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Microchip Technology AT93C46-10PI-1.8
- Part No.:
- AT93C46-10PI-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT93C46-10PI-1.8.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 2MHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,333
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Product details
Overview
AT93C46-10PI-1.8 from Microchip Technology (formerly Atmel) is a 1K-bit three-wire serial EEPROM with user-selectable 128 × 8 or 64 × 16 organization, operating from 1.8V to 5.5V supply, featuring 2 MHz clock rate at 5V, self-timed 10 ms max write cycle, and automotive-grade reliability for industrial control and embedded configuration storage.
For engineers reviewing the AT93C46-10PI-1.8 datasheet, AT93C46-10PI-1.8 pinout, AT93C46-10PI-1.8 application, or AT93C46-10PI-1.8 equivalent, key selection criteria include low-voltage operation down to 1.8V, ORG-pin configurable memory width, 1 million write endurance, 100-year data retention, and compatibility with space-constrained PDIP-8 layouts in industrial temperature range (−40°C to +85°C).
Technical Context
The AT93C46-10PI-1.8 implements a synchronous three-wire serial interface (CS/SK/DI/DO) with start-bit–driven instruction decoding, supporting READ, WRITE, ERASE, EWEN, EWDS, ERAL, and WRAL commands. Its internal organization is selected via the ORG pin: tied to VCC for 64 × 16 mode or GND for 128 × 8 mode - a hardware-configurable feature not available on 1.8V-only variants per datasheet note.
Write operations require prior EWEN activation and are fully self-timed; DO pin provides Ready/Busy status when CS is raised during write/erase cycles. The device uses no external erase step, supports 100 ns minimum SK pulse width at 1.8V, and maintains functional read capability independent of programming state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 × 8 or 64 × 16 organization) |
| Supply Voltage Range | 1.8V to 5.5V - enables direct interfacing with 1.8V logic and mixed-voltage systems |
| Max Clock Frequency | 2 MHz at VCC = 5V; 250 kHz min at VCC = 1.8V - defines maximum serial throughput |
| Write Cycle Time | 10 ms maximum - determines worst-case firmware delay before next command |
| Endurance | 1 million write/erase cycles - supports frequent calibration or logging updates |
| Data Retention | 100 years at TA ≤ 85°C - ensures long-term configuration integrity without refresh |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive under-hood environments |
Pinout & Package
AT93C46-10PI-1.8 is supplied in an 8-lead PDIP package (0.300" wide body, JEDEC MS-001 BA compliant), with 0.100" lead pitch and through-hole mounting. Pin 1 is marked by notch or dot; package meets RoHS, lead-free, and halogen-free requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for serial communication; must be held low for full instruction duration |
| SK | Serial Clock | Input clock synchronizing all data transfers; rising edge samples DI, shifts DO |
| DI | Data Input | Serial input for instructions and write data; latched on SK rising edge |
| DO | Data Output | Open-drain output providing read data or Ready/Busy status during programming |
| GND | Ground Reference | Primary return path for VCC and signal currents; requires low-impedance PCB connection |
| VCC | Power Supply | Single-supply input (1.8V–5.5V); decoupling capacitor required within 10 mm |
| ORG | Organization Select | Hardware-configured memory width: VCC = x16, GND = x8; unconnected defaults to x16 (not recommended for 1.8V devices) |
| DC | No Connect | Internally unused terminal; must remain floating or tied to GND per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Three-wire serial interface | Reduces MCU GPIO count and PCB routing complexity vs. SPI/I²C; no address lines needed |
| User-selectable memory organization | Enables flexible byte- or word-oriented access without firmware rework - selected at hardware level |
| Self-timed write cycle | Eliminates need for external timing control or polling overhead; DO status simplifies host synchronization |
| 1.8V low-voltage operation | Direct integration with ultra-low-power microcontrollers and battery-backed systems |
| Automotive-grade qualification | Validated for extended temperature and high-reliability applications including engine control and instrumentation |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module |
|---|---|
Use Scenario: Storing calibrated sensor offsets, I/O mapping tables, and firmware revision flags in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed infrequently during power-up or field update. Use Value: 100-year retention ensures parameter persistence across decades of operation without backup power. | Use Scenario: Holding door lock logic states, mirror position presets, and lighting profiles in vehicle body electronics. IC Role / Device Role / Timing Role: Serial EEPROM interfaced to 1.8V CAN/LIN microcontroller for secure, low-power parameter storage. Use Value: 1.8V operation eliminates level-shifting components; 1M endurance supports lifetime recalibration cycles. |
| Medical Device Calibration Data | Consumer Appliance Settings Memory |
Use Scenario: Recording factory-calibrated ADC gain/offset coefficients and safety-critical thresholds in portable diagnostic tools. IC Role / Device Role / Timing Role: Read-once-at-boot, write-rarely storage element with traceable write-cycle counting. Use Value: 1 million write cycles allow full recalibration history logging over product lifetime. | Use Scenario: Saving user-selected wash cycles, temperature preferences, and child-lock status in smart washing machines. IC Role / Device Role / Timing Role: Low-pin-count, cost-optimized nonvolatile memory sharing bus with display controller and motor driver. Use Value: Three-wire interface reduces BOM count vs. SPI EEPROM; PDIP-8 eases manual assembly and rework. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT93C46-10SI-1.8 | Same electrical specs but in 8-lead JEDEC SOIC (8S1) package - 5.0 × 6.2 mm footprint, surface-mount only | Requires SMT assembly; unsuitable for through-hole prototyping or legacy PDIP sockets | Select when board space is constrained and reflow capability exists |
| M95010-WMN6TP | 1K-bit SPI EEPROM (not three-wire); 1.8V–5.5V; 10 MHz max clock; 5 ms write time; SO8 package | Uses 4-wire SPI interface (CS/SCK/MOSI/MISO); incompatible pinout and protocol stack | Choose only if migrating to SPI architecture and redesigning firmware interface layer |
Compared with AT93C46-10SI-1.8, the AT93C46-10PI-1.8 offers identical functionality in a through-hole PDIP package for manual assembly and socket-based validation, while M95010-WMN6TP requires SPI hardware support and delivers faster clocking but introduces protocol-level incompatibility.
Availability
AT93C46-10PI-1.8 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, medical calibration systems, and consumer appliance settings storage requiring stable component supply across extended product lifecycles.
Supply support for AT93C46-10PI-1.8 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 delivering microcontrollers, analog, FPGA, and memory solutions with focus on reliability, longevity, and embedded system integration.
The AT93C46-10PI-1.8 belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-pin-count, industrial-grade nonvolatile storage where three-wire simplicity and 1.8V compatibility are critical.
FAQ
What is the function of the ORG pin on the AT93C46-10PI-1.8?
The ORG pin on the AT93C46-10PI-1.8 selects internal memory organization: tied to VCC enables 64 × 16 (x16) mode, tied to GND enables 128 × 8 (x8) mode. Datasheet notes that ORG is not functional on 1.8V-only devices - meaning AT93C46-10PI-1.8 requires VCC ≥ 2.7V for x16 mode selection. Leaving ORG unconnected defaults to x16 but is discouraged for 1.8V operation.
Does the AT93C46-10PI-1.8 support write protection?
The AT93C46-10PI-1.8 does not include hardware write-protect pins. Protection is implemented via software protocol: programming instructions (WRITE, ERASE, etc.) are disabled by default after power-on and require explicit EWEN command to enable. Execution of EWDS disables all programming until next power cycle or another EWEN, providing controlled, firmware-managed write security.
Can the AT93C46-10PI-1.8 operate at 5.5V supply?
Yes, the AT93C46-10PI-1.8 supports VCC from 1.8V to 5.5V per absolute maximum ratings and DC characteristics tables. At 5.5V, it achieves 2 MHz clock rate and full AC performance compliance. However, standby current increases to 30 µA (ISB3), and design must ensure all input voltages (VIH/VIL) remain within spec relative to VCC.
Is the AT93C46-10PI-1.8 pin-compatible with AT93C46-10PI-2.7?
Yes, AT93C46-10PI-1.8 and AT93C46-10PI-2.7 share identical PDIP-8 packaging, pinout, and mechanical dimensions. The sole difference is the guaranteed minimum supply voltage: −1.8 suffix supports down to 1.8V, while −2.7 requires ≥2.7V. Both operate up to 5.5V and maintain full functional and timing compatibility across their respective VCC ranges.
What is the maximum capacitive load the DO pin can drive on the AT93C46-10PI-1.8?
The DO pin of the AT93C46-10PI-1.8 is specified with 5 pF maximum output capacitance (COUT) under test conditions (VOUT = 0V, f = 1 MHz, VCC = 5.0V). For reliable timing, total trace + receiver capacitance should remain ≤5 pF. If driving longer traces or multiple loads, external pull-up resistor value must be reduced to maintain tPD0/tPD1 < 1000 ns at 1.8V operation.
AT93C46-10PI-1.8 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:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT93C46-10PI-1.8 FAQ
1.How can I place an order for AT93C46-10PI-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46-10PI-1.8 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-1.8 reliable?
The price and inventory of AT93C46-10PI-1.8 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-1.8 is usually 5 days.
3.What payment methods are accepted for AT93C46-10PI-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46-10PI-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46-10PI-1.8?
AT93C46-10PI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46-10PI-1.8 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-1.8?
For technical support, including AT93C46-10PI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46-10PI-1.8 requirements.
6.How does Aetrix verify that AT93C46-10PI-1.8 is sourced from the original manufacturer or authorized distributors?
All AT93C46-10PI-1.8 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-1.8 meets industry standards.
7.What is the process for return or replacement of AT93C46-10PI-1.8?
All AT93C46-10PI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46-10PI-1.8, 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-1.8 part is unused and in its original packaging.
Return procedure for AT93C46-10PI-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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