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Microchip Technology 93AA46C-I/P
- Part No.:
- 93AA46C-I/P
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
93AA46C-I/P.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,930
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Product details
Overview
93AA46C-I/P from Microchip Technology is a 1 Kbit (128 × 8 or 64 × 16) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, ORG pin for runtime word-size selection, 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 1,000,000 endurance cycles. Used in embedded system configuration storage where flexible memory width and robust nonvolatile retention are required.
For engineers reviewing the 93AA46C-I/P datasheet, 93AA46C-I/P pinout, 93AA46C-I/P application, or 93AA46C-I/P equivalent, this page delivers verified electrical specs, package mapping to 8-lead PDIP, functional timing behavior, real-world use scenarios, and two validated alternative parts with precise technical and application-level differences.
Technical Context
The 93AA46C-I/P implements a synchronous Microwire-compatible serial interface with CS, CLK, DI, DO, and ORG pins. Its dual-organization architecture allows dynamic selection between 8-bit and 16-bit word access via the ORG pin voltage level-VSS selects 128 × 8, VCC selects 64 × 16-enabling hardware-compatible reuse across different host bus widths.
It uses self-timed internal erase-before-write logic with automatic ERAL prior to WRAL, and supports Ready/Busy polling via DO during programming. Power-on reset circuitry disables write operations below 1.5 V, and EWEN/EWDS commands provide software-controlled write protection independent of VCC monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (128 × 8-bit or 64 × 16-bit, selectable via ORG pin) |
| VCC Range | 1.8 V to 5.5 V - supports single-supply operation across battery-powered and 3.3/5 V systems |
| Clock Frequency | Up to 3 MHz at VCC ≥ 4.5 V - enables fast configuration reads without requiring high-speed MCU peripherals |
| Write Cycle Time | 6 ms typical (TWC) - defines minimum interval between successive WRITE/ERAL commands |
| Data Retention | > 200 years at +25°C - ensures long-term reliability for firmware parameter storage in unattended equipment |
| Endurance | 1,000,000 erase/write cycles - sufficient for frequent calibration or logging applications |
| Temperature Range | Industrial: –40°C to +85°C - qualified for deployment in industrial controllers and automotive body electronics |
Pinout & Package
8-lead PDIP (P) package with 0.3-inch body width; lead finish is Pb-free matte tin. Pin 1 marked by notch or laser dot; pin 1 ID confirmed per Microchip DS20001749K-page 18.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; initiates self-timed programming on falling edge (93AA/93LC) |
| CLK | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data; stoppable mid-sequence without state loss |
| DI | Data Input | Receives Start bit, opcodes, addresses, and write data; compatible with shared DI/DO bus when series resistor applied |
| DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z on CS falling edge |
| VSS | Ground | Reference for all digital and analog functions; must be low-impedance connection to avoid timing violations |
| ORG | Organization Control | Logic high → 64 × 16-bit mode; logic low → 128 × 8-bit mode; must be externally biased, not floating |
| NC | No Internal Connection | Pin 7 in PDIP/SOIC - no internal bond; may be left unconnected or grounded per PCB layout convenience |
| VCC | Power Supply | Supplies core logic and memory array; internal POR triggers at ~1.5 V; decoupling capacitor mandatory near pin |
Key Features
| Feature | Design Value |
|---|---|
| ORG-pin configurable organization | Enables one BOM item to serve both 8-bit and 16-bit microcontroller interfaces without redesign |
| Auto-erase before write | Eliminates need for separate ERASE command before WRITE - reduces firmware complexity and command overhead |
| ERAL before WRAL | Guarantees full-array erase completes before bulk write begins - prevents partial writes and data corruption |
| Ready/Busy polling via DO | Allows host MCU to avoid fixed delays; improves system responsiveness and eliminates unnecessary wait loops |
| Power-on/off data protection | Hardware-enforced write inhibition below 1.5 V - prevents inadvertent writes during brown-out or hot-plug events |
Applications
| Industrial Sensor Calibration Storage | Consumer Appliance Configuration Memory |
|---|---|
Use Scenario: Storing factory-trimmed sensor gain/offset coefficients and user-adjusted thresholds in HVAC temperature sensors. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed at power-up and during field recalibration; operates at ≤1 MHz clock to match low-power MCU SPI peripheral. Use Value: Dual-word-size support allows same 93AA46C-I/P to store either 128 8-bit calibration values (for simple sensors) or 64 16-bit values (for high-precision RTDs), reducing inventory SKUs. |
Use Scenario: Retaining user preferences (e.g., cycle selection, delay timers, language) across power cycles in smart washing machines. IC Role / Device Role / Timing Role: Serial configuration EEPROM interfaced to 8-bit MCU via 3-wire Microwire; accessed during boot and settings update. Use Value: 1M endurance and >200-year data retention ensure reliable operation over 15+ year appliance lifetime without data loss. |
| Automotive Body Control Module (BCM) Settings | Medical Device Usage Log Storage |
Use Scenario: Saving seat/mirror position presets, lighting profiles, and door lock configurations in 12 V automotive BCMs. IC Role / Device Role / Timing Role: Low-voltage EEPROM operating from regulated 3.3 V rail; withstands cold-crank transients due to built-in VCC monitor. Use Value: Industrial temperature rating (–40°C to +85°C) and 1.8 V min VCC allow direct integration into 3.3 V domains without level-shifting. |
Use Scenario: Recording timestamped usage events (e.g., sterilization cycles, alarm triggers) in portable infusion pumps. IC Role / Device Role / Timing Role: Nonvolatile event logger accessed intermittently; uses sequential read to dump logs via UART-connected host. Use Value: Self-timed 6 ms write cycles and automatic ERAL/WRAL reduce firmware overhead, enabling deterministic log commit timing critical for regulatory traceability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC46C-I/P | VCC range 2.5–5.5 V; identical pinout, ORG function, and instruction set; higher minimum VCC excludes 1.8 V operation | Not suitable for 1.8 V battery-powered devices; otherwise drop-in replacement in 3.3 V/5 V systems with same timing and endurance | Select 93LC46C-I/P only if system VCC never falls below 2.5 V and RoHS compliance is required (both parts are RoHS-compliant) |
| AT25010B-PU | SPI interface (4-wire), 1 Kbit, 1.8–5.5 V; no ORG pin; uses WREN/WRDI for write enable; 5 ms write time | Requires SPI master instead of Microwire; lacks runtime word-size flexibility; needs explicit WREN before each write | Choose AT25010B-PU only when migrating to SPI-based platforms or when leveraging existing SPI driver libraries - not a pin- or protocol-compatible substitute |
Compared with 93LC46C-I/P, the 93AA46C-I/P supports lower-voltage operation down to 1.8 V, making it preferable for energy-harvesting or coin-cell designs; compared with AT25010B-PU, it offers hardware-configurable word size and simpler write sequencing but requires Microwire-compatible controller logic.
Availability
93AA46C-I/P is available at Aetrix Electronics and suitable for industrial sensor calibration storage, consumer appliance configuration memory, automotive body control module settings, and medical device usage log storage requiring stable component supply and long-lifecycle support.
Supply support for 93AA46C-I/P 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 93XX46 family was designed specifically for cost-sensitive, low-power embedded systems requiring reliable nonvolatile storage with minimal external components and flexible interface options.
FAQ
What is the function of the ORG pin on the 93AA46C-I/P?
The ORG pin on the 93AA46C-I/P selects memory organization: tied to VCC, it configures the device as 64 × 16-bit; tied to VSS, it configures as 128 × 8-bit. This hardware-selectable mode eliminates firmware branching for word-width adaptation. The 93AA46C-I/P requires a valid logic level on ORG at power-up; floating is not permitted. This feature is unique to 'C' variants - 'A' and 'B' versions lack ORG and are fixed-width.
Does the 93AA46C-I/P require an external pull-up resistor on the DO pin?
No, the 93AA46C-I/P does not require an external pull-up on DO. The DO pin actively drives high or low during READ or Ready/Busy polling, and enters High-Z when CS is low or during non-read states. However, if DI and DO are shorted (shared bus), a series resistor (e.g., 10 kΩ) is recommended to prevent bus contention during the dummy zero phase of READ, as specified in DS20001749K-page 6.
What is the minimum VCC voltage that permits reliable write operations on the 93AA46C-I/P?
The 93AA46C-I/P guarantees functional write operations down to 1.8 V, but its internal power-on reset (POR) circuit holds the device in write-inhibit mode until VCC rises above ~1.5 V. Therefore, write sequences must begin only after VCC stabilizes ≥1.8 V. Below 1.8 V, reads remain valid, but ERASE, WRITE, ERAL, and WRAL commands are ignored - ensuring data integrity during brown-out conditions.
How does the 93AA46C-I/P indicate readiness after a WRITE command?
After issuing a WRITE command, the 93AA46C-I/P initiates a self-timed 6 ms internal cycle. During this time, the DO pin reflects Ready/Busy status: logic low indicates ongoing programming; logic high indicates completion. To poll, the host must bring CS high for ≥250 ns after TCSL, then sample DO. A high DO confirms the addressed location is written and the device accepts new commands.
Is the 93AA46C-I/P pin-compatible with the 93AA46A-I/P or 93AA46B-I/P?
No, the 93AA46C-I/P is not pin-compatible with the 93AA46A-I/P or 93AA46B-I/P. Although all share the same 8-lead PDIP footprint, the 93AA46A/B variants have NC (no connect) on pin 6 (ORG location), while the 93AA46C-I/P uses pin 6 as the active ORG input. Connecting ORG to VCC or VSS on a board designed for 93AA46A/B would create a short or undefined state - requiring PCB revision for substitution.
93AA46C-I/P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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, 64 x 16
- Memory Interface:
- Microwire
- Clock Frequency:
- 3 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
93AA46C-I/P FAQ
1.How can I place an order for 93AA46C-I/P through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA46C-I/P 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 93AA46C-I/P reliable?
The price and inventory of 93AA46C-I/P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93AA46C-I/P is usually 5 days.
3.What payment methods are accepted for 93AA46C-I/P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA46C-I/P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA46C-I/P?
93AA46C-I/P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA46C-I/P 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 93AA46C-I/P?
For technical support, including 93AA46C-I/P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA46C-I/P requirements.
6.How does Aetrix verify that 93AA46C-I/P is sourced from the original manufacturer or authorized distributors?
All 93AA46C-I/P 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 93AA46C-I/P meets industry standards.
7.What is the process for return or replacement of 93AA46C-I/P?
All 93AA46C-I/P units undergo pre-shipment inspection (PSI). If there is an issue with 93AA46C-I/P, 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 93AA46C-I/P part is unused and in its original packaging.
Return procedure for 93AA46C-I/P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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