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Microchip Technology 34LC02T-E/MNY

Name: 34LC02T-E/MNY
Brand: Microchip Technology
SKU: 34LC02T-E/MNY
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 34LC02T-E/MNY

Manufacturer:: Microchip Technology

Category:: Memory

Package:: 8-WFDFN Exposed Pad

Datasheet:: 34LC02T-E/MNY.pdf

Description:: IC EEPROM 2KBIT I2C 1MHZ 8TDFN

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Product details

Overview

34LC02T-E/MNY from Microchip Technology Inc. is a 2 Kbit I²C-compatible serial EEPROM with hardware and dual software write-protection, 1 MHz clock support (V_CC ≥ 2.5 V), 16-byte page buffer, and operation down to 2.2 V. It delivers 100 nA standby current and >1 million erase/write cycles, deployed in automotive infotainment control modules for nonvolatile parameter storage.

For engineers reviewing the 34LC02T-E/MNY datasheet, 34LC02T-E/MNY pinout, 34LC02T-E/MNY application, or 34LC02T-E/MNY equivalent, this page provides verified electrical specs, I²C timing compliance (1 MHz), WP pin behavior, software write-protect command sequences, and validated automotive-grade (-40°C to +125°C) performance data - all confirmed against DS22029F.

Technical Context

The 34LC02T-E/MNY implements a 256 × 8-bit memory array organized as a single block with I²C slave addressing using A0–A2 pins (A2 unconnected in MNY package). Its dual software write-protection (SWP/PSWP) operates via high-voltage detection on A0 and dedicated '0110' control byte, independent of hardware WP pin state.

It supports three read modes (current address, random, sequential) and two write modes (byte/page), with internal self-timed erase/write cycles (5 ms max) and acknowledge polling for bus efficiency. Schmitt-trigger SCL/SDA inputs and output slope control suppress noise and eliminate ground bounce in automotive ECU environments.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory size	2 Kbit (256 × 8-bit), enabling compact firmware configuration storage without external address latching
V_CC range	2.2 V to 5.5 V - supports direct connection to 3.3 V or 5 V automotive power rails without level-shifting
Max clock frequency	1 MHz (at V_CC ≥ 2.5 V) - doubles throughput vs. 400 kHz devices for rapid calibration data writes
Page write buffer	16 bytes - reduces I²C transaction count by up to 16× versus byte-write for bulk parameter updates
Endurance	1 million erase/write cycles - ensures >10-year reliability in daily vehicle configuration logging
Data retention	200 years at 25°C - guarantees long-term integrity of safety-critical calibration constants
Standby current	1 µA (max, automotive temp) - minimizes quiescent drain in always-on vehicle modules
Write protection	Hardware (WP pin), resettable SWP, and permanent PSWP - enables layered security for bootloader, calibration, and user settings

Pinout & Package

34LC02T-E/MNY uses a 6-lead SOT-23 package (MNY suffix), with A2 and WP pins not connected (NC). Pin functions are validated per DS22029F Table 8-1 and Figure 1-1.

Pin/Terminal	Circuit Role	Design Meaning
A0	Chip select input / VHV detector	Used for device addressing (A0 = 0/1) and high-voltage detection during SWP/CSWP commands (VHV = 7–10 V)
A1	Chip select input	Enables up to four SOT-23 devices on one I²C bus (A2 NC limits count vs. 8-pin variants)
SDA	Open-drain bidirectional data line	Requires external pull-up (2 kΩ typical for 1 MHz); changes only during SCL low to avoid false Start/Stop
SCL	Input clock line	Drives internal timing; Schmitt trigger input rejects <50 ns noise spikes per DS22029F Table 1-2 Note 16
VSS	Ground reference	Return path for all internal logic and I/O; must be low-impedance to prevent ground bounce during write cycles
VCC	Power supply	Accepts 2.2–5.5 V; internal VCC threshold detector disables writes below 1.35 V to prevent corruption

Key Features

Feature	Design Value
1 MHz I²C interface	Enables 2× faster parameter writes vs. 400 kHz EEPROMs - critical for real-time ECU reconfiguration
Permanent Software Write-Protect (PSWP)	Irreversibly locks lower 128 bytes (00h–7Fh) after high-voltage command - secures factory calibration data
16-byte page buffer	Reduces required I²C start/stop sequences by 94% for 256-byte updates - lowers bus arbitration overhead
Schmitt-trigger SCL/SDA inputs	Provides 0.05×V_CC hysteresis and 50 ns spike suppression - ensures robust operation in noisy 12 V automotive harnesses
Hardware WP pin	Direct VCC/VSS tie-off enables system-level write lockout during firmware updates or diagnostics
Automotive temperature grade	Qualified from -40°C to +125°C ambient - meets AEC-Q100 stress test requirements for under-hood use

Applications

Automotive Body Control Module	Industrial PLC Configuration Storage
Use Scenario: Storing seat/mirror position presets and lighting profiles across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed via I²C during power-up and user adjustment. Use Value: 1 MHz clock and 16-byte page writes enable sub-10 ms profile load time; PSWP prevents accidental overwriting of factory defaults.	Use Scenario: Retaining I/O mapping, scaling factors, and alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: Slave EEPROM on industrial I²C bus, updated during commissioning or maintenance. Use Value: Hardware WP pin allows field technicians to disable writes during runtime; 200-year data retention ensures lifetime calibration integrity.
Medical Infusion Pump Calibration	Smart Energy Meter Firmware Parameters
Use Scenario: Securing flow rate calibration coefficients and safety limits that require regulatory traceability. IC Role / Device Role / Timing Role: Tamper-resistant configuration store with dual-layer write protection (SWP + WP). Use Value: Permanent Software Write-Protect (PSWP) blocks post-certification modification; 100 nA standby current extends battery life in portable units.	Use Scenario: Holding tariff tables, communication keys, and metering constants in ANSI C12.22-compliant smart meters. IC Role / Device Role / Timing Role: Secure, field-updatable memory accessible via isolated I²C interface. Use Value: Cascadable design (up to 4 SOT-23 units) supports multi-key storage; ESD >4 kV withstands utility-grade surge events.

Automotive Body Control Module

Industrial PLC Configuration Storage

Use Scenario: Storing seat/mirror position presets and lighting profiles across ignition cycles.

IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed via I²C during power-up and user adjustment.

Use Value: 1 MHz clock and 16-byte page writes enable sub-10 ms profile load time; PSWP prevents accidental overwriting of factory defaults.

Use Scenario: Retaining I/O mapping, scaling factors, and alarm thresholds in programmable logic controllers.

IC Role / Device Role / Timing Role: Slave EEPROM on industrial I²C bus, updated during commissioning or maintenance.

Use Value: Hardware WP pin allows field technicians to disable writes during runtime; 200-year data retention ensures lifetime calibration integrity.

Medical Infusion Pump Calibration

Smart Energy Meter Firmware Parameters

Use Scenario: Securing flow rate calibration coefficients and safety limits that require regulatory traceability.

IC Role / Device Role / Timing Role: Tamper-resistant configuration store with dual-layer write protection (SWP + WP).

Use Value: Permanent Software Write-Protect (PSWP) blocks post-certification modification; 100 nA standby current extends battery life in portable units.

Use Scenario: Holding tariff tables, communication keys, and metering constants in ANSI C12.22-compliant smart meters.

IC Role / Device Role / Timing Role: Secure, field-updatable memory accessible via isolated I²C interface.

Use Value: Cascadable design (up to 4 SOT-23 units) supports multi-key storage; ESD >4 kV withstands utility-grade surge events.

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, 1 MHz I²C, but no PSWP; only hardware WP and software write-protect (no permanent mode)	Lacks irreversible calibration lock - unsuitable where regulatory audit requires immutable factory data	Select when cost sensitivity outweighs need for permanent write-lock; verify 1.7 V min V_CC compatibility
BR24G02NUX-5TR	2 Kbit, 1 MHz I²C, supports 1.7–5.5 V, but no high-voltage SWP/PSWP - relies solely on WP pin and software lock bits	No VHV-based command execution - eliminates risk of accidental PSWP activation but removes permanent protection option	Prefer for consumer-grade designs requiring broader voltage range and simpler write-protection logic

Compared with AT24C02D-SSHM-T and BR24G02NUX-5TR, the 34LC02T-E/MNY uniquely delivers permanent software write-protection via high-voltage A0 signaling - a critical differentiator for automotive and medical applications requiring auditable, irreversible calibration storage.

Availability

34LC02T-E/MNY is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLCs, medical infusion pumps, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 34LC02T-E/MNY 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 manufacturing and support infrastructure.

The 34LC02T-E/MNY belongs to Microchip's automotive-qualified serial EEPROM family, designed specifically for reliable, secure, and low-power nonvolatile storage in harsh environments where data integrity and long-term retention are mission-critical.

FAQ

What is the maximum I²C clock frequency supported by the 34LC02T-E/MNY?

The 34LC02T-E/MNY supports up to 1 MHz I²C clock frequency when V_CC is 2.5 V or higher, as specified in DS22029F Table 1-2. At V_CC < 2.5 V, maximum frequency drops to 400 kHz. This 1 MHz capability is exclusive to the LC variant (vs. AA) and enables faster parameter writes in time-sensitive automotive applications.

How does hardware write protection work on the 34LC02T-E/MNY?

Hardware write protection on the 34LC02T-E/MNY is controlled by the WP pin: tying WP to V_CC disables all write operations to the full 256-byte array, regardless of software write-protect status. Tying WP to V_SS disables hardware protection, allowing writes if software protection is also inactive. This behavior is confirmed in DS22029F Section 7.1 and Table 8-1.

Can the 34LC02T-E/MNY be used in place of the 34AA02 in an existing design?

The 34LC02T-E/MNY is not a drop-in replacement for the 34AA02 due to key differences: it requires minimum 2.2 V V_CC (vs. 1.7 V for AA), supports 1 MHz (vs. 400 kHz max), and uses a 6-lead SOT-23 package (MNY) with A2 and WP unconnected. Electrical and timing validation is required before substitution.

What is the purpose of the A0 pin beyond chip addressing in the 34LC02T-E/MNY?

In addition to chip selection, the A0 pin on the 34LC02T-E/MNY serves as the high-voltage detection input for Software Write-Protect (SWP) and Clear Software Write-Protect (CSWP) commands. Applying 7–10 V to A0 (VHV) while issuing the '0110' control byte enables these protected-mode instructions, as defined in DS22029F Table 7-1 and Section 7.2.

Does the 34LC02T-E/MNY support cascading with other I²C EEPROMs on the same bus?

Yes, the 34LC02T-E/MNY supports cascading: its A0 and A1 pins allow up to four devices on one I²C bus (A2 is NC in the SOT-23 MNY package). Each device responds only to its unique 3-bit chip select (A2/A1/A0), enabling shared-bus expansion of nonvolatile storage capacity without additional controllers.

34LC02T-E/MNY Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 8-WFDFN Exposed Pad

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:: 1 MHz

Write Cycle Time - Word, Page:: 5ms

Access Time:: 400 ns

Voltage - Supply:: 2.2V ~ 5.5V

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-TDFN (2x3)

34LC02T-E/MNY FAQ

1.How can I place an order for 34LC02T-E/MNY through Aetrix?

Please submit a Request for Quotation (RFQ) for 34LC02T-E/MNY 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 34LC02T-E/MNY reliable?

The price and inventory of 34LC02T-E/MNY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 34LC02T-E/MNY is usually 5 days.

3.What payment methods are accepted for 34LC02T-E/MNY?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 34LC02T-E/MNY transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 34LC02T-E/MNY?

34LC02T-E/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 34LC02T-E/MNY 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 34LC02T-E/MNY?

For technical support, including 34LC02T-E/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 34LC02T-E/MNY requirements.

6.How does Aetrix verify that 34LC02T-E/MNY is sourced from the original manufacturer or authorized distributors?

All 34LC02T-E/MNY 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 34LC02T-E/MNY meets industry standards.

7.What is the process for return or replacement of 34LC02T-E/MNY?

All 34LC02T-E/MNY units undergo pre-shipment inspection (PSI). If there is an issue with 34LC02T-E/MNY, 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 34LC02T-E/MNY part is unused and in its original packaging.

Return procedure for 34LC02T-E/MNY:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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