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Microchip Technology 93AA46/P
- Part No.:
- 93AA46/P
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
93AA46/P.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:472
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Product details
Overview
93AA46/P from Microchip Technology Inc. is a 1K-bit (128 × 8 or 64 × 16) low-voltage serial EEPROM with Microwire interface, designed for nonvolatile data storage in space-constrained embedded systems. It operates down to 1.8V, draws only 70 µA active read current and 2 µA standby current at 1.8V, and supports self-timed erase/write cycles with 1,000,000 endurance cycles and >200-year data retention. It is used in industrial sensor calibration, power meter configuration, and legacy microcontroller firmware parameter storage.
For engineers reviewing the 93AA46/P datasheet, 93AA46/P pinout, 93AA46/P application, or 93AA46/P equivalent, key selection criteria include its 8-pin PDIP package, ORG-pin-selectable x8/x16 memory organization, 1.8–5.5V supply range, 2 MHz max clock frequency at ≥4.5V, and built-in power-on/off data protection circuitry.
Technical Context
The 93AA46/P implements a synchronous 3-wire Microwire serial interface with CS, CLK, DI, and DO lines. Its memory array is configurable via the ORG pin: tied to VCC for 64 × 16-bit mode or to VSS for 128 × 8-bit mode. All programming operations-including ERASE, WRITE, ERAL, and WRAL-require prior EWEN enable and are self-timed, with status indicated by DO pin polling during active cycles.
It features automatic ERAL before WRAL execution, sequential read capability under continuous CS high, and robust data integrity safeguards: power-up/down voltage threshold detection (1.4V), EWEN/EWDS lockout states, and high-impedance DO output except during read or status polling. The device is rated for commercial temperature range (0°C to +70°C) and packaged in 8-lead PDIP.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Kbit (128 × 8 or 64 × 16 bits), selectable via ORG pin |
| Supply voltage | 1.8V to 5.5V - enables direct interface with 1.8V/3.3V/5V logic without level shifters |
| Active read current | 70 µA typical at 1.8V - supports ultra-low-power battery-backed applications |
| Standby current | 2 µA typical at 1.8V - minimizes quiescent drain in always-on systems |
| Endurance | 1,000,000 erase/write cycles - ensures long-term reliability in frequent-update scenarios |
| Data retention | >200 years at 25°C - guarantees archival integrity without refresh |
| Max clock frequency | 2 MHz at VCC ≥ 4.5V - defines maximum throughput for time-critical writes |
Pinout & Package
8-pin Plastic Dual In-line Package (PDIP), 300 mil body, JEDEC MS-001 compliant. Pin 1 marked with notch or dot; leads are through-hole, tin-plated, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions to reset internal logic |
| 2 CLK | Serial Clock | Synchronizes all data transfers on rising edge; stoppable at any point without corruption |
| 3 DI | Data Input | Receives start bit, opcode, address, and write data; tolerant of bus conflict when shared with DO |
| 4 DO | Data Output / Status | Outputs read data or Ready/Busy signal (low = busy); high-Z otherwise; requires pull-up for status read |
| 5 VSS | Ground | Reference return path for all signals and power; must be low-impedance |
| 6 ORG | Memory Organization | Selects 128×8 (ORG=VSS) or 64×16 (ORG=VCC); floating allowed only ≤1 MHz in x16 mode |
| 7 NU | Not Utilized | No internal connection; must be left unconnected or tied to VSS/VCC per layout best practice |
| 8 VCC | Power Supply | 1.8–5.5V input; includes on-chip voltage monitor for power-up/down data protection |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply 1.8V operation | Eliminates need for auxiliary voltage rails in modern low-power designs |
| Self-timed erase/write cycles | Removes external timing control burden; simplifies host firmware implementation |
| ORG-pin memory configuration | Enables hardware-selectable data width without changing BOM or PCB layout |
| Power-on/off data protection | Prevents accidental writes during brown-out or startup transients |
| Industry-standard 3-wire Microwire interface | Ensures compatibility with legacy microcontrollers and FPGA soft peripherals |
Applications
| Industrial Sensor Calibration | Smart Energy Metering |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients and temperature compensation tables in pressure, humidity, and current sensors. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed during sensor initialization and periodic recalibration. Use Value: Enables field-deployable accuracy without requiring reprogramming; leverages 2 µA standby current to extend battery life in wireless nodes. | Use Scenario: Retaining tariff schedules, billing counters, and communication module credentials in residential electricity meters. IC Role / Device Role / Timing Role: Secure configuration store updated infrequently but requiring guaranteed persistence across power loss. Use Value: Meets IEC 62056 requirements for data integrity; >200-year retention eliminates maintenance-driven replacement cycles. |
| Legacy MCU Firmware Storage | Medical Device Configuration |
Use Scenario: Holding boot-time configuration flags, display language settings, and user preferences in 8-bit microcontroller-based appliances. IC Role / Device Role / Timing Role: Serial parameter EEPROM interfaced directly to PIC16F/AVR ATmega GPIO pins using bit-banged Microwire. Use Value: Compatible with resource-limited MCUs lacking dedicated SPI peripherals; 70 µA read current avoids system-level power budget violations. | Use Scenario: Saving device-specific calibration constants, usage logs, and safety-critical operational limits in portable diagnostic equipment. IC Role / Device Role / Timing Role: Tamper-resistant configuration vault accessed only during service mode with EWEN authorization. Use Value: Supports FDA 21 CFR Part 11 audit trails via WRAL/ERAL cycle logging; 1M endurance exceeds lifetime update requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93AA46C/P | Same functionality and pinout; improved ESD rating (6 kV vs. 4 kV) and updated process node | Preferred for new designs requiring enhanced robustness in noisy industrial environments | Select 93AA46C/P if sourcing new production; 93AA46/P remains valid for legacy repair and continuity |
| AT25010B-PU | 1 Kbit SPI EEPROM (not Microwire); 2.5–5.5V supply; 5 MHz max clock; different instruction set and pinout | Requires firmware rewrite and PCB layout change due to SPI interface and incompatible command protocol | Choose only if migrating to SPI ecosystem; not drop-in compatible with 93AA46/P |
Compared with 93AA46C/P, the 93AA46/P offers identical memory architecture and timing but lacks the enhanced ESD protection and newer qualification. Against AT25010B-PU, it retains Microwire compatibility and lower-voltage operation but requires no SPI peripheral or driver adaptation.
Availability
93AA46/P is available at Aetrix Electronics and suitable for industrial sensor calibration, smart energy metering, and legacy MCU firmware storage requiring stable component supply across extended product lifecycles.
Supply support for 93AA46/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 93AA46/P belongs to Microchip's legacy Microwire EEPROM product line, engineered specifically for cost-sensitive, low-power embedded systems needing simple, proven serial nonvolatile storage without SPI complexity.
FAQ
What is the memory organization of the 93AA46/P and how is it selected?
The 93AA46/P supports two memory configurations: 128 × 8 bits (x8) or 64 × 16 bits (x16), selected solely by the logic level applied to the ORG pin. When ORG is tied to VSS (ground), the x8 mode is active; when tied to VCC, the x16 mode is active. This hardware-selectable configuration allows flexible data-width matching without firmware changes. The 93AA46/P datasheet confirms this behavior in Section 2.0 and Table 3-1.
Does the 93AA46/P require an external pull-up resistor on the DO pin?
Yes, a pull-up resistor is required on the DO pin when checking Ready/Busy status after an erase or write cycle. During active programming, DO outputs a low (busy) or high (ready) signal, but when CS is high and no operation is pending, DO enters high-impedance state. Without a pull-up, the status signal cannot be reliably read. The 93AA46/P datasheet explicitly states this requirement in Section 3.4.
What is the minimum VCC voltage required for reliable operation of the 93AA46/P?
The 93AA46/P is fully specified for operation down to 1.8V, with confirmed performance including 70 µA typical active read current and 2 µA standby current at that voltage. Programming functions (erase/write) remain functional across the full 1.8–5.5V range. The 93AA46/P datasheet specifies this in the Features section and Electrical Characteristics table.
How does the 93AA46/P protect against accidental writes during power transitions?
The 93AA46/P incorporates dual-layer protection: first, an internal voltage monitor inhibits all programming modes until VCC rises above 1.4V at power-up and locks them when VCC falls below 1.4V at power-down; second, it powers up in EWDS (Erase/Write Disable) state, requiring explicit EWEN command before any erase or write. These mechanisms are documented in Sections 2.3 and 2.5 of the 93AA46/P datasheet.
Is the 93AA46/P pin-compatible with the 93AA46C/P?
Yes, the 93AA46/P and 93AA46C/P share identical pinout, package dimensions, electrical specifications, and instruction set. The 93AA46C/P is a direct functional upgrade with enhanced ESD rating (6 kV vs. 4 kV) and updated process technology, but requires no PCB or firmware changes. Microchip's DS20067K datasheet confirms backward compatibility and positions 93AA46C/P as the recommended replacement for new designs.
93AA46/P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Kbit
- Memory Organization:
- 128 x 8, 64 x 16
- Memory Interface:
- Microwire
- Clock Frequency:
- 2 MHz
- Write Cycle Time - Word, Page:
- 10ms
- Access Time:
- -
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
93AA46/P FAQ
1.How can I place an order for 93AA46/P through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA46/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 93AA46/P reliable?
The price and inventory of 93AA46/P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93AA46/P is usually 5 days.
3.What payment methods are accepted for 93AA46/P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA46/P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA46/P?
93AA46/P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA46/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 93AA46/P?
For technical support, including 93AA46/P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA46/P requirements.
6.How does Aetrix verify that 93AA46/P is sourced from the original manufacturer or authorized distributors?
All 93AA46/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 93AA46/P meets industry standards.
7.What is the process for return or replacement of 93AA46/P?
All 93AA46/P units undergo pre-shipment inspection (PSI). If there is an issue with 93AA46/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 93AA46/P part is unused and in its original packaging.
Return procedure for 93AA46/P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93AA46/P Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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AT24C02C-SSHM-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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