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Microchip Technology 93C76C-I/P
- Part No.:
- 93C76C-I/P
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
93C76C-I/P.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:482
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Product details
Overview
93C76C-I/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 and >200-year data retention, and is rated for industrial temperature range (–40°C to +85°C). It is used in embedded systems for parameter storage, calibration data backup, and configuration memory where low-voltage operation and hardware-level write security are required.
For engineers reviewing the 93C76C-I/P datasheet, 93C76C-I/P pinout, 93C76C-I/P application, or 93C76C-I/P equivalent, key selection considerations include its dual-word-size flexibility (x8/x16), mandatory PE pin logic-high requirement for programming, VCC-dependent ERAL/WRAL timing (≥4.5V), Ready/Busy status polling via DO, and compatibility with legacy Microwire controllers in space-constrained industrial designs.
Technical Context
The 93C76C-I/P implements a synchronous serial interface with start-bit detection, opcode-driven command set (READ/EWEN/ERASE/ERAL/WRITE/WRAL/EWDS), and self-timed erase/write cycles including automatic ERAL before WRAL. Its internal logic requires CS high ≥250 ns between instructions and enforces power-on write disable (EWDS default state).
Memory access behavior depends on ORG pin level: ORG = VSS selects 1024 × 8-bit organization (22-clock READ); ORG = VCC selects 512 × 16-bit organization (29-clock READ). The PE pin must be held high during last data bit of WRITE/WRAL to enable programming; floating PE is prohibited.
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 V to 5.5 V - operation invalid below 4.5 V; POR threshold is 3.8 V |
| Clock Frequency | Up to 3 MHz at VCC ≥ 4.5 V - limits maximum serial throughput in controller firmware |
| Write Cycle Time | 2 ms (TWC) - defines minimum time between successive WRITE commands |
| Endurance | 1,000,000 erase/write cycles - specifies guaranteed reprogrammability under rated conditions |
| Data Retention | >200 years at 25°C - ensures long-term nonvolatile storage without refresh |
| Interface Protocol | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - requires no additional protocol translation in legacy MCU designs |
Pinout & Package
8-lead PDIP package (P suffix), body size 0.300" × 0.400", through-hole mounting. Pin 1 marked by notch or dot; pin 1 ID confirmed per Microchip DS21796M-page 17.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; deselects device into standby but does not abort ongoing write |
| CLK | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data; stoppable mid-sequence |
| DI | Data Input | Receives start bit, opcode, address, and write data; shares bus with DO only with external current-limiting resistor |
| 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 connected before VCC |
| ORG | Organization Control | Logic-low → 1024 × 8-bit mode; logic-high → 512 × 16-bit mode; must be fixed before first instruction |
| PE | Program Enable | Logic-high required to execute ERASE/WRITE/WRAL; logic-low permanently inhibits programming; must not float |
| VCC | Power Supply | 4.5–5.5 V only; internal POR circuit blocks writes until VCC ≥ 3.8 V |
Key Features
| Feature | Design Value |
|---|---|
| Configurable Word Size | Single hardware pin (ORG) selects between 8-bit and 16-bit data access, enabling flexible firmware alignment without changing part number |
| Hardware Write Protection | Dedicated PE pin provides physical gate to all erase/write operations-prevents accidental corruption even during firmware faults or brown-out |
| Self-Timed Erase/Write | No external timing control needed; internal logic manages auto-erase-before-write and cycle completion, simplifying host MCU driver code |
| Ready/Busy Polling | DO pin doubles as status indicator during programming-enables efficient wait-loop implementation without added interrupt lines or timers |
| Power-On Data Protection | Internal voltage detector disables writes until VCC stabilizes above 3.8 V, eliminating risk of partial writes during power ramp-up |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and user-adjusted trim values in a temperature/humidity transmitter. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed at power-up and during field recalibration; uses x8 mode for byte-aligned coefficient storage. Use Value: Enables field-serviceable calibration without firmware update; ORG pin fixed to VSS ensures consistent 8-bit addressing across production units. | Use Scenario: Retaining patient-specific therapy parameters and device usage logs in a portable infusion pump. IC Role / Device Role / Timing Role: Secure parameter store with hardware write lock (PE tied to controlled logic rail); accessed via Microwire-compatible MCU peripheral. Use Value: PE pin prevents runtime corruption of critical therapy settings; >200-year retention guarantees data integrity over full product lifecycle. |
| Automotive Body Control Module | POS Terminal Firmware Settings |
Use Scenario: Saving seat/mirror position presets and lighting profiles in a vehicle BCM operating across –40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-temp EEPROM interfaced to 8-bit MCU; uses x16 mode (ORG = VCC) to reduce instruction count for multi-byte writes. Use Value: Dual-word-size capability cuts I/O overhead by 50% vs. x8 mode for 16-bit parameter storage, improving boot-time configuration load speed. | Use Scenario: Storing merchant-specific tax rates, receipt formatting rules, and payment gateway keys in a retail POS terminal. IC Role / Device Role / Timing Role: Secure configuration vault; PE pin hardwired to system supervisor IC output to enforce write-lock during normal operation. Use Value: Hardware-enforced write protection eliminates risk of malicious or erroneous overwrite of financial configuration data during transaction processing. |
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/P | Wider VCC range (2.5–5.5 V); same pinout, ORG/PE functionality, and instruction set | Supports battery-powered or mixed-voltage systems where 4.5 V minimum cannot be guaranteed | Select when design operates below 4.5 V; verify POR threshold (1.5 V) and clock timing at lower VCC |
| AT25DF041A-SSH-T | Quad SPI interface, 4 Mbit density, no ORG/PE pins; SOIC-8 package | Higher throughput and density but requires SPI driver rewrite and lacks hardware write lock | Choose for bandwidth-critical logging; avoid if hardware write protection or Microwire compatibility is mandatory |
Compared with 93LC76C-I/P, the 93C76C-I/P trades wider supply flexibility for higher minimum VCC-making it optimal for stable 5 V rails with strict write-security needs. Versus AT25DF041A-SSH-T, it retains legacy Microwire support and dedicated PE/ORG pins at the cost of density and speed.
Availability
93C76C-I/P is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive body control modules requiring stable component supply, long-term data retention, and hardware-enforced write protection.
Supply support for 93C76C-I/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, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93Cxx EEPROM family was designed for cost-sensitive, low-power embedded systems needing reliable nonvolatile storage with minimal external components and direct Microwire compatibility.
FAQ
What is the minimum VCC required for reliable operation of the 93C76C-I/P?
The 93C76C-I/P requires VCC ≥ 4.5 V for full specification compliance. Its power-on reset (POR) circuit activates at 3.8 V, but all AC/DC parameters-including ERAL, WRAL, and TWC-are guaranteed only within the 4.5–5.5 V range. Operation below 4.5 V may result in undefined behavior or failure to complete erase/write cycles.
How does the ORG pin affect memory addressing in the 93C76C-I/P?
When ORG = VSS, the 93C76C-I/P operates in 1024 × 8-bit mode: addresses range from 000h to 3FFh, and READ/WRITE use 10-bit addresses. When ORG = VCC, it operates in 512 × 16-bit mode: addresses range from 000h to 1FFh, and instructions use 9-bit addresses. The ORG state must be stable before the first instruction.
Is the 93C76C-I/P pin-compatible with other devices in the 93XX76 family?
Yes-the 93C76C-I/P shares identical 8-lead PDIP pinout with all 93XX76x-I/P variants (e.g., 93C76A-I/P, 93LC76C-I/P). However, ORG and PE pins are no-ops on 'A' and 'B' versions, and VCC ranges differ; substituting without verifying electrical compatibility may cause functional failure.
What happens if the PE pin is left unconnected on the 93C76C-I/P?
The PE pin must never be left floating. An unconnected PE pin violates the absolute maximum ratings and may cause indeterminate programming behavior. To enable writes, tie PE to VCC; to permanently disable writes, tie PE to VSS. A pull-up or pull-down resistor (≤10 kΩ) is recommended for noise immunity.
Can the 93C76C-I/P be used in automotive applications requiring AEC-Q200 qualification?
No-the 93C76C-I/P is specified for Industrial temperature range (–40°C to +85°C) only. For automotive applications, Microchip offers the 93C76C-E/P variant ('E' grade), which is qualified to AEC-Q200 and rated for –40°C to +125°C. The 'I' suffix indicates industrial grade, not automotive.
93C76C-I/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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
93C76C-I/P FAQ
1.How can I place an order for 93C76C-I/P through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C76C-I/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-I/P reliable?
The price and inventory of 93C76C-I/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-I/P is usually 5 days.
3.What payment methods are accepted for 93C76C-I/P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C76C-I/P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C76C-I/P?
93C76C-I/P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C76C-I/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-I/P?
For technical support, including 93C76C-I/P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C76C-I/P requirements.
6.How does Aetrix verify that 93C76C-I/P is sourced from the original manufacturer or authorized distributors?
All 93C76C-I/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-I/P meets industry standards.
7.What is the process for return or replacement of 93C76C-I/P?
All 93C76C-I/P units undergo pre-shipment inspection (PSI). If there is an issue with 93C76C-I/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-I/P part is unused and in its original packaging.
Return procedure for 93C76C-I/P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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