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Microchip Technology AT93C46A-10PI-2.5
- Part No.:
- AT93C46A-10PI-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT93C46A-10PI-2.5.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 2MHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,580
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Product details
Overview
AT93C46A-10PI-2.5 from Microchip Technology is a 1-Kbit serial EEPROM organized as 128 × 8 or 64 × 16, supporting Microwire-compatible 3-wire serial interface, 2.5 V to 5.5 V supply voltage, and 10 MHz max clock frequency. It operates in industrial temperature range (−40°C to +85°C) and is used in embedded system configuration storage for microcontrollers.
For engineers reviewing the AT93C46A-10PI-2.5 datasheet, AT93C46A-10PI-2.5 pinout, AT93C46A-10PI-2.5 application, or AT93C46A-10PI-2.5 equivalent, key selection factors include voltage compatibility (2.5 V min), interface timing compliance, endurance (1M write cycles), data retention (200 years), and package type (8-pin PDIP).
Technical Context
The AT93C46A-10PI-2.5 implements a Microwire-compatible serial interface with CS, SK, DI, and DO signals, supporting both 8-bit and 16-bit word organization selectable via ORG pin. It uses CMOS process technology and includes built-in write protection via software and hardware (WP pin) control.
Internal architecture features a self-timed erase/write cycle with automatic end-of-write detection, and an internal address counter enabling sequential read operations. The device supports page write mode with up to 16-byte pages for 8-bit organization or 8-word pages for 16-bit organization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (128 × 8 or 64 × 16), enabling compact non-volatile storage for calibration data or firmware flags. |
| Supply Voltage | 2.5 V to 5.5 V, allowing direct interface with 2.5 V, 3.3 V, and 5 V logic systems without level shifting. |
| Max Clock Frequency | 10 MHz, supporting fast configuration loading in time-critical boot sequences. |
| Write Endurance | 1,000,000 cycles, suitable for applications requiring frequent parameter updates such as sensor calibration registers. |
| Data Retention | 200 years at +25°C, ensuring long-term reliability in unattended industrial deployments. |
| Operating Temp | −40°C to +85°C, qualified for use in industrial control panels and outdoor metering equipment. |
| Interface Protocol | Microwire-compatible 3-wire serial (CS/SK/DI/DO), reducing MCU GPIO usage versus parallel EEPROMs. |
Pinout & Package
AT93C46A-10PI-2.5 is housed in an 8-pin plastic dual in-line package (PDIP) with 0.3-inch body width and standard through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Accepts 2.5–5.5 V; must be decoupled with 0.1 µF capacitor near pin for noise immunity. |
| VSS | Ground reference | System common ground return path; connects to PCB ground plane for stable operation. |
| CS | Chip select input | Active-low enable signal; initiates communication only when low and held stable during SK transitions. |
| SK | Serial clock input | Synchronizes data transfer; supports up to 10 MHz; requires clean edge monotonicity. |
| DI | Serial data input | Carries command opcodes and write data; sampled on SK rising edge per Microwire spec. |
| DO | Serial data output | Provides read data and status bits; driven only when CS is active and during read cycles. |
| ORG | Organization select | High = 64 × 16 mode; low = 128 × 8 mode; sets internal address mapping at power-up. |
| WP | Write protect input | Active-low hardware lock; disables all write/erase when pulled low, independent of software protection. |
Key Features
| Feature | Design Value |
|---|---|
| Software Write Protection | Enables selective locking of memory blocks via instruction sequence, preventing accidental overwrites during firmware updates. |
| Hardware Write Protection | WP pin provides fail-safe physical disable of write operations, critical for safety-critical configuration storage. |
| Page Write Mode | Supports multi-byte writes (up to 16 bytes in 8-bit mode), reducing total programming time versus byte-by-byte writes. |
| Self-Timed Write Cycle | Internal timing eliminates need for external delay management; MCU can poll DO or wait fixed tWR (10 ms max) for completion. |
| Low-Power Standby | Consumes ≤1 µA typical at VCC = 5 V and TA = +25°C, minimizing quiescent current in battery-backed systems. |
Applications
| Industrial Sensor Calibration | Printer Configuration Storage |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients and temperature compensation tables for analog sensor front-ends. IC Role / Device Role / Timing Role: Non-volatile configuration register holding persistent sensor characterization data accessible at power-on reset. Use Value: Enables field-deployable sensors to retain calibration across power cycles and firmware updates without external backup power. | Use Scenario: Retaining paper size, print density, and ink level thresholds across printer power cycles and firmware upgrades. IC Role / Device Role / Timing Role: Dedicated configuration memory mapped to host MCU via Microwire interface during initialization. Use Value: Eliminates need for reconfiguration after each power cycle, improving user experience and reducing boot-time latency. |
| POS Terminal Settings | Motor Drive Parameter Storage |
Use Scenario: Saving tax rate tables, receipt formatting rules, and network credentials in retail point-of-sale terminals. IC Role / Device Role / Timing Role: Serial configuration store accessed during terminal boot and settings update routines. Use Value: Ensures regulatory compliance data persists through firmware patches and prevents unauthorized tampering via WP pin lock. | Use Scenario: Holding motor commutation angles, current limits, and thermal derating curves in BLDC drive controllers. IC Role / Device Role / Timing Role: Persistent parameter bank read at startup to configure PWM timing and protection thresholds. Use Value: Guarantees safe motor operation under varying ambient conditions without requiring recalibration after power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT93C46D-10PU-2.7 | Same 1-Kbit capacity and Microwire interface, but rated for 2.7–5.5 V supply; no 2.5 V support. | Not suitable for 2.5 V-only systems; requires minimum 2.7 V VCC. | Select only if system VCC ≥ 2.7 V and PDIP package is required. |
| M95010-WMN6TP | 1-Kbit SPI interface EEPROM (not Microwire); 2.5–5.5 V supply; 20 MHz max clock; SO-8 package. | Requires SPI-capable MCU pins and different driver code; incompatible protocol stack. | Choose only when migrating to SPI infrastructure and board layout allows SO-8 footprint. |
Compared with AT93C46D-10PU-2.7, the AT93C46A-10PI-2.5 enables 2.5 V operation in low-power systems; compared with M95010-WMN6TP, it retains Microwire compatibility for legacy MCU designs without SPI peripherals.
Availability
AT93C46A-10PI-2.5 is available at Aetrix Electronics and suitable for industrial sensor calibration, printer configuration storage, and POS terminal settings requiring stable component supply and long-term obsolescence planning.
Supply support for AT93C46A-10PI-2.5 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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and non-volatile memory solutions for embedded control applications.
The AT93Cxx series targets cost-sensitive, low-pin-count systems needing reliable serial EEPROM with Microwire compatibility and industrial-grade reliability.
FAQ
What is the minimum operating voltage for the AT93C46A-10PI-2.5?
The AT93C46A-10PI-2.5 operates down to 2.5 V, making it compatible with modern low-voltage microcontrollers and battery-powered systems. This 2.5 V minimum is specified across the full industrial temperature range (−40°C to +85°C) and ensures reliable read/write functionality without margin degradation. The AT93C46A-10PI-2.5 maintains full Microwire timing compliance at this voltage level.
How does the ORG pin affect memory addressing in the AT93C46A-10PI-2.5?
The ORG pin on the AT93C46A-10PI-2.5 selects between two memory organizations at power-up: high = 64 words × 16 bits, low = 128 bytes × 8 bits. This determines the internal address width and command format - 16-bit mode uses 6-bit addresses, while 8-bit mode uses 7-bit addresses. The AT93C46A-10PI-2.5 latches ORG state only at power-on reset and ignores subsequent changes until next power cycle.
Can the AT93C46A-10PI-2.5 be used with a 5 V microcontroller system?
Yes, the AT93C46A-10PI-2.5 supports 5 V operation within its 2.5–5.5 V supply range and is fully compatible with 5 V logic-level Microwire interfaces. Its input thresholds meet TTL-compatible levels, and output drive strength ensures robust signal integrity into standard 5 V MCU inputs. The AT93C46A-10PI-2.5 requires no level-shifting circuitry in 5 V systems.
What write protection mechanisms does the AT93C46A-10PI-2.5 provide?
The AT93C46A-10PI-2.5 offers dual-layer write protection: hardware-based via the WP pin (active-low, disables all writes when asserted), and software-based via instruction-controlled locking of memory segments. Both mechanisms operate independently - WP overrides software settings. This ensures that critical configuration data stored in the AT93C46A-10PI-2.5 remains immune to accidental or malicious overwrite during field operation.
Is the AT93C46A-10PI-2.5 RoHS compliant and lead-free?
Yes, the AT93C46A-10PI-2.5 is RoHS compliant and manufactured with lead-free terminations per Microchip's standard product definition. The "-2.5" suffix denotes 2.5 V minimum operation, not packaging; the "PI" indicates plastic DIP package with lead-free finish. The AT93C46A-10PI-2.5 meets JEDEC J-STD-020 moisture sensitivity level 1 and is suitable for standard reflow and wave soldering processes.
AT93C46A-10PI-2.5 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:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT93C46A-10PI-2.5 FAQ
1.How can I place an order for AT93C46A-10PI-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46A-10PI-2.5 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 AT93C46A-10PI-2.5 reliable?
The price and inventory of AT93C46A-10PI-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C46A-10PI-2.5 is usually 5 days.
3.What payment methods are accepted for AT93C46A-10PI-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46A-10PI-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46A-10PI-2.5?
AT93C46A-10PI-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46A-10PI-2.5 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 AT93C46A-10PI-2.5?
For technical support, including AT93C46A-10PI-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46A-10PI-2.5 requirements.
6.How does Aetrix verify that AT93C46A-10PI-2.5 is sourced from the original manufacturer or authorized distributors?
All AT93C46A-10PI-2.5 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 AT93C46A-10PI-2.5 meets industry standards.
7.What is the process for return or replacement of AT93C46A-10PI-2.5?
All AT93C46A-10PI-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46A-10PI-2.5, 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 AT93C46A-10PI-2.5 part is unused and in its original packaging.
Return procedure for AT93C46A-10PI-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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