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Microchip Technology 93AA76C-I/P
- Part No.:
- 93AA76C-I/P
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
93AA76C-I/P.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,209
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Product details
Overview
93AA76C-I/P from Microchip Technology is an 8 Kbit, low-voltage, serial EEPROM with Microwire-compatible 3-wire interface, supporting configurable 8-bit or 16-bit word organization via the ORG pin, write protection via the PE pin, and industrial temperature operation (–40°C to +85°C) in 8-lead PDIP package. It delivers 1 million erase/write cycles and >200-year data retention for nonvolatile storage in embedded control systems.
For engineers reviewing the 93AA76C-I/P datasheet, 93AA76C-I/P pinout, 93AA76C-I/P application, or 93AA76C-I/P equivalent, key selection criteria include VCC range (1.8–5.5 V), self-timed erase/write (5 ms typical), Ready/Busy status signaling, program enable logic, and ORG-configurable memory width - all critical for power-constrained, space-limited, and reliability-sensitive designs.
Technical Context
The 93AA76C-I/P implements a synchronous serial Microwire interface with CS, CLK, DI, and DO signals, where instruction execution is triggered by a Start condition (CS high + DI high on CLK rising edge). Its dual-word-size capability is controlled solely by the external logic level on the ORG pin - high for x16 (512 × 16), low for x8 (1024 × 8).
Write operations require prior EWEN command activation and a logic-high PE signal; the device remains in EWDS state at power-up for default write protection. During erase/write, DO provides real-time Ready/Busy status polling, and automatic ERAL precedes WRAL, ensuring full-array integrity before bulk programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1024 × 8 or 512 × 16, selectable via ORG pin) |
| VCC operating range | 1.8 V to 5.5 V - supports single-supply battery and mixed-voltage system integration |
| Write cycle time | 5 ms max - enables deterministic firmware update timing without host CPU polling overhead |
| Endurance | 1,000,000 erase/write cycles - suitable for frequent configuration or calibration data logging |
| Data retention | >200 years at 25°C - ensures long-term reliability in unattended equipment |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - minimal GPIO usage, no SPI mode bits required |
| Temperature grade | Industrial (–40°C to +85°C) - validated for factory automation and industrial HMI applications |
Pinout & Package
8-lead PDIP (Plastic Dual In-line Package), 0.300" wide, through-hole mounting. Pin 1 marked by notch or dot; pin 1 ID confirmed by laser mark 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 to reset internal logic |
| CLK | Serial Clock | Synchronizes all data transfers on rising edge; clock can be paused mid-sequence without error |
| DI | Data Input | Accepts Start bit, opcode, address, and write data; tied to DO only with series resistor to avoid bus conflict |
| 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; requires low-impedance connection to minimize noise |
| ORG | Organization Select | Logic high → x16 mode (512 words); logic low → x8 mode (1024 words); must not float |
| PE | Program Enable | Logic high required to execute EWEN, ERASE, WRITE, WRAL; tied low disables all writes permanently |
| VCC | Power Supply | Supplies core and I/O; internal POR triggers at ~1.5 V; decoupling capacitor mandatory |
Key Features
| Feature | Design Value |
|---|---|
| ORG-pin configurable word size | Enables single BOM for both 8-bit and 16-bit microcontroller interfaces without redesign |
| Program Enable (PE) pin | Hardware-level write lockout - prevents firmware corruption during brown-out or ESD events |
| Self-timed erase/write with auto-ERAL | Eliminates need for external timing components or software delay loops in host code |
| Ready/Busy status on DO | Allows efficient polling instead of fixed delays - reduces worst-case write latency by up to 40% |
| Low standby current (1 µA) | Extends battery life in always-on sensor nodes and portable diagnostic tools |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module (BCM) Trim Settings |
|---|---|
Use Scenario: Storing user-defined I/O mapping, alarm thresholds, and calibration offsets in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed during boot and runtime via Microwire interface. Use Value: Enables field-upgradable configurations without firmware reflash; ORG pin allows reuse across 8-bit and 16-bit PLC CPUs. | Use Scenario: Retaining seat position, mirror angle, and lighting preferences across ignition cycles in entry-level BCMs. IC Role / Device Role / Timing Role: Dedicated EEPROM for user preference storage, isolated from main MCU flash to prevent corruption. Use Value: PE pin ensures settings survive power glitches; 1M endurance supports lifetime vehicle use (>15 years). |
| Medical Infusion Pump Calibration Data | Smart Energy Meter Firmware Parameters |
Use Scenario: Holding flow-rate calibration coefficients, motor tuning values, and safety limits updated during service calibration. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for regulatory-critical parameters accessed only during maintenance mode. Use Value: Hardware write-protection (PE) and power-on data protection prevent unauthorized or accidental modification. | Use Scenario: Storing tariff schedules, metering constants, and communication keys in ANSI C12.19-compliant utility meters. IC Role / Device Role / Timing Role: Tamper-evident nonvolatile memory with guaranteed 200-year retention for compliance documentation. Use Value: Meets ANSI C12.19 Annex A requirements for secure parameter storage; Pb-free RoHS packaging satisfies global deployment mandates. |
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 | VCC range 2.5–5.5 V; same pinout, ORG/PE functionality, and 8K density | Not rated for 1.8 V operation - unsuitable for ultra-low-power or Li-ion–powered devices | Select when system VCC ≥2.5 V and higher noise immunity at VCC min is required |
| 93AA76C-I/SN | Identical electrical specs and functionality; SOIC-8 package instead of PDIP | Surface-mount assembly only; no through-hole option; smaller footprint (3.9 × 4.9 mm vs. 9.27 × 6.35 mm) | Select for automated PCB assembly or space-constrained layouts where PDIP is impractical |
Compared with 93LC76C-I/P, the 93AA76C-I/P extends low-voltage operation down to 1.8 V for battery longevity, while versus 93AA76C-I/SN it retains legacy through-hole compatibility without sacrificing performance or feature set.
Availability
93AA76C-I/P is available at Aetrix Electronics and suitable for industrial control, automotive body electronics, and medical device applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant through-hole packaging.
Supply support for 93AA76C-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 microcontrollers, analog devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93XX76 family was designed specifically for cost-sensitive, low-power embedded systems needing reliable, pin-efficient serial EEPROM - emphasizing hardware write protection, flexible word sizing, and broad voltage operation.
FAQ
What is the minimum VCC required for reliable operation of the 93AA76C-I/P?
The 93AA76C-I/P operates reliably down to 1.8 V, with internal power-on reset (POR) triggering at approximately 1.5 V. Below 1.8 V, read/write functions are not guaranteed per DS21796M, and the device enters undefined behavior. This 1.8 V minimum enables direct interfacing with 1.8 V and 2.5 V microcontrollers without level-shifting.
How does the ORG pin affect memory addressing in the 93AA76C-I/P?
When ORG is high, the 93AA76C-I/P configures as 512 × 16-bit (x16), using 9-bit addresses (A8–A0); when ORG is low, it configures as 1024 × 8-bit (x8), using 10-bit addresses (A9–A0). The instruction set and clock cycle count differ accordingly - 29 cycles for x16 reads versus 22 for x8 reads - and must be matched in host firmware.
Is the 93AA76C-I/P pin-compatible with other members of the 93XX76 family?
Yes - the 93AA76C-I/P shares identical 8-lead PDIP pinout and signal definitions with 93LC76C-I/P and 93C76C-I/P. However, VCC ranges differ: 93AA76C-I/P supports 1.8–5.5 V, while 93LC76C-I/P requires ≥2.5 V and 93C76C-I/P ≥4.5 V. Swapping requires verifying system supply voltage compatibility.
What happens if the PE pin is left floating on the 93AA76C-I/P?
The PE pin must never be left floating - it must be actively driven to VCC (to enable writes) or VSS (to disable writes). A floating PE pin causes undefined behavior: writes may succeed unpredictably or fail entirely, violating data integrity guarantees. Microchip specifies a 10 kΩ pull-down resistor as recommended practice for default write protection.
Does the 93AA76C-I/P support sequential read mode, and how is it enabled?
Yes - sequential read is supported and enabled automatically when CS remains high after the initial READ instruction. The device increments the internal address counter after each byte or word is output on DO, allowing continuous streaming of memory contents without reissuing opcodes. This reduces host CPU overhead and improves throughput in bulk-read scenarios.
93AA76C-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:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
93AA76C-I/P FAQ
1.How can I place an order for 93AA76C-I/P through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA76C-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 93AA76C-I/P reliable?
The price and inventory of 93AA76C-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 93AA76C-I/P is usually 5 days.
3.What payment methods are accepted for 93AA76C-I/P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA76C-I/P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA76C-I/P?
93AA76C-I/P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA76C-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 93AA76C-I/P?
For technical support, including 93AA76C-I/P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA76C-I/P requirements.
6.How does Aetrix verify that 93AA76C-I/P is sourced from the original manufacturer or authorized distributors?
All 93AA76C-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 93AA76C-I/P meets industry standards.
7.What is the process for return or replacement of 93AA76C-I/P?
All 93AA76C-I/P units undergo pre-shipment inspection (PSI). If there is an issue with 93AA76C-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 93AA76C-I/P part is unused and in its original packaging.
Return procedure for 93AA76C-I/P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93AA76C-I/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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AT24C04C-SSHM-T
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AT24C08C-STUM-T
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