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Microchip Technology AT24C16C-SSHM-B
- Part No.:
- AT24C16C-SSHM-B
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C16C-SSHM-B.pdf
- Description:
- IC EEPROM 16KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,674
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Product details
Overview
AT24C16C-SSHM-B from Microchip Technology is a 16-Kbit I²C-compatible serial EEPROM organized as 2,048 × 8 bits, operating from 1.7V to 5.5V across -40°C to +85°C industrial temperature range. It supports 100 kHz standard mode, 400 kHz fast mode, and 1 MHz fast mode plus (FM+) I²C communication, features hardware write protection via WP pin, and delivers ultra-low standby current (6 μA max) for battery-backed data logging and configuration storage in embedded controllers.
For engineers reviewing the AT24C16C-SSHM-B datasheet, AT24C16C-SSHM-B pinout, AT24C16C-SSHM-B application, or AT24C16C-SSHM-B equivalent, key selection considerations include its 8-pin SOIC package with verified SDA/SCL/VPD/WP/GND/VCC pin mapping, 16-byte page write capability, 5 ms max self-timed write cycle, 1M endurance, and 100-year data retention - all critical for firmware parameter storage, calibration data retention, and secure boot configuration in space-constrained industrial systems.
Technical Context
The AT24C16C-SSHM-B implements a true I²C slave interface with open-drain SDA and input SCL, incorporating Schmitt triggers and noise-filtered inputs for robust bus operation in electrically noisy environments. Its internal architecture includes an address register and counter, high-voltage generation circuit for EEPROM programming, and dedicated write-protection control logic tied to the WP pin state.
Memory is organized into 128 pages of 16 bytes each, supporting both byte and page write operations with automatic address incrementing within a page boundary. The device uses a Power-on Reset (POR) circuit with VPOR = 1.5 V and requires ≥100 µs tPUP delay after VCC stabilization before accepting commands - ensuring reliable initialization in low-power microcontroller systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2,048 × 8), enabling storage of 2 KB of nonvolatile configuration or calibration data |
| Supply Voltage | 1.7V to 5.5V - interoperable with 1.8V, 3.3V, and 5V logic domains without level shifting |
| I²C Speed Modes | 100 kHz (1.7–5.5V), 400 kHz (1.7–5.5V), 1 MHz FM+ (2.5–5.5V) - scalable timing for host controller bandwidth matching |
| Write Endurance | 1,000,000 cycles - supports frequent recalibration or runtime parameter updates over product lifetime |
| Data Retention | 100 years at 55°C - ensures long-term reliability for unattended industrial deployments |
| Standby Current | 6 μA max at 5.5V - minimizes quiescent power draw in always-on sensor nodes and IoT edge devices |
| Write Cycle Time | 5 ms maximum - enables deterministic firmware update latency and predictable system response during save operations |
| ESD Protection | >4,000V HBM - provides robust handling margin during board assembly and field service |
Pinout & Package
AT24C16C-SSHM-B is supplied in an 8-lead SOIC package (SOIC-8, 150 mil width) with industry-standard pinout and RoHS-compliant green finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No-connect - left unconnected per Microchip's validated SOIC-8 footprint; no internal function |
| 2 | NC | No-connect - unused pad; no routing required on PCB |
| 3 | NC | No-connect - electrically isolated; no signal or power assignment |
| 4 | GND | Ground reference - must be connected to system ground plane for stable I²C signaling and ESD path |
| 5 | SDA | Serial Data - bidirectional open-drain I²C data line requiring external 1.3–10 kΩ pull-up resistor |
| 6 | SCL | Serial Clock - input-only I²C clock line, also requiring external pull-up for proper bus timing |
| 7 | WP | Write-Protect - active-high hardware lock disabling all writes when pulled to VCC; internally pulled down if floating |
| 8 | VCC | Power Supply - supplies core logic and EEPROM array; must ramp monotonically at ≤0.1 V/µs during power-up |
Key Features
| Feature | Design Value |
|---|---|
| 16-byte page write mode | Enables efficient bulk configuration saves with single I²C transaction, reducing bus overhead by up to 94% vs. byte-by-byte writes |
| Schmitt-triggered, filtered inputs | Rejects >100 ns noise spikes on SCL/SDA, eliminating false start/stop detection in motor-drive or switching-power environments |
| Hardware write protection (WP) | Prevents accidental firmware corruption during power brownouts or software faults without requiring MCU intervention |
| Ultra-low 6 μA standby current | Extends battery life in coin-cell-powered devices beyond 10 years when paired with low-power microcontrollers |
| 100-year data retention at 55°C | Guarantees calibration constants remain valid across full product lifecycle in sealed industrial enclosures |
| Green RoHS-compliant packaging | Meets IPC-J-STD-609A halide-free requirements and eliminates lead contamination risk in automated assembly lines |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data Retention |
|---|---|
Use Scenario: Storing I/O mapping tables, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via I²C during cold start and runtime reconfiguration; WP pin hardwired to VCC during normal operation. Use Value: Eliminates need for external backup batteries or supercapacitors while maintaining 100-year data integrity under continuous 60°C ambient exposure. | Use Scenario: Preserving sensor offset/gain coefficients and patient-specific therapy settings in portable infusion pumps and diagnostic handhelds. IC Role / Device Role / Timing Role: Secure parameter vault with hardware write-lock activated during therapy delivery; accessed only during calibration or service mode. Use Value: Prevents unauthorized or accidental modification of safety-critical calibration data, satisfying IEC 62304 Class B software requirements. |
| Automotive Body Control Module (BCM) | Smart Energy Meter Firmware Parameters |
Use Scenario: Holding door lock actuation counts, window position memory, and lighting profiles in automotive BCMs operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Low-voltage EEPROM interfaced directly to 3.3V microcontroller I²C port; WP pin tied to MCU GPIO for dynamic protection control. Use Value: Enables AEC-Q200-compliant operation without level shifters, reducing BOM cost and PCB area while meeting 1M-cycle endurance for 15-year vehicle lifespan. | Use Scenario: Storing tariff schedules, metering calibration offsets, and tamper-event logs in ANSI C12.20-certified smart electricity meters. IC Role / Device Role / Timing Role: Tamper-resistant configuration store with WP pin permanently grounded during field deployment to prevent utility-side reprogramming. Use Value: Provides auditable, nonvolatile parameter history with 100-year retention - critical for revenue-grade meter certification and regulatory compliance audits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics M24C16-WMN6TP | Same 16-Kbit capacity, 1.7–5.5V supply, and SOIC-8 package; supports only up to 400 kHz I²C (no FM+ mode) | Lacks 1 MHz FM+ support - unsuitable for high-throughput parameter streaming in real-time control loops | Select when FM+ speed is unnecessary and ST's qualification pedigree (AEC-Q100 Grade 2) is required for automotive body electronics |
| ON Semiconductor CAT24C16WI-GT3 | Identical pinout and electrical specs; rated for extended temperature (-40°C to +125°C) but with 10-year data retention (vs. 100 years) | Higher temp rating enables under-hood use, but reduced retention limits suitability for long-life infrastructure meters | Choose for under-hood engine control modules where extended temperature range outweighs retention requirement |
Compared with M24C16-WMN6TP and CAT24C16WI-GT3, AT24C16C-SSHM-B uniquely combines 1 MHz FM+ I²C speed, 100-year data retention, and industrial-grade reliability in a single SOIC-8 package - making it optimal for high-integrity, long-lifecycle applications where both throughput and archival stability are mandatory.
Availability
AT24C16C-SSHM-B is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics equipment, automotive body control modules, smart energy meters, and battery-powered IoT sensors requiring stable component supply with guaranteed long-term availability.
Supply support for AT24C16C-SSHM-B 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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with ISO 9001-certified manufacturing and global distribution.
The AT24C16C-SSHM-B belongs to Microchip's AT24Cxx family of I²C serial EEPROMs, designed specifically for low-power, high-reliability data storage in space-constrained embedded systems across industrial, medical, and automotive markets.
FAQ
What is the maximum I²C clock frequency supported by AT24C16C-SSHM-B?
The AT24C16C-SSHM-B supports three I²C speed modes: 100 kHz standard mode (1.7–5.5V), 400 kHz fast mode (1.7–5.5V), and 1 MHz fast mode plus (FM+) at 2.5–5.5V. This allows designers to select optimal throughput based on host controller capability and voltage rail constraints - the 1 MHz FM+ mode enables faster parameter loading in time-sensitive applications like real-time calibration updates. AT24C16C-SSHM-B's AC characteristics are fully characterized per Table 4-3 in DS20006051A.
Does AT24C16C-SSHM-B require external pull-up resistors on SDA and SCL lines?
Yes, AT24C16C-SSHM-B requires external pull-up resistors on both SDA and SCL lines because its SDA pin is open-drain and SCL is an input-only pin. Microchip specifies maximum pull-up values of 1.3 kΩ for 1 MHz FM+, 4 kΩ for 400 kHz, and 10 kΩ for 100 kHz operation. The AT24C16C-SSHM-B datasheet (DS20006051A, Section 2.2–2.3) confirms that SDA must be pulled high externally and that SCL may be driven or pulled high - failure to implement appropriate pull-ups will result in bus communication failure.
How does the Write-Protect (WP) pin function on AT24C16C-SSHM-B?
The WP pin on AT24C16C-SSHM-B is an active-high hardware lock: when pulled to VCC, it disables all write operations to the entire memory array; when grounded, normal writes are permitted. If left floating, AT24C16C-SSHM-B internally pulls WP down to GND, but Microchip recommends explicit connection due to capacitive coupling risks. The AT24C16C-SSHM-B datasheet (Section 2.4 and Table 2-2) states this feature provides deterministic, power-fail-safe protection independent of firmware state.
What is the guaranteed data retention period for AT24C16C-SSHM-B?
AT24C16C-SSHM-B guarantees 100 years of data retention at 55°C, as specified in Table 4-6 of the official Microchip datasheet DS20006051A. This value is derived from accelerated life testing and qualification per JEDEC standards and applies to data stored in the EEPROM array under specified operating conditions. The AT24C16C-SSHM-B's 100-year retention exceeds typical industry requirements for infrastructure and medical devices, ensuring calibration data remains intact across full product lifecycles.
Can AT24C16C-SSHM-B operate reliably at 1.7V supply voltage?
Yes, AT24C16C-SSHM-B is fully specified for operation at 1.7V, including 100 kHz I²C communication, read/write functionality, and 6 μA max standby current - all verified across the full industrial temperature range (-40°C to +85°C). The AT24C16C-SSHM-B's DC and AC characteristics tables (Sections 4.2–4.4 in DS20006051A) explicitly list 1.7V as the minimum VCC, enabling direct interface with 1.8V microcontrollers and ultra-low-power battery systems without voltage translation.
AT24C16C-SSHM-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 16Kbit
- Memory Organization:
- 2K 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)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C16C-SSHM-B FAQ
1.How can I place an order for AT24C16C-SSHM-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C16C-SSHM-B 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 AT24C16C-SSHM-B reliable?
The price and inventory of AT24C16C-SSHM-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C16C-SSHM-B is usually 5 days.
3.What payment methods are accepted for AT24C16C-SSHM-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C16C-SSHM-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C16C-SSHM-B?
AT24C16C-SSHM-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C16C-SSHM-B 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 AT24C16C-SSHM-B?
For technical support, including AT24C16C-SSHM-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C16C-SSHM-B requirements.
6.How does Aetrix verify that AT24C16C-SSHM-B is sourced from the original manufacturer or authorized distributors?
All AT24C16C-SSHM-B 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 AT24C16C-SSHM-B meets industry standards.
7.What is the process for return or replacement of AT24C16C-SSHM-B?
All AT24C16C-SSHM-B units undergo pre-shipment inspection (PSI). If there is an issue with AT24C16C-SSHM-B, 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 AT24C16C-SSHM-B part is unused and in its original packaging.
Return procedure for AT24C16C-SSHM-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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