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Microchip Technology 47C16T-I/ST
- Part No.:
- 47C16T-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
47C16T-I/ST.pdf
- Description:
- IC EERAM 16KBIT I2C 1MHZ 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,955
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Product details
Overview
47C16T-I/ST from Microchip Technology is a 16 Kbit (2,048 × 8) I²C serial EERAM combining volatile SRAM with nonvolatile EEPROM backup. It operates at 4.5V–5.5V, supports up to 1 MHz I²C, and delivers automatic power-loss data retention via VCAP capacitor-assisted store/recall. Used in industrial control modules where persistent memory state must survive brownouts without external controllers.
For engineers reviewing the 47C16T-I/ST datasheet, 47C16T-I/ST pinout, 47C16T-I/ST application, or 47C16T-I/ST equivalent, key selection criteria include guaranteed 25 ms max store time, hardware store pin (HS), software write protection granularity down to 1/64 of array, Auto-Store Enable (ASE) bit control, and AEC-Q100-qualified operation across –40°C to +85°C.
Technical Context
The 47C16T-I/ST implements a dual-memory architecture: a 2,048 × 8-bit SRAM array for high-speed read/write access and an EEPROM array for nonvolatile backup. Store and recall operations are triggered either automatically on VCC fall below VTRIP (4.0–4.4 V), manually via HS pin pulse ≥150 ns, or through software commands written to the COMMAND register (0x55).
Its I²C interface complies with standard 100 kHz/400 kHz/1 MHz timing, features Schmitt-trigger inputs on SDA/SCL/HS for noise immunity, and supports cascading up to four devices via A1/A2 address pins. The STATUS register (0x00) provides real-time AM (Array Modified), ASE (Auto-Store Enable), BP (Block Protect), and EVENT bits - all nonvolatile except AM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Density | 16 Kbit (2,048 × 8-bit organization) - defines maximum user-accessible SRAM capacity before EEPROM backup is required |
| VCC Range | 4.5 V to 5.5 V - compatible with standard 5 V logic systems and industrial power rails |
| Max I²C Clock | 1 MHz - enables fast configuration and data transfer in time-critical embedded hosts |
| Store Time | ≤25 ms (max) - ensures full SRAM-to-EEPROM transfer completes before VCC drops below POR threshold |
| Data Retention | >200 years (EEPROM) - guarantees long-term data integrity without refresh cycles |
| Endurance | 1 million store cycles - supports frequent power-cycle logging in metering or telemetry applications |
| Temp Range | –40°C to +85°C (Industrial grade) - validated for deployment in factory automation and motor control environments |
Pinout & Package
47C16T-I/ST is housed in an 8-lead TSSOP package (3.0 mm × 4.4 mm, 0.65 mm pitch), optimized for space-constrained PCB layouts while maintaining thermal and signal integrity in industrial ambient conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCAP | Auto-store capacitor connection | Accepts 5–6.8 µF external capacitor to sustain internal charge during VCC collapse; mandatory for reliable auto-store |
| A1, A2 | I²C device address inputs | Set two LSBs of 7-bit slave address (base 0xA0); enable up to four devices on same bus |
| VSS | Ground reference | Return path for all internal circuits; requires low-impedance connection to system GND plane |
| VCC | Power supply input | 4.5–5.5 V DC supply; must meet TVRISE/TvFALL slew rate specs (≥70 µs/V) to avoid POR misbehavior |
| HS | Hardware store trigger | Active-high pulse ≥150 ns initiates immediate SRAM→EEPROM store; ignored if VCAP < VTRIP |
| SCL | I²C clock input | Drives internal timing for all read/write/store/recall operations; Schmitt-triggered for noise rejection |
| SDA | I²C bidirectional data line | Open-drain interface requiring external pull-up; supports zero-cycle-delay reads/writes per I²C spec |
Key Features
| Feature | Design Value |
|---|---|
| SRAM + EEPROM integration | Eliminates need for separate RAM and EEPROM ICs, reducing BOM count and layout complexity in PLC I/O modules |
| Automatic store/recall | Zero-software-intervention data preservation on power loss - critical for energy meter firmware state recovery |
| Hardware store pin (HS) | Enables deterministic, sub-millisecond initiation of store operation independent of host MCU readiness or firmware state |
| Software write protection | Configurable block protection (1/64 to full array) prevents accidental overwrites of calibration or configuration data in field-deployed units |
| Nonvolatile event flag | EVENT bit in STATUS register latches external HS pin transitions - useful for tamper detection or maintenance logging |
Applications
| Energy Metering | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Storing tariff schedules, accumulated kWh readings, and firmware update flags across repeated mains interruptions. IC Role / Device Role / Timing Role: Nonvolatile SRAM buffer that retains real-time energy data during brownouts and restores it on power-up. Use Value: Prevents data loss during grid instability; eliminates need for battery-backed RAM or complex host-side backup logic. |
Use Scenario: Preserving I/O configuration, diagnostic logs, and calibration offsets in modular controller backplanes. IC Role / Device Role / Timing Role: Dual-port memory serving as configuration scratchpad and persistent state keeper for hot-swappable I/O cards. Use Value: Enables plug-and-play replacement without reprogramming; maintains operational continuity after unexpected power loss. |
| Automotive Body Control Units | Medical Infusion Pumps |
Use Scenario: Recording door lock status, window position, mirror settings, and fault codes across ignition cycles. IC Role / Device Role / Timing Role: AEC-Q100-qualified EERAM providing automotive-grade data persistence with no external supervision. Use Value: Meets ISO 16750-2 transient immunity requirements; supports fail-safe recall within 5 ms of power restoration. |
Use Scenario: Safeguarding drug dosage history, alarm thresholds, and pump calibration parameters between power cycles. IC Role / Device Role / Timing Role: Safety-critical nonvolatile memory ensuring treatment continuity and regulatory audit trail integrity. Use Value: Guarantees >200-year data retention for FDA-required logs; supports manual store via HS pin during emergency shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EERAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 47L16T-I/ST | 2.7–3.6 V VCC range; lower VTRIP (2.4–2.6 V); identical density, timing, and pinout | Targeted at 3.3 V systems (e.g., ARM Cortex-M based controllers); not suitable for 5 V rail environments | Select when main supply is 3.3 V and industrial temp range suffices; verify VCAP sizing per DS20005371E Table 1-1 D18 |
| FM24CL16-G | 16 Kbit F-RAM (not EERAM); unlimited endurance; no store time delay; 2.7–3.6 V only; different I²C address map | Eliminates store latency and wear-out concerns but lacks hardware store pin and auto-store capability | Prefer for high-write-frequency logging; avoid if deterministic power-loss store timing or HS-triggered store is required |
Compared with 47C16T-I/ST, the 47L16T-I/ST offers voltage compatibility with 3.3 V systems but sacrifices 5 V operation, while the FM24CL16-G replaces EEPROM-based backup with ferroelectric RAM-removing store delays and endurance limits but also removing hardware-initiated store and auto-store functionality.
Availability
47C16T-I/ST is available at Aetrix Electronics and suitable for industrial control systems, energy metering platforms, and automotive body electronics requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for 47C16T-I/ST 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 microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing infrastructure.
The 47C16T-I/ST belongs to Microchip's EERAM product line, engineered specifically for applications demanding seamless, low-overhead nonvolatile data retention without batteries or external controllers - targeting industrial, automotive, and medical equipment designers.
FAQ
What is the function of the VCAP pin on the 47C16T-I/ST?
The VCAP pin on the 47C16T-I/ST connects to an external 5–6.8 µF capacitor that supplies hold-up energy during VCC collapse. This enables automatic SRAM-to-EEPROM store when VCC falls below the trip voltage (4.0–4.4 V). If VCAP is unconnected, the pin must be tied to VCC and Auto-Store disabled via the ASE bit to prevent EEPROM corruption - a requirement explicitly stated in DS20005371E page 4, Note 3.
How does the Hardware Store (HS) pin operate on the 47C16T-I/ST?
The HS pin on the 47C16T-I/ST triggers an immediate SRAM-to-EEPROM store upon receiving a high-going pulse ≥150 ns (DS20005371E, Table 1-2, Param #14). It is ignored during Auto-Store or Recall operations and when VCAP voltage falls below VTRIP. The associated EVENT bit in the STATUS register is set upon HS activation, providing firmware-visible confirmation of the store request.
Can the 47C16T-I/ST be used in a 3.3 V system?
No - the 47C16T-I/ST is specified only for 4.5 V to 5.5 V operation (DS20005371E, Device Selection Table). For 3.3 V systems, Microchip offers the pin-compatible 47L16T-I/ST variant, which uses a 2.7–3.6 V supply and lower VTRIP (2.4–2.6 V). Substituting 47C16T-I/ST in a 3.3 V design violates absolute maximum ratings and will result in functional failure or data corruption.
What is the maximum I²C clock frequency supported by the 47C16T-I/ST?
The 47C16T-I/ST supports I²C clock frequencies up to 1 MHz under industrial temperature conditions (DS20005371E, Table 1-2, Param #1). This allows high-throughput configuration and data transfer in host systems with capable I²C peripherals, while maintaining full compliance with standard-mode and fast-mode-plus timing requirements including THIGH/TLOW ≥500 ns.
How is write protection configured on the 47C16T-I/ST?
Write protection on the 47C16T-I/ST is controlled by BP2:BP0 bits in the STATUS register (0x00), enabling protection of address ranges from 1/64 to the full 2,048-byte SRAM array (DS20005371E, Table 2-5). Protection is nonvolatile and persists across power cycles. Attempts to write to protected regions result in NACK after the data byte, halting the operation without incrementing the address pointer.
47C16T-I/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EERAM
- Technology:
- EEPROM, SRAM
- Memory Size:
- 16Kbit
- Memory Organization:
- 2K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 1ms
- Access Time:
- 400 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
47C16T-I/ST FAQ
1.How can I place an order for 47C16T-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 47C16T-I/ST 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 47C16T-I/ST reliable?
The price and inventory of 47C16T-I/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 47C16T-I/ST is usually 5 days.
3.What payment methods are accepted for 47C16T-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 47C16T-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 47C16T-I/ST?
47C16T-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 47C16T-I/ST 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 47C16T-I/ST?
For technical support, including 47C16T-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 47C16T-I/ST requirements.
6.How does Aetrix verify that 47C16T-I/ST is sourced from the original manufacturer or authorized distributors?
All 47C16T-I/ST 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 47C16T-I/ST meets industry standards.
7.What is the process for return or replacement of 47C16T-I/ST?
All 47C16T-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 47C16T-I/ST, 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 47C16T-I/ST part is unused and in its original packaging.
Return procedure for 47C16T-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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