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Microchip Technology 93C76-E/SN
- Part No.:
- 93C76-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93C76-E/SN.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:210
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Product details
Overview
93C76-E/SN from Microchip Technology is an 8K-bit Microwire-compatible serial EEPROM with configurable x8/x16 organization via the ORG pin, 5.0V single-supply operation, 1 mA typical active current, and 1,000,000 erase/write cycles. It serves as nonvolatile parameter storage in embedded control systems requiring low-power, field-updatable memory.
For engineers reviewing the 93C76-E/SN datasheet, 93C76-E/SN pinout, 93C76-E/SN application, or 93C76-E/SN equivalent, this page delivers verified electrical specs, validated SOIC-8 pin functions, temperature-rated automotive-grade (-40°C to +125°C) operation, and confirmed alternatives for legacy design continuity and migration planning.
Technical Context
The 93C76-E/SN implements a 3-wire Microwire serial interface (CS, CLK, DI/DO) with self-timed erase/write cycles, automatic ERAL before WRAL, and hardware-based data protection during power-up/down. Its dual-memory organization (1024 × 8 or 512 × 16) is selected by the ORG pin state, and programming requires explicit EWEN/EWDS command sequencing.
It features a dedicated Program Enable (PE) pin for hardware write protection, DO pin status signaling (Ready/Busy), and sequential read capability under continuous CS high. All operations are synchronized to CLK rising edges, with timing validated across commercial, industrial, and automotive temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1024 × 8 or 512 × 16 configuration) |
| Supply voltage | +4.5V to +5.5V - supports standard 5V logic rails without regulation overhead |
| Endurance | 1,000,000 erase/write cycles - ensures long-term reliability in firmware update or calibration logging |
| Data retention | >200 years at 25°C - suitable for unattended, maintenance-free deployments |
| Operating temperature | -40°C to +125°C (Automotive E grade) - qualified for under-hood and engine-control applications |
| Max clock frequency | 2 MHz - enables fast parameter reads without CPU wait states in real-time systems |
| Standby current | 100 µA max - minimizes quiescent power in battery-backed or low-duty-cycle systems |
Pinout & Package
93C76-E/SN is housed in an 8-pin narrow-body SOIC package (150 mil width, JEDEC MS-012), with lead finish specified as matte tin (Pb-free). Pin 1 is marked with a dot or bevel; orientation follows standard SOIC conventions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; initiates Standby mode when deasserted |
| CLK | Serial Clock | Synchronizes all data transfers on rising edge; stops/resumes freely during transmission; not required during self-timed write |
| DI | Data Input | Accepts Start bit, opcode, address, and write data; shares bidirectional bus with DO only if externally managed |
| 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 signals and internal circuitry; must be low-impedance |
| PE | Program Enable | Hardware write lock: tied to VSS disables all erase/write; floating or VCC enables programming |
| VCC | Power Supply | +4.5V to +5.5V supply; powers internal logic and memory array; includes on-chip power-on reset |
| ORG | Organization Select | Connect to VCC for 512 × 16 mode; to VSS for 1024 × 8 mode; internal pull-up defaults to x16 |
Key Features
| Feature | Design Value |
|---|---|
| Configurable memory organization | Single device supports either 1024 × 8 or 512 × 16 layout via ORG pin-reduces BOM count across product variants |
| Hardware write protection | Dedicated PE pin allows board-level disable of all erase/write functions-prevents accidental corruption during service or debug |
| Self-timed programming | No external timing components needed; erase/write cycles complete autonomously (max 10 ms per word, 30 ms WRAL) |
| Power-on/off data protection | Internal circuitry inhibits programming below 1.4V-ensures memory integrity during brown-out or hot-swap events |
| Status signaling | DO pin provides real-time Ready/Busy feedback during erase/write-enables polling without fixed delays or timeouts |
Applications
| Industrial PLC Configuration Storage | Automotive Engine Control Unit Calibration |
|---|---|
Use Scenario: Storing I/O mapping, scaling factors, and alarm thresholds in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed infrequently but requiring guaranteed retention over 10+ years and immunity to power interruption. Use Value: 200-year data retention and -40°C to +85°C industrial rating ensure stable operation across harsh plant-floor thermal cycles and extended maintenance intervals. |
Use Scenario: Holding fuel trim tables, sensor offset corrections, and emission-related calibration constants in engine management systems subject to wide ambient temperature swings. IC Role / Device Role / Timing Role: Automotive-grade (E-temp) serial EEPROM interfaced to MCU via Microwire for secure, field-updatable calibration data storage. Use Value: -40°C to +125°C qualification and hardware PE pin enable safe reprogramming during vehicle diagnostics while preventing unintended writes during runtime. |
| Medical Device Setup Parameters | Consumer Appliance User Preferences |
Use Scenario: Retaining user-configured therapy settings, alarm limits, and device ID in portable diagnostic equipment powered by rechargeable batteries. IC Role / Device Role / Timing Role: Low-power (100 µA standby) serial memory storing safety-critical configuration that must survive >10,000 power cycles. Use Value: 1 mA active current and 1M endurance support frequent recalibration without wear-out concerns in battery-constrained handheld devices. |
Use Scenario: Saving cooking modes, timer presets, and display brightness preferences in smart ovens and washing machines with intermittent AC power. IC Role / Device Role / Timing Role: Cost-optimized, 5V-compatible EEPROM used for consumer-grade nonvolatile storage where write frequency is low but reliability is essential. Use Value: SOIC-8 package enables compact PCB layout; 8-pin PDIP/SOIC compatibility simplifies manufacturing and test across product generations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC76C-I/SN | Successor device with enhanced ESD (6 kV), tighter AC timing (TCKH min 250 ns), and same SOIC-8 footprint | Designed for new designs requiring improved robustness and longer lifecycle support; not drop-in due to different instruction set (no ERAL/WRAL) | Select for new designs needing extended longevity and higher noise immunity; requires firmware update to replace 93C76-E/SN |
| AT25080B-MAU-10 | SPI interface (4-wire), 8 Kbit, 2.5–5.5V supply, 20 MHz max clock, same endurance and retention specs | Requires SPI-capable host controller; lacks ORG pin configurability and Microwire compatibility | Choose when migrating to SPI architecture or consolidating with other Atmel SPI EEPROMs; board redesign needed for pinout and protocol |
Compared with 93C76-E/SN, the 93LC76C-I/SN offers superior ESD tolerance and updated timing but mandates firmware changes, while the AT25080B-MAU-10 shifts to SPI-providing higher speed at the cost of interface compatibility and requiring PCB layout revision.
Availability
93C76-E/SN is available at Aetrix Electronics and suitable for industrial control systems, automotive electronics, medical instrumentation, and consumer appliance designs requiring stable component supply and long-term obsolescence management.
Supply support for 93C76-E/SN 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, manufacturing, and sales operations.
The 93C76-E/SN belongs to Microchip's legacy Microwire EEPROM product line, engineered specifically for cost-sensitive, low-power embedded systems requiring simple 3-wire nonvolatile storage with automotive-grade reliability.
FAQ
What is the maximum clock frequency supported by the 93C76-E/SN?
The 93C76-E/SN supports a maximum clock frequency of 2 MHz across its full operating voltage range (+4.5V to +5.5V) and temperature range (-40°C to +125°C). This specification is validated per DS21132F-page 3 AC Characteristics table, ensuring reliable communication timing in real-time embedded hosts without added latency or setup constraints.
Does the 93C76-E/SN require external pull-up resistors on its DI or DO pins?
The 93C76-E/SN does not require external pull-ups on DI or DO for basic operation: DI is driven actively by the host, and DO is actively driven during read or status reporting. However, if DI and DO are shorted for single-wire mode, a pull-up may be needed to resolve bus contention during the dummy zero phase-per DS21132F-page 5 Section 2.2. The 93C76-E/SN itself contains no internal pull-ups on DI or DO.
How does the ORG pin affect memory addressing in the 93C76-E/SN?
When ORG is tied to VCC, the 93C76-E/SN configures as 512 × 16 (x16 mode), using 9 address bits (A8–A0); when tied to VSS, it configures as 1024 × 8 (x8 mode), using 10 address bits (A9–A0)-as defined in Tables 1-3 and 1-4 of DS21132F. The internal ORG pull-up defaults to x16 mode if left unconnected, directly determining instruction encoding and address width.
Is the 93C76-E/SN pin-compatible with the 93C86-E/SN?
No-the 93C76-E/SN and 93C86-E/SN share identical pinout and package (SOIC-8), but differ in memory size (8K vs. 16K) and instruction-set timing. While physically interchangeable, firmware must account for differing address widths (10-bit vs. 11-bit) and distinct erase/write cycle durations. DS21132F explicitly lists them as separate part numbers with independent instruction tables (Tables 1-3 through 1-6).
What is the function of the PE pin on the 93C76-E/SN, and how should it be used?
The PE (Program Enable) pin on the 93C76-E/SN controls hardware-level write permission: tying PE to VSS disables all erase/write operations permanently, while leaving it floating or connecting to VCC enables programming. An internal pull-up ensures default writability. This provides board-level security against accidental writes during testing, servicing, or voltage transients-distinct from software-based EWEN/EWDS commands.
93C76-E/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- 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:
- 2 MHz
- Write Cycle Time - Word, Page:
- 10ms
- 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-SOIC
93C76-E/SN FAQ
1.How can I place an order for 93C76-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C76-E/SN 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 93C76-E/SN reliable?
The price and inventory of 93C76-E/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93C76-E/SN is usually 5 days.
3.What payment methods are accepted for 93C76-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C76-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C76-E/SN?
93C76-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C76-E/SN 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 93C76-E/SN?
For technical support, including 93C76-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C76-E/SN requirements.
6.How does Aetrix verify that 93C76-E/SN is sourced from the original manufacturer or authorized distributors?
All 93C76-E/SN 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 93C76-E/SN meets industry standards.
7.What is the process for return or replacement of 93C76-E/SN?
All 93C76-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93C76-E/SN, 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 93C76-E/SN part is unused and in its original packaging.
Return procedure for 93C76-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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