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Microchip Technology 93C76C-E/P
- Part No.:
- 93C76C-E/P
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
93C76C-E/P.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,208
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Product details
Overview
93C76C-E/P from Microchip Technology Inc. is an 8Kbit, 4.5–5.5V serial EEPROM with configurable 8-/16-bit word organization via the ORG pin and hardware write protection via the PE pin. It supports Microwire-compatible 3-wire serial interface (CS/CLK/DI/DO), delivers 1M erase/write cycles, >200-year data retention, and operates across –40°C to +125°C for automotive applications.
For engineers reviewing the 93C76C-E/P datasheet, 93C76C-E/P pinout, 93C76C-E/P application, or 93C76C-E/P equivalent, this page provides verified functional specifications, validated pin roles, automotive-grade timing parameters (TWC = 2 ms, VCC ≥4.5V), and real-world use context for embedded configuration storage in harsh-environment control systems.
Technical Context
The 93C76C-E/P implements a synchronous Microwire-compatible serial interface with start-bit detection, opcode-driven command execution (READ/EWEN/ERASE/ERAL/WRAL), and Ready/Busy status polling via DO. Its dual-word-size architecture (x8/x16) is selected by static logic level on ORG, while PE must be held high to enable programming.
Self-timed erase/write cycles include automatic ERAL before WRAL, power-on/off data protection, and voltage-dependent operation: VCC detect threshold is 3.8V, and ERAL/WRAL require VCC ≥4.5V. All instructions are clocked on CLK rising edges, with CS low time (TCSL ≥250 ns) mandatory between commands.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1024 × 8 or 512 × 16, selectable via ORG pin) |
| VCC range | 4.5–5.5 V - ensures compatibility with 5V automotive microcontrollers and prevents operation below safe threshold (VPOR = 3.8 V) |
| Endurance | 1,000,000 erase/write cycles - supports frequent firmware parameter updates in engine control units |
| Data retention | >200 years at 25°C - guarantees long-term calibration storage without refresh |
| Write cycle time | 2 ms (TWC) - enables fast field-updatable configuration writes in real-time systems |
| Operating temp | –40°C to +125°C (Automotive E grade) - qualified for under-hood and transmission control modules |
| Interface | 3-wire Microwire (CS/CLK/DI/DO) - minimal GPIO usage, compatible with legacy MCU peripherals |
Pinout & Package
8-lead PDIP package (E/P suffix), Pb-free Matte Tin finish, through-hole mounting. Pin 1 marked by laser dot; pin 1 ID corner defined per JEDEC MS-001.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable: device enters standby when low; minimum TCSL = 250 ns required between commands |
| CLK | Serial Clock | Rising-edge synchronized I/O; stoppable mid-sequence; no clocks needed during self-timed write |
| DI | Data Input | Accepts start bit, opcode, address, and data; must be stable before first CLK rising edge after CS high |
| DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge |
| VSS | Ground | Reference for all I/O and internal circuitry; must be connected before VCC |
| ORG | Organization select | High = 16-bit mode (512 words), Low = 8-bit mode (1024 words); must be statically tied, not floated |
| PE | Program Enable | High = write enabled; Low = full array write-protection; mandatory high before last data bit of WRITE/WRAL |
| VCC | Power supply | 4.5–5.5 V only; VPOR = 3.8 V prevents operation during brown-out; decoupling capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| ORG pin configuration | Selects x8 or x16 memory mapping at power-up-enables single BOM for dual-data-width systems |
| Hardware write protection | PE pin disables all erase/write operations when grounded-prevents accidental corruption during system debug or reset |
| Auto-erase before write | Internal ERAL executed automatically before WRAL-eliminates need for separate erase command in bulk update sequences |
| Ready/Busy polling | DO pin signals programming status-allows non-blocking firmware waits without timer overhead or interrupts |
| Power-on data protection | Internal circuitry inhibits all operations until VCC ≥3.8 V-ensures reliable boot-time EEPROM access |
Applications
| Engine Control Unit (ECU) | Transmission Control Module (TCM) |
|---|---|
Use Scenario: Storing adaptive fuel trim values, knock sensor learning offsets, and cold-start enrichment tables subject to frequent recalibration during vehicle operation. IC Role / Device Role / Timing Role: Nonvolatile configuration register providing byte- or word-accessible storage with deterministic 2 ms write latency and automotive temperature resilience. Use Value: Enables field-updatable calibration without external backup power or complex wear-leveling firmware-reduces ECU BOM cost vs. FRAM/NVRAM alternatives. | Use Scenario: Holding gear-shifting strategy parameters, clutch pressure profiles, and fault history logs that persist across ignition cycles and thermal extremes. IC Role / Device Role / Timing Role: Serial EEPROM interfacing directly with 5V automotive MCUs via Microwire, supporting concurrent read/write with hardware write lockout. Use Value: PE pin allows runtime disable of writes during critical shift events-prevents EEPROM corruption during power transients common in transmission solenoid switching. |
| Body Control Module (BCM) | Advanced Driver Assistance System (ADAS) Camera ECU |
Use Scenario: Retaining door lock/unlock preferences, mirror position memory, and lighting timeout settings across battery disconnect events. IC Role / Device Role / Timing Role: Low-pin-count, 3-wire serial memory with 1M endurance-supports daily user adjustments over 10+ year vehicle life. Use Value: ORG pin enables flexible 8-bit storage for simple settings or 16-bit for extended diagnostics-reducing firmware complexity versus fixed-width alternatives. | Use Scenario: Storing camera lens calibration coefficients, image sensor gain tables, and firmware patch metadata requiring guaranteed retention at 125°C ambient. IC Role / Device Role / Timing Role: Automotive-grade EEPROM with >200-year data retention at elevated temperature-used for factory-programmed calibration data that must survive 15+ years. Use Value: VCC = 4.5–5.5 V range matches ADAS domain controller rail; WRAL command enables one-shot factory calibration upload without host-side erase management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC76C-E/P | Lower VCC range (2.5–5.5 V), same pinout and instruction set; lacks 4.5–5.5 V optimization and higher noise immunity of 93C76C | Targeted at mixed-voltage systems (e.g., 3.3V logic with 5V peripherals); not qualified for pure 5V automotive rails | Select 93LC76C-E/P only if system VCC may dip below 4.5 V; otherwise 93C76C-E/P provides tighter voltage margin and automotive robustness. |
| AT25DF041A-SSH-T | 4 Mbit SPI flash (not EEPROM); sector erase, no byte-write; requires external write-enable sequence; different command set and timing | Higher density for firmware storage; unsuitable for frequent small-parameter updates due to erase granularity and latency | Choose AT25DF041A-SSH-T only for code storage; 93C76C-E/P remains superior for dynamic configuration registers requiring true byte/word random access and 1M-cycle endurance. |
Compared with 93LC76C-E/P, the 93C76C-E/P offers higher VCC noise margin and automotive-specific qualification; compared with AT25DF041A-SSH-T, it provides true EEPROM functionality-byte-level writes, no erase-before-write, and guaranteed 1M cycles-critical for real-time parameter logging.
Availability
93C76C-E/P is available at Aetrix Electronics and suitable for automotive control units, engine management systems, and body electronics requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for 93C76C-E/P 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, and Flash-IP solutions, serving automotive, industrial, and consumer markets with high-reliability silicon and development tools.
The 93Cxx EEPROM family was designed specifically for automotive and industrial applications demanding robust nonvolatile storage with hardware write protection, wide temperature operation, and Microwire compatibility for legacy MCU integration.
FAQ
What is the function of the ORG pin on the 93C76C-E/P?
The ORG pin on the 93C76C-E/P selects memory word size: logic high configures 16-bit organization (512 words), logic low configures 8-bit organization (1024 words). It must be statically tied to VCC or VSS-not floated-and determines instruction addressing and data width for READ/WRITE/ERASE commands. This feature is exclusive to 'C' variants like the 93C76C-E/P.
How does the PE pin protect memory on the 93C76C-E/P?
The PE (Program Enable) pin on the 93C76C-E/P must be held high to allow any erase or write operation; grounding PE disables all programming functions, including EWEN, ERASE, and WRITE. This hardware lock prevents accidental corruption during power-up, debug, or system faults. The 93C76C-E/P requires PE = high prior to the final data bit of each WRITE or WRAL command.
What is the maximum clock frequency supported by the 93C76C-E/P at 5V?
The 93C76C-E/P supports a maximum clock frequency of 3 MHz when VCC is between 4.5V and 5.5V, as specified in Table 1-2 (Param. A1, FCLK). At lower voltages (2.5–4.5V), max frequency drops to 2 MHz; below 2.5V, it is 1 MHz. Timing margins (TCKH, TCKL, TDIS) scale accordingly to ensure reliable communication.
Can the 93C76C-E/P perform sequential reads, and how is it enabled?
Yes, the 93C76C-E/P supports sequential read: after issuing a READ command with an initial address, holding CS high causes the internal address counter to auto-increment, outputting consecutive memory locations on DO. Each subsequent byte/word is clocked out on CLK rising edges without reissuing the READ opcode-reducing host MCU overhead for bulk data retrieval.
What is the purpose of the ERAL and WRAL commands in the 93C76C-E/P instruction set?
The ERAL (Erase All) command erases the entire 8Kbit array to logic '1' in one self-timed cycle (TEC = 6 ms), while WRAL (Write All) writes identical data to all locations after automatic ERAL (TWL = 15 ms). Both require VCC ≥4.5V and EWEN state. These commands simplify factory calibration loading or secure memory wipe-eliminating need for software loops over individual addresses.
93C76C-E/P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 8Kbit
- Memory Organization:
- 1K x 8, 512 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
93C76C-E/P FAQ
1.How can I place an order for 93C76C-E/P through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C76C-E/P 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 93C76C-E/P reliable?
The price and inventory of 93C76C-E/P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93C76C-E/P is usually 5 days.
3.What payment methods are accepted for 93C76C-E/P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C76C-E/P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C76C-E/P?
93C76C-E/P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C76C-E/P 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 93C76C-E/P?
For technical support, including 93C76C-E/P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C76C-E/P requirements.
6.How does Aetrix verify that 93C76C-E/P is sourced from the original manufacturer or authorized distributors?
All 93C76C-E/P 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 93C76C-E/P meets industry standards.
7.What is the process for return or replacement of 93C76C-E/P?
All 93C76C-E/P units undergo pre-shipment inspection (PSI). If there is an issue with 93C76C-E/P, 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 93C76C-E/P part is unused and in its original packaging.
Return procedure for 93C76C-E/P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93C76C-E/P Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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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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