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Microchip Technology 93AA46AX-I/SN
- Part No.:
- 93AA46AX-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93AA46AX-I/SN.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,613
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Product details
Overview
93AA46AX-I/SN from Microchip Technology Inc. is a 1Kbit (128 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 1.8–5.5V supply range, and industrial temperature rating (−40°C to +85°C). It features self-timed erase/write cycles, automatic erase-all-before-write-all (ERAL/WRAL), and Ready/Busy status signaling via DO pin. Used for nonvolatile parameter storage in microcontroller-based embedded systems requiring reliable, low-power memory.
For engineers reviewing the 93AA46AX-I/SN datasheet, 93AA46AX-I/SN pinout, 93AA46AX-I/SN application, or 93AA46AX-I/SN equivalent, key selection criteria include VCC operating range (1.8–5.5V), 8-bit fixed organization (no ORG pin), 1M endurance cycles, >200-year data retention, and SOIC-8 (SN) package compatibility with legacy PCB footprints.
Technical Context
The 93AA46AX-I/SN implements a synchronous serial Microwire interface with CS, CLK, DI, and DO signals - no ORG pin present, confirming fixed 8-bit word organization. Communication uses rising-edge clocked opcodes (e.g., READ = 10b, WRITE = 01b) and 7-bit addressing (A6–A0), with 18-clock-cycle read/write sequences.
Internal power-on protection disables write operations below ~1.5V; EWEN/EWDS commands enforce explicit write-enable control. Erase/write timing is self-timed (6 ms typical), with DO pin providing active-low Ready/Busy status after CS high assertion following TCSL ≥250 ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (128 words × 8 bits) - supports compact configuration storage without external address latching. |
| VCC Range | 1.8 V to 5.5 V - interoperable with 1.8V, 3.3V, and 5V logic domains; eliminates level-shifting in mixed-supply systems. |
| Endurance | 1,000,000 erase/write cycles - enables frequent calibration or logging updates over product lifetime. |
| Data Retention | >200 years at +25°C - ensures long-term reliability for firmware parameters and device identity storage. |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - minimal GPIO usage; no I²C pull-ups or SPI SS complexity. |
| Access Time | TPD ≤ 400 ns (1.8V, CL=100pF) - supports fast read access in real-time control loops. |
| Write Cycle Time | TWC = 6 ms (typical) - deterministic programming latency; enables predictable timeout handling in host firmware. |
Pinout & Package
Package: 8-lead SOIC (SN), Pb-free Matte Tin finish, 3.9 mm × 4.9 mm body, 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; controls Standby entry and Ready/Busy polling window. |
| 2: CLK | Serial Clock | Rising-edge synchronized I/O; clock-stopping allowed mid-transfer; no requirement during self-timed write. |
| 3: DI | Data Input | Accepts Start bit, opcodes, addresses, and write data; tied high at power-up to detect Start condition. |
| 4: DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z when CS low or during non-read states. |
| 5: VSS | Ground | Reference for all digital and analog circuitry; requires low-impedance connection to minimize noise coupling. |
| 6: NC | No Connect | Internally unconnected; must remain floating or grounded per layout best practices (no routing). |
| 7: NC | No Connect | Internally unconnected; identical treatment as Pin 6; avoids unintended parasitic coupling. |
| 8: VCC | Power Supply | Supplies core logic and memory array; bypass capacitor (0.1 µF) required within 10 mm of this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates external timing control; host only monitors DO pin for completion - simplifies firmware state machines. |
| Automatic ERAL before WRAL | Guarantees full-array readiness prior to bulk write; prevents partial writes or data corruption on power loss. |
| Power-on/off data protection | Hardware lockout below ~1.5V VCC; prevents inadvertent writes during brown-out or power ramp - no software safeguards needed. |
| Ready/Busy status on DO | Enables polling-based operation without interrupt lines; reduces MCU pin count and eliminates need for dedicated status GPIO. |
| Industry-standard Microwire interface | Direct drop-in replacement for legacy 93XX series; compatible with existing drivers and protocol stacks across multiple MCU families. |
Applications
| Industrial Sensor Calibration | Consumer Appliance Settings |
|---|---|
Use Scenario: Storing factory-trimmed sensor offset/gain coefficients and user-adjusted thresholds in HVAC temperature sensors. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during boot and recalibration routines; reads occur at system startup, writes only during service mode. Use Value: Maintains accuracy across power cycles and field updates; 1M endurance supports lifetime recalibration without wear-out concerns. | Use Scenario: Retaining user preferences (e.g., cooking time, temperature, language) in microwave ovens and washing machines. IC Role / Device Role / Timing Role: Parameter storage peripheral interfaced to 8-bit MCU via 3-wire bus; accessed asynchronously during UI navigation and save events. Use Value: Low 1.8V operation extends battery backup life; SOIC-8 footprint allows direct replacement of legacy EEPROMs in cost-sensitive BOMs. |
| Medical Device Configuration | Automotive Body Control Module |
Use Scenario: Saving device-specific calibration data and regulatory compliance logs in portable blood glucose meters. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory for FDA-required traceability records; write-protected via EWDS after initial setup. Use Value: >200-year data retention meets medical device shelf-life requirements; RoHS-compliant packaging satisfies global regulatory mandates. | Use Scenario: Storing door lock actuator profiles, mirror position presets, and lighting dimming curves in vehicle BCMs. IC Role / Device Role / Timing Role: Dedicated configuration memory for CAN-connected subsystems; accessed during ignition-on initialization sequence. Use Value: Industrial temp range (−40°C to +85°C) ensures operation in under-hood environments; 5.5V max VCC tolerates 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 | VCC range 2.5–5.5V; identical 128×8 organization and SOIC-8 package; same instruction set and timing. | Not suitable for 1.8V systems; requires minimum 2.5V supply - excludes ultra-low-power or battery-backed designs. | Select if system VCC is stable ≥2.5V and higher immunity to supply noise is desired. |
| AT25010B-SSHL-T | SPI interface (4-wire), 1.8–5.5V, 128×8 organization; lacks ERAL/WRAL and EWEN/EWDS commands. | Requires additional chip select line and different driver stack; no auto-erase-all - host must manage sector erases explicitly. | Choose when migrating to SPI-based platforms or when leveraging Atmel's enhanced write-protection features. |
Compared with 93LC46A-I/SN, the 93AA46AX-I/SN supports lower-voltage operation critical for energy harvesting and coin-cell applications; versus AT25010B-SSHL-T, it offers simpler 3-wire control and built-in bulk-erase functionality but lacks SPI compatibility.
Availability
93AA46AX-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer appliance settings, medical device configuration, and automotive body control modules requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for 93AA46AX-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.
The 93AA46AX-I/SN belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for cost-sensitive, low-power embedded systems needing simple, robust nonvolatile storage with minimal pin count and firmware overhead.
FAQ
What is the memory organization of the 93AA46AX-I/SN?
The 93AA46AX-I/SN has a fixed 128 × 8-bit (1Kbit) organization. Unlike 'C' variants, it lacks an ORG pin and is not configurable for 16-bit operation - all instructions and data transfers use 8-bit words and 7-bit addressing (A6–A0).
Does the 93AA46AX-I/SN require an external pull-up resistor on the DO pin?
No, the 93AA46AX-I/SN does not require an external pull-up on DO. The pin actively drives high/low during Read and Ready/Busy status reporting, and enters High-Z when inactive. A pull-up may cause contention during High-Z periods and is not recommended per Microchip's design guidelines.
How is write protection implemented on the 93AA46AX-I/SN?
Write protection on the 93AA46AX-I/SN is enforced by the EWEN/EWDS command sequence: the device powers up in EWDS (Erase/Write Disable) mode, and an EWEN instruction must precede any ERASE or WRITE operation. After programming, issuing EWDS relocks the memory - preventing accidental writes during normal operation or power transients.
Can the 93AA46AX-I/SN operate at 1.8V while maintaining full AC specifications?
Yes, the 93AA46AX-I/SN is fully specified down to 1.8V: maximum clock frequency is 1 MHz, TCKH/TCKL are 450 ns, and TPD is 400 ns (CL = 100 pF). All DC and AC parameters in Table 1-1 and Table 1-2 apply across the full 1.8–5.5V range for Industrial temperature grade.
What package type does the 'SN' suffix indicate for the 93AA46AX-I/SN?
The 'SN' suffix denotes an 8-lead SOIC (Small Outline Integrated Circuit) package with standard 1.27 mm lead pitch, 3.9 mm × 4.9 mm body size, and Pb-free Matte Tin (Sn) finish - compatible with automated SMT assembly and legacy 93XX footprint layouts.
93AA46AX-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:
- Not 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
93AA46AX-I/SN FAQ
1.How can I place an order for 93AA46AX-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA46AX-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 93AA46AX-I/SN reliable?
The price and inventory of 93AA46AX-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 93AA46AX-I/SN is usually 5 days.
3.What payment methods are accepted for 93AA46AX-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA46AX-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA46AX-I/SN?
93AA46AX-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA46AX-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 93AA46AX-I/SN?
For technical support, including 93AA46AX-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA46AX-I/SN requirements.
6.How does Aetrix verify that 93AA46AX-I/SN is sourced from the original manufacturer or authorized distributors?
All 93AA46AX-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 93AA46AX-I/SN meets industry standards.
7.What is the process for return or replacement of 93AA46AX-I/SN?
All 93AA46AX-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93AA46AX-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 93AA46AX-I/SN part is unused and in its original packaging.
Return procedure for 93AA46AX-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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