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Microchip Technology 93C76CT-I/SN
- Part No.:
- 93C76CT-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93C76CT-I/SN.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,782
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Product details
Overview
93C76CT-I/SN from Microchip Technology Inc. is an 8Kbit, 4.5–5.5V serial EEPROM with Microwire-compatible 3-wire interface, 8-bit organization (no ORG pin), and industrial temperature range (–40°C to +85°C). It features self-timed erase/write cycles, 1M endurance, >200-year data retention, and integrated power-on/off data protection. Used in embedded system configuration storage where low-voltage write-enable and robust nonvolatile memory are required.
For engineers reviewing the 93C76CT-I/SN datasheet, 93C76CT-I/SN pinout, 93C76CT-I/SN application, or 93C76CT-I/SN equivalent, key selection criteria include VCC operating range (4.5–5.5V), absence of ORG/PE pins (fixed 8-bit x1024), SOIC-8 package compatibility, industrial-grade reliability, and Microwire protocol timing compliance at up to 3 MHz.
Technical Context
The 93C76CT-I/SN implements a synchronous 3-wire Microwire interface (CS, CLK, DI/DO) with dedicated 8-bit memory organization - no ORG or PE pins present. It executes READ, WRITE, ERASE, ERAL, WRAL, EWEN, and EWDS instructions via clocked serial bitstreams, with DO providing Ready/Busy status during programming.
Its internal architecture includes auto-erase-before-write, power-on reset detection (VPOR = 3.8V), and hardware-level data protection that inhibits all operations below VCC threshold. Write cycle time is 2 ms (TWC), ERAL requires ≥4.5V, and it supports sequential read without address retransmission while CS remains high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1024 × 8-bit organization; fixed, no ORG pin) |
| VCC Operating Range | 4.5 V to 5.5 V - defines minimum system rail stability for reliable write operation |
| Interface Protocol | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - requires no I²C or SPI host peripheral |
| Write Cycle Time | 2 ms (TWC) - determines minimum interval between consecutive write commands |
| Endurance | 1,000,000 erase/write cycles - supports long-term field calibration or logging use cases |
| Data Retention | Greater than 200 years at 25°C - ensures firmware/config persistence across product lifetime |
| Temperature Range | –40°C to +85°C (Industrial grade) - validated for deployment in industrial control and automotive body electronics |
Pinout & Package
93C76CT-I/SN is supplied in an 8-lead SOIC package (SN suffix), with standard 150-mil width and Pb-free Matte Tin finish. Pin 1 is marked by laser dot; pin 1 ID corner is bottom-left when notch faces up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CS | Chip Select | Active-high enable: must be held low ≥250 ns between instructions; deselects device into standby mode |
| 2 - CLK | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data; stoppable mid-sequence |
| 3 - DI | Data Input | Receives Start bit, opcodes, addresses, and write data; tied to DO only with current-limiting resistor |
| 4 - DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge |
| 5 - VSS | Ground | Reference return path for all signals and internal logic; must be low-impedance |
| 6 - NC | No Connect | Not bonded; left floating per Microchip design - no external connection permitted |
| 7 - NC | No Connect | Not bonded; left floating per Microchip design - no external connection permitted |
| 8 - VCC | Power Supply | 4.5–5.5 V supply; VPOR = 3.8 V ensures automatic write inhibition during brown-out |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write with auto-erase | Eliminates need for external timing control or polling delay loops in firmware |
| Power-on/off data protection circuitry | Hardware-enforced write inhibition below 3.8 V prevents corruption during power ramp-up/down |
| Device status signal (Ready/Busy on DO) | Enables efficient polling-based write completion detection without fixed delays |
| Sequential read function | Reduces host CPU overhead by automatically incrementing address on successive reads under CS high |
| Industry-standard 3-wire serial I/O | Minimizes GPIO usage on resource-constrained MCUs; compatible with legacy Microwire controllers |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing calibrated sensor offsets, I/O mapping tables, and user-defined operational modes in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed infrequently but requiring guaranteed write integrity during power loss. Use Value: 2 ms write cycle and 3.8 V VPOR ensure safe parameter updates even during unstable AC line conditions or battery dips. |
Use Scenario: Retaining door lock settings, mirror position memory, and lighting profiles across ignition cycles in BCMs. IC Role / Device Role / Timing Role: Dedicated 8-bit serial EEPROM interfaced directly to 8-bit MCU GPIOs with minimal external components. Use Value: SOIC-8 footprint and 4.5–5.5 V operation align with 5 V automotive subsystem rails and simplify layout vs. wide-VCC alternatives. |
| Medical Device Calibration Data | Point-of-Sale Terminal Settings |
Use Scenario: Holding factory-calibrated ADC gain/offset coefficients and safety-critical operational limits in portable diagnostic equipment. IC Role / Device Role / Timing Role: Tamper-resistant, long-retention memory element certified for Class II medical devices. Use Value: >200-year data retention and 1M endurance meet IEC 62304 software lifecycle requirements without periodic refresh. |
Use Scenario: Storing tax rate tables, receipt header templates, and operator PIN hashes in retail terminals deployed globally. IC Role / Device Role / Timing Role: Low-pin-count, drop-in replacement for legacy 93C46/93C56 in cost-sensitive payment hardware. Use Value: Pin-compatible with industry-standard SOIC-8 footprint and identical Microwire command set simplifies BOM rationalization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93C76A-I/SN | Identical electrical specs, same SOIC-8 package, but marked as '93C76A' instead of '93C76CT'; no functional difference confirmed in DS21796M | No difference in supported use cases; both rated for Industrial temp and 4.5–5.5 V operation | Select 93C76CT-I/SN when traceability requires 'CT' marking per Microchip's 2012+ revision (M) packaging spec |
| AT25080B-SSHL-T | 8 Kbit SPI interface (4-wire), 2.5–5.5 V VCC, 5 ms write cycle, no Ready/Busy pin - requires different host driver stack | Requires SPI-capable MCU; unsuitable for Microwire-only systems; higher VCC min enables wider supply flexibility | Choose only if migrating from Microwire to SPI architecture; not a drop-in replacement due to protocol and timing differences |
Compared with 93C76A-I/SN, the 93C76CT-I/SN offers identical functionality with updated traceability marking, while AT25080B-SSHL-T demands full interface redesign and sacrifices deterministic Ready/Busy signaling for broader voltage support.
Availability
93C76CT-I/SN is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and medical device manufacturing requiring stable component supply, long-term obsolescence planning, and RoHS-compliant sourcing.
Supply support for 93C76CT-I/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 microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93C76CT-I/SN belongs to Microchip's legacy 93Cxx serial EEPROM family, designed specifically for cost-sensitive, low-pin-count embedded systems requiring simple, reliable nonvolatile storage without complex protocol stacks.
FAQ
What is the memory organization of the 93C76CT-I/SN?
93C76CT-I/SN has a fixed 1024 × 8-bit (8 Kbit) organization. Unlike 'C'-suffix variants (e.g., 93C76C), it lacks ORG and PE pins - confirming it is a dedicated 8-bit device per the Device Selection Table in DS21796M. This eliminates external configuration logic and simplifies host interface design.
Does the 93C76CT-I/SN support 16-bit word access?
No, the 93C76CT-I/SN does not support 16-bit word access. Its part number suffix 'T' and absence of ORG/PE pins confirm it is a '76A'-type variant - exclusively 8-bit organization. Only 93C76B and 93C76C devices support x16 mode, and the latter requires ORG pin control.
What is the maximum clock frequency supported by the 93C76CT-I/SN?
The 93C76CT-I/SN supports up to 3 MHz clock frequency (FCLK) when VCC is 4.5–5.5 V, as specified in Table 1-2 (A1) of DS21796M. At this rate, instruction execution times (e.g., 22-clock READ) complete in under 8 μs, enabling responsive configuration access in real-time systems.
How does the 93C76CT-I/SN protect against accidental writes during power-up?
The 93C76CT-I/SN incorporates a 3.8 V VCC voltage detect (VPOR) circuit. When VCC drops below 3.8 V, all write/erase functions are automatically inhibited - preventing data corruption during brown-out or incomplete power ramp-up. This hardware protection operates independently of firmware or external supervision.
Is the 93C76CT-I/SN pin-compatible with earlier 93C76A-I/SN devices?
Yes, the 93C76CT-I/SN is physically and electrically pin-compatible with 93C76A-I/SN: both use SOIC-8 (SN) packaging, share identical pinout (CS, CLK, DI, DO, VSS, NC, NC, VCC), and conform to the same Microwire timing and instruction set. The 'CT' suffix reflects updated marking per Microchip's 2012 revision M, not a functional change.
93C76CT-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93C76CT-I/SN FAQ
1.How can I place an order for 93C76CT-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C76CT-I/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 93C76CT-I/SN reliable?
The price and inventory of 93C76CT-I/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93C76CT-I/SN is usually 5 days.
3.What payment methods are accepted for 93C76CT-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C76CT-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C76CT-I/SN?
93C76CT-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C76CT-I/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 93C76CT-I/SN?
For technical support, including 93C76CT-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C76CT-I/SN requirements.
6.How does Aetrix verify that 93C76CT-I/SN is sourced from the original manufacturer or authorized distributors?
All 93C76CT-I/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 93C76CT-I/SN meets industry standards.
7.What is the process for return or replacement of 93C76CT-I/SN?
All 93C76CT-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93C76CT-I/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 93C76CT-I/SN part is unused and in its original packaging.
Return procedure for 93C76CT-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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