My Inquiry
My Account
Microchip Technology AT24C04B-TH-T
- Part No.:
- AT24C04B-TH-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT24C04B-TH-T.pdf
- Description:
- IC EEPROM 4KBIT I2C 1MHZ 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,370
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT24C04B-TH-T from Microchip Technology (formerly Atmel) is a 4-kbit two-wire serial EEPROM organized as 512 words × 8 bits, operating from 1.8 V to 5.5 V, featuring hardware write protection via the WP pin, 16-byte page write capability, and 1 MHz I²C compatibility at 5 V. It serves as nonvolatile configuration storage in embedded microcontroller systems requiring low-power, industrial-temperature operation.
For engineers reviewing the AT24C04B-TH-T datasheet, AT24C04B-TH-T pinout, AT24C04B-TH-T application, or AT24C04B-TH-T equivalent, key selection criteria include its TSSOP-8 package (8A2), 1.8–5.5 V supply range, 4K-bit density, hardware write protect functionality, and guaranteed 1 million write cycles with 100-year data retention.
Technical Context
The AT24C04B-TH-T implements a standard two-wire (I²C-compatible) serial interface with open-drain SDA and Schmitt-triggered SCL inputs for noise immunity. Its internal address counter supports current-address, random-address, and sequential read modes, while page write logic enables burst writes across 16-byte boundaries without rollover within the same page.
Device addressing uses hardwired A2/A1 pins (A0 is NC), allowing up to four AT24C04B devices on one bus. Write protection is controlled solely by the WP pin state - tied high to VCC for full-array lock, grounded for normal read/write access - independent of software control or address bits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4096 bits (512 × 8), sufficient for firmware calibration tables or device ID storage |
| Supply Voltage | 1.8 V to 5.5 V - supports direct interfacing with 1.8 V, 2.5 V, 3.3 V, and 5 V logic domains |
| I²C Clock Rate | Up to 1 MHz at 5 V; 400 kHz at 1.8/2.5/2.7 V - ensures timing compliance across voltage grades |
| Write Endurance | 1 million cycles - enables frequent parameter updates in telemetry or logging applications |
| Data Retention | 100 years at +25°C - guarantees long-term integrity of stored configuration or calibration data |
| Page Write Size | 16 bytes per page - optimizes write efficiency for block-based configuration saves |
| Operating Temp | −40°C to +85°C - qualified for industrial and automotive under-hood environments |
Pinout & Package
AT24C04B-TH-T is housed in an 8-lead Plastic Thin Shrink Small Outline Package (TSSOP), JEDEC standard 8A2, body size 4.4 mm × 3.0 mm × 1.2 mm max, lead pitch 0.65 mm, RoHS-compliant NiPdAu finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A0) | No-connect (NC) | Internally unused; must be grounded or left floating - no effect on addressing or operation |
| 2 (A1) | Hardware address input | Part of 2-bit device address (A2/A1); sets unique I²C slave address among up to four devices |
| 3 (A2) | Hardware address input | MSB of 2-bit device address; combined with A1, selects one of four possible 7-bit I²C addresses (0x50–0x53) |
| 4 (GND) | Ground reference | Return path for VCC and all signal currents; requires low-impedance PCB connection to minimize noise coupling |
| 5 (SDA) | Serial data bidirectional I/O | Open-drain output/input; requires external pull-up resistor (typically 2.2–10 kΩ) to VCC for I²C bus operation |
| 6 (SCL) | Serial clock input | Schmitt-triggered, filtered input; clocks data on rising edge and samples on falling edge per I²C protocol |
| 7 (WP) | Hardware write protect | Active-high lock: driven high to VCC disables all write operations (including page and byte writes) to entire memory array |
| 8 (VCC) | Power supply | Primary supply rail; decoupling capacitor (0.1 µF ceramic) required within 10 mm of pin for stable operation |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | Functional down to 1.8 V - eliminates level-shifting when interfacing with ultra-low-power MCUs or sensors |
| Hardware write protection | Dedicated WP pin provides tamper-resistant, power-cycle-persistent memory lock without firmware overhead |
| Page write capability | 16-byte burst writes reduce I²C transaction count by up to 15× versus byte-wise programming |
| Noise-immune inputs | Schmitt-triggered SCL and filtered inputs suppress EMI-induced glitches in electrically noisy industrial environments |
| High endurance & retention | 1M write cycles / 100-year data retention enables use in field-upgradable systems with infrequent but critical rewrites |
Applications
| Smart Meter Calibration Storage | Industrial PLC Configuration Backup |
|---|---|
Use Scenario: Storing meter-specific calibration coefficients and tariff tables that must survive power loss and field updates. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding factory-trimmed ADC gain/offset values and utility-defined billing parameters. Use Value: Enables field recalibration without firmware update; WP pin prevents accidental overwrites during live meter communication. | Use Scenario: Preserving user-defined I/O mapping, PID loop settings, and alarm thresholds across controller resets or brownouts. IC Role / Device Role / Timing Role: Persistent parameter store accessed via MCU's I²C peripheral during boot or runtime configuration changes. Use Value: Eliminates need for battery-backed SRAM; 1.8–5.5 V operation allows direct connection to PLC's 3.3 V or 5 V rails. |
| Medical Device Serial Numbering | Automotive Body Control Module Settings |
Use Scenario: Recording unique device identifiers, manufacturing date, and regulatory compliance codes in portable diagnostic tools. IC Role / Device Role / Timing Role: Secure identity vault storing UDI (Unique Device Identifier) and MDR-compliant traceability data. Use Value: WP pin ensures permanent write-once serialization; 100-year retention meets medical device lifecycle requirements. | Use Scenario: Saving seat position presets, mirror angles, and lighting profiles tied to driver key fobs in entry-level BCMs. IC Role / Device Role / Timing Role: User preference memory mapped into MCU's I²C address space for fast read/write during vehicle power-up. Use Value: TSSOP-8 footprint minimizes PCB area; −40°C to +85°C rating ensures reliability in cabin temperature extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C04D-SSHM-T | Same 4K-bit density and TSSOP-8 package, but newer revision with enhanced ESD robustness (4 kV HBM) and tighter AC timing specs | Preferred for new designs targeting higher reliability in electrostatic-prone assembly environments | Select AT24C04D-SSHM-T if upgrading for improved manufacturability or long-term supply assurance; pinout and firmware identical |
| M24C04-RMN6TP | 4K-bit I²C EEPROM in TSSOP-8, but rated only to +105°C (vs. +85°C), with slower 400 kHz max clock at all voltages | Suitable for extended-temperature industrial nodes where 1 MHz speed is unnecessary | Choose M24C04-RMN6TP only when ambient exceeds +85°C and lower speed is acceptable; verify WP pin behavior matches design |
Compared with AT24C04B-TH-T, AT24C04D-SSHM-T offers backward-compatible enhancements for robustness, while M24C04-RMN6TP trades speed and temperature grade for alternative supply-chain availability - both require no schematic or layout changes but differ in qualification scope and timing margins.
Availability
AT24C04B-TH-T is available at Aetrix Electronics and suitable for industrial PLCs, smart energy meters, medical diagnostics equipment, and automotive body control modules requiring stable component supply across multi-year production cycles.
Supply support for AT24C04B-TH-T 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 is a global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with broad industrial and automotive qualifications.
The AT24C04B series belongs to Microchip's legacy serial EEPROM product line, designed specifically for reliable, low-power nonvolatile data storage in resource-constrained embedded systems.
FAQ
What is the memory organization of the AT24C04B-TH-T?
The AT24C04B-TH-T contains 4096 bits of EEPROM memory organized as 512 words × 8 bits. It is internally divided into 32 pages of 16 bytes each, requiring a 9-bit word address for random access. This structure supports efficient page writes and ensures predictable addressing behavior across all supported voltage ranges.
Does the AT24C04B-TH-T support 1 MHz I²C operation across its full voltage range?
No - the AT24C04B-TH-T supports 1 MHz I²C clocking only at VCC = 5.0 V. At 1.8 V, 2.5 V, and 2.7 V, the maximum SCL frequency is 400 kHz. These limits are defined in the AC Characteristics table and must be observed to ensure reliable communication and meet setup/hold timing requirements.
How does the WP pin function on the AT24C04B-TH-T?
The WP (Write Protect) pin on the AT24C04B-TH-T is a hardware-controlled enable for write operations. When WP is driven high to VCC, the entire memory array is locked against writes (including byte and page writes). When WP is grounded, normal read/write access is permitted. No software command or address bit affects this protection.
Can the AT24C04B-TH-T be used in a 1.8 V system with I²C pull-up resistors tied to 1.8 V?
Yes - the AT24C04B-TH-T is fully specified for 1.8 V operation, including I²C interface levels. Pull-up resistors on SDA and SCL must be referenced to the same 1.8 V supply, and the microcontroller's I²C peripheral must be configured for 1.8 V logic levels and 400 kHz clock rate to maintain timing compliance.
What package type is used for the AT24C04B-TH-T?
The AT24C04B-TH-T uses an 8-lead Plastic Thin Shrink Small Outline Package (TSSOP), designated as JEDEC 8A2, with dimensions 4.4 mm × 3.0 mm × 1.2 mm max and 0.65 mm lead pitch. It features NiPdAu lead finish and is supplied in tape-and-reel format (5,000 units per reel).
AT24C04B-TH-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 4Kbit
- Memory Organization:
- 512 x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 550 ns
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
AT24C04B-TH-T FAQ
1.How can I place an order for AT24C04B-TH-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C04B-TH-T 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 AT24C04B-TH-T reliable?
The price and inventory of AT24C04B-TH-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C04B-TH-T is usually 5 days.
3.What payment methods are accepted for AT24C04B-TH-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C04B-TH-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C04B-TH-T?
AT24C04B-TH-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C04B-TH-T 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 AT24C04B-TH-T?
For technical support, including AT24C04B-TH-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C04B-TH-T requirements.
6.How does Aetrix verify that AT24C04B-TH-T is sourced from the original manufacturer or authorized distributors?
All AT24C04B-TH-T 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 AT24C04B-TH-T meets industry standards.
7.What is the process for return or replacement of AT24C04B-TH-T?
All AT24C04B-TH-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C04B-TH-T, 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 AT24C04B-TH-T part is unused and in its original packaging.
Return procedure for AT24C04B-TH-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24C04B-TH-T Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
