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Microchip Technology 93AA46BXT-I/SN
- Part No.:
- 93AA46BXT-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93AA46BXT-I/SN.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,916
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Product details
Overview
93AA46BXT-I/SN from Microchip Technology Inc. is a 1 Kbit (128 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 1.8–5.5 V supply range, industrial temperature rating (–40°C to +85°C), and 1 million erase/write cycles. It operates in dedicated 8-bit organization (no ORG pin), features automatic erase-before-write, power-on/off data protection, and Ready/Busy status signaling via DO pin - used for configuration storage in embedded microcontroller systems.
For engineers reviewing the 93AA46BXT-I/SN datasheet, 93AA46BXT-I/SN pinout, 93AA46BXT-I/SN application, or 93AA46BXT-I/SN equivalent, key selection criteria include its 8-bit fixed-word serial interface, SOIC-8 package compatibility, 2.5 µA standby current at 2.5 V, self-timed 6 ms write cycle, and RoHS-compliant Pb-free Matte Tin finish.
Technical Context
The 93AA46BXT-I/SN implements a synchronous serial Microwire protocol with CS/CLK/DI/DO signals and no ORG pin - confirming fixed 128 × 8-bit memory mapping. Its internal logic enforces power-on write protection, requiring explicit EWEN command before any erase or write operation, and supports sequential read mode when CS remains asserted.
Timing is governed by strict AC parameters: max 3 MHz clock frequency at VCC ≥ 4.5 V, 200 ns data output delay (TPD), and 250 ns minimum CS low time (TCSL) between instructions. The device enters High-Z on DO during standby and asserts Ready/Busy status only after CS high following TCSL, enabling polling-based firmware control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Kbit (128 words × 8 bits) - fixed x8 organization, no word-size reconfiguration |
| Supply voltage | 1.8 V to 5.5 V - supports wide-range battery-powered and mixed-voltage embedded systems |
| Write endurance | 1,000,000 cycles - enables long-term field calibration or event logging without wear-out concerns |
| Data retention | 200 years at 25°C - ensures nonvolatile storage integrity across product lifecycle |
| Standby current | 1 µA (typical) at I-temp - critical for ultra-low-power sleep modes in portable devices |
| Write cycle time | 6 ms (typical) - self-timed auto-erase-and-write eliminates need for external timing control |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - minimal GPIO usage, no address bus required |
Pinout & Package
93AA46BXT-I/SN is packaged in 8-lead SOIC (SN) with Pb-free Matte Tin finish. Pin 1 is CS, Pin 2 is CLK, Pin 3 is DI, Pin 4 is DO, Pin 5 is VSS, Pin 6 is NC (no internal connection), Pin 7 is NC, and Pin 8 is VCC. The ORG pin is absent - consistent with 'A'-suffix devices specifying fixed 8-bit organization.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select | Active-high enable; must be held low ≥250 ns between commands; initiates self-timed write on falling edge |
| CLK (Pin 2) | Serial Clock | Synchronizes all data transfers on rising edge; stoppable at any point without state corruption |
| DI (Pin 3) | Data Input | Accepts Start bit, opcode, address, and write data; requires stable setup/hold per AC specs |
| DO (Pin 4) | Data Output / Status | Outputs read data or Ready/Busy signal (low = busy); enters High-Z when CS low |
| VSS (Pin 5) | Ground | Reference for all digital and analog circuitry; must be low-impedance return path |
| NC (Pin 6, 7) | No Connection | Internally unconnected; may be left floating or tied to ground per layout best practice |
| VCC (Pin 8) | Power Supply | Supplies core logic and memory array; includes internal POR detection at ~1.5 V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates external timing circuitry - firmware only polls DO for completion, reducing code complexity |
| Automatic ERAL before WRAL | Ensures full-array write reliability without separate erase command, simplifying bulk update routines |
| Power-on/off data protection | Hardware-level lockout below 1.5 V VCC prevents corruption during brownout or power ramp-up |
| Ready/Busy status on DO | Enables efficient polling instead of fixed delays, optimizing system response time and power use |
| RoHS-compliant Pb-free finish | Meets global environmental regulations and supports lead-free reflow soldering processes |
Applications
| Industrial Sensor Calibration | Consumer Remote Control Memory |
|---|---|
Use Scenario: Storing factory-trimmed sensor offset/gain coefficients and user-adjusted calibration values in temperature/humidity sensors. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during MCU boot and runtime recalibration sequences. Use Value: Enables field-updatable calibration without firmware changes; 200-year retention guarantees accuracy over equipment lifetime. | Use Scenario: Retaining IR code learning history, button mapping preferences, and volume settings in universal remote controls. IC Role / Device Role / Timing Role: Low-pin-count serial storage interfaced directly to 8-bit microcontroller GPIOs with minimal board space. Use Value: 1.8 V operation extends battery life; 1 µA standby current minimizes drain during idle periods. |
| Medical Device Configuration | Automotive Body Control Module |
Use Scenario: Saving user-defined therapy parameters, alarm thresholds, and device ID in portable medical monitors. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage with hardware write-protection (EWEN/EWDS) activated on power-up. Use Value: Prevents accidental overwrite during power transitions; 1M endurance supports frequent parameter updates. | Use Scenario: Storing seat/mirror position presets, lighting profiles, and diagnostic fault logs in automotive BCMs. IC Role / Device Role / Timing Role: Industrial-grade EEPROM qualified for –40°C to +85°C ambient, interfacing via Microwire to 8/16-bit MCUs. Use Value: SOIC-8 package allows drop-in replacement in legacy designs; RoHS compliance meets automotive material requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC46A-I/SN | Same 128 × 8-bit organization, but 2.5–5.5 V VCC range - lacks 1.8 V support | Not suitable for sub-2.5 V battery systems; otherwise pin- and function-compatible | Select if operating exclusively above 2.5 V and cost optimization is prioritized |
| AT25010B-SSHL-T | 1 Kbit SPI EEPROM (not Microwire), 1.8–5.5 V, 20 MHz SPI clock, different instruction set | Requires SPI driver adaptation; no Ready/Busy polling - uses WIP flag in status register | Choose for higher-speed communication where SPI infrastructure already exists |
Compared with 93LC46A-I/SN, the 93AA46BXT-I/SN offers broader low-voltage operation down to 1.8 V and tighter standby current spec; versus AT25010B-SSHL-T, it retains Microwire simplicity and hardware-ready/busy signaling but trades off maximum clock speed for deterministic timing control.
Availability
93AA46BXT-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer remote control memory, medical device configuration, and automotive body control module applications requiring stable component supply, long-term obsolescence management, and RoHS-compliant sourcing.
Supply support for 93AA46BXT-I/SN 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 microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93AAxx series was designed specifically for low-power, cost-sensitive embedded systems requiring reliable serial nonvolatile storage with minimal pin count and robust power-supply immunity.
FAQ
What is the memory organization of the 93AA46BXT-I/SN?
The 93AA46BXT-I/SN has a fixed 128 × 8-bit (1 Kbit) organization. As an 'A'-suffix device, it does not include an ORG pin and is permanently configured for 8-bit word access - unlike 'C'-suffix variants that support configurable 8/16-bit modes via the ORG pin.
Does the 93AA46BXT-I/SN require an external pull-up resistor on the DO pin?
No, the 93AA46BXT-I/SN does not require an external pull-up on DO. The DO pin actively drives high/low during read or Ready/Busy status reporting and enters High-Z when CS is low. A pull-up is unnecessary unless interfacing with open-drain buses or specific level-shifting topologies.
How is write protection implemented on the 93AA46BXT-I/SN?
Write protection on the 93AA46BXT-I/SN is implemented through Erase/Write Enable (EWEN) and Disable (EWDS) commands. The device powers up in EWDS mode, blocking all erase/write operations until EWEN is issued. After each write, executing EWDS restores protection - preventing accidental overwrites during noise events or power glitches.
What is the maximum clock frequency supported by the 93AA46BXT-I/SN at 3.3 V?
At VCC = 3.3 V, the 93AA46BXT-I/SN supports a maximum clock frequency of 2 MHz. This is specified in Table 1-2 (A1) for the 2.5 V ≤ VCC < 4.5 V range. Exceeding this frequency risks setup/hold violations and unreliable command execution.
Can the 93AA46BXT-I/SN be used in place of the 93AA46A-I/SN?
Yes, the 93AA46BXT-I/SN is functionally identical to the 93AA46A-I/SN in memory organization, pinout, and electrical specifications. The 'B' in the part number reflects packaging (SOIC-8 = SN) and temperature grade (I), not functional difference - both are 128 × 8-bit 'A'-type devices.
93AA46BXT-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Kbit
- Memory Organization:
- 64 x 16
- Memory Interface:
- Microwire
- Clock Frequency:
- 2 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-SOIC
93AA46BXT-I/SN FAQ
1.How can I place an order for 93AA46BXT-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA46BXT-I/SN 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 93AA46BXT-I/SN reliable?
The price and inventory of 93AA46BXT-I/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93AA46BXT-I/SN is usually 5 days.
3.What payment methods are accepted for 93AA46BXT-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA46BXT-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA46BXT-I/SN?
93AA46BXT-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA46BXT-I/SN 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 93AA46BXT-I/SN?
For technical support, including 93AA46BXT-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA46BXT-I/SN requirements.
6.How does Aetrix verify that 93AA46BXT-I/SN is sourced from the original manufacturer or authorized distributors?
All 93AA46BXT-I/SN 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 93AA46BXT-I/SN meets industry standards.
7.What is the process for return or replacement of 93AA46BXT-I/SN?
All 93AA46BXT-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93AA46BXT-I/SN, 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 93AA46BXT-I/SN part is unused and in its original packaging.
Return procedure for 93AA46BXT-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93AA46BXT-I/SN Tags
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AT24C02C-XHM-T
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