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Microchip Technology AT93C46-10PU-1.8
- Part No.:
- AT93C46-10PU-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT93C46-10PU-1.8.pdf
- Description:
- IC EEPROM 1KBIT 3-WIRE 2MHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,409
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Product details
Overview
AT93C46-10PU-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 1.8 V to 5.5 V, featuring 2 MHz clock rate at 5 V, 10 ms max self-timed write cycle, and automotive-grade reliability for industrial control and embedded configuration storage.
For engineers reviewing the AT93C46-10PU-1.8 datasheet, AT93C46-10PU-1.8 pinout, AT93C46-10PU-1.8 application, or AT93C46-10PU-1.8 equivalent, this page delivers verified electrical specs, package mapping, functional timing behavior, and real-world use context - all confirmed against the official Rev. 0172Y–SEEPR–11/04 datasheet.
Technical Context
The AT93C46-10PU-1.8 implements a synchronous three-wire interface (CS/SK/DI/DO) with ORG pin-controlled memory organization, supporting both x8 and x16 modes. Its instruction set includes READ, WRITE, ERASE, EWEN/EWDS, and bulk operations (ERAL/WRAL), all validated across 1.8 V–5.5 V supply range.
It features status feedback via DO during write/erase cycles, high-impedance output disable on CS high, and internal pull-up on ORG (x16 default if unconnected). The device requires no external erase cycle and supports Ready/Busy polling through DO after CS assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 × 8 or 64 × 16 organization selectable via ORG pin) |
| Supply Voltage Range | 1.8 V to 5.5 V - enables direct interfacing with 1.8 V logic and mixed-voltage systems |
| Max Clock Frequency | 2 MHz at VCC = 5 V - defines maximum serial data throughput in read/write operations |
| Write Cycle Time | 10 ms maximum - determines minimum time between successive write commands |
| Endurance & Retention | 1 million write cycles / 100 years data retention - ensures long-term reliability in field-deployed firmware/config storage |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive under-hood environments |
| Interface Protocol | Three-wire serial (CS/SK/DI/DO) - reduces PCB routing complexity vs. SPI/I²C, no address lines required |
Pinout & Package
AT93C46-10PU-1.8 is supplied in an 8-lead PDIP (8P3) package: 0.300" wide, through-hole, lead-free/halogen-free, with standard JEDEC pinout and 0.100" lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; initiates instruction decode and controls DO high-impedance state |
| SK | Serial Clock | Synchronizes all data transfers; rising edge latches DI, falling edge samples DO |
| DI | Data Input | Receives start bit, op code, address, and write data; must meet tDIS/tDIH setup/hold timing |
| DO | Data Output | Outputs read data or Ready/Busy status; tri-states when CS is high |
| GND | Ground Reference | Return path for VCC and signal currents; must be low-impedance for noise immunity |
| VCC | Power Supply | 1.8 V–5.5 V input; powers internal logic and EEPROM array; decoupling capacitor required |
| ORG | Organization Select | High = 64 × 16 mode; low = 128 × 8 mode; unconnected defaults to x16 (via internal ~1 MΩ pull-up) |
| DC | Don't Connect | No internal connection; must be left floating or tied to GND/VCC per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Supports either 128 × 8 or 64 × 16 layout via ORG pin - simplifies firmware compatibility across legacy and new designs |
| Self-timed write/erase | No external timing control needed; DO provides Ready/Busy status - eliminates need for fixed delay loops in host firmware |
| Low-power standby | 0.1 µA max ISB1 at 1.8 V - enables battery-backed operation in always-on IoT nodes and energy-harvesting systems |
| Automotive-grade qualification | −40°C to +85°C operation with lead-free/halogen-free packaging - meets AEC-Q200 stress test requirements for industrial modules |
| Three-wire minimal interface | Only CS, SK, DI, DO signals required - reduces MCU GPIO usage and PCB layer count vs. parallel or SPI EEPROMs |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing calibration offsets, sensor compensation tables, and I/O mapping in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent settings updated infrequently during commissioning or maintenance. Use Value: Ensures deterministic startup behavior after power loss; 100-year retention prevents field recalibration drift over equipment lifetime. |
Use Scenario: Saving seat position memory, mirror angle presets, and lighting profiles in vehicle body control units. IC Role / Device Role / Timing Role: Low-voltage EEPROM interfaced directly to 1.8 V microcontroller GPIOs for secure, tamper-resistant user preference storage. Use Value: 1.8 V operation eliminates level-shifting circuitry; automotive temperature rating guarantees reliability across engine bay thermal cycling. |
| Medical Infusion Pump Parameter Backup | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Retaining drug delivery parameters, alarm thresholds, and audit logs in Class II medical devices requiring regulatory-compliant data persistence. IC Role / Device Role / Timing Role: Safety-critical nonvolatile memory storing immutable operational limits and event history with write-protection via EWDS. Use Value: 1 million endurance cycles support daily calibration updates; 100-year retention satisfies FDA 21 CFR Part 11 long-term recordkeeping mandates. |
Use Scenario: Holding firmware patch images and cryptographic keys in utility-grade smart meters deployed for >15-year field life. IC Role / Device Role / Timing Role: Secure boot-time configuration store accessed only during OTA update verification and key loading sequences. Use Value: Lead-free/halogen-free packaging complies with RoHS/WEEE directives; 1.8 V–5.5 V range supports brown-out tolerant meter SoCs. |
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-10PU-1.8 | Enhanced version with improved ORG pin behavior: x16 mode guaranteed even with unconnected ORG; tighter AC timing specs. | Preferred for new designs requiring robust x16 default behavior without external pull-up; same pinout and voltage range. | Select AT93C46A-10PU-1.8 when ORG pin reliability is critical and design starts post-2004; backward-compatible but not drop-in for legacy ORG-floating layouts. |
| ON Semiconductor CAT93C46VI-GT3 | Pin-compatible 1K serial EEPROM; 1.8 V–5.5 V operation; 1 MHz max clock at 1.8 V; 1M endurance/100y retention. | Valid alternative where lower clock speed is acceptable; identical PDIP-8 footprint and instruction set. | Choose CAT93C46VI-GT3 for cost-sensitive industrial BOMs with existing 1 MHz timing margins; verify DO status polling behavior matches host firmware. |
Compared with AT93C46-10PU-1.8, the AT93C46A-10PU-1.8 improves ORG pin robustness for x16 mode, while CAT93C46VI-GT3 offers second-source availability at slightly reduced speed - both retain identical memory size, voltage range, and industrial temperature rating.
Availability
AT93C46-10PU-1.8 is available at Aetrix Electronics and suitable for industrial PLC configuration storage, automotive BCM parameter backup, medical infusion pump parameter retention, and smart energy meter firmware patch storage requiring stable component supply across extended product lifecycles.
Supply support for AT93C46-10PU-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, FPGA, and memory solutions, with deep expertise in embedded control and nonvolatile storage.
The AT93C46-10PU-1.8 belongs to Microchip's legacy serial EEPROM family designed for low-pin-count, low-power configuration storage in space-constrained industrial and automotive systems - emphasizing simplicity, reliability, and broad voltage compatibility.
FAQ
What is the memory organization of AT93C46-10PU-1.8?
The AT93C46-10PU-1.8 supports two configurations: 128 words × 8 bits or 64 words × 16 bits, selected by the ORG pin voltage. When ORG is high (VCC), it operates in 64 × 16 mode; when low (GND), it uses 128 × 8 mode. If left unconnected, the internal ~1 MΩ pull-up selects x16 mode - though Microchip recommends AT93C46A-10PU-1.8 for guaranteed x16 behavior in new designs.
Does AT93C46-10PU-1.8 require an external erase cycle before writing?
No, AT93C46-10PU-1.8 does not require a separate erase cycle. Each WRITE instruction automatically erases the target location before programming, and the entire process is self-timed (≤10 ms). The ERASE instruction is optional and used only for selective location clearing; bulk ERAL/WRAL commands are valid only at 4.5 V–5.5 V.
What is the maximum clock frequency supported by AT93C46-10PU-1.8?
The AT93C46-10PU-1.8 supports up to 2 MHz SK clock frequency at VCC = 5.0 V. At 1.8 V, the maximum clock rate drops to 0.25 MHz per Table 4 in the datasheet. Timing parameters including tSKH, tSKL, and tCS scale accordingly - design must comply with voltage-specific AC characteristics to ensure reliable communication.
How is Ready/Busy status monitored during a write cycle on AT93C46-10PU-1.8?
During a WRITE or ERASE cycle, the DO pin outputs Ready/Busy status when CS is brought high after ≥250 ns low time (tCS). A logic "1" on DO indicates completion and readiness for next instruction; a logic "0" means the operation is still in progress. This polling mechanism avoids fixed delays and adapts to actual write time variation across temperature and voltage.
Is AT93C46-10PU-1.8 compatible with 1.8 V microcontrollers?
Yes, AT93C46-10PU-1.8 is fully compatible with 1.8 V microcontrollers: its VCC range is 1.8 V–5.5 V, VIH2 and VIL2 thresholds are defined for 1.8 V ≤ VCC ≤ 2.7 V, and it draws only 0.1 µA standby current at 1.8 V. Interface timing (e.g., tDIS = 400 ns max) remains valid at 1.8 V, enabling direct GPIO connection without level shifters.
AT93C46-10PU-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
AT93C46-10PU-1.8 FAQ
1.How can I place an order for AT93C46-10PU-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C46-10PU-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 AT93C46-10PU-1.8 reliable?
The price and inventory of AT93C46-10PU-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 AT93C46-10PU-1.8 is usually 5 days.
3.What payment methods are accepted for AT93C46-10PU-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C46-10PU-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C46-10PU-1.8?
AT93C46-10PU-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C46-10PU-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 AT93C46-10PU-1.8?
For technical support, including AT93C46-10PU-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C46-10PU-1.8 requirements.
6.How does Aetrix verify that AT93C46-10PU-1.8 is sourced from the original manufacturer or authorized distributors?
All AT93C46-10PU-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 AT93C46-10PU-1.8 meets industry standards.
7.What is the process for return or replacement of AT93C46-10PU-1.8?
All AT93C46-10PU-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C46-10PU-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 AT93C46-10PU-1.8 part is unused and in its original packaging.
Return procedure for AT93C46-10PU-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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