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Microchip Technology 93AA46X/SN
- Part No.:
- 93AA46X/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93AA46X/SN.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,688
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Product details
Overview
93AA46X/SN from Microchip Technology Inc. is a 1 Kbit (128 × 8 or 64 × 16) low-voltage serial EEPROM with Microwire interface, ORG-pin-selectable memory organization, and 1.8 V minimum operating voltage. It features self-timed erase/write cycles, 1,000,000 endurance cycles, >200-year data retention, and operates across commercial temperature range (0°C to +70°C). It is used in embedded system configuration storage where space-constrained SOIC packaging and single-supply low-power operation are required.
For engineers reviewing the 93AA46X/SN datasheet, 93AA46X/SN pinout, 93AA46X/SN application, or 93AA46X/SN equivalent, key selection criteria include its 1.8 V–5.5 V supply range, 8-pin SN package with rotated pinout, ORG-configurable x8/x16 organization, RDY/BSY status via DO pin, and compatibility with legacy Microwire controllers in industrial control and consumer electronics firmware storage.
Technical Context
The 93AA46X/SN implements a synchronous 3-wire Microwire interface (CS, CLK, DI/DO) with start-bit detection and opcode-driven command set. Its internal architecture includes an address counter, output buffer, data register, mode decode logic, and clock generator - enabling sequential read, ERAL/WRAL bulk operations, and automatic ERAL before WRAL.
Memory configuration is determined by the ORG pin: tied to VCC for 64 × 16-bit organization (128 words), or to VSS for 128 × 8-bit organization (128 bytes). The device enters EWDS mode at power-up and requires explicit EWEN instruction before any erase or write operation - ensuring robust power-on/off data protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Kbit (128 × 8 or 64 × 16 bits), selectable via ORG pin - defines address space and data width per access |
| Supply voltage | 1.8 V to 5.5 V - enables direct interface with 1.8 V, 3.3 V, and 5 V microcontrollers without level shifting |
| Interface | 3-wire Microwire (CS, CLK, DI/DO) - compatible with legacy serial EEPROM controllers and minimal GPIO footprint |
| Endurance | 1,000,000 erase/write cycles - supports frequent firmware parameter updates in field-deployed devices |
| Data retention | >200 years at 25°C - ensures long-term reliability in unpowered storage applications |
| Operating temperature | 0°C to +70°C (Commercial grade) - suitable for indoor consumer and office equipment environments |
| Package | 8-lead SOIC (SN, 150 mil body) with rotated pinout - distinct from standard SOIC; requires layout verification |
Pinout & Package
8-lead plastic small-outline integrated circuit (SOIC), narrow body (150 mil), JEDEC MS-012 compliant, marked "/SN". Rotated pinout differs from standard 93AA46 - pin 1 is CS (not VCC), requiring PCB layout verification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; initiates self-timed programming on falling edge |
| 2: CLK | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data; stoppable mid-sequence |
| 3: DI | Data Input | Accepts start bit, opcode, address, and write data; may share net with DO only with caution due to bus conflict risk |
| 4: DO | Data Output / Status | Outputs read data or RDY/BSY status (low = busy); high-Z when inactive; requires pull-up for reliable Ready detection |
| 5: VSS | Ground | Reference return path for all signals and internal circuitry; must be low-impedance |
| 6: ORG | Memory Organization | Selects x8 (VSS) or x16 (VCC) mode; floating allowed only ≤1 MHz in x16 mode |
| 7: NU | Not Utilized | No internal connection; must be left unconnected or tied to VSS/VCC per board design rules |
| 8: VCC | Power Supply | 1.8–5.5 V supply; internal power-on reset inhibits programming until VCC > 1.4 V |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply 1.8 V operation | Enables direct integration into ultra-low-power systems without charge pumps or external regulators |
| Self-timed erase/write cycles | Eliminates need for external timing control - simplifies host firmware and reduces CPU overhead |
| Automatic ERAL before WRAL | Guarantees clean memory state prior to bulk write, preventing partial writes and data corruption |
| Power-on/off data protection | Hardware-enforced inhibition of programming below 1.4 V prevents inadvertent writes during brown-out conditions |
| Sequential read function | Allows continuous byte/word streaming with single READ command and sustained CS high - improves read throughput |
Applications
| Industrial Sensor Calibration Storage | Consumer Appliance Configuration |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and user-adjusted thresholds in temperature/humidity sensors. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed at boot and during field recalibration; uses x16 mode for compact coefficient storage. Use Value: 1.8 V operation allows direct interface with low-power sensor MCUs; 200-year retention ensures calibration integrity over product lifetime. | Use Scenario: Retaining user preferences (e.g., cycle settings, language, display brightness) across power cycles in washing machines and microwaves. IC Role / Device Role / Timing Role: System parameter store accessed via Microwire-compatible MCU GPIO; x8 mode used for byte-aligned settings. Use Value: 1 M endurance supports daily setting changes over 10+ years; SOIC-SN package fits tight control board layouts. |
| Medical Device Setup Parameters | Point-of-Sale Terminal Firmware Patch Storage |
Use Scenario: Holding regulatory-compliant default settings and clinician-configured operational limits in portable diagnostic tools. IC Role / Device Role / Timing Role: Secure boot-time configuration source; EWEN/EWDS commands prevent runtime corruption during clinical use. Use Value: Hardware power-loss protection ensures settings survive unexpected shutdowns; RDY/BSY polling enables deterministic update timing. | Use Scenario: Storing minor firmware patches or localization strings updated remotely in retail terminals without full flash reprogramming. IC Role / Device Role / Timing Role: Field-upgradable auxiliary code/data store; WRAL command enables atomic patch installation. Use Value: Self-timed 16 ms WRAL cycle minimizes host MCU blocking time; 5.5 V max rating accommodates legacy 5 V terminal power rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93AA46C/SN | Pin-compatible successor with identical SN package and rotated pinout; supports same 1.8–5.5 V range but adds enhanced ESD (6 kV HBM) and tighter AC timing specs. | Recommended for new designs; offers improved robustness in noisy industrial environments. | Select 93AA46C/SN when designing new products - it supersedes 93AA46X/SN and maintains full functional and layout compatibility. |
| 25LC010A-I/SN | SPI interface (4-wire), 1 Kbit capacity, same 8-lead SN package; lacks ORG pin - fixed 128 × 8 organization; requires different protocol stack. | Suitable where SPI is already used in system; not drop-in replaceable due to interface and command set differences. | Choose 25LC010A-I/SN only if migrating to SPI infrastructure; verify host driver compatibility and timing margins. |
Compared with 93AA46X/SN, the 93AA46C/SN provides enhanced reliability without layout or firmware changes, while the 25LC010A-I/SN trades Microwire simplicity for broader SPI ecosystem support - requiring interface redesign but offering higher clock rates and vendor flexibility.
Availability
93AA46X/SN is available at Aetrix Electronics and suitable for industrial sensor calibration storage, consumer appliance configuration, medical device setup parameters, and point-of-sale terminal firmware patch storage requiring stable component supply and legacy Microwire compatibility.
Supply support for 93AA46X/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 93AA46X/SN belongs to Microchip's legacy Microwire Serial EEPROM product line, designed specifically for cost-sensitive, space-constrained embedded systems requiring simple 3-wire nonvolatile storage with ultra-low-voltage operation.
FAQ
What is the key functional difference between 93AA46X/SN and standard 93AA46/SN?
The 93AA46X/SN uses a rotated pinout in the 8-lead SOIC (SN) package - pin 1 is CS instead of VCC. This distinguishes it from the standard 93AA46/SN and requires verified PCB layout alignment. All electrical and functional specifications remain identical to the base 93AA46 family, including ORG-selectable x8/x16 organization and 1.8 V operation. The 93AA46X/SN is explicitly designated for SN-package-only delivery per Microchip's product identification system.
Does 93AA46X/SN support both 8-bit and 16-bit memory access modes?
Yes, the 93AA46X/SN supports both 128 × 8-bit and 64 × 16-bit organizations, selected by the ORG pin: tied to VSS for x8 mode (128 bytes), or to VCC for x16 mode (64 words). Instruction sets differ per mode - READ requires 18 clock cycles in x8 mode versus 25 in x16 mode. The 93AA46X/SN datasheet provides separate opcode tables (Tables 1-2 and 1-3) confirming full dual-mode support with distinct address and data widths.
How does the RDY/BSY status signaling work on 93AA46X/SN?
The 93AA46X/SN uses the DO pin for Ready/Busy status during erase/write cycles: DO = low indicates active programming; DO = high means completion. To sample status, CS must be brought high for ≥250 ns after TCSL, then read on the next CLK rising edge. The 93AA46X/SN requires an external pull-up on DO to ensure valid high-level detection. This polling mechanism eliminates need for fixed delay loops and enables deterministic host synchronization.
Is 93AA46X/SN suitable for new designs, or is it obsolete?
The 93AA46X/SN is marked "Not recommended for new designs" in its official datasheet (DS20067K, page 1), with Microchip recommending migration to the pin-compatible 93AA46C/SN. However, the 93AA46X/SN remains actively available and supported for legacy design refresh, repair, and continuity programs. Its SN-package rotated pinout and full functional equivalence to the 93AA46 family ensure drop-in replacement capability where existing layouts match the X-series pin assignment.
What are the absolute maximum ratings for 93AA46X/SN supply and I/O voltages?
The 93AA46X/SN has an absolute maximum VCC rating of 7.0 V and absolute maximum input/output voltage range of –0.6 V to VCC + 1.0 V referenced to VSS. Exceeding these stresses may cause permanent damage. Functional operation is guaranteed only within the specified operating range of 1.8 V to 5.5 V for VCC, and input logic levels must comply with VIH/VIL thresholds defined per VCC (e.g., VIH2 = 0.7×VCC when VCC < 2.7 V). These ratings are documented in DS20067K-page 2.
93AA46X/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not 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:
- 2 MHz
- Write Cycle Time - Word, Page:
- 10ms
- Access Time:
- -
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93AA46X/SN FAQ
1.How can I place an order for 93AA46X/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA46X/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 93AA46X/SN reliable?
The price and inventory of 93AA46X/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93AA46X/SN is usually 5 days.
3.What payment methods are accepted for 93AA46X/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA46X/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA46X/SN?
93AA46X/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA46X/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 93AA46X/SN?
For technical support, including 93AA46X/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA46X/SN requirements.
6.How does Aetrix verify that 93AA46X/SN is sourced from the original manufacturer or authorized distributors?
All 93AA46X/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 93AA46X/SN meets industry standards.
7.What is the process for return or replacement of 93AA46X/SN?
All 93AA46X/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93AA46X/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 93AA46X/SN part is unused and in its original packaging.
Return procedure for 93AA46X/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93AA46X/SN Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
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