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Microchip Technology 93AA46BX-I/SN
- Part No.:
- 93AA46BX-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93AA46BX-I/SN.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,662
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Product details
Overview
93AA46BX-I/SN from Microchip Technology Inc. is a 1 Kbit low-voltage serial EEPROM with 128 × 8-bit organization, Microwire-compatible 3-wire interface (CS/CLK/DI/DO), and industrial temperature range (–40°C to +85°C). It features self-timed erase/write cycles, automatic ERAL before WRAL, power-on/off data protection, and >200 years data retention. Used for configuration storage in microcontroller-based embedded systems requiring nonvolatile memory with low standby current.
For engineers reviewing the 93AA46BX-I/SN datasheet, 93AA46BX-I/SN pinout, 93AA46BX-I/SN application, or 93AA46BX-I/SN equivalent, key selection criteria include VCC range (1.8–5.5 V), 8-bit fixed word size, SOIC-8 package compatibility, Ready/Busy status signaling via DO, and support for sequential read and auto-erase functionality.
Technical Context
The 93AA46BX-I/SN implements a synchronous serial Microwire interface with start-bit detection, opcode-driven command set (READ/ERASE/WRITE/ERAL/WRAL/EWEN/EWDS), and internal address counter for sequential read. It uses CMOS technology with on-chip voltage detection (VPOR = 1.5 V) and automatic write-enable gating.
It operates exclusively in x8 mode (no ORG pin function), supports up to 3 MHz clock frequency at VCC ≥ 4.5 V, and delivers 1 million erase/write cycles with 100 µA max read current at 2.5 V and 2 MHz. Standby current is ≤5 µA over industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (128 × 8-bit organization, fixed x8 mode) |
| VCC Range | 1.8 V to 5.5 V - enables direct interfacing with 1.8 V, 3.3 V, and 5 V logic systems without level shifters |
| Clock Frequency | Up to 3 MHz at VCC ≥ 4.5 V - supports high-speed configuration reads in resource-constrained MCUs |
| Write Cycle Time | 6 ms typical - defines minimum time between successive WRITE or ERASE commands |
| Data Retention | >200 years at 25°C - ensures long-term reliability in unpowered storage applications |
| Endurance | 1,000,000 erase/write cycles - guarantees robustness for firmware parameter logging or calibration updates |
| Standby Current | ≤5 µA at I-temp - minimizes system power budget in battery-backed or energy-harvesting designs |
Pinout & Package
93AA46BX-I/SN is supplied in an 8-lead SOIC package (SN suffix), 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 not present - consistent with 'A'-suffix devices operating exclusively in 8-bit mode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; initiates self-timed programming on falling edge |
| CLK (Pin 2) | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcodes, addresses, and data; stoppable mid-sequence |
| DI (Pin 3) | Data Input | Receives Start bit, instruction opcodes, address bits, and write data; requires no pull-up when shared with DO (with series resistor) |
| DO (Pin 4) | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z on CS falling edge |
| VSS (Pin 5) | Ground | Reference for all input thresholds and output levels; must be low-impedance connection |
| NC (Pin 6) | No Internal Connection | Not bonded; may be left floating or tied to ground per PCB layout requirements |
| NC (Pin 7) | No Internal Connection | Not bonded; electrically isolated from die; no routing required |
| VCC (Pin 8) | Power Supply | Supplies core and I/O circuitry; internal POR triggers at 1.5 V; must be ≥4.5 V for ERAL/WRAL operations |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write cycles | Eliminates external timing control - simplifies MCU firmware by removing need for cycle-length polling or delay loops |
| Automatic ERAL before WRAL | Ensures full array erasure prior to bulk write - prevents partial-write corruption without host software intervention |
| Power-on/off data protection | Hardware-enforced write inhibition below 1.5 V VCC - prevents inadvertent writes during brown-out or power ramp |
| Ready/Busy status via DO pin | Enables efficient polling instead of fixed delays - reduces worst-case latency and improves system responsiveness |
| Sequential read capability | Allows continuous address increment on single CS assertion - cuts transaction overhead for multi-byte reads |
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 boot and runtime via MCU SPI-like Microwire interface. Use Value: Enables field recalibration without firmware update; retains settings across power cycles with >200-year data retention. | Use Scenario: Holding IR code mappings, button learning history, and device pairing IDs in universal remote controls. IC Role / Device Role / Timing Role: Low-power serial EEPROM interfaced to 8-bit MCU using minimal GPIOs (CS/CLK/DI/DO). Use Value: Supports 1M endurance for frequent user-programming events; 5 µA standby current extends battery life. |
| Medical Device Configuration | Automotive Body Control Module |
Use Scenario: Saving user preferences (e.g., display brightness, alarm thresholds) and regulatory compliance logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage element with hardware write-protection (EWEN/EWDS) and POR lockout. Use Value: Prevents accidental overwrite during power transitions; meets IEC 60601-1 reliability requirements via 1M-cycle endurance. | Use Scenario: Storing seat/mirror position presets, lighting profiles, and fault-code history in automotive interior modules. IC Role / Device Role / Timing Role: Industrial-grade (–40°C to +85°C) serial EEPROM interfaced to body controller MCU via 3-wire bus. Use Value: Operates reliably across automotive thermal cycles; 1.8–5.5 V range accommodates 12 V system rail regulation variations. |
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 | VCC min = 2.5 V; same 128 × 8-bit organization, SOIC-8, and instruction set | Not suitable for 1.8 V systems; otherwise pin- and function-compatible | Select if system VCC is guaranteed ≥2.5 V and higher ESD tolerance (≥4 kV) is required |
| AT25010B-MAHL-T | SPI interface (4-wire), 1 Kbit (128 × 8), 1.8–5.5 V, 20 MHz max clock | Requires additional CS and SCK lines; no Ready/Busy pin - relies on WIP flag polling | Choose for designs already using SPI peripherals; trade-off is higher pin count vs. faster clock rate |
Compared with 93LC46A-I/SN, the 93AA46BX-I/SN supports lower VCC operation down to 1.8 V, enabling direct integration into ultra-low-power microcontrollers. Against AT25010B-MAHL-T, it uses simpler 3-wire Microwire signaling but lacks SPI speed - making it preferable where GPIO count is constrained and sub-3 MHz throughput suffices.
Availability
93AA46BX-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and consumer remote control memory requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 93AA46BX-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 93AA46BX-I/SN belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for cost-sensitive, low-pin-count embedded systems requiring reliable nonvolatile storage with minimal external components and broad voltage compatibility.
FAQ
What is the memory organization of the 93AA46BX-I/SN?
The 93AA46BX-I/SN has a fixed 128 × 8-bit (1 Kbit) organization. As an 'A'-suffix device, it does not use the ORG pin and operates exclusively in x8 mode - unlike 'C'-suffix variants which support configurable x8/x16 via the ORG pin. This simplifies interface design for 8-bit microcontrollers and eliminates external configuration logic.
Does the 93AA46BX-I/SN require external pull-up resistors on its I/O pins?
The 93AA46BX-I/SN does not require external pull-ups on CS, CLK, or DI for basic operation, as internal weak pull-downs are sufficient for most MCU-driven interfaces. However, if DI and DO are wired together (bus-sharing configuration), a 10 kΩ series resistor is recommended between them to prevent bus conflict during the dummy-zero phase of READ operations - per Microchip Application Note AN855.
How is write protection implemented on the 93AA46BX-I/SN?
Write protection on the 93AA46BX-I/SN is implemented through dual hardware and command-based mechanisms: (1) Power-on reset disables writes until VCC exceeds 1.5 V, and (2) the device powers up in Erase/Write Disable (EWDS) state, requiring an explicit EWEN command before any ERASE or WRITE instruction. An EWDS command should follow each write to re-enable protection.
What is the maximum clock frequency supported by the 93AA46BX-I/SN at 3.3 V VCC?
At VCC = 3.3 V, the 93AA46BX-I/SN supports a maximum clock frequency of 2 MHz. This is specified in Table 1-2 (AC Characteristics) under condition "2.5 V ≤ VCC < 5.5 V". Exceeding this frequency risks setup/hold timing violations and unreliable command execution, especially during WRITE or ERASE cycles where DO status polling is used.
Can the 93AA46BX-I/SN be used in automotive applications?
The 93AA46BX-I/SN is rated for Industrial temperature range (–40°C to +85°C), not Automotive (–40°C to +125°C). While it may function in some under-hood or cabin environments, Microchip does not qualify or guarantee its performance beyond the I-temp specification. For automotive applications, consider the 93LC46B-E/SN or 93C46B-E/SN, which are explicitly qualified to AEC-Q100 Grade 2.
93AA46BX-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
93AA46BX-I/SN FAQ
1.How can I place an order for 93AA46BX-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA46BX-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 93AA46BX-I/SN reliable?
The price and inventory of 93AA46BX-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 93AA46BX-I/SN is usually 5 days.
3.What payment methods are accepted for 93AA46BX-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA46BX-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA46BX-I/SN?
93AA46BX-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA46BX-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 93AA46BX-I/SN?
For technical support, including 93AA46BX-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA46BX-I/SN requirements.
6.How does Aetrix verify that 93AA46BX-I/SN is sourced from the original manufacturer or authorized distributors?
All 93AA46BX-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 93AA46BX-I/SN meets industry standards.
7.What is the process for return or replacement of 93AA46BX-I/SN?
All 93AA46BX-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93AA46BX-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 93AA46BX-I/SN part is unused and in its original packaging.
Return procedure for 93AA46BX-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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