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AT24C128C-SSHM-T
Microchip Technology
IC EEPROM 128KBIT I2C 1MHZ 8SOIC
200312 Pcs New Original In Stock
EEPROM Memory IC 128Kbit I2C 1 MHz 550 ns 8-SOIC
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5.0 / 5.0
- (455 Ratings)
AT24C128C-SSHM-T
Product Overview
1255172
DiGi Electronics Part Number
AT24C128C-SSHM-T-DGManufacturer
Microchip Technology
AT24C128C-SSHM-T
Description
IC EEPROM 128KBIT I2C 1MHZ 8SOICInventory
200312 Pcs New Original In Stock
EEPROM Memory IC 128Kbit I2C 1 MHz 550 ns 8-SOIC
CAD Models - PCB Symbols & Footprints
Quantity
Minimum 1
Minimum 1
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AT24C128C-SSHM-T Technical Specifications
Category
Memory, Memory
Packaging
Cut Tape (CT) & Digi-Reel®
Series
-
Product Status
Active
DiGi-Electronics Programmable
Verified
Memory Type
Non-Volatile
Memory Format
EEPROM
Technology
EEPROM
Memory Size
128Kbit
Memory Organization
16K x 8
Memory Interface
I2C
Clock Frequency
1 MHz
Write Cycle Time - Word, Page
5ms
Access Time
550 ns
Voltage - Supply
1.7V ~ 5.5V
Operating Temperature
-40°C ~ 85°C (TA)
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Supplier Device Package
8-SOIC
Base Product Number
AT24C128C
Datasheet & Documents
HTML Datasheet
AT24C128C-SSHM-T-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.32.0051
Additional Information
Other Names
AT24C128C-SSHM-TCT-DG
150-AT24C128C-SSHM-TCT
150-AT24C128C-SSHM-TDKR
150-AT24C128C-SSHM-TTR
AT24C128C-SSHM-T-899DKR-DG
AT24C128C-SSHM-T-DKR-DG
AT24C128C-SSHM-TDKR-DG
AT24C128CSSHMT
AT24C128C-SSHM-T-899
AT24C128C-SSHM-T SL901CT-DG
AT24C128C-SSHM-TTR-DG
AT24C128C-SSHM-T SL901
AT24C128C-SSHM-T SL901DKR-DG
AT24C128C-SSHM-T SL901TR
AT24C128C-SSHM-T-899-DG
AT24C128C-SSHM-TDKR
AT24C128C-SSHM-T-DKR
AT24C128C-SSHM-TCT
AT24C128C-SSHM-T-899TR-DG
AT24C128C-SSHM-T SL901TR-DG
AT24C128C-SSHM-T-DG
AT24C128C-SSHM-TTR
AT24C128C-SSHM-T-899CT-DG
AT24C128C-SSHM-T SL901DKR
AT24C128C-SSHM-T SL901CT
Standard Package
4,000
Alternative Parts
PART NUMBER
MANUFACTURER
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SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
Die schnelle Lieferung hat meine Erwartungen übertroffen, und der Support war wirklich hilfreich.
de desembre 02, 2025
Their response to any product-related questions is always timely and helpful.
de desembre 02, 2025
Customer service was exceptional, helping me troubleshoot an issue in a calm and professional manner.
de desembre 02, 2025
Support after purchase was detailed and easy to access, enhancing my overall experience.
de desembre 02, 2025
Every product I've received has been of outstanding quality.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when using the AT24C128C-SSHM-T in a wide-voltage industrial system operating from 3.3V to 5V?
When designing in the AT24C128C-SSHM-T for systems that switch between 3.3V and 5V logic levels, ensure all connected I2C bus components are 5V-tolerant if operating at VDD = 5.5V, as the AT24C128C-SSHM-T input pins are not 5V-tolerant above 5.5V. Additionally, verify pull-up resistor values on SDA and SCL lines are recalculated for each supply level to maintain proper I2C signal integrity (rise time < 300 ns at 1 MHz). Use level shifters like the TXS0108E if interfacing with 3.3V-only microcontrollers in a 5V system to prevent damage and bus contention. Avoid floating inputs and ensure VDD ramp rate meets the minimum 0.1V/ms specified to prevent unintended write operations during power-up.
How does the write cycle timing of the AT24C128C-SSHM-T impact real-time data logging reliability in battery-powered applications?
The AT24C128C-SSHM-T has a maximum 5ms word/page write cycle time, which must be accounted for in battery-powered data logging systems to avoid data loss. During this internal write period, the device does not respond to bus traffic, so the host MCU must either poll the ACK or implement a timeout delay before subsequent I2C commands. In power-constrained designs, abrupt power loss during a write cycle can corrupt data. To mitigate this, use a supercapacitor or small backup battery to support VDD long enough to complete the write, or implement firmware write buffering with wear-leveling algorithms to reduce write frequency. Never assume immediate write completion after sending data.
Can the AT24C128C-SSHM-T reliably replace the CAT24C128WI-GT3 in high-noise automotive environments, and what are the critical differences?
The AT24C128C-SSHM-T can replace the CAT24C128WI-GT3 in most automotive applications, but attention must be paid to noise immunity and supply stability. The AT24C128C-SSHM-T offers better AC noise suppression and tighter VDD tolerance (1.7V start-up), making it more reliable in cold-crank scenarios compared to the CAT24C128. However, ensure PCB layout includes 100nF ceramic decoupling close to VDD pin and keep SDA/SCL traces short and away from high-current paths. The CAT24C128 has slightly faster addressing, but AT24C128C-SSHM-T’s 1MHz I2C and 550ns access time are sufficient for most event-triggered logging. Validate I2C communication with pull-ups as low as 1.8kΩ in noisy environments to maintain signal rise time margins.
What are the implications of using the AT24C128C-SSHM-T at its maximum 1MHz I2C speed with long cable runs in a factory automation setup?
Operating the AT24C128C-SSHM-T at 1MHz I2C over long cables (>30cm) increases risk of signal distortion and arbitration loss due to bus capacitance exceeding the 400pF I2C limit. At 1MHz, rise and fall times must be <120ns, which standard 4.7kΩ pull-ups cannot support over cable runs. Use active I2C buffers like the PCA9515B or reduce speed to 400kHz for runs >50cm. If high speed is critical, implement 1–2kΩ pull-ups with series termination resistors and shielded twisted-pair cables. Also, confirm that the host microcontroller has sufficiently fast GPIO drive strength to meet timing; otherwise, data corruption may occur undetected. Test under real load and temperature conditions before deployment.
How does the endurance and data retention of the AT24C128C-SSHM-T affect long-term field reliability in medical sensor calibration storage?
The AT24C128C-SSHM-T is rated for 1 million write/erase cycles and 200-year data retention at 25°C, but field reliability in medical sensors depends on usage patterns. Frequent calibration updates can exhaust endurance prematurely—e.g., 100 calibrations/day would use ~3.6% of cycle life per year. Implement wear leveling across memory pages to distribute writes. Also, note that data retention degrades at elevated temperatures: at 85°C, retention drops to ~20 years. For life-critical medical devices, log write counts and perform periodic EEPROM health checks. Avoid continuous polling during writes and ensure stable VDD to prevent bit corruption. Consider redundant storage in separate memory blocks for fail-safe recovery.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
AT24C128C-SSHM-T CAD Models
Microchip Technology AT24C128C-SSHM-T PCB symbols & footprints
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