- IC EEPROM 4KBIT MICROWIRE DIE
- Quantity:
- Payment:
- Shipping:
Inventory:2,166
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Product details
Overview
93C66C/S15K from Microchip Technology Inc. is a 4 Kbit Microwire-compatible serial EEPROM with configurable 8-/16-bit word organization via the ORG pin, 4.5–5.5 V supply range, industrial/automotive temperature support (−40°C to +125°C), and 1 million erase/write cycles. It serves as nonvolatile configuration storage in microcontroller-based systems requiring low-power, reliable data retention.
For engineers reviewing the 93C66C/S15K datasheet, 93C66C/S15K pinout, 93C66C/S15K application, or 93C66C/S15K equivalent, key selection factors include ORG-pin-configurable word size, 2 ms write cycle time, Ready/Busy status signaling on DO, self-timed erase/write with auto-erase, and compatibility with legacy Microwire controllers.
Technical Context
The 93C66C/S15K implements a synchronous 3-wire serial interface (CS, CLK, DI/DO) with start-bit detection and opcode-driven command execution. Memory organization is dynamically selected by the ORG pin: logic high enables 256 × 16-bit mode; logic low enables 512 × 8-bit mode.
It supports full memory operations including byte/word WRITE, ERASE, ERAL (Erase All), WRAL (Write All), and EWEN/EWDS for write protection. Programming cycles are self-timed (2 ms for 93C versions), initiated by the rising edge of CLK on the final data bit, and monitored via DO pin status polling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 4 Kbit (512 × 8 or 256 × 16, selectable via ORG pin) |
| VCC range | 4.5 V to 5.5 V - ensures stable operation in 5 V systems with margin against brownout |
| Write cycle time | 2 ms - defines minimum interval between successive write commands |
| Endurance | 1,000,000 erase/write cycles - supports long-term field calibration or logging use cases |
| Data retention | 200 years at 25°C - guarantees data integrity over product lifetime without refresh |
| Temperature range | −40°C to +125°C - qualified for automotive under-hood and industrial control environments |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - interoperable with legacy MCU peripherals |
Pinout & Package
93C66C/S15K is packaged in an 8-lead SOIC (SN) with Matte Tin (Pb-free) finish. Pin 1 is CS; pin 2 is CLK; pin 3 is DI; pin 4 is DO; pin 5 is VSS; pin 6 is ORG; pin 7 is NC; pin 8 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable: must be held ≥250 ns low between instructions; initiates standby when low during programming |
| CLK | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data; stopped mid-transfer without error |
| DI | Data Input | Receives start bit, instruction opcodes, addresses, and write data; shares bidirectional bus with DO in some layouts |
| DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z on CS falling edge |
| VSS | Ground | Reference for all I/O and internal circuitry; must be low-impedance connection |
| ORG | Organization select | Logic high → 256 × 16-bit mode; logic low → 512 × 8-bit mode; must be externally biased |
| NC | No internal connection | Unbonded pin; no electrical function; may be left floating or tied to ground per layout requirements |
| VCC | Power supply | 4.5–5.5 V input; internal POR triggers at 3.8 V; powers all logic and memory array |
Key Features
| Feature | Design Value |
|---|---|
| ORG-pin word-size selection | Enables single BOM to support both 8-bit and 16-bit host interfaces without firmware change |
| Self-timed erase/write | Eliminates need for external timing control or software delay loops - reduces MCU overhead |
| Automatic ERAL before WRAL | Ensures full-array write reliability without separate erase command sequence |
| Ready/Busy status on DO | Allows real-time polling instead of fixed delays - improves system responsiveness and throughput |
| EWEN/EWDS write protection | Hardware-enforced lock prevents accidental writes during power transitions or noise events |
Applications
| Motor Control Configuration | Industrial Sensor Calibration |
|---|---|
Use Scenario: Storing motor phase timing offsets, current limits, and fault thresholds in BLDC driver modules. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during boot and runtime parameter updates. Use Value: Enables field-updatable tuning without reprogramming MCU flash; retains settings across 125°C thermal cycles. | Use Scenario: Recording factory-trimmed gain/offset coefficients for analog sensor front-ends in process analyzers. IC Role / Device Role / Timing Role: Calibration data repository with guaranteed 200-year retention and 1M-cycle endurance. Use Value: Eliminates manual potentiometer adjustment; supports automated calibration during production test. |
| Automotive Body Controller | Medical Device Settings Storage |
Use Scenario: Saving user preferences (window position, mirror angle, seat memory) in automotive door modules. IC Role / Device Role / Timing Role: Low-power serial EEPROM interfaced to 8-bit MCU via Microwire peripheral. Use Value: Operates reliably at −40°C to +125°C; withstands automotive load-dump transients due to built-in power-on/off protection. | Use Scenario: Storing FDA-mandated device configuration, usage counters, and audit logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant nonvolatile memory with write-disable capability (EWDS). Use Value: Meets IEC 62304 data integrity requirements; supports traceability via 1M-cycle endurance for usage logging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC66C-I/SN | VCC range 2.5–5.5 V; supports wider voltage headroom and lower-voltage operation | Better suited for mixed-voltage systems with 3.3 V logic; not rated for 125°C automotive use | Select when system operates below 4.5 V or requires extended temperature margin below 125°C |
| AT25040B-MAU-10 | SPI interface (4-wire), 512 × 8 organization only, 1.8–5.5 V supply, 20 MHz max clock | Requires SPI-capable host; lacks ORG pin flexibility and Microwire compatibility | Choose for higher-speed SPI systems where ORG configurability is unnecessary |
Compared with 93LC66C-I/SN, the 93C66C/S15K offers tighter VCC regulation (4.5–5.5 V) and full automotive temp rating, while AT25040B-MAU-10 trades Microwire compatibility for faster SPI throughput and broader voltage range - neither is pin-compatible, but both serve overlapping configuration-storage roles.
Availability
93C66C/S15K is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor calibration, and medical device configuration storage requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 93C66C/S15K 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 components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93C66C/S15K belongs to Microchip's legacy 93XX series of Microwire-compatible EEPROMs, designed specifically for cost-sensitive, low-power embedded systems requiring simple, robust nonvolatile storage with minimal MCU resource usage.
FAQ
What is the function of the ORG pin on the 93C66C/S15K?
The ORG pin on the 93C66C/S15K selects memory organization: logic high configures 256 × 16-bit mode; logic low configures 512 × 8-bit mode. It must be externally biased to a valid logic level (VCC or VSS) at power-up and cannot float. This feature allows one 93C66C/S15K part number to serve dual-host-interface designs without hardware revision.
Does the 93C66C/S15K require external pull-up resistors on its I/O lines?
The 93C66C/S15K does not require external pull-ups on CS, CLK, or DI for basic operation, as internal weak pull-downs exist. However, DO is open-drain and requires an external pull-up (typically 4.7 kΩ to VCC) to ensure valid logic-high levels during Read and Ready/Busy status reporting. Pull-ups are mandatory for reliable DO functionality.
How is write protection implemented on the 93C66C/S15K?
Write protection on the 93C66C/S15K is enforced via the EWEN (Erase/Write Enable) and EWDS (Erase/Write Disable) instructions. The device powers up in EWDS mode, blocking all erase/write operations until EWEN is issued. After any write, issuing EWDS restores protection - a critical safeguard against spurious writes during power transients or EMI events.
What is the maximum clock frequency supported by the 93C66C/S15K?
The 93C66C/S15K supports a maximum clock frequency of 3 MHz when VCC is 4.5–5.5 V. At lower voltages (not applicable to this part), timing de-rates: 2 MHz for 2.5–4.5 V, and 1 MHz for 1.8–2.5 V. Since the 93C66C/S15K is specified only for 4.5–5.5 V, its operational limit is strictly 3 MHz.
Can the 93C66C/S15K be used in automotive applications?
Yes, the 93C66C/S15K is qualified for automotive applications with its extended temperature range of −40°C to +125°C and AEC-Q100 stress testing compliance (as documented in Microchip's DS21795E). Its 4.5–5.5 V VCC range aligns with automotive 5 V rail stability requirements, and built-in power-on/off data protection ensures reliability during ignition cycling.
93C66C/S15K Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- Die
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 4Kbit
- Memory Organization:
- 512 x 8, 256 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Die
93C66C/S15K FAQ
1.How can I place an order for 93C66C/S15K through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C66C/S15K 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 93C66C/S15K reliable?
The price and inventory of 93C66C/S15K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93C66C/S15K is usually 5 days.
3.What payment methods are accepted for 93C66C/S15K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C66C/S15K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C66C/S15K?
93C66C/S15K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C66C/S15K 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 93C66C/S15K?
For technical support, including 93C66C/S15K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C66C/S15K requirements.
6.How does Aetrix verify that 93C66C/S15K is sourced from the original manufacturer or authorized distributors?
All 93C66C/S15K 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 93C66C/S15K meets industry standards.
7.What is the process for return or replacement of 93C66C/S15K?
All 93C66C/S15K units undergo pre-shipment inspection (PSI). If there is an issue with 93C66C/S15K, 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 93C66C/S15K part is unused and in its original packaging.
Return procedure for 93C66C/S15K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93C66C/S15K Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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