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Microchip Technology 93AA46CT-I/MS
- Part No.:
- 93AA46CT-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
93AA46CT-I/MS.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,311
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Product details
Overview
93AA46CT-I/MS from Microchip Technology Inc. is a 1 Kbit low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 128 × 8-bit organization (no ORG pin), 1.8–5.5 V supply range, and industrial temperature rating (−40°C to +85°C) in an 8-lead MSOP package. It delivers self-timed erase/write cycles, automatic ERAL/WRAL support, and 1 million endurance cycles for nonvolatile configuration storage in embedded controllers.
For engineers reviewing the 93AA46CT-I/MS datasheet, 93AA46CT-I/MS pinout, 93AA46CT-I/MS application, or 93AA46CT-I/MS equivalent, key selection criteria include voltage compatibility (1.8–5.5 V), 8-bit serial interface timing compliance, standby current ≤5 µA, data retention >200 years, and MSOP package footprint constraints in space-constrained PCB layouts.
Technical Context
This device implements a synchronous serial Microwire protocol with CS/CLK/DI/DO signaling and no ORG pin-fixed 8-bit word size per the 'A' suffix. It uses internal auto-erase before write and supports ERAL (Erase All) and WRAL (Write All) commands with dedicated opcodes and status polling via DO pin.
Power-on reset logic enforces write protection below 1.5 V VCC; EWEN/EWDS commands control programming enable state, and Ready/Busy status is asserted on DO during TWC (6 ms typical) erase/write operations-requiring CS high ≥250 ns after TCSL to sample.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Kbit (128 × 8-bit organization) |
| VCC range | 1.8 V to 5.5 V - supports single-supply operation across battery-powered and 3.3/5 V systems |
| Endurance | 1,000,000 erase/write cycles - enables frequent firmware/config updates in field-deployed devices |
| Data retention | >200 years at 25°C - ensures long-term reliability without refresh in unpowered storage |
| Write cycle time | 6 ms typical - defines minimum interval between successive write commands |
| Standby current | ≤5 µA at I-temp - critical for ultra-low-power sleep modes in portable electronics |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - interoperable with legacy microcontrollers lacking SPI hardware |
Pinout & Package
The 93AA46CT-I/MS is housed in an 8-lead MSOP (Mini Small Outline Package) with 0.65 mm pitch, 3.0 × 3.0 mm body, and exposed pad option (not connected by default). Pin 1 is marked by laser indentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions to reset internal logic |
| CLK | Serial Clock | Positive-edge synchronous clock; stops/resumes freely without disrupting state machine |
| DI | Data Input | Accepts Start bit, opcode, address, and data; requires external pull-down on CS per datasheet guidance |
| DO | Data Output / Status | Tri-state output delivering read data or Ready/Busy (low = busy); enters High-Z on CS falling edge |
| VSS | Ground | Reference return path for all signals; tied to exposed pad if used |
| NC | No Connection | Pin 7 is unconnected internally - must be left floating or grounded per layout best practice |
| VCC | Power Supply | 1.8–5.5 V input; includes internal POR detection at 1.5 V threshold |
| ORG | Organization select | Not present on 'A' devices - permanently disabled; pin 6 is NC for 93AA46CT-I/MS |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control - simplifies firmware driver implementation |
| Automatic ERAL before WRAL | Guarantees full-array readiness prior to bulk write - prevents partial-write corruption |
| Power-on/off data protection | Hardware lockout below 1.5 V VCC - prevents inadvertent writes during brown-out conditions |
| Ready/Busy status on DO | Enables polling-based write completion detection without interrupt or timer overhead |
| Industry-standard 3-wire interface | Reduces GPIO count vs. SPI - ideal for microcontrollers with limited peripheral resources |
Applications
| Industrial Sensor Calibration | Consumer Remote Control Memory |
|---|---|
Use Scenario: Storing factory-trimmed sensor offset/gain coefficients in HVAC temperature sensors operating at −25°C to +70°C. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed once per power-up via MCU's GPIO-banged Microwire interface. Use Value: 1.8 V minimum VCC allows direct connection to Li-ion battery rails; 1M endurance supports recalibration during service life. | Use Scenario: Retaining user-programmed channel presets and backlight brightness settings in IR remote controls. IC Role / Device Role / Timing Role: Low-power serial EEPROM interfaced to 8-bit MCU with no dedicated SPI peripheral. Use Value: 5 µA standby current extends alkaline battery life beyond 2 years; MSOP package fits compact 12 mm × 25 mm PCB. |
| Medical Diagnostic Device Settings | Automotive Body Control Module |
Use Scenario: Saving operator-selected test parameters and calibration history in portable blood glucose meters. IC Role / Device Role / Timing Role: Secure configuration store accessed only during setup mode; write-protected by EWDS after initialization. Use Value: >200-year data retention ensures lifetime validity of stored medical records without backup power. | Use Scenario: Holding door lock timeout values and mirror position memory in 12 V automotive BCMs with 5 V LDO supply. IC Role / Device Role / Timing Role: Robust nonvolatile memory tolerant of load-dump transients and cold-crank voltage dips. Use Value: 5.5 V max VCC accommodates automotive 5 V rail tolerances; industrial temp grade covers under-hood ambient extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC46AT-I/MS | 2.5–5.5 V VCC range; identical 128×8 organization and MSOP package | Requires ≥2.5 V system rail - unsuitable for 1.8 V or dual-supply designs | Select when higher VCC stability is available and tighter VCC tolerance is acceptable |
| AT25010B-MAHL-T | SPI interface (4-wire), 1 MHz max clock, 1.8–5.5 V, SOIC-8 package | Requires dedicated SPI peripheral and extra chip-select line; different timing and command set | Choose for SPI-native systems where firmware reuse outweighs pin-count penalty |
Compared with 93LC46AT-I/MS, the 93AA46CT-I/MS enables lower-voltage operation down to 1.8 V while retaining identical pinout and instruction set; versus AT25010B-MAHL-T, it reduces GPIO usage by one line but requires bit-banged Microwire timing control instead of hardware SPI acceleration.
Availability
93AA46CT-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer remote control memory, medical diagnostic device settings, and automotive body control module applications requiring stable component supply, long-term obsolescence management, and RoHS-compliant packaging.
Supply support for 93AA46CT-I/MS 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 Inc. is a leading provider of microcontroller, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93XX46 series was designed specifically for cost-sensitive, low-power serial EEPROM applications in embedded systems where Microwire compatibility, wide VCC range, and proven data integrity are essential.
FAQ
What is the memory organization of the 93AA46CT-I/MS?
The 93AA46CT-I/MS has a fixed 128 × 8-bit organization. As an 'A'-suffix device, it does not include an ORG pin and operates exclusively in 8-bit word mode-unlike 'C'-suffix variants that support configurable 8/16-bit operation via the ORG pin. This simplifies interface logic in systems requiring byte-aligned access only.
Does the 93AA46CT-I/MS require an external pull-up or pull-down resistor on the CS pin?
Yes, Microchip recommends a 10 kΩ external pull-down resistor on the CS pin of the 93AA46CT-I/MS for added protection against accidental writes during power-up or noise events. This ensures the device remains deselected until intentionally enabled by the host controller, complementing the internal EWDS default state.
How is Ready/Busy status monitored on the 93AA46CT-I/MS?
Ready/Busy status is monitored on the DO pin of the 93AA46CT-I/MS: DO outputs low during active erase/write cycles and goes high upon completion. To sample status, CS must be brought high for ≥250 ns after TCSL, then the host reads DO-no additional clocking is required beyond standard Microwire timing.
What is the maximum clock frequency supported by the 93AA46CT-I/MS at 3.3 V VCC?
At 3.3 V VCC, the 93AA46CT-I/MS supports a maximum clock frequency of 2 MHz. This is specified in Table 1-2 (A1) for the 2.5 V ≤ VCC < 5.5 V range. Exceeding this frequency risks setup/hold violations and unreliable command execution, especially under worst-case temperature and voltage conditions.
Is the ORG pin functional on the 93AA46CT-I/MS?
No, the ORG pin is not functional on the 93AA46CT-I/MS. As a member of the 'A' device family, it has no internal connection to the ORG function-pin 6 is designated NC (No Connection) per the datasheet pin table and package diagrams. The memory organization is permanently fixed at 128 × 8 bits.
93AA46CT-I/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Kbit
- Memory Organization:
- 128 x 8, 64 x 16
- Memory Interface:
- Microwire
- Clock Frequency:
- 3 MHz
- Write Cycle Time - Word, Page:
- 6ms
- Access Time:
- -
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
93AA46CT-I/MS FAQ
1.How can I place an order for 93AA46CT-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA46CT-I/MS 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 93AA46CT-I/MS reliable?
The price and inventory of 93AA46CT-I/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93AA46CT-I/MS is usually 5 days.
3.What payment methods are accepted for 93AA46CT-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA46CT-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA46CT-I/MS?
93AA46CT-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA46CT-I/MS 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 93AA46CT-I/MS?
For technical support, including 93AA46CT-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA46CT-I/MS requirements.
6.How does Aetrix verify that 93AA46CT-I/MS is sourced from the original manufacturer or authorized distributors?
All 93AA46CT-I/MS 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 93AA46CT-I/MS meets industry standards.
7.What is the process for return or replacement of 93AA46CT-I/MS?
All 93AA46CT-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 93AA46CT-I/MS, 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 93AA46CT-I/MS part is unused and in its original packaging.
Return procedure for 93AA46CT-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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