My Inquiry
My Account
Microchip Technology 24AA08HT-I/SN
- Part No.:
- 24AA08HT-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24AA08HT-I/SN.pdf
- Description:
- IC EEPROM 8KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,341
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
24AA08HT-I/SN from Microchip Technology Inc. is an 8 Kbit I²C-compatible serial EEPROM organized as four 256 × 8-bit memory blocks, operating from 1.7V to 5.5V with 400 kHz max clock frequency, 16-byte page write buffer, and hardware write-protect for addresses 200h–3FFh. It serves as nonvolatile configuration storage in embedded control modules requiring low-voltage operation and industrial temperature resilience.
For engineers reviewing the 24AA08HT-I/SN datasheet, 24AA08HT-I/SN pinout, 24AA08HT-I/SN application, or 24AA08HT-I/SN equivalent, key selection criteria include its 1.7V minimum VCC, 1 μA standby current, Schmitt-trigger I²C inputs, half-array write-protection via WP pin, and SOIC-8 industrial-grade packaging.
Technical Context
The 24AA08HT-I/SN implements a slave-only I²C interface with fixed 7-bit device address prefix '1010' and 3-bit block-select addressing (B2–B0), enabling access to four independent 256-word memory blocks. Its internal address pointer auto-increments during sequential reads and page writes, supporting current-address, random, and sequential read modes.
Write protection is implemented via the WP pin: tied to VCC, it disables writes to the upper 2 Kbytes (200h–3FFh); tied to VSS, full array access is enabled. The device uses on-chip charge pumps for erase/write operations and includes VCC threshold detection (<1.5V) to inhibit programming during brown-out conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1024 × 8), organized as four 256-word blocks - enables segmented firmware/config storage with independent block addressing. |
| VCC Range | 1.7V to 5.5V - supports direct interfacing with 1.8V, 2.5V, 3.3V, and 5V microcontrollers without level-shifting. |
| I²C Clock Frequency | Up to 400 kHz (100 kHz below 2.5V) - ensures compatibility with standard and fast-mode I²C masters across voltage ranges. |
| Page Write Buffer | 16 bytes - reduces bus overhead by allowing burst writes within a single page boundary (00h–0Fh, 10h–1Fh, etc.). |
| Endurance & Retention | 1 million erase/write cycles; >200 years data retention - suitable for infrequent but mission-critical parameter logging or calibration storage. |
| Standby Current | 1 μA max at TA = –40°C to +85°C - minimizes power draw in always-on systems such as smart sensors or battery-backed controllers. |
| ESD Protection | >4 kV HBM - enhances robustness against handling and board-level ESD events in industrial assembly environments. |
Pinout & Package
24AA08HT-I/SN is supplied in an 8-lead plastic SOIC package (3.90 mm body width), RoHS-compliant, with gull-wing leads and JEDEC-standard footprint (SOIC-8). Pin 1 is marked with a beveled corner or notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | No-connect (NC) | Internally unconnected; may be left floating or tied to VSS/VCC with no functional impact - simplifies PCB routing and eliminates address conflict concerns. |
| VSS | Ground reference | Primary return path for all internal logic and I/O; must be low-impedance and decoupled near VCC pin. |
| SDA | Serial data I/O | Open-drain bidirectional bus line requiring external pull-up (2–10 kΩ); carries device address, memory address, and data during I²C transactions. |
| SCL | Serial clock input | Master-generated clock synchronizing all data transfers; Schmitt-trigger input suppresses noise-induced false edges. |
| WP | Hardware write-protect control | Active-high enable: tie to VCC to lock addresses 200h–3FFh; tie to VSS for full-array write access - provides tamper-resistant configuration partitioning. |
| VCC | Power supply | Single 1.7–5.5V supply powering EEPROM core and I/O; internal regulation ensures stable operation across voltage range. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation down to 1.7V | Enables direct integration into 1.8V logic domains without voltage translation, reducing BOM count and layout complexity. |
| Schmitt-trigger SDA/SCL inputs | Provides 50 mV hysteresis (0.05×VCC) and 50 ns spike suppression - eliminates need for external RC filtering on noisy industrial buses. |
| Self-timed write cycle (5 ms max) | Removes requirement for precise software timing delays; ACK polling allows deterministic host synchronization without fixed wait states. |
| Hardware write-protect for upper 2 Kbytes | Prevents accidental overwrites of critical calibration or security data while permitting runtime updates to user-configurable parameters in lower memory. |
| 16-byte page write buffer | Reduces I²C transaction count by up to 16× versus byte-write mode - improves bus efficiency in high-throughput configuration loading scenarios. |
Applications
| Industrial Sensor Calibration Storage | Smart Meter Firmware Parameter Table |
|---|---|
|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and temperature compensation tables in programmable industrial transmitters. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent calibration data accessed at power-up and during field recalibration. Use Value: Ensures measurement accuracy traceability across product lifetime; 200-year retention eliminates periodic reprogramming requirements. |
Use Scenario: Holding tariff schedules, billing registers, and communication protocol settings in ANSI C12.19-compliant electricity meters. IC Role / Device Role / Timing Role: Secure, low-power parameter store updated only during firmware upgrades or utility command execution. Use Value: WP pin protects revenue-critical tariff data from corruption during brown-out or firmware update glitches. |
| PLC I/O Module Configuration | Medical Device Setup Profile Storage |
|
Use Scenario: Saving channel-specific scaling factors, alarm thresholds, and input filter settings in modular programmable logic controller backplanes. IC Role / Device Role / Timing Role: Slave EEPROM providing fast, deterministic configuration load during module hot-swap initialization. Use Value: 400 kHz I²C interface enables sub-10 ms full-module configuration restore, meeting IEC 61131-2 response time requirements. |
Use Scenario: Storing user-defined therapy profiles, safety limits, and audit logs in Class IIa infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Certified nonvolatile memory retaining critical operational parameters through battery swaps and power cycling. Use Value: 1 μA standby current extends backup battery life beyond 5 years; >4 kV ESD rating meets IEC 60601-1-2 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC08BHT-I/SN | Requires minimum 2.5V VCC; otherwise identical pinout, timing, and memory map. | Not suitable for 1.8V systems; acceptable where 3.3V/5V supply is guaranteed and lower quiescent current is not required. | Select 24LC08BHT-I/SN only when system VCC ≥2.5V and cost sensitivity outweighs low-voltage flexibility. |
| AT24C08D-SSHM-T | Same 8 Kbit capacity, SOIC-8, I²C interface, but rated for 1.7–5.5V and offers 1 M endurance; lacks dedicated WP pin - write protection requires software or external logic. | Requires firmware-level protection scheme; unsuitable where hardware-enforced memory partitioning is mandated by safety standards. | Choose AT24C08D-SSHM-T when WP functionality is unnecessary and cross-manufacturer second sourcing is prioritized. |
Compared with 24LC08BHT-I/SN, the 24AA08HT-I/SN enables reliable operation in 1.8V systems and offers simpler hardware-based write protection; versus AT24C08D-SSHM-T, it provides deterministic, pin-controlled memory segmentation critical for functional safety designs.
Availability
24AA08HT-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration storage, smart meter firmware parameter tables, PLC I/O module configuration, medical device setup profile storage, and embedded controller boot configuration requiring stable component supply across extended temperature and voltage ranges.
Supply support for 24AA08HT-I/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 microcontroller, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design, manufacturing, and sales operations.
The 24AA08H family was designed specifically for low-voltage, industrial-grade serial EEPROM applications demanding robust I²C communication, hardware write protection, and extended data retention in space-constrained embedded systems.
FAQ
What is the minimum operating voltage for the 24AA08HT-I/SN?
The 24AA08HT-I/SN operates down to 1.7V DC, making it compatible with 1.8V logic families without level shifters. This specification is validated across the full industrial temperature range (–40°C to +85°C) and applies to both read and write operations. Below 1.7V, the internal VCC detector disables write functions to prevent data corruption.
How does the WP pin function on the 24AA08HT-I/SN?
On the 24AA08HT-I/SN, the WP pin is a hardware write-protect control: when tied to VCC, writes to memory addresses 200h–3FFh (upper 2 Kbytes) are inhibited while reads remain fully functional; when tied to VSS, full-array write access is enabled. This enables secure partitioning of calibration data from user-modifiable parameters.
What is the maximum I²C clock frequency supported by the 24AA08HT-I/SN?
The 24AA08HT-I/SN supports up to 400 kHz I²C clock frequency when VCC is 2.5V or higher. At VCC between 1.7V and 2.5V, the maximum clock frequency is reduced to 100 kHz to ensure reliable timing margins. Both modes are fully compliant with I²C standard and fast-mode specifications.
Does the 24AA08HT-I/SN require external pull-up resistors on SDA and SCL lines?
Yes, the 24AA08HT-I/SN requires external pull-up resistors on both SDA and SCL lines because its I/O pins are open-drain. Recommended values are 10 kΩ for 100 kHz operation and 2 kΩ for 400 kHz operation, referenced to the same VCC rail supplying the device. Incorrect pull-up values may cause bus timing violations or signal integrity issues.
What memory organization does the 24AA08HT-I/SN use, and how is addressing handled?
The 24AA08HT-I/SN organizes its 8 Kbit memory as four independent 256-word blocks (000h–0FFh, 100h–1FFh, 200h–2FFh, 300h–3FFh). Addressing uses a 7-bit I²C device address (1010xxx) plus 3-bit block-select bits (B2–B0) in the control byte, followed by an 8-bit word address within the selected block - enabling precise per-block access without bank switching overhead.
24AA08HT-I/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:
- 8Kbit
- Memory Organization:
- 256 x 8 x 4
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
24AA08HT-I/SN FAQ
1.How can I place an order for 24AA08HT-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA08HT-I/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 24AA08HT-I/SN reliable?
The price and inventory of 24AA08HT-I/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24AA08HT-I/SN is usually 5 days.
3.What payment methods are accepted for 24AA08HT-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA08HT-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA08HT-I/SN?
24AA08HT-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA08HT-I/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 24AA08HT-I/SN?
For technical support, including 24AA08HT-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA08HT-I/SN requirements.
6.How does Aetrix verify that 24AA08HT-I/SN is sourced from the original manufacturer or authorized distributors?
All 24AA08HT-I/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 24AA08HT-I/SN meets industry standards.
7.What is the process for return or replacement of 24AA08HT-I/SN?
All 24AA08HT-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24AA08HT-I/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 24AA08HT-I/SN part is unused and in its original packaging.
Return procedure for 24AA08HT-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24AA08HT-I/SN 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…
