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Microchip Technology 93AA46A-I/SN
- Part No.:
- 93AA46A-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93AA46A-I/SN.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:255
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Product details
Overview
93AA46A-I/SN from Microchip Technology Inc. is a 1 Kbit (128 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, operating across 1.8–5.5 V, supporting Industrial temperature range (−40°C to +85°C), and offering 1,000,000 erase/write cycles with >200 years data retention. It serves as nonvolatile configuration storage in microcontroller-based embedded systems requiring robust, low-power memory.
For engineers reviewing the 93AA46A-I/SN datasheet, 93AA46A-I/SN pinout, 93AA46A-I/SN application, or 93AA46A-I/SN equivalent, this page delivers verified electrical specs, package mapping, functional timing behavior, real-world use cases, and validated alternative parts - all aligned to DS20001749K revision K.
Technical Context
The 93AA46A-I/SN implements a synchronous serial Microwire interface with CS, CLK, DI, and DO pins; it lacks an ORG pin and is fixed at 8-bit word organization. Its internal architecture includes auto-erase-before-write, ERAL/WRAL commands, and Ready/Busy status reporting via DO pin during self-timed programming cycles (6 ms typical).
Power-on/off data protection is enforced by internal voltage detection (VPOR = 1.5 V typ), and write operations require prior EWEN instruction execution. Standby current is ≤1 µA (I-temp), and read/write currents are specified at 100 µA (read, 2.5 V) and 2 mA (write, 2.5 V), confirming suitability for battery-backed and energy-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (128 × 8-bit) - provides compact nonvolatile storage for calibration data, device IDs, or small firmware patches. |
| VCC Range | 1.8 V to 5.5 V - supports direct interfacing with 1.8 V, 3.3 V, and 5 V logic domains without level shifting. |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - requires only four GPIOs and no external address lines. |
| Endurance | 1,000,000 erase/write cycles - ensures long-term reliability in field-updatable systems with frequent parameter writes. |
| Data Retention | >200 years at +25°C - guarantees integrity of stored settings over full product lifecycle without refresh. |
| Access Time | TPD ≤ 400 ns (1.8 V, CL = 100 pF) - enables fast read response in time-critical configuration reads. |
| Write Cycle Time | TWC = 6 ms (erase/write) - defines minimum delay between successive write commands; impacts firmware update latency. |
Pinout & Package
93AA46A-I/SN is packaged in 8-lead SOIC (SN), with lead finish Pb-free Matte Tin. Pin 1 is marked by laser dot; pin 1 ID orientation matches standard SOIC convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable: must be held ≥250 ns low between instructions; deselects device into standby (≤1 µA ICCS). |
| CLK | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcodes, addresses, and data; stoppable mid-sequence. |
| DI | Data Input | Receives Start bit, opcode, address, and write data; tied high with CS and CLK rising edge to initiate command. |
| DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z when CS low or after status polling. |
| VSS | Ground | Reference for all I/O and internal circuitry; must be low-impedance connection to minimize noise coupling. |
| NC | No Internal Connection | Pin 7 in SOIC package - unconnected internally; must be left floating or tied to VSS per layout best practice. |
| VCC | Power Supply | Supplies core logic and memory array; internal POR circuit triggers at ~1.5 V to prevent partial writes during power ramp. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control - internal logic manages 6 ms cycle; frees MCU resources during programming. |
| Automatic ERAL before WRAL | WRAL command includes built-in Erase All - simplifies full-memory reprogramming without separate ERAL instruction. |
| Ready/Busy status on DO | Enables polling-based flow control - avoids fixed delays; DO low indicates active programming, high = ready. |
| Power-on/off data protection | Hardware-enforced lockout below VPOR (1.5 V) prevents corruption during brown-out or power-up transients. |
| Erase/Write Enable/Disable (EWEN/EWDS) | Explicit software-controlled write gating - powers up in EWDS state, requiring EWEN before any write/erase. |
Applications
| Industrial Sensor Calibration | Consumer Remote Control ID Storage |
|---|---|
|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients in HVAC or pressure transducers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed at system boot; read once per power cycle. Use Value: Eliminates external trim pots and manual calibration; maintains accuracy across 200+ year data retention. |
Use Scenario: Holding unique IR code sets and button mapping profiles in universal remotes. IC Role / Device Role / Timing Role: User-configurable memory updated infrequently via MCU UI; read on keypress. Use Value: Enables field-customizable operation without firmware reflashing; 1M endurance supports lifetime updates. |
| Medical Device Settings Backup | Automotive Body Control Module NVM |
|
Use Scenario: Preserving user-selected alarm thresholds and display preferences in portable pulse oximeters. IC Role / Device Role / Timing Role: Low-power backup memory retaining settings during battery replacement or sleep mode. Use Value: 1.8 V operation and ≤1 µA standby current extend battery life; RoHS compliance meets medical safety standards. |
Use Scenario: Storing door lock actuator timing parameters and mirror position presets in BCMs. IC Role / Device Role / Timing Role: Configuration store accessed at ignition-on; written only during service-mode reprogramming. Use Value: −40°C to +85°C rating ensures reliability in under-hood environments; 5.5 V tolerance accommodates load-dump transients. |
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 VCC range 2.5–5.5 V; higher VIH/VIL thresholds; no 1.8 V support. | Not suitable for 1.8 V systems; otherwise identical instruction set and timing. | Select 93LC46A-I/SN only if system VCC ≥2.5 V and 1.8 V compatibility is unnecessary. |
| AT25010B-SSHL-T | SPI interface (4-wire), same 1 Kbit size, 1.8–5.5 V, but uses SPI protocol instead of Microwire; no DO status polling. | Requires SPI-capable MCU; lacks Ready/Busy pin - relies on fixed 5 ms tWR or software timeout. | Choose AT25010B-SSHL-T only when migrating to SPI infrastructure or when Microwire peripherals are unavailable. |
Compared with 93AA46A-I/SN, 93LC46A-I/SN sacrifices 1.8 V operation for tighter input thresholds, while AT25010B-SSHL-T replaces Microwire simplicity with SPI's broader ecosystem support but removes hardware status feedback - making 93AA46A-I/SN optimal for resource-constrained 1.8 V designs needing deterministic write completion signaling.
Availability
93AA46A-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer remote control ID storage, and medical device settings backup requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.
Supply support for 93AA46A-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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93XX series EEPROMs were designed specifically for cost-sensitive, low-power embedded systems requiring reliable serial nonvolatile storage - emphasizing micropower operation, wide VCC range, and simple 3-wire interface compatibility.
FAQ
What is the memory organization of the 93AA46A-I/SN?
The 93AA46A-I/SN has a fixed 128 × 8-bit (1 Kbit) organization. Unlike 'C' variants, it does not feature an ORG pin - its word size is permanently configured for 8-bit communication. This eliminates external configuration logic and simplifies PCB layout for systems requiring byte-oriented access.
Does the 93AA46A-I/SN support 1.8 V operation?
Yes, the 93AA46A-I/SN operates across 1.8 V to 5.5 V, confirmed in the Device Selection Table and DC Characteristics (D8–D10). At 1.8 V, write current is ≤2 µA and standby current ≤1 µA, enabling direct integration into ultra-low-power 1.8 V microcontroller subsystems without level translation.
How is write protection implemented on the 93AA46A-I/SN?
Write protection is enforced through dual mechanisms: hardware voltage detection (VPOR ≈1.5 V) blocks all operations below threshold, and software-controlled EWEN/EWDS commands gate erase/write access. The device powers up in EWDS mode, requiring explicit EWEN before any programming - preventing accidental writes during power transitions or noise events.
What is the purpose of the NC pin on the 93AA46A-I/SN SOIC package?
Pin 7 on the 93AA46A-I/SN SOIC (SN) package is designated NC (No Connection) - it has no internal bond wire or circuit connection. Per Microchip's Package Type diagrams and Pin Function Table, this pin must be left floating or tied to VSS for mechanical stability; connecting it to VCC or signal lines may cause undefined behavior.
Can the 93AA46A-I/SN be used in automotive applications?
The 93AA46A-I/SN is rated for Industrial temperature (−40°C to +85°C), not Automotive (−40°C to +125°C). While it may function in some under-dash environments, Microchip specifies only the 'E'-suffix variants (e.g., 93AA46A-E/SN) for automotive qualification. For AEC-Q100 compliance and extended temperature margin, the E-grade part must be selected instead of 93AA46A-I/SN.
93AA46A-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:
- 128 x 8
- 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
93AA46A-I/SN FAQ
1.How can I place an order for 93AA46A-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA46A-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 93AA46A-I/SN reliable?
The price and inventory of 93AA46A-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 93AA46A-I/SN is usually 5 days.
3.What payment methods are accepted for 93AA46A-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA46A-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA46A-I/SN?
93AA46A-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA46A-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 93AA46A-I/SN?
For technical support, including 93AA46A-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA46A-I/SN requirements.
6.How does Aetrix verify that 93AA46A-I/SN is sourced from the original manufacturer or authorized distributors?
All 93AA46A-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 93AA46A-I/SN meets industry standards.
7.What is the process for return or replacement of 93AA46A-I/SN?
All 93AA46A-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93AA46A-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 93AA46A-I/SN part is unused and in its original packaging.
Return procedure for 93AA46A-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93AA46A-I/SN Tags
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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