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Microchip Technology AT93C46A-10PI-1.8
- Part No.:
- AT93C46A-10PI-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT93C46A-10PI-1.8.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 2MHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,992
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Product details
Overview
AT93C46A-10PI-1.8 from Microchip Technology (formerly Atmel) is a 1K-bit, 64-word × 16-bit serial EEPROM with three-wire interface, optimized for low-voltage embedded systems. It operates from 1.8V to 5.5V, supports 2 MHz clock rate at 5V, features self-timed write cycles (≤10 ms), and delivers 1 million write endurance and 100-year data retention. Used in industrial control modules for parameter storage and calibration data retention.
For engineers reviewing the AT93C46A-10PI-1.8 datasheet, AT93C46A-10PI-1.8 pinout, AT93C46A-10PI-1.8 application, or AT93C46A-10PI-1.8 equivalent, key selection considerations include its 1.8V–5.5V supply range, PDIP-8 package, three-wire serial protocol compatibility, and automotive-grade temperature support (−40°C to +85°C).
Technical Context
The AT93C46A-10PI-1.8 implements a synchronous three-wire serial interface with Chip Select (CS), Serial Clock (SK), and bidirectional Data I/O (DI/DO). Its instruction set includes READ, WRITE, ERASE, EWEN/EWDS, and bulk operations (ERAL/WRAL), all initiated by a start bit followed by opcode and address.
It uses internal address decoding and output buffering to deliver 16-bit data synchronized to SK rising edges, with ready/busy status reported on DO when CS is asserted post-write. The device enters Erase/Write Disable state on power-up and requires explicit EWEN before programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (64 × 16-bit words) - fixed organization; no byte-addressable access |
| Supply Voltage Range | 1.8V to 5.5V - enables direct interfacing with 1.8V logic and mixed-voltage systems |
| Interface Protocol | Three-wire serial (CS/SK/DI/DO) - minimal GPIO usage; no SPI mode select or chip-select polarity ambiguity |
| Max Clock Frequency | 2 MHz at VCC = 5V - supports fast read/write throughput in high-speed microcontroller systems |
| Write Cycle Time | ≤10 ms (self-timed) - eliminates external timing control; busy polling via DO pin required |
| Endurance & Retention | 1 million write cycles / 100-year data retention - suitable for field-updatable firmware configuration storage |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive under-hood applications |
Pinout & Package
AT93C46A-10PI-1.8 is supplied in an 8-lead PDIP (Plastic Dual Inline Package) with 0.300" body width, compatible with through-hole PCB assembly and legacy socketing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must be held low for entire instruction cycle; controls DO tri-state behavior |
| SK | Serial Clock | Input-only; rising edge samples DI and clocks DO; timing critical for tSKH/tSKL compliance |
| DI | Data Input | Serial instruction/address/data input; latched on SK rising edge; requires tDIS/tDIH setup/hold |
| DO | Data Output | Tri-state serial output; reports data during READ or ready/busy status post-write |
| GND | Ground Reference | Return path for VCC and signal I/O; must be low-impedance for noise immunity |
| VCC | Power Supply | Single supply input (1.8–5.5V); powers internal logic and charge pump for write/erase |
| NC | No Connect | Internally unconnected pin; must remain floating or tied to GND per layout best practice |
| DC | Device Code | Factory-programmed identification pin; used for device family verification in multi-device systems |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | 1.8V minimum VCC enables integration with ultra-low-power MCUs and battery-backed systems |
| Self-Timed Write Cycle | Eliminates need for external write-timing circuitry; status queried via DO pin after CS assertion |
| Three-Wire Interface | Reduces MCU pin count vs. SPI; avoids MISO/MOSI direction control complexity |
| Automotive-Grade Qualification | Meets extended temperature and reliability requirements for engine control units and ADAS subsystems |
| Lead-Free/Halogen-Free | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profiles |
Applications
| Industrial Sensor Calibration | Consumer Appliance Settings |
|---|---|
Use Scenario: Storing factory-trimmed sensor offset/gain coefficients and user-adjusted thresholds in pressure or temperature transmitters. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed during power-up initialization and runtime recalibration. Use Value: Enables field-replaceable sensor modules without firmware reprogramming; retains settings across 10+ year product lifecycles. | Use Scenario: Saving user preferences (e.g., cooking time, temperature, delay) in microwave ovens and washing machines. IC Role / Device Role / Timing Role: Low-pin-count serial EEPROM interfaced to 8-bit MCU GPIOs with minimal board space. Use Value: Supports >1M power-cycle save events without degradation; operates reliably at 1.8V during brown-out conditions. |
| Automotive Body Control Module | Medical Diagnostic Equipment |
Use Scenario: Storing seat/mirror position memory, lighting profiles, and fault log history in vehicle BCMs. IC Role / Device Role / Timing Role: Automotive-grade nonvolatile memory with −40°C to +85°C operation and AEC-Q100 alignment. Use Value: Survives under-hood thermal cycling; retains critical safety-related configuration after battery disconnect. | Use Scenario: Archiving calibration constants and regulatory audit logs in portable ultrasound and ECG devices. IC Role / Device Role / Timing Role: Tamper-resistant, long-retention memory for FDA 21 CFR Part 11-compliant data integrity. Use Value: Guarantees 100-year data retention without refresh; supports traceable calibration chain documentation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95128-DRMN6TP/K | 128 Kbit SPI interface; 2.5–5.5V supply; 20 MHz max clock; WLCSP-8 package | Higher density and faster interface but requires SPI-capable host and different pinout | Select when system already uses SPI peripherals and needs >1K memory; not pin-compatible |
| BR24G02FJ-WE2 | 2 Kbit I²C interface; 1.7–5.5V supply; 1 MHz max clock; TSSOP-8 package | I²C protocol reduces wiring vs. three-wire but adds address arbitration and ACK overhead | Prefer for I²C-bus systems with multiple slaves; requires pull-up resistors and ACK handling logic |
Compared with M95128-DRMN6TP/K and BR24G02FJ-WE2, the AT93C46A-10PI-1.8 offers deterministic three-wire timing, lowest voltage operation (1.8V), and proven PDIP compatibility for legacy industrial designs - making it optimal where pin count, voltage headroom, and through-hole assembly are constraints.
Availability
AT93C46A-10PI-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer appliance settings, and automotive body control modules requiring stable component supply and long-term obsolescence management.
Supply support for AT93C46A-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 specializing in microcontrollers, analog components, and nonvolatile memory solutions for industrial, automotive, and communications markets.
The AT93C46A-10PI-1.8 belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-pin-count embedded systems needing reliable, low-voltage nonvolatile storage without complex interface logic.
FAQ
What is the operating voltage range of the AT93C46A-10PI-1.8?
The AT93C46A-10PI-1.8 operates from 1.8V to 5.5V, supporting both low-voltage microcontrollers and mixed-supply systems. This range is explicitly defined in the "−1.8" suffix variant and verified in Table 3 of the datasheet under VCC1. It does not support sub-1.8V operation, and exceeding 5.5V risks permanent damage per Absolute Maximum Ratings.
Does the AT93C46A-10PI-1.8 require an external erase command before writing?
No, the AT93C46A-10PI-1.8 does not require a separate erase command before writing. Each WRITE instruction automatically erases and programs the target 16-bit word in a single self-timed cycle (≤10 ms). However, the device must first be placed in Erase/Write Enable (EWEN) state; otherwise, WRITE commands are ignored until EWEN is issued.
What package type is used for the AT93C46A-10PI-1.8?
The AT93C46A-10PI-1.8 uses an 8-lead PDIP (Plastic Dual Inline Package) with 0.300" body width, designated as package code "8P3" in Microchip's ordering information. This through-hole package supports manual soldering, socket-based prototyping, and legacy industrial PCB layouts.
How is ready/busy status monitored during a write cycle on the AT93C46A-10PI-1.8?
During a write cycle, the AT93C46A-10PI-1.8 outputs ready/busy status on the DO pin. After initiating a WRITE, if CS is driven high for ≥250 ns (tCS), DO transitions to logic "0" (busy) and returns to logic "1" (ready) upon completion. This polling method replaces fixed-delay timing and ensures robust synchronization across voltage and temperature variations.
Is the AT93C46A-10PI-1.8 pin-compatible with other variants in the AT93C46A family?
Yes, the AT93C46A-10PI-1.8 shares identical pinout and footprint with all AT93C46A variants including -10PI-2.7, -10SI-1.8, and -10TI-1.8. All use the same 8-lead PDIP/SOIC/TSSOP packages and functionally identical three-wire interface. Only the supply voltage range (1.8V vs. 2.7V min) and packaging differ - electrical and timing behavior remains consistent within their respective VCC ranges.
AT93C46A-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
AT93C46A-10PI-1.8 FAQ
1.How can I place an order for AT93C46A-10PI-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46A-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 AT93C46A-10PI-1.8 reliable?
The price and inventory of AT93C46A-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 AT93C46A-10PI-1.8 is usually 5 days.
3.What payment methods are accepted for AT93C46A-10PI-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46A-10PI-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46A-10PI-1.8?
AT93C46A-10PI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46A-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 AT93C46A-10PI-1.8?
For technical support, including AT93C46A-10PI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46A-10PI-1.8 requirements.
6.How does Aetrix verify that AT93C46A-10PI-1.8 is sourced from the original manufacturer or authorized distributors?
All AT93C46A-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 AT93C46A-10PI-1.8 meets industry standards.
7.What is the process for return or replacement of AT93C46A-10PI-1.8?
All AT93C46A-10PI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46A-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 AT93C46A-10PI-1.8 part is unused and in its original packaging.
Return procedure for AT93C46A-10PI-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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