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Microchip Technology 34VL02T/OT
- Part No.:
- 34VL02T/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SOT-23-6
- Datasheet:
-
34VL02T/OT.pdf
- Description:
- IC EEPROM 2KBIT I2C SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,980
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Product details
Overview
34VL02T/OT from Microchip Technology Inc. is a 2 Kbit I²C-compatible serial EEPROM with software and hardware write protection, operating from 1.5V to 3.6V. It features 16-byte page write buffer, 100 nA standby current, and Schmitt-trigger inputs for noise immunity. Used in embedded system configuration storage where low-voltage operation and data integrity are critical.
For engineers reviewing the 34VL02T/OT datasheet, 34VL02T/OT pinout, 34VL02T/OT application, or 34VL02T/OT equivalent, this page delivers verified electrical specs, package mapping, I²C timing compliance (100/400 kHz), endurance (1M cycles), and real-world write-protect behavior - all confirmed against Microchip DS22079A.
Technical Context
The 34VL02T/OT implements a 256 × 8-bit memory array organized as a single block, accessed via standard I²C protocol with 7-bit slave address (1010xxxR/W) and chip-select pins A0–A2 enabling up to eight devices on one bus. Its dual software write-protect mechanism (SWP and PSWP) targets addresses 00h–7Fh, while the WP pin provides hardware-level full-array protection.
Internally, it uses CMOS technology with high-voltage detection on A0 for SWP/CSWP command validation, self-timed erase/write cycles, and output slope control to suppress ground bounce. The device includes VCC threshold detection (<1.35V disable) and input filtering (50 ns spike suppression) for robust operation in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit), single-block organization for simple addressing and firmware compatibility |
| Supply Voltage | 1.5V to 3.6V - enables direct interface with 1.8V/2.5V/3.3V logic without level shifters |
| I²C Clock Frequency | Up to 400 kHz (≥1.8V); 100 kHz only below 1.8V - defines maximum write throughput and bus loading requirements |
| Page Write Buffer | 16 bytes - reduces I²C transaction count for multi-byte writes, improving system efficiency |
| Endurance & Retention | 1 million erase/write cycles; >200 years data retention - suitable for long-life field-deployed devices |
| Standby Current | 100 nA typical - critical for battery-powered systems requiring ultra-low quiescent power |
| ESD Protection | >4 kV HBM - ensures reliability during handling and board assembly without additional protection circuitry |
Pinout & Package
34VL02T/OT is supplied in Pb-free, RoHS-compliant 6-lead SOT-23 package (JEDEC MO-178AA). Pin 1 = SCL, Pin 2 = VSS, Pin 3 = SDA, Pin 4 = A1, Pin 5 = A0, Pin 6 = VCC. No A2 or WP pins are present in this variant - hardware write protection is not supported in SOT-23 configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCL | Serial Clock Input | Master-generated clock synchronizing all I²C transfers; requires external pull-up resistor |
| VSS | Ground Reference | Return path for all internal circuits; must be low-impedance connection to system GND plane |
| SDA | Bidirectional Data I/O | Open-drain line shared across I²C bus; requires external pull-up and supports multi-master arbitration |
| A1 | Chip Select Bit | Part of 3-bit address (A2/A1/A0); sets device address offset (0x50–0x57) when multiple units share bus |
| A0 | Chip Select Bit / HV Detect | Used for device addressing and high-voltage detection (7–10V) during SWP/CSWP command execution |
| VCC | Power Supply | Single supply input (1.5–3.6V); powers internal logic, memory array, and I/O buffers |
Key Features
| Feature | Design Value |
|---|---|
| Permanent & Resettable Software Write-Protect | PSWP locks addresses 00h–7Fh permanently; SWP enables reversible protection - enables secure boot parameter storage |
| Low-Voltage Operation Down to 1.5V | Eliminates need for voltage regulators in energy-harvesting or coin-cell applications - extends usable battery life |
| 16-Byte Page Write Buffer | Reduces required I²C transactions by up to 16× vs. byte-write mode - lowers CPU overhead and bus contention |
| Schmitt Trigger Inputs + 50 ns Spike Filtering | Rejects EMI-induced glitches on SCL/SDA - prevents spurious Start/Stop conditions in electrically noisy environments |
| Output Slope Control | Controls edge rate of SDA transitions - minimizes ground bounce and crosstalk in dense PCB layouts |
Applications
| Industrial Sensor Calibration Storage | Medical Device Configuration Memory |
|---|---|
|
Use Scenario: Storing calibrated sensor offsets and gain coefficients in factory-programmed medical-grade temperature/humidity sensors. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding calibration constants accessed at power-up before ADC initialization. Use Value: PSWP ensures factory calibration data cannot be overwritten in field - eliminates recalibration risk after deployment. |
Use Scenario: Retaining user-selected therapy parameters (e.g., dosage, duration, alarm thresholds) across power cycles in portable infusion pumps. IC Role / Device Role / Timing Role: I²C slave storing persistent settings updated only during clinician programming sessions. Use Value: 100 nA standby current extends battery life between charges; SWP allows safe field updates while protecting safety-critical defaults. |
| Smart Meter Firmware Parameter Table | Automotive Body Control Module Settings |
|
Use Scenario: Holding tariff schedules, billing intervals, and communication protocol flags in ANSI C12.19-compliant electricity meters. IC Role / Device Role / Timing Role: Secure configuration store accessed via isolated I²C bus during meter initialization and firmware updates. Use Value: Hardware-level isolation (no WP pin) in SOT-23 variant avoids accidental full-array lockout during field firmware upgrades. |
Use Scenario: Saving seat position, mirror angle, and lighting preferences in automotive door modules compliant with ISO 11898-2. IC Role / Device Role / Timing Role: Low-voltage EEPROM interfacing directly with 1.8V microcontroller GPIOs in CAN-connected ECUs. Use Value: 1.5V operation enables direct connection to 1.8V MCU I²C peripherals - removes level-shifter BOM cost and layout complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C02D-SSHM-T | 2 Kbit I²C EEPROM; 1.7–5.5V supply; no permanent software write-protect; WP pin always present | Lacks PSWP - unsuitable for applications requiring irreversible factory calibration lock | Select if full hardware write protection and wider voltage range are prioritized over permanent software lock |
| BR24G02NUX-5TR | 2 Kbit I²C EEPROM; 1.6–5.5V; built-in write-protect register; no high-voltage SWP command support | Uses register-based protection instead of HV-triggered PSWP/SWP - less secure against voltage glitch attacks | Choose when simplified software protection model suffices and JEDEC-standard 8-pin SOIC is preferred over SOT-23 |
Compared with AT24C02D-SSHM-T and BR24G02NUX-5TR, the 34VL02T/OT uniquely delivers permanent software write-protection (PSWP) validated by high-voltage A0 detection - a hardware-enforced security feature absent in both alternatives and essential for tamper-resistant calibration storage.
Availability
34VL02T/OT is available at Aetrix Electronics and suitable for industrial sensor calibration storage, medical device configuration memory, smart meter firmware parameter tables, and automotive body control module settings requiring stable component supply across extended product lifecycles.
Supply support for 34VL02T/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 components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 34VL02T/OT belongs to Microchip's low-voltage serial EEPROM product line, designed specifically for space-constrained, battery-operated, and industrial-grade applications demanding robust data retention and flexible write protection.
FAQ
What is the minimum operating voltage for the 34VL02T/OT?
The 34VL02T/OT operates down to 1.5V, enabling direct interface with ultra-low-power microcontrollers and energy-harvesting systems. Below 1.8V, I²C clock frequency is limited to 100 kHz per DS22079A specification. This 1.5V capability is confirmed in the Absolute Maximum Ratings and DC Characteristics tables of the official datasheet.
Does the 34VL02T/OT support permanent write protection?
Yes, the 34VL02T/OT supports Permanent Software Write-Protect (PSWP) for addresses 00h–7Fh, activated via a high-voltage command sequence applied to the A0 pin. Once executed, PSWP cannot be cleared by power cycling, software commands, or WP pin state - a hardware-enforced security feature unique to this Microchip EEPROM family.
What package type is used for the 34VL02T/OT?
The 34VL02T/OT is packaged in a 6-lead SOT-23 (JEDEC MO-178AA) with Pb-free, RoHS-compliant finish. Unlike the 8-lead variants, this version omits A2 and WP pins - confirming hardware write protection is unavailable in this form factor, as documented in the Pin Function Table (DS22079A, page 14).
How many devices can be cascaded on a single I²C bus using the 34VL02T/OT?
Up to eight 34VL02T/OT devices can be cascaded on one I²C bus using the A0 and A1 pins for chip selection. Since the SOT-23 variant lacks A2, only four unique addresses (0x50–0x53) are available - limiting daisy-chaining to four units unless external address decoding is implemented.
What is the typical standby current consumption of the 34VL02T/OT?
The 34VL02T/OT draws 100 nA typical standby current when SDA = SCL = VCC and A0/A1/WP = VSS, as specified in Table 1-1 (D11) of DS22079A. This ultra-low quiescent draw makes it suitable for battery-backed systems requiring multi-year operation without recharge.
34VL02T/OT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 256 x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 1.5V ~ 3.6V
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
34VL02T/OT FAQ
1.How can I place an order for 34VL02T/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 34VL02T/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 34VL02T/OT reliable?
The price and inventory of 34VL02T/OT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 34VL02T/OT is usually 5 days.
3.What payment methods are accepted for 34VL02T/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 34VL02T/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 34VL02T/OT?
34VL02T/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 34VL02T/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 34VL02T/OT?
For technical support, including 34VL02T/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 34VL02T/OT requirements.
6.How does Aetrix verify that 34VL02T/OT is sourced from the original manufacturer or authorized distributors?
All 34VL02T/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 34VL02T/OT meets industry standards.
7.What is the process for return or replacement of 34VL02T/OT?
All 34VL02T/OT units undergo pre-shipment inspection (PSI). If there is an issue with 34VL02T/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 34VL02T/OT part is unused and in its original packaging.
Return procedure for 34VL02T/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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