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Microchip Technology AT24CS16-SSHM-T
- Part No.:
- AT24CS16-SSHM-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24CS16-SSHM-T.pdf
- Description:
- IC EEPROM 16KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,970
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Product details
Overview
AT24CS16-SSHM-T from Microchip Technology is a 16-Kbit I²C-compatible serial EEPROM with factory-programmed 128-bit unique serial number, organized as 2,048 × 8 bits, operating from 1.7V to 5.5V, and rated for -40°C to +85°C industrial temperature range. It supports Standard (100 kHz), Fast (400 kHz), and Fast Mode Plus (1 MHz) I²C speeds and includes hardware write protection via WP pin.
For engineers reviewing the AT24CS16-SSHM-T datasheet, AT24CS16-SSHM-T pinout, AT24CS16-SSHM-T application, or AT24CS16-SSHM-T equivalent, key selection considerations include its guaranteed-unique serial number location (non-volatile, non-overlapping with user memory), ultra-low standby current (≤6 µA), page-write capability (16-byte pages), 1,000,000 write endurance, and 100-year data retention - all in an 8-lead SOIC package.
Technical Context
The AT24CS16-SSHM-T implements a two-wire I²C slave interface with Schmitt-triggered, noise-filtered SDA and SCL inputs, supporting bidirectional data transfer with ACK/NACK protocol and start/stop condition detection. Its internal architecture integrates a high-voltage generation circuit for EEPROM programming, a dedicated 128-bit serial number block permanently locked during wafer fabrication, and independent write-protection logic tied to the WP pin state.
Memory is organized into 128 pages of 16 bytes each, enabling partial-page writes without erasing adjacent bytes. The device uses Power-on Reset (POR) to prevent spurious writes during power-up and supports software reset via SCL clocking when bus lockup occurs - both critical for robust embedded system integration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 16 Kbit (2,048 × 8), fully addressable without block erase |
| I²C speed modes | 100 kHz (1.7–5.5 V), 400 kHz (1.7–5.5 V), 1 MHz FM+ (2.5–5.5 V) |
| Supply voltage | 1.7 V to 5.5 V - enables direct interfacing with 1.8 V, 3.3 V, and 5 V microcontrollers |
| Standby current | ≤6 µA at 5.5 V - minimizes battery drain in always-on IoT nodes |
| Write endurance | 1,000,000 cycles - supports frequent calibration or logging in industrial sensors |
| Data retention | 100 years at 55°C - ensures long-term firmware or configuration integrity |
| Serial number | 128-bit factory-programmed, read-only, globally unique across CS Series |
| ESD protection | >4,000 V HBM - enhances reliability in handling-sensitive manufacturing environments |
Pinout & Package
AT24CS16-SSHM-T is supplied in an 8-lead SOIC package (3.9 mm × 4.9 mm, 1.27 mm pitch) with standard JEDEC MS-012AC footprint. Pin 1 is top-left corner, marked by dot or bevel.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Internally unconnected; must remain floating or tied to GND per layout best practice |
| 2 (NC) | No Connect | Internally unconnected; no electrical function; avoid routing signals to this pad |
| 3 (NC) | No Connect | Internally unconnected; unused in SOIC variant; not bonded |
| 4 (GND) | Ground reference | System return path for VCC and I/O; requires low-impedance connection to PCB ground plane |
| 5 (SDA) | Serial Data I/O | Open-drain bidirectional line; requires external pull-up resistor ≤10 kΩ to VCC |
| 6 (SCL) | Serial Clock input | CMOS input; must be pulled high externally; timing-critical for I²C compliance |
| 7 (WP) | Hardware write protect | Active-high; ties full array read-only when driven to VCC; internally pulled down if floating |
| 8 (VCC) | Power supply | 1.7–5.5 V operation; decoupling capacitor (0.1 µF) required within 5 mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed 128-bit serial number | Guaranteed unique across entire Microchip CS Series EEPROM family; occupies dedicated read-only memory space outside user array |
| 16-byte page write mode | Enables efficient partial updates without erasing full pages; reduces write latency vs. byte-by-byte writes |
| Schmitt-triggered, filtered I/O | Rejects noise spikes up to 100 ns (Fast Mode) or 50 ns (FM+); eliminates false start/stop detection in noisy industrial environments |
| Self-timed write cycle | Max 5 ms duration; no external polling delay needed beyond tWR; simplifies firmware timing logic |
| Green packaging | Lead-free, halide-free, RoHS-compliant SOIC; meets IPC/JEDEC J-STD-020 moisture sensitivity level 3 |
Applications
| Asset Tracking Tag | Industrial Sensor Node |
|---|---|
Use Scenario: Embedded in RFID-adjacent asset tags for field-deployed equipment requiring tamper-proof identity. IC Role / Device Role / Timing Role: Non-volatile identity storage; provides immutable 128-bit serial number readable over I²C during boot or commissioning. Use Value: Eliminates need for external serialization during manufacturing; enables zero-touch provisioning using factory-assigned IDs. | Use Scenario: Mounted on temperature/humidity sensor PCBs in HVAC control panels operating at -40°C to +85°C. IC Role / Device Role / Timing Role: Configuration storage for calibration coefficients and device-specific thresholds; retains values across power cycles. Use Value: Supports 1M write cycles for field recalibration; 100-year retention ensures lifetime validity without replacement. |
| Smart Meter Firmware Vault | Medical Diagnostic Module |
Use Scenario: Securing firmware version stamps and cryptographic keys in utility smart meters with long field lifetimes. IC Role / Device Role / Timing Role: Secure parameter storage with hardware write protection (WP pin tied to VCC) preventing accidental overwrite. Use Value: Full-array hardware lock prevents corruption during brown-out events or firmware update failures. | Use Scenario: Storing FDA-mandated device serial numbers and calibration logs in portable diagnostic tools. IC Role / Device Role / Timing Role: Regulatory-compliant identity and audit trail storage; serial number used for UDI (Unique Device Identification). Use Value: Factory-programmed 128-bit ID satisfies ISO/IEC 15459-3 uniqueness requirements without host-side management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C16D-SSHM-T | No factory-programmed serial number; identical 16-Kbit capacity, SOIC-8, and I²C timing specs | Lacks guaranteed-unique ID; suitable where serialization is handled externally or not required | Select when cost sensitivity outweighs need for embedded identity; same footprint and code compatibility |
| M24C16-RMN6TP | STMicroelectronics part; 16-Kbit, SOIC-8, 1.7–5.5 V, but no factory serial number and only 400 kHz max I²C speed | Lower-speed interface; lacks FM+ support and unique ID; different write-cycle timing (10 ms max) | Choose for legacy ST-based designs; verify timing margins for fast-mode systems before substitution |
Compared with AT24CS16-SSHM-T, AT24C16D-SSHM-T offers identical memory and package but omits the 128-bit serial number, while M24C16-RMN6TP trades FM+ speed and factory ID for ST's qualification pedigree - making AT24CS16-SSHM-T the only option delivering guaranteed uniqueness, 1 MHz I²C, and 5 ms write cycles in SOIC-8.
Availability
AT24CS16-SSHM-T is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter firmware vaults, and medical diagnostic modules requiring stable component supply, long-term data retention, and factory-assigned device identity.
Supply support for AT24CS16-SSHM-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 Inc. is a leading provider of microcontroller, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The AT24CS16-SSHM-T belongs to Microchip's CS Series Serial EEPROM product line, designed specifically to eliminate manufacturing-line serialization overhead by embedding guaranteed-unique identifiers directly into memory silicon - targeting IoT edge devices, industrial automation, and regulated medical equipment.
FAQ
What is the factory-programmed serial number location and access method for AT24CS16-SSHM-T?
The AT24CS16-SSHM-T contains a dedicated 128-bit read-only memory block programmed during wafer fabrication. It is accessed using I²C device address '1011b' (0xB0–0xB7) instead of the standard EEPROM address '1010b', with fixed word address '10xxxxxx'. This location is physically separate from the 16-Kbit user array and cannot be overwritten. The AT24CS16-SSHM-T datasheet (DS20006342A, Section 6.1 and 8.4) defines exact addressing and timing.
Does AT24CS16-SSHM-T support 1 MHz I²C communication across its full voltage range?
No - AT24CS16-SSHM-T supports 1 MHz Fast Mode Plus (FM+) only at VCC = 2.5 V to 5.5 V. At 1.7 V to 2.5 V, maximum speed is 400 kHz. This voltage-dependent speed grading is specified in DS20006342A, Table 4-3. The AT24CS16-SSHM-T must be operated within these limits to ensure reliable ACK timing and data setup/hold compliance.
How does the WP pin function on AT24CS16-SSHM-T, and what happens if left unconnected?
When WP is driven high (to VCC), AT24CS16-SSHM-T disables all write operations to the entire memory array. If left floating, the pin is internally pulled down to GND, enabling normal writes - but Microchip advises against floating due to capacitive coupling risks. The AT24CS16-SSHM-T datasheet (Section 2.4) recommends tying WP to GND or VCC via ≤10 kΩ resistor for deterministic behavior.
What is the maximum write cycle time and how does it affect firmware design for AT24CS16-SSHM-T?
The AT24CS16-SSHM-T guarantees a maximum self-timed write cycle of 5 ms (DS20006342A, Table 4-3). Firmware must either poll the ACK bit after initiating a write (acknowledge polling) or insert a fixed 5 ms delay before issuing subsequent commands. This timing is independent of VCC or temperature and applies to both byte and page writes. The AT24CS16-SSHM-T does not require external write-enable signals.
Is AT24CS16-SSHM-T compatible with standard 16-Kbit I²C EEPROM software drivers?
Yes - AT24CS16-SSHM-T maintains full command, timing, and addressing compatibility with industry-standard 16-Kbit I²C EEPROMs (e.g., AT24C16). Its added 128-bit serial number uses a distinct device address prefix (0xBx), so existing drivers continue working unchanged for user memory access. The AT24CS16-SSHM-T only extends functionality; it does not break backward compatibility.
AT24CS16-SSHM-T 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:
- 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
AT24CS16-SSHM-T FAQ
1.How can I place an order for AT24CS16-SSHM-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24CS16-SSHM-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 AT24CS16-SSHM-T reliable?
The price and inventory of AT24CS16-SSHM-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24CS16-SSHM-T is usually 5 days.
3.What payment methods are accepted for AT24CS16-SSHM-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24CS16-SSHM-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24CS16-SSHM-T?
AT24CS16-SSHM-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24CS16-SSHM-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 AT24CS16-SSHM-T?
For technical support, including AT24CS16-SSHM-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24CS16-SSHM-T requirements.
6.How does Aetrix verify that AT24CS16-SSHM-T is sourced from the original manufacturer or authorized distributors?
All AT24CS16-SSHM-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 AT24CS16-SSHM-T meets industry standards.
7.What is the process for return or replacement of AT24CS16-SSHM-T?
All AT24CS16-SSHM-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24CS16-SSHM-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 AT24CS16-SSHM-T part is unused and in its original packaging.
Return procedure for AT24CS16-SSHM-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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