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Microchip Technology 93AA46BT-I/OT
- Part No.:
- 93AA46BT-I/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SOT-23-6
- Datasheet:
-
93AA46BT-I/OT.pdf
- Description:
- IC EEPROM 1KBIT MIC WIRE SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,815
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Product details
Overview
93AA46BT-I/OT from Microchip Technology Inc. is a 1Kbit low-voltage serial EEPROM with 64 × 16-bit organization, 1.8–5.5V supply range, and SOT-23-6 package. It implements Microwire-compatible 3-wire serial interface (CS/CLK/DI/DO), supports self-timed erase/write cycles, and delivers 1,000,000 endurance cycles with >200-year data retention. It is used in embedded system configuration storage where space-constrained, nonvolatile memory with industrial temperature operation is required.
For engineers reviewing the 93AA46BT-I/OT datasheet, 93AA46BT-I/OT pinout, 93AA46BT-I/OT application, or 93AA46BT-I/OT equivalent, key selection considerations include its fixed 16-bit word size (no ORG pin), SOT-23-6 footprint compatibility, 2.5 MHz max clock at 2.5V, Ready/Busy status signaling via DO, and power-on data protection circuitry.
Technical Context
The 93AA46BT-I/OT operates as a dedicated 16-bit serial EEPROM without ORG pin functionality-its memory organization is permanently fixed to 64 × 16-bit. Communication follows Microwire protocol: instructions (READ, WRITE, ERASE, etc.) are clocked in on CLK rising edge with CS high, and DO provides both data output and Ready/Busy status during programming.
It features automatic erase-before-write, ERAL (Erase All) and WRAL (Write All) commands, EWEN/EWDS write-protection logic, and VCC brown-out detection at 1.5V. All timing-including TWC = 6 ms program cycle, TEC = 6 ms ERAL, and TWL = 15 ms WRAL-is self-timed and independent of external clock after CS fall (for 93AA versions).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (64 × 16-bit organization; no ORG pin - fixed x16 mode) |
| VCC Range | 1.8 V to 5.5 V - supports single-supply operation across battery-powered and 3.3V/5V systems |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI, DO) - minimal GPIO usage, no address bus required |
| Endurance | 1,000,000 erase/write cycles - suitable for frequent firmware parameter updates |
| Data Retention | >200 years at +25°C - ensures long-term reliability in unattended equipment |
| Operating Temp | −40°C to +85°C (Industrial grade) - validated for industrial control and automotive body electronics |
| Max Clock Freq | 3 MHz at VCC ≥ 4.5V; 2 MHz at 2.5V ≤ VCC < 4.5V - enables fast programming while maintaining low-power operation |
| Package | SOT-23-6 (OT) - 2.9 mm × 1.6 mm footprint, surface-mount, RoHS-compliant matte tin finish |
Pinout & Package
SOT-23-6 package (OT suffix), Pb-free matte tin finish, 2.9 mm × 1.6 mm body, 0.95 mm height, 0.95 mm pitch. Pin 1 marked by laser dot; pin 1 is DO (Data Out).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DO (Pin 1) | Data Output / Ready-Busy Indicator | Outputs read data on CLK rising edge; drives low during erase/write to signal busy state; high-Z when deselected or idle |
| VSS (Pin 2) | Ground Reference | Primary return path for all internal logic and I/O; must be low-impedance connection to system GND plane |
| DI (Pin 3) | Data Input | Accepts Start bit, opcodes, addresses, and write data on CLK rising edge; requires external pull-down if unused |
| VCC (Pin 4) | Power Supply | Supplies core logic and EEPROM array; bypass capacitor (0.1 µF) required within 5 mm of pin |
| CS (Pin 5) | Chip Select | Active-high enable; falling edge initiates self-timed erase/write; minimum TCSL = 250 ns between commands |
| CLK (Pin 6) | Serial Clock | Synchronizes all data transfers; rising edge clocks in/out bits; can be paused mid-transfer without error |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed Erase/Write | Eliminates need for external timing control - 6 ms typical program cycle (TWC) fully autonomous after CS fall |
| Automatic ERAL before WRAL | WRAL command internally executes full-array erase prior to write - no separate ERAL instruction required |
| Power-On/Off Data Protection | VCC brown-out detection at 1.5 V prevents inadvertent writes during power ramp-up/down |
| EWEN/EWDS Write Lock | Hardware-enforced write enable/disable - device powers up in EWDS (locked) state; explicit EWEN required before any programming |
| Sequential Read Mode | Holding CS high enables automatic address increment and continuous data stream - reduces host CPU overhead during bulk reads |
| Ready/Busy Status on DO | Enables polling-based programming flow without interrupt lines - simplifies firmware design in resource-constrained MCUs |
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 storage with infrequent writes and long-term retention; accessed via MCU's GPIO bit-banged Microwire interface. Use Value: Enables field recalibration without reprogramming MCU firmware; 1M endurance supports >100 calibrations/year over 10+ years. | Use Scenario: Retaining user-programmed channel presets, volume levels, and IR code learning history in universal remote controls. IC Role / Device Role / Timing Role: Low-power serial EEPROM interfaced to 8-bit MCU; accessed only during setup or button press events. Use Value: SOT-23-6 footprint saves PCB area in compact remotes; 1.8V operation extends battery life in coin-cell powered designs. |
| Automotive Body Control Module | Medical Infusion Pump Settings |
Use Scenario: Saving seat/mirror position memory, lighting profiles, and door lock preferences in automotive BCMs. IC Role / Device Role / Timing Role: Industrial-grade EEPROM interfaced to CAN-connected microcontroller; withstands under-hood thermal cycling. Use Value: −40°C to +85°C rating ensures reliability across vehicle lifetime; built-in ERAL/WRAL simplifies factory initialization routines. | Use Scenario: Storing drug library parameters, dose limits, alarm thresholds, and audit logs in Class II medical infusion pumps. IC Role / Device Role / Timing Role: Safety-critical nonvolatile memory with write-protection (EWEN/EWDS) and power-fail immunity. Use Value: VCC brown-out detection prevents corruption during battery swap; >200-year retention meets FDA long-term traceability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC46BT-I/OT | Same 64×16-bit organization and SOT-23-6 package, but 2.5–5.5V VCC range (no 1.8V support) | Not suitable for 1.8V battery-powered systems; otherwise identical timing, instruction set, and pinout | Select 93LC46BT-I/OT only if system VCC is guaranteed ≥2.5V and 1.8V operation is unnecessary |
| AT25010B-MAHL-T | 1 Kbit SPI EEPROM (8-pin SOIC), 1.8–5.5V, 20 MHz SPI interface, no Ready/Busy pin - uses status register polling | Requires SPI peripheral instead of bit-banged Microwire; larger footprint; higher speed but no DO-driven busy signal | Choose AT25010B-MAHL-T only if MCU has hardware SPI and board layout allows SOIC-8; not drop-in compatible |
Compared with 93LC46BT-I/OT, the 93AA46BT-I/OT adds 1.8V operation for ultra-low-power systems; compared with AT25010B-MAHL-T, it offers simpler GPIO-based interface and integrated Ready/Busy signaling but lower throughput and fixed Microwire protocol.
Availability
93AA46BT-I/OT is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer remote control memory, and automotive body control modules requiring stable component supply, long-life data retention, and SOT-23-6 footprint compatibility.
Supply support for 93AA46BT-I/OT 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 93AAxx series is designed specifically for cost-sensitive, space-constrained embedded systems requiring reliable, low-voltage serial EEPROM with Microwire interface and industrial temperature support.
FAQ
What is the memory organization of the 93AA46BT-I/OT?
The 93AA46BT-I/OT has a fixed 64 × 16-bit organization (1 Kbit total). Unlike 'C' variants, it lacks an ORG pin and is permanently configured for 16-bit word access. This eliminates external configuration logic and simplifies host software, as all READ/WRITE instructions always transfer 16 data bits per address.
Does the 93AA46BT-I/OT require an external pull-up resistor on the DO pin?
No, the 93AA46BT-I/OT does not require an external pull-up on DO. The DO pin actively drives high/low during READ or Ready/Busy status reporting and enters High-Z when deselected (CS low) or idle. A pull-up may cause contention during active drive; proper operation assumes DO is connected directly to MCU input or open-drain buffer.
How is write protection implemented in the 93AA46BT-I/OT?
The 93AA46BT-I/OT implements hardware write protection via EWEN (Erase/Write Enable) and EWDS (Erase/Write Disable) instructions. It powers up in EWDS state - all erase/write commands are ignored until EWEN is issued. After programming, executing EWDS relocks the device. This prevents accidental writes during power transients or firmware errors.
What is the minimum VCC required for reliable operation of the 93AA46BT-I/OT?
The 93AA46BT-I/OT requires VCC ≥ 1.8 V for functional operation and guarantees full specification compliance down to 1.8 V. Below 1.5 V, the internal voltage detector disables all programming functions to prevent data corruption - this brown-out threshold is inherent to the '93AA' family and is not user-adjustable.
Can the 93AA46BT-I/OT be used in place of the 93AA46AT-I/OT?
No, the 93AA46BT-I/OT cannot substitute for the 93AA46AT-I/OT without design review. The 'B' version is 64 × 16-bit; the 'A' version is 128 × 8-bit. They share the same SOT-23-6 package and pinout, but differ in address width, instruction timing (18 vs. 18/25 CLK cycles), and data framing - firmware and memory mapping must be updated accordingly.
93AA46BT-I/OT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- 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:
- SOT-23-6
93AA46BT-I/OT FAQ
1.How can I place an order for 93AA46BT-I/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA46BT-I/OT 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 93AA46BT-I/OT reliable?
The price and inventory of 93AA46BT-I/OT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93AA46BT-I/OT is usually 5 days.
3.What payment methods are accepted for 93AA46BT-I/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA46BT-I/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA46BT-I/OT?
93AA46BT-I/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA46BT-I/OT 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 93AA46BT-I/OT?
For technical support, including 93AA46BT-I/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA46BT-I/OT requirements.
6.How does Aetrix verify that 93AA46BT-I/OT is sourced from the original manufacturer or authorized distributors?
All 93AA46BT-I/OT 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 93AA46BT-I/OT meets industry standards.
7.What is the process for return or replacement of 93AA46BT-I/OT?
All 93AA46BT-I/OT units undergo pre-shipment inspection (PSI). If there is an issue with 93AA46BT-I/OT, 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 93AA46BT-I/OT part is unused and in its original packaging.
Return procedure for 93AA46BT-I/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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