My Inquiry
My Account
Microchip Technology 24FC04HT-E/Q4B
- Part No.:
- 24FC04HT-E/Q4B
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
24FC04HT-E/Q4B.pdf
- Description:
- IC EEPROM 4KBIT I2C 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
24FC04HT-E/Q4B from Microchip Technology Inc. is a 4-Kbit I²C-compatible serial EEPROM organized as two 256 × 8-bit blocks, operating from 1.7V to 5.5V with 1 MHz clock support, 16-byte page write buffer, and hardware half-array write-protection (100h–1FFh). It targets embedded system configuration storage in automotive and industrial controllers requiring extended temperature operation.
For engineers reviewing the 24FC04HT-E/Q4B datasheet, 24FC04HT-E/Q4B pinout, 24FC04HT-E/Q4B application, or 24FC04HT-E/Q4B equivalent, key selection criteria include its 1.7V minimum VCC, -40°C to +125°C extended temperature grade, Q4B (8-lead TDFN) package, 1 MHz I²C timing compliance, and half-array write-protect functionality.
Technical Context
The 24FC04HT-E/Q4B implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal address counter supports current-address, random, and sequential read modes, while the 16-byte page buffer enables efficient burst writes without host-side buffering.
Write protection is implemented via the WP pin: tied to VCC, it disables writes to addresses 100h–1FFh while allowing full read access; tied to VSS, full memory read/write is enabled. Acknowledge polling is supported to detect write cycle completion without fixed delays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Kbit (512 bytes), organized as two 256 × 8-bit blocks - enables independent block addressing for modular firmware/config storage. |
| Supply Voltage | 1.7V to 5.5V - supports direct interfacing with 1.8V, 2.5V, 3.3V, and 5V microcontrollers without level shifters. |
| I²C Clock Frequency | Up to 1 MHz at 1.7V–5.5V - doubles throughput vs. 400 kHz devices, reducing configuration time in high-volume production test. |
| Page Write Buffer | 16 bytes - allows single-stop write of up to 16 contiguous bytes, minimizing bus arbitration overhead and improving write efficiency. |
| Write Protection | Hardware half-array (100h–1FFh) via WP pin - secures critical calibration or security data while permitting runtime updates to user-configurable regions. |
| Endurance & Retention | 1 million erase/write cycles; >200 years data retention - suitable for infrequently updated but mission-critical parameter storage. |
| Temperature Range | -40°C to +125°C (Extended grade) - qualified for under-hood automotive, motor control, and industrial power electronics environments. |
Pinout & Package
24FC04HT-E/Q4B is packaged in an 8-lead TDFN (Thin Dual Flat No-lead) measuring 2 mm × 3 mm × 0.75 mm, with exposed pad (EP) optionally connected to VSS for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | Address Input (NC) | No internal connection; may be left floating or tied to VSS/VCC - eliminates external pull-up/down requirements and simplifies PCB layout. |
| VSS | Ground | Reference return path for all signals and power; EP pad may be soldered to ground plane for improved thermal dissipation. |
| SDA | Serial Data I/O | Open-drain bidirectional bus line requiring external pull-up (2 kΩ typical for 1 MHz); transmits/receives addresses, commands, and data. |
| SCL | Serial Clock Input | Master-generated clock synchronizing all I²C transactions; Schmitt-trigger input ensures noise immunity on long or noisy traces. |
| WP | Write-Protect Control | Logic-high (VCC) enables half-array protection (100h–1FFh); logic-low (VSS) enables full-memory write - provides hardware-enforced data integrity. |
| VCC | Power Supply | Single 1.7V–5.5V supply powers EEPROM core and I/O; low quiescent current (3 µA max at E-temp) minimizes standby power in battery-backed systems. |
Key Features
| Feature | Design Value |
|---|---|
| 1 MHz I²C Compatibility | Enables faster configuration loading in time-critical boot sequences, reducing system startup latency by up to 2.5× vs. 400 kHz EEPROMs. |
| Schmitt Trigger Inputs | Provides 50 mV hysteresis (0.05 × VCC) on SDA/SCL, rejecting transient noise up to 50 ns - critical for reliable operation in electrically harsh automotive environments. |
| Self-Timed Write Cycle | Eliminates need for host-controlled delay timers; internal 5 ms max write cycle completes autonomously, freeing MCU resources during nonvolatile updates. |
| ESD Protection | ≥4 kV HBM on all pins - meets IEC 61000-4-2 Level 2 requirements, reducing need for external TVS diodes in board-level ESD protection schemes. |
| AEC-Q100 Qualified | Qualified to Grade 1 (-40°C to +125°C) per AEC-Q100 Rev H - validates suitability for automotive powertrain, body control, and ADAS subsystems. |
Applications
| Automotive Body Control Module | Industrial Motor Drive Configuration |
|---|---|
Use Scenario: Storing calibrated sensor offsets, actuator limits, and user preferences across ignition cycles in door module ECUs. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with hardware write-protection for safety-critical parameters (e.g., window pinch detection thresholds). Use Value: WP pin prevents accidental overwrites during field firmware updates, ensuring regulatory-compliant behavior remains intact. |
Use Scenario: Holding motor tuning parameters (PID gains, commutation angles) and fault history logs in variable-frequency drives. IC Role / Device Role / Timing Role: High-reliability parameter store supporting 1 million+ write cycles and 200-year data retention at 125°C ambient. Use Value: 1.7V operation enables direct connection to 1.8V FPGA I/O banks, eliminating level-shifter components and associated BOM cost. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Settings |
Use Scenario: Securing factory-calibrated flow rate coefficients and drug library metadata in Class II medical devices. IC Role / Device Role / Timing Role: AEC-Q100-qualified EEPROM used for tamper-resistant calibration storage with audit-trail capability. Use Value: Half-array write-protection isolates immutable calibration data (100h–1FFh) from field-updatable operational settings (000h–0FFh). |
Use Scenario: Retaining tariff schedules, metering constants, and communication credentials across power outages in ANSI C12.22-compliant meters. IC Role / Device Role / Timing Role: Low-power serial EEPROM interfaced to 32-bit ARM Cortex-M host via 1 MHz I²C for rapid credential loading at boot. Use Value: 1 µA standby current (I-temp) and 3 µA (E-temp) extends backup battery life beyond 10 years in sealed meter enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA04HT-I/Q4B | Max clock 400 kHz; rated only for -40°C to +85°C (Industrial grade); same 1.7V–5.5V VCC range. | Lacks extended temperature support and high-speed timing - unsuitable for under-hood or high-ambient industrial use. | Select when cost sensitivity outweighs speed/temperature requirements and AEC-Q100 qualification is not mandated. |
| AT24C04D-SSHM-T | 4 Kbit I²C EEPROM; 1.7V–5.5V; 1 MHz capable; -40°C to +125°C; 8-lead SOIC package (not Q4B). | Different footprint (SOIC vs. TDFN) requires PCB redesign; no factory-programmable marking option. | Choose if SOIC assembly infrastructure exists and thermal profile constraints permit larger package; verify WP pin behavior matches. |
Compared with 24AA04HT-I/Q4B, the 24FC04HT-E/Q4B delivers 2.5× faster configuration writes and extended temperature reliability; versus AT24C04D-SSHM-T, it offers identical electrical specs but in a space-constrained 2×3 mm TDFN package with AEC-Q100 validation.
Availability
24FC04HT-E/Q4B is available at Aetrix Electronics and suitable for automotive body control modules, industrial motor drives, medical infusion pumps, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 24FC04HT-E/Q4B 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 microcontroller, analog, FPGA, and memory solutions, serving automotive, industrial, consumer, and communications markets with vertically integrated silicon and software tools.
The 24FC04H family is designed for robust, low-power nonvolatile data storage in space-constrained, thermally demanding applications where I²C interface simplicity and hardware write security are essential.
FAQ
What is the maximum I²C clock frequency supported by the 24FC04HT-E/Q4B?
The 24FC04HT-E/Q4B supports up to 1 MHz I²C clock frequency across its full 1.7V–5.5V supply range, enabling faster configuration reads and writes than 400 kHz alternatives. This specification is validated per AC Characteristic Table 1-2 in DS20002119C, with THIGH and TLOW times tightened to 260 ns and 500 ns respectively at 1 MHz.
How does the WP pin function on the 24FC04HT-E/Q4B?
On the 24FC04HT-E/Q4B, the WP pin enables hardware write-protection: when tied to VCC, writes to memory addresses 100h–1FFh are inhibited while reads remain fully functional; when tied to VSS, full read/write access to the entire 512-byte array is permitted. This behavior is documented in Section 2.4 and Figure 6-3 of DS20002119C.
Is the 24FC04HT-E/Q4B qualified for automotive applications?
Yes, the 24FC04HT-E/Q4B is AEC-Q100 qualified for Grade 1 (-40°C to +125°C) operation and is explicitly listed in the device selection table as automotive-qualified. Its extended temperature rating, 4 kV ESD protection, and robust I²C timing under voltage variation make it suitable for body control, lighting, and powertrain subsystems.
What package type does the 24FC04HT-E/Q4B use, and what are its dimensions?
The 24FC04HT-E/Q4B uses the Q4B package: an 8-lead TDFN (Thin Dual Flat No-lead) measuring 2.0 mm × 3.0 mm × 0.75 mm with an exposed thermal pad. Pinout matches standard 8-lead SOIC but with bottom-surface terminations, enabling high-density layouts and improved thermal performance over leaded packages.
Does the 24FC04HT-E/Q4B require external pull-up resistors on SDA and SCL lines?
Yes, the 24FC04HT-E/Q4B requires external pull-up resistors on both SDA and SCL lines because its I/O pins are open-drain. For 1 MHz operation, a 2 kΩ pull-up to VCC is recommended per Section 2.2 of DS20002119C; values scale inversely with bus capacitance and desired rise time, with 10 kΩ typical for 100 kHz legacy systems.
24FC04HT-E/Q4B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 4Kbit
- Memory Organization:
- 256 x 8 x 2
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 450 ns
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UDFN (2x3)
24FC04HT-E/Q4B FAQ
1.How can I place an order for 24FC04HT-E/Q4B through Aetrix?
Please submit a Request for Quotation (RFQ) for 24FC04HT-E/Q4B 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 24FC04HT-E/Q4B reliable?
The price and inventory of 24FC04HT-E/Q4B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24FC04HT-E/Q4B is usually 5 days.
3.What payment methods are accepted for 24FC04HT-E/Q4B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24FC04HT-E/Q4B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24FC04HT-E/Q4B?
24FC04HT-E/Q4B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24FC04HT-E/Q4B 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 24FC04HT-E/Q4B?
For technical support, including 24FC04HT-E/Q4B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24FC04HT-E/Q4B requirements.
6.How does Aetrix verify that 24FC04HT-E/Q4B is sourced from the original manufacturer or authorized distributors?
All 24FC04HT-E/Q4B 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 24FC04HT-E/Q4B meets industry standards.
7.What is the process for return or replacement of 24FC04HT-E/Q4B?
All 24FC04HT-E/Q4B units undergo pre-shipment inspection (PSI). If there is an issue with 24FC04HT-E/Q4B, 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 24FC04HT-E/Q4B part is unused and in its original packaging.
Return procedure for 24FC04HT-E/Q4B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24FC04HT-E/Q4B 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…
