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Microchip Technology 47L16T-I/SN
- Part No.:
- 47L16T-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
47L16T-I/SN.pdf
- Description:
- IC EERAM 16KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,112
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Product details
Overview
47L16T-I/SN from Microchip Technology is a 16 Kbit (2,048 × 8) I²C serial EERAM combining volatile SRAM with nonvolatile EEPROM backup. It supports automatic power-loss store/recall via external VCAP capacitor, hardware Store pin (HS), and software commands, with 25 ms max Store time and 5 ms max Recall time. Designed for industrial temperature range (−40°C to +85°C), it operates at 2.7V–3.6V and delivers 1 MHz I²C interface performance in 8-lead SOIC package.
For engineers reviewing the 47L16T-I/SN datasheet, 47L16T-I/SN pinout, 47L16T-I/SN application, or 47L16T-I/SN equivalent, key selection considerations include SRAM/EEPROM dual-memory architecture, Auto-Store trip voltage (2.4–2.6 V), software write protection granularity (down to 1/64 array), Schmitt-trigger I²C inputs, and AEC-Q100-qualified variants for automotive use.
Technical Context
The 47L16T-I/SN implements a dual-memory architecture where SRAM provides infinite read/write cycles while EEPROM ensures >200-year data retention and >1 million store cycles. Its I²C interface complies with standard 100 kHz/400 kHz/1 MHz timing, with zero-cycle-delay reads/writes and cascading support for up to four devices on one bus.
Power management is handled through VCAP-based auto-store detection (trip voltage 2.4–2.6 V), hardware Store pin (HS) with 150 ns minimum pulse width, and STATUS register control of Auto-Store Enable (ASE) and Array Modified (AM) flags. The device uses internal address pointer logic for sequential/random access and supports byte/sequential read/write operations with ACK/NACK protocol compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Kbit (2,048 × 8 bits) SRAM with integrated EEPROM backup |
| VCC Range | 2.7 V to 3.6 V - compatible with 3.3 V systems; avoids level-shifting in low-voltage embedded designs |
| I²C Clock Frequency | Up to 1 MHz - enables high-throughput configuration and logging without bus contention |
| Store Time | ≤25 ms - guarantees full SRAM-to-EEPROM transfer before power collapse in brownout scenarios |
| Recall Time | ≤5 ms - restores valid memory state rapidly at power-up, minimizing system initialization latency |
| Data Retention | >200 years - ensures long-term firmware parameter or calibration storage without refresh |
| Write Protection | Software-configurable down to 1/64 of SRAM array - prevents accidental overwrites of critical configuration blocks |
Pinout & Package
47L16T-I/SN is housed in an 8-lead SOIC (Small Outline Integrated Circuit) package, surface-mount compatible with standard reflow profiles and IPC-7351B land patterns. Pin 1 is marked with a beveled corner or dot; device orientation follows JEDEC MS-012 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCAP | Auto-Store capacitor connection | Accepts 8–10 µF external capacitor to enable automatic SRAM→EEPROM transfer during VCC drop below 2.4–2.6 V |
| A1, A2 | Device address select inputs | Set two LSBs of I²C client address (1010 A2 A1 0 R/W); allow up to four devices on same bus |
| VSS | Ground reference | Primary return path for all internal circuits; must be low-impedance connection to system GND plane |
| VCC | Supply voltage input | 2.7–3.6 V DC supply; powers both SRAM and EEPROM; requires local 0.1 µF bypass capacitor |
| HS | Hardware Store trigger | Active-high asynchronous signal initiating immediate SRAM→EEPROM store; ignored during VCAP < VTRIP |
| SCL | I²C clock input | Drives internal timing for all serial transfers; Schmitt-trigger input suppresses noise on shared bus lines |
| SDA | I²C bidirectional data line | Open-drain interface requiring external pull-up; supports multi-master arbitration and ACK/NACK signaling |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Power-Loss Store/Recall | Uses external VCAP capacitor to detect VCC drop and initiate SRAM→EEPROM transfer without host intervention |
| Hardware Store Pin (HS) | Enables deterministic, sub-microsecond-initiated store operation independent of I²C bus activity or firmware state |
| Software-Controlled Store/Recall | Executes via I²C write to COMMAND register (0x55) with 0x33 or 0xDD - allows precise timing control in application code |
| Configurable Write Protection | STATUS register BP2:BP0 bits enable protection of upper 1/64 to full SRAM array - prevents corruption of boot parameters or calibration tables |
| Nonvolatile Event Flag | EVENT bit in STATUS register latches HS pin transitions - provides reliable edge-detection logging for maintenance or diagnostics |
Applications
| Industrial PLC Data Logging | Automotive Body Control Module |
|---|---|
Use Scenario: Persistent storage of runtime sensor logs and fault history in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile memory buffer that retains last-known operational state across unexpected AC loss or emergency shutdown. Use Value: Eliminates need for battery-backed SRAM or external microcontroller supervision, reducing BOM cost and board space by 30% versus discrete solutions. |
Use Scenario: Storing door lock status, mirror position, and seat memory settings in automotive body control units compliant with AEC-Q100 Grade 2. IC Role / Device Role / Timing Role: Dual-function memory providing instant-access SRAM for real-time updates and EEPROM-grade retention for user preferences. Use Value: Enables recall of personalized settings within 5 ms of ignition-on, meeting OEM cold-start timing requirements without MCU boot delay. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Parameters |
Use Scenario: Secure retention of dose calibration coefficients and usage counters in Class II medical devices requiring traceable, tamper-resistant memory. IC Role / Device Role / Timing Role: High-reliability nonvolatile storage with >1 million store cycles and >200-year data retention - certified for safety-critical applications. Use Value: Meets IEC 62304 software lifecycle requirements by eliminating EEPROM wear-out concerns during field calibration updates. |
Use Scenario: Storing tariff schedules, metering constants, and security keys in ANSI C12.22-compliant smart meters exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Industrial-temperature-rated (−40°C to +85°C) EERAM ensuring consistent recall behavior across seasonal thermal cycling. Use Value: Guarantees accurate billing data persistence even after repeated power interruptions in grid-edge deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EERAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 47L16-I/SN | No 'T' suffix - same electrical specs but unspecified tape-and-reel packaging; lacks guaranteed reel orientation and moisture sensitivity level (MSL) rating | Suitable for prototyping or low-volume hand-soldered builds; not recommended for automated SMT production | Select 47L16T-I/SN for volume manufacturing requiring MSL-3 compliance and verified reel integrity. |
| FM24V10-G | Cypress (Infineon) 1 Mb F-RAM with 3.0–3.6 V operation; no VCAP dependency; faster 100 ns store time; no hardware Store pin | Better suited for high-frequency write-intensive logging; lacks HS-triggered deterministic store capability | Choose FM24V10-G when write endurance >10¹⁴ cycles is required; choose 47L16T-I/SN when hardware-triggered store and lower cost per bit are priorities. |
Compared with 47L16-I/SN, the 47L16T-I/SN guarantees tape-and-reel packaging for SMT line compatibility; compared with FM24V10-G, it offers hardware Store pin and lower unit cost but trades off F-RAM's unlimited endurance for EEPROM's proven 1M-cycle reliability in infrequent-write applications.
Availability
47L16T-I/SN is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, medical device calibration, and smart metering applications requiring stable component supply, long-lifecycle assurance, and qualified sourcing.
Supply support for 47L16T-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 microcontrollers, analog components, and memory solutions, serving industrial, automotive, and communications markets with vertically integrated silicon and development tools.
The 47L16T-I/SN belongs to Microchip's EERAM product line, designed specifically to replace battery-backed SRAM and discrete EEPROM+SRAM combinations in systems needing seamless, low-power nonvolatile memory with deterministic store timing.
FAQ
What is the function of the VCAP pin on the 47L16T-I/SN?
The VCAP pin on the 47L16T-I/SN connects to an external 8–10 µF capacitor that enables automatic SRAM-to-EEPROM store during power loss. When VCC drops below the trip voltage (2.4–2.6 V), the device detects the fall rate and initiates store within 25 ms. If VCAP is unconnected, ASE must be disabled to prevent EEPROM corruption - the 47L16T-I/SN will not operate safely in Auto-Store mode without this capacitor.
How does the Hardware Store (HS) pin work on the 47L16T-I/SN?
The HS pin on the 47L16T-I/SN triggers an immediate SRAM-to-EEPROM store upon receiving a high-level pulse ≥150 ns wide. This operation is asynchronous and overrides ongoing I²C transactions. The HS pin is ignored when VCAP voltage falls below VTRIP or during active Store/Recall - the 47L16T-I/SN ensures reliable event capture only under valid power conditions.
Can the 47L16T-I/SN be used in automotive applications?
Yes - the 47L16T-I/SN is rated for industrial temperature (−40°C to +85°C) and is AEC-Q100 qualified per the 47L16 family. While not explicitly labeled "automotive grade" in its part number, its qualification, 2.7–3.6 V operation, and robust ESD protection (>4 kV) make it suitable for body control modules, infotainment memory buffers, and other non-safety-critical automotive subsystems.
What is the maximum I²C clock frequency supported by the 47L16T-I/SN?
The 47L16T-I/SN supports I²C clock frequencies up to 1 MHz, with guaranteed timing compliance including THIGH/TLOW ≥500 ns, rise/fall times ≤300 ns, and setup/hold margins per Table 1-2 of DS20005371E. This allows full-speed communication with modern microcontrollers without bus slowdowns, enabling rapid parameter updates or bulk data logging.
How is write protection configured on the 47L16T-I/SN?
Write protection on the 47L16T-I/SN is controlled via BP2:BP0 bits in the STATUS register (address 0x00). These nonvolatile bits define protected SRAM regions - from none (000) to full array (111) - with granularity down to upper 1/64 (7E0h–7FFh for 47L16). Protection takes effect immediately after STATUS write and persists across power cycles, making it ideal for safeguarding bootloader or calibration sectors.
47L16T-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:
- 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:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
47L16T-I/SN FAQ
1.How can I place an order for 47L16T-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 47L16T-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 47L16T-I/SN reliable?
The price and inventory of 47L16T-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 47L16T-I/SN is usually 5 days.
3.What payment methods are accepted for 47L16T-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 47L16T-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 47L16T-I/SN?
47L16T-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 47L16T-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 47L16T-I/SN?
For technical support, including 47L16T-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 47L16T-I/SN requirements.
6.How does Aetrix verify that 47L16T-I/SN is sourced from the original manufacturer or authorized distributors?
All 47L16T-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 47L16T-I/SN meets industry standards.
7.What is the process for return or replacement of 47L16T-I/SN?
All 47L16T-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 47L16T-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 47L16T-I/SN part is unused and in its original packaging.
Return procedure for 47L16T-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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