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Microchip Technology 34VL02T/SN
- Part No.:
- 34VL02T/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
34VL02T/SN.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,379
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Product details
Overview
34VL02T/SN from Microchip Technology Inc. is a 2 Kbit (256 × 8) I²C-compatible serial EEPROM with dual software write-protection (SWP/PSWP) for addresses 00h–7Fh and hardware write-protection via WP pin. It operates from 1.5V to 3.6V, draws only 1 mA typical read current and 100 nA typical standby current, and supports 100 kHz (VCC < 1.8V) or 400 kHz (VCC ≥ 1.8V) clock rates. It is used in battery-powered IoT sensors for secure parameter storage.
For engineers reviewing the 34VL02T/SN datasheet, 34VL02T/SN pinout, 34VL02T/SN application, or 34VL02T/SN equivalent, key selection criteria include low-voltage operation down to 1.5V, 16-byte page write buffer, Schmitt-triggered SDA/SCL inputs for noise immunity, hardware + permanent/resettable software write protection, and compatibility with cascaded I²C bus configurations up to eight devices.
Technical Context
The 34VL02T/SN implements a true 2-wire I²C slave interface with standard 7-bit addressing (1010xxxR/W), supporting byte and page writes (max 16 bytes per page), current-address/random/sequential reads, and acknowledge polling for write-cycle completion detection. Its internal address pointer auto-increments during sequential operations.
Write protection is implemented at three levels: hardware (WP pin tied to VCC locks full 256-byte array), resettable software (SWP command protects lower 128 bytes, cleared by CSWP), and permanent software (PSWP command irreversibly locks lower 128 bytes). All protection modes coexist and are enforced independently.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit array), sufficient for firmware configuration, calibration data, or device identity storage in space-constrained designs |
| Supply voltage | 1.5V to 3.6V - enables direct integration with single-cell Li-ion, coin-cell, or low-power MCU rails without level-shifting |
| Interface speed | 100 kHz (VCC < 1.8V) or 400 kHz (VCC ≥ 1.8V) - balances timing margin and throughput for embedded control loops |
| Page write buffer | 16-byte buffer - reduces I²C transaction count by 16× vs. byte writes, lowering bus occupancy and power consumption |
| Endurance & retention | 1 million erase/write cycles and >200 years data retention - validated for long-life industrial logging and medical device calibration storage |
| ESD protection | >4 kV HBM - meets IEC 61000-4-2 Level 2 for robustness in handheld and field-deployed equipment |
| Operating temperature | –20°C to +85°C - qualified for commercial and extended-temperature industrial environments |
Pinout & Package
34VL02T/SN is packaged in a Pb-free, RoHS-compliant 6-lead SOT-23 package (3.0 mm × 1.7 mm × 1.3 mm height), optimized for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: SCL | Serial Clock input | Synchronizes all I²C transactions; Schmitt-triggered for noise immunity on shared buses |
| 2: VSS | Ground reference | Common return path for logic and internal HV generator; must be low-impedance for stable write timing |
| 3: SDA | Serial Data bidirectional I/O | Open-drain output requiring external pull-up; supports multi-master arbitration and ACK/NACK signaling |
| 4: A1 | Chip select bit | Part of 3-bit device address (A2/A1/A0); enables up to eight 34VL02T/SN devices on one I²C bus |
| 5: A0 | Chip select bit / VHV detect | Used for device addressing and high-voltage detection (7–10 V) during SWP/CSWP command execution |
| 6: VCC | Power supply | Accepts 1.5V–3.6V; internal voltage monitor disables writes below 1.35V to prevent corruption during brown-out |
Key Features
| Feature | Design Value |
|---|---|
| Permanent + resettable software write-protect | PSWP locks lower 128 bytes permanently; SWP provides field-upgradable protection that can be cleared via CSWP command |
| Hardware write-protect pin (WP) | WP tied to VCC disables all writes to full 256-byte array - independent of software state and survives power loss |
| Schmitt-trigger inputs & slope control | SDA/SCL inputs suppress noise spikes ≥50 ns; controlled output slew eliminates ground bounce in mixed-signal systems |
| Self-timed erase/write cycle | No external timing components required; internal HV generator manages programming pulses - simplifies BOM and layout |
| Cascadable I²C architecture | Three address pins (A2/A1/A0) support up to eight devices on one bus, enabling scalable memory expansion without additional controllers |
Applications
| Smart Meter Calibration Storage | Wearable Health Sensor Configuration |
|---|---|
|
Use Scenario: Storing factory-calibrated ADC offset/gain coefficients and user-specific thresholds in utility-grade electricity meters. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during boot and periodic self-test; retains values across 10+ year service life. Use Value: Enables field-replaceable meter modules without recalibration; PSWP prevents accidental overwrites of critical calibration data. |
Use Scenario: Holding patient-specific biometric baselines (e.g., resting heart rate, SpO₂ range) and sensor fusion parameters in Bluetooth-enabled ECG patches. IC Role / Device Role / Timing Role: Low-power I²C slave storing persistent settings updated infrequently but read at every measurement cycle. Use Value: 100 nA standby current extends coin-cell battery life beyond 12 months; 1.5V operation ensures reliability during battery voltage decay. |
| Industrial PLC Firmware Parameter Backup | Automotive Body Control Module NVM |
|
Use Scenario: Backing up runtime-modified PID loop constants and alarm thresholds in programmable logic controllers exposed to electrical noise. IC Role / Device Role / Timing Role: Fail-safe nonvolatile storage synchronized with watchdog resets; accessed only during configuration changes. Use Value: Schmitt-triggered SDA/SCL inputs reject EFT bursts per IEC 61000-4-4; >4 kV HBM withstands handling in factory environments. |
Use Scenario: Storing seat position memory, mirror presets, and lighting profiles in automotive body control units with strict AEC-Q200 alignment. IC Role / Device Role / Timing Role: I²C-configurable NVM component operating within vehicle's 12V rail (via LDO) and surviving cold-crank conditions. Use Value: Validated –20°C to +85°C operation covers under-hood and cabin zones; hardware WP pin prevents corruption during ignition transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C02C-SSHM-T (Microchip) | Same 2 Kbit capacity, 1.7V–5.5V VCC, no PSWP; includes write-cycle interrupt (WC) pin | Lacks permanent software protection; requires external circuitry for full-array hardware lock | Choose when wider voltage range and interrupt-driven write completion are prioritized over irreversible data lockdown |
| BR24G02-3MNUC (ROHM) | 2 Kbit, 1.6V–5.5V, 1 MHz I²C, built-in error correction code (ECC), no PSWP or WP pin | Higher speed and ECC improve reliability in high-noise automotive domains but omit hardware-level write disable | Prefer for mission-critical automotive subsystems where data integrity outweighs write-protection granularity |
Compared with AT24C02C-SSHM-T and BR24G02-3MNUC, the 34VL02T/SN uniquely delivers triple-layer write protection (hardware + resettable + permanent) within a 1.5V–3.6V envelope, making it optimal for tamper-resilient, ultra-low-power edge nodes where data immutability is mandated.
Availability
34VL02T/SN is available at Aetrix Electronics and suitable for smart meter calibration storage, wearable health sensor configuration, and industrial PLC firmware parameter backup requiring stable component supply across multi-year production cycles.
Supply support for 34VL02T/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 infrastructure.
The 34VL02T/SN belongs to Microchip's low-voltage serial EEPROM product line, engineered specifically for energy-constrained, security-sensitive embedded systems requiring guaranteed data integrity and long-term retention without external supervision.
FAQ
What is the minimum operating voltage for the 34VL02T/SN?
The 34VL02T/SN operates down to 1.5V, with guaranteed functionality across its full 1.5V–3.6V supply range. Below 1.35V, the internal voltage detector disables write operations to prevent data corruption during brown-out events - a safeguard confirmed in DS22079A-page 10.
Does the 34VL02T/SN support page writes, and what is the buffer size?
Yes, the 34VL02T/SN supports page writes with a 16-byte buffer, allowing up to 16 bytes to be written in a single I²C transaction. This capability is explicitly defined in DS22079A-page 1 and verified in Section 4.2 "Page Write", reducing bus overhead versus individual byte writes.
How does hardware write protection work on the 34VL02T/SN?
Hardware write protection on the 34VL02T/SN is controlled by the WP pin: tying WP to VCC disables all writes to the entire 256-byte memory array, regardless of software write-protect status or power cycling. This behavior is documented in DS22079A-page 14 (Section 8.4) and Table 7-2.
Can the permanent software write-protect (PSWP) feature on the 34VL02T/SN be reversed?
No, the PSWP feature on the 34VL02T/SN is irreversible once executed. After issuing the PSWP command, the lower 128 bytes (00h–7Fh) are permanently locked, and the device will no longer acknowledge the '0110' device identifier used for SWP/CSWP commands - as specified in DS22079A-page 12 (Section 7.3) and Table 7-1.
What package type is used for the 34VL02T/SN variant?
The 34VL02T/SN uses a 6-lead SOT-23 package, as confirmed by the "Package Types" table on DS22079A-page 1 and Pin Function Table (DS22079A-page 14), where A2 and WP are marked NC and pin assignments match the SOT-23 layout (SCL=1, VSS=2, SDA=3, A1=4, A0=5, VCC=6).
34VL02T/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 8-SOIC
34VL02T/SN FAQ
1.How can I place an order for 34VL02T/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 34VL02T/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 34VL02T/SN reliable?
The price and inventory of 34VL02T/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 34VL02T/SN is usually 5 days.
3.What payment methods are accepted for 34VL02T/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 34VL02T/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 34VL02T/SN?
34VL02T/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 34VL02T/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 34VL02T/SN?
For technical support, including 34VL02T/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 34VL02T/SN requirements.
6.How does Aetrix verify that 34VL02T/SN is sourced from the original manufacturer or authorized distributors?
All 34VL02T/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 34VL02T/SN meets industry standards.
7.What is the process for return or replacement of 34VL02T/SN?
All 34VL02T/SN units undergo pre-shipment inspection (PSI). If there is an issue with 34VL02T/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 34VL02T/SN part is unused and in its original packaging.
Return procedure for 34VL02T/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
34VL02T/SN Tags
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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