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Microchip Technology AT93C46-10PI-2.7
- Part No.:
- AT93C46-10PI-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT93C46-10PI-2.7.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 2MHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,692
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Product details
Overview
AT93C46-10PI-2.7 from Microchip Technology (formerly Atmel) is a 1K-bit three-wire serial EEPROM with user-selectable 128 × 8 or 64 × 16 organization, operating from 2.7V to 5.5V, featuring 2 MHz clock rate at 5V, 10 ms max self-timed write cycle, and automotive-grade industrial temperature range (−40°C to +85°C). It is commonly used for configuration storage in embedded controllers, power management ICs, and sensor calibration data retention.
For engineers reviewing the AT93C46-10PI-2.7 datasheet, AT93C46-10PI-2.7 pinout, AT93C46-10PI-2.7 application, or AT93C46-10PI-2.7 equivalent, key selection considerations include voltage compatibility (2.7–5.5V), ORG-pin configurable memory width, three-wire interface timing constraints, and industrial-temperature reliability requirements for non-volatile parameter storage.
Technical Context
The AT93C46-10PI-2.7 implements a synchronous three-wire serial interface (CS/SK/DI/DO) with start-bit–driven instruction decoding and supports READ, WRITE, ERASE, EWEN, EWDS, ERAL, and WRAL commands. Its internal organization is dynamically selected via the ORG pin: tied to VCC for 64 × 16 mode, grounded for 128 × 8 mode, or left floating (with internal 1 MΩ pull-up) for default x16 operation.
It features status feedback via DO during CS high after write/erase initiation (Ready/Busy signaling), no pre-erase requirement before write, and full DC/AC characterization across 1.8V–5.5V supply ranges. The -10PI-2.7 variant uses an 8-lead PDIP package and is rated for industrial temperature operation only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 × 8 or 64 × 16 organization selectable via ORG pin) |
| Supply Voltage | 2.7V to 5.5V - enables direct interfacing with 3.3V and 5V logic systems without level shifting |
| Max Clock Frequency | 2 MHz at VCC = 5V - defines maximum serial data throughput for configuration reads/writes |
| Write Cycle Time | 10 ms maximum - determines minimum time between successive write operations; impacts firmware update latency |
| Endurance | 1 million write cycles - ensures long-term reliability in field-updatable systems with frequent parameter changes |
| Data Retention | 100 years - guarantees persistent storage of calibration or security keys over product lifetime |
| Operating Temperature | −40°C to +85°C - validated for use in industrial control, automotive body electronics, and outdoor equipment |
Pinout & Package
AT93C46-10PI-2.7 is housed in an 8-lead PDIP (Plastic Dual Inline Package), 0.300" wide body, with standard through-hole mounting and JEDEC MS-001 compliant dimensions. Pin 1 is located at the top-left corner when viewed from the top with notch or dot orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must be low for instruction initiation and remains low throughout command execution |
| SK | Serial Clock | Input clock synchronizing all data transfers; rising edge samples DI, falling edge outputs DO |
| DI | Data Input | Serial input for instructions, addresses, and write data; latched on SK rising edges |
| DO | Data Output | Serial output for read data and Ready/Busy status; driven high for "ready", low for "busy" when CS is high post-write |
| GND | Ground | Reference return path for all I/O and supply currents; requires low-impedance connection to system ground plane |
| VCC | Power Supply | Primary supply rail (2.7–5.5V); decoupling capacitor (0.1 µF ceramic) required within 10 mm of pin |
| ORG | Organization Select | Configures memory width: VCC = x16 (64 words), GND = x8 (128 words); floating defaults to x16 via internal pull-up |
| DC | Don't Connect | No internal connection; must remain unconnected and un-biased to avoid leakage or noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Supports both byte-oriented (128 × 8) and word-oriented (64 × 16) access via single ORG pin - simplifies firmware adaptation across memory-width variants |
| Three-wire serial interface | Reduces MCU GPIO count and PCB routing complexity versus SPI/I²C; eliminates need for dedicated chip-select per device in daisy-chain configurations |
| Self-timed write cycle | Removes external timing control burden; firmware only monitors DO status or inserts fixed 10 ms delay - improves code portability and robustness |
| Industrial temperature rating | Validated operation from −40°C to +85°C ensures reliable boot-time configuration loading in harsh environments like factory automation or telecom infrastructure |
| High endurance & retention | 1M write cycles and 100-year data retention meet long-life requirements for medical devices, energy meters, and industrial PLCs where field updates occur infrequently but must persist |
Applications
| Printer Firmware Storage | Motor Drive Calibration |
|---|---|
|
Use Scenario: Storing printer model-specific font tables, paper-handling parameters, and maintenance counters across power cycles. IC Role / Device Role / Timing Role: Non-volatile configuration register providing persistent settings to the main controller during boot initialization. Use Value: Enables plug-and-play compatibility across printer families using identical MCU firmware, with hardware differentiation managed solely by EEPROM contents. |
Use Scenario: Holding motor-specific current limits, encoder offset values, and thermal derating curves in variable-frequency drives. IC Role / Device Role / Timing Role: Calibration data repository accessed once per power-on reset to configure PWM and current-sense scaling registers. Use Value: Eliminates manual potentiometer adjustment and allows factory auto-calibration, reducing assembly time and improving unit-to-unit consistency. |
| Smart Energy Meter Security Keys | Industrial Sensor Linearization Coefficients |
|
Use Scenario: Securing AES encryption keys and firmware signature certificates in utility-grade electricity meters subject to regulatory tamper-proofing requirements. IC Role / Device Role / Timing Role: Tamper-resistant secure storage element interfaced via isolated serial lines to prevent glitch-based attacks. Use Value: Meets IEC 62055-41 security mandates by isolating cryptographic material from main processor memory space and enabling write-protection via EWDS. |
Use Scenario: Storing polynomial coefficients for temperature-compensated pressure sensor output correction in HVAC and process control transmitters. IC Role / Device Role / Timing Role: Precision coefficient store loaded at startup to configure digital signal processor (DSP) filter coefficients. Use Value: Achieves ±0.1% full-scale accuracy over −25°C to +70°C without analog trimming components, reducing BOM cost and calibration labor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Microchip AT93C46A-10PI-2.7 | Enhanced version with improved ORG pin behavior: supports x16 mode with floating ORG without requiring external pull-up; tighter AC timing specs at 1.8V | Preferred for new designs requiring guaranteed x16 operation with unconnected ORG; backward-compatible in PDIP footprint | Select AT93C46A-10PI-2.7 when designing for long-term availability and simplified layout (no ORG pull-up resistor needed) |
| ON Semiconductor CAT93C46VI-GT3 | Pin-compatible 1K serial EEPROM with identical 8-pin SOIC/PDIP options; supports same 2.7–5.5V range but specifies 1.5 MHz max clock at 5V | Suitable for cost-sensitive industrial controls where marginal clock speed reduction is acceptable | Choose CAT93C46VI-GT3 if sourcing diversification is required and 2 MHz operation is not critical to system timing budget |
Compared with AT93C46-10PI-2.7, the AT93C46A-10PI-2.7 offers enhanced reliability in floating-ORG configurations and extended lifecycle support, while the CAT93C46VI-GT3 provides second-source assurance with minor timing trade-offs - both retain identical PDIP mechanical fit and instruction set compatibility.
Availability
AT93C46-10PI-2.7 is available at Aetrix Electronics and suitable for industrial control systems, smart metering platforms, and motor drive calibration requiring stable component supply across extended product lifecycles.
Supply support for AT93C46-10PI-2.7 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 is a global semiconductor company specializing in microcontrollers, analog devices, and non-volatile memory solutions, with a focus on embedded control and connectivity.
The AT93C46-10PI-2.7 belongs to Microchip's legacy serial EEPROM product line, designed specifically for low-pin-count, low-power configuration storage in cost-sensitive industrial and consumer electronics where simplicity and long-term data integrity are paramount.
FAQ
What is the function of the ORG pin on the AT93C46-10PI-2.7?
The ORG pin on the AT93C46-10PI-2.7 selects internal memory organization: tied to VCC for 64 × 16 mode, grounded for 128 × 8 mode. When left floating, the internal 1 MΩ pull-up defaults to x16 mode. This pin directly determines address width and data bus size during READ/WRITE operations, and its state must be stable before CS activation.
Does the AT93C46-10PI-2.7 require an erase cycle before writing?
No, the AT93C46-10PI-2.7 does not require a separate erase cycle before writing. Each WRITE instruction automatically erases the target location prior to programming, and the self-timed write cycle (≤10 ms) handles both operations internally. However, EWEN must be issued first to enable programming, and EWDS should follow to disable accidental writes.
Can the AT93C46-10PI-2.7 operate at 1.8V?
No, the AT93C46-10PI-2.7 is specified only for 2.7V to 5.5V operation. The "-2.7" suffix denotes this voltage grade. For 1.8V–5.5V operation, Microchip offers the AT93C46-10PI-1.8 variant, which shares the same PDIP package and pinout but has different DC/AC characteristics and ORG pin behavior.
How is Ready/Busy status monitored on the AT93C46-10PI-2.7?
Ready/Busy status is monitored on the DO pin: after initiating a WRITE or ERASE command, bring CS high (while maintaining SK low) for ≥250 ns, then sample DO. A logic high indicates completion ("Ready"), while logic low means the operation is still active ("Busy"). This status is only valid if CS is raised within the self-timed cycle window.
Is the AT93C46-10PI-2.7 RoHS compliant and halogen-free?
Yes, the AT93C46-10PI-2.7 is lead-free and halogen-free, meeting RoHS Directive 2011/65/EU requirements. It is manufactured using Pb-free terminations and halogen-free molding compounds, and is marked with the "LF" suffix in official Microchip documentation - consistent with industrial-grade environmental compliance standards.
AT93C46-10PI-2.7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Kbit
- Memory Organization:
- 128 x 8, 64 x 16
- Memory Interface:
- 3-Wire Serial
- Clock Frequency:
- 2 MHz
- Write Cycle Time - Word, Page:
- 10ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT93C46-10PI-2.7 FAQ
1.How can I place an order for AT93C46-10PI-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46-10PI-2.7 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 AT93C46-10PI-2.7 reliable?
The price and inventory of AT93C46-10PI-2.7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C46-10PI-2.7 is usually 5 days.
3.What payment methods are accepted for AT93C46-10PI-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46-10PI-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46-10PI-2.7?
AT93C46-10PI-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46-10PI-2.7 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 AT93C46-10PI-2.7?
For technical support, including AT93C46-10PI-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46-10PI-2.7 requirements.
6.How does Aetrix verify that AT93C46-10PI-2.7 is sourced from the original manufacturer or authorized distributors?
All AT93C46-10PI-2.7 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 AT93C46-10PI-2.7 meets industry standards.
7.What is the process for return or replacement of AT93C46-10PI-2.7?
All AT93C46-10PI-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46-10PI-2.7, 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 AT93C46-10PI-2.7 part is unused and in its original packaging.
Return procedure for AT93C46-10PI-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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