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Microchip Technology 47L16T-E/SN
- Part No.:
- 47L16T-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
47L16T-E/SN.pdf
- Description:
- IC EERAM 16KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,961
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Product details
Overview
47L16T-E/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 and extended-temperature applications (–40°C to +125°C), it operates at 2.7V–3.6V and delivers 1 MHz I²C interface performance.
For engineers reviewing the 47L16T-E/SN datasheet, 47L16T-E/SN pinout, 47L16T-E/SN application, or 47L16T-E/SN equivalent, key selection criteria 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-E/SN implements a client-side I²C protocol with fixed 4-bit op codes (1010 for SRAM, 0011 for control registers) and user-configurable A1/A2 address bits enabling up to four devices on one bus. Its memory hierarchy uses SRAM for high-speed read/write (infinite cycles) and EEPROM for nonvolatile retention (>200 years, >1 million store cycles).
Power management is tightly coupled to VCAP: Auto-Store triggers when VCC falls below VTRIP (2.4–2.6 V), requiring an external 10 µF capacitor; HS pin enables manual Store independent of VCAP; STATUS register (00h) controls ASE (Auto-Store Enable), BP<2:0> (block protection), and AM (Array Modified) flag - all nonvolatile except AM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| 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; VTRIP = 2.4–2.6 V for Auto-Store activation |
| I²C Speed | Up to 1 MHz - supports high-throughput data logging without CPU intervention |
| Store Time | ≤25 ms - ensures full SRAM-to-EEPROM transfer before power collapse |
| Recall Time | ≤5 ms - restores valid data to SRAM within milliseconds of power-up |
| Data Retention | >200 years - guarantees long-term nonvolatile storage without refresh |
| Endurance | 1,000,000 EEPROM store cycles - suitable for frequent power-cycle environments |
Pinout & Package
47L16T-E/SN is housed in an 8-lead SOIC package (SN suffix), with 1.27 mm pitch, JEDEC MS-012AC compliant, and rated for –40°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCAP | Auto-Store capacitor connection | Accepts 8–10 µF external capacitor; enables automatic SRAM→EEPROM transfer on VCC drop below 2.4 V |
| A1, A2 | Device address select inputs | Set 2-bit chip select; enable up to four 47L16T-E/SN devices on same I²C bus |
| VSS | Ground reference | Return path for all internal circuitry; must be low-impedance for noise immunity |
| VCC | Supply voltage input | 2.7–3.6 V DC; powers SRAM, EEPROM, and I²C interface logic |
| HS | Hardware Store trigger | Pulse ≥150 ns high to initiate immediate SRAM→EEPROM store, independent of VCAP |
| SCL | I²C clock input | Accepts 0–1 MHz clock; Schmitt-triggered for robust noise rejection |
| SDA | I²C bidirectional data line | Open-drain, supports multi-master arbitration; includes internal pull-down resistance |
Key Features
| Feature | Design Value |
|---|---|
| Auto-Store with external capacitor | Enables zero-software, zero-intervention data preservation during unexpected power loss |
| Software-controlled Store/Recall | Allows deterministic, timed SRAM↔EEPROM transfers via I²C command writes (0x55 + 0x33 / 0xDD) |
| Configurable write protection | BP<2:0> bits protect 1/64 to full SRAM array - prevents accidental overwrites in critical firmware/data zones |
| Nonvolatile event detection flag | EVENT bit in STATUS register captures external HS pin transitions for system-level fault logging |
| Industrial/extended temperature support | Rated for –40°C to +125°C ambient - validated for under-hood automotive and harsh industrial deployments |
Applications
| Industrial Data Logger | Automotive Telematics Unit |
|---|---|
Use Scenario: Continuous sensor sampling with periodic power cycling in remote monitoring nodes. IC Role / Device Role / Timing Role: Nonvolatile SRAM buffer that retains last valid measurement set across brownouts. Use Value: Eliminates need for battery-backed RAM or external EEPROM sequencing, reducing BOM count and layout complexity. |
Use Scenario: Storing vehicle diagnostic trouble codes (DTCs) and configuration parameters in ADAS ECUs. IC Role / Device Role / Timing Role: High-reliability memory subsystem ensuring DTC persistence after ignition-off events. Use Value: Meets AEC-Q100 Grade 1 requirements with guaranteed 200-year data retention and 1M endurance cycles. |
| Smart Meter Firmware Cache | Medical Infusion Pump Settings |
Use Scenario: Caching utility meter firmware updates and calibration constants during OTA download windows. IC Role / Device Role / Timing Role: Dual-port memory where SRAM serves as active execution buffer and EEPROM preserves validated code images. Use Value: Enables atomic firmware rollback on corruption - recall last known-good image in <5 ms after reset. |
Use Scenario: Preserving drug dosage profiles and alarm thresholds across clinical power interruptions. IC Role / Device Role / Timing Role: Safety-critical nonvolatile storage with hardware-triggered store on power-fail detection. Use Value: HS pin integration allows direct connection to power-monitoring ICs for sub-millisecond store initiation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EERAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 47L16T-I/SN | Same 16 Kbit EERAM, but rated for –40°C to +85°C only; VTRIP identical (2.4–2.6 V); identical pinout and command set | Not qualified for extended-temperature automotive or industrial edge deployments | Select when operating ambient stays ≤85°C and cost sensitivity outweighs extended-temp margin |
| FM24V10-G | 1 Mbit F-RAM (not SRAM+EEPROM); no VCAP required; 10-year data retention; unlimited endurance; 3.0–3.6 V supply | Lacks Auto-Store timing control and hardware HS pin; no block-level write protection | Choose for ultra-high-write-cycle applications where deterministic store latency is less critical than endurance |
Compared with 47L16T-E/SN, the 47L16T-I/SN sacrifices extended temperature capability for lower cost, while FM24V10-G replaces the SRAM/EEPROM hybrid architecture with ferroelectric memory - eliminating store time but removing configurable protection and event-detection features essential for safety-critical power-loss recovery.
Availability
47L16T-E/SN is available at Aetrix Electronics and suitable for industrial data loggers, automotive telematics units, and medical infusion pump designs requiring stable component supply, extended-temperature reliability, and deterministic nonvolatile memory behavior.
Supply support for 47L16T-E/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, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 47L16T-E/SN belongs to Microchip's EERAM product line - engineered specifically for applications demanding seamless, low-latency bridging between volatile speed and nonvolatile persistence without battery or supercapacitor dependencies.
FAQ
What is the function of the VCAP pin on the 47L16T-E/SN?
The VCAP pin on the 47L16T-E/SN connects to an external 8–10 µF capacitor that supplies hold-up energy during VCC collapse. When VCC drops below the Auto-Store trip voltage (2.4–2.6 V), the 47L16T-E/SN automatically transfers SRAM contents to EEPROM. Without VCAP, Auto-Store must be disabled (ASE = 0) and manual Store via HS pin or software command must be used.
How does the 47L16T-E/SN handle write protection of its SRAM array?
The 47L16T-E/SN implements software-configurable write protection via BP<2:0> bits in the STATUS register (address 00h). These bits allow protection of 1/64 to the full 2,048-byte SRAM array - for example, BP<2:0> = 111 protects addresses 000h–7FFh, while 001 protects only 7E0h–7FFh. Protection is nonvolatile and persists across power cycles.
Can the 47L16T-E/SN operate on a standard 100 kHz I²C bus?
Yes, the 47L16T-E/SN fully supports standard-mode (100 kHz), fast-mode (400 kHz), and fast-mode plus (1 MHz) I²C operation. Its Schmitt-trigger inputs on SDA and SCL ensure reliable communication even in electrically noisy environments, and zero-cycle-delay reads/writes maintain timing compliance across all supported speeds.
What is the purpose of the HS pin on the 47L16T-E/SN?
The HS (Hardware Store) pin on the 47L16T-E/SN provides a dedicated, asynchronous method to initiate SRAM-to-EEPROM transfer. A ≥150 ns high pulse on HS triggers immediate Store regardless of VCAP status or ASE setting. This enables integration with external power-fail detectors or system supervisors for precise, deterministic store timing.
Is the 47L16T-E/SN AEC-Q100 qualified?
Yes, the 47L16T-E/SN is AEC-Q100 qualified for Grade 1 (–40°C to +125°C) operation. This qualification covers stress testing for temperature cycling, humidity, ESD (>4 kV), and lifetime reliability - confirming suitability for automotive powertrain, chassis, and ADAS applications where data integrity across power transitions is mission-critical.
47L16T-E/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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
47L16T-E/SN FAQ
1.How can I place an order for 47L16T-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 47L16T-E/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-E/SN reliable?
The price and inventory of 47L16T-E/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-E/SN is usually 5 days.
3.What payment methods are accepted for 47L16T-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 47L16T-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 47L16T-E/SN?
47L16T-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 47L16T-E/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-E/SN?
For technical support, including 47L16T-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 47L16T-E/SN requirements.
6.How does Aetrix verify that 47L16T-E/SN is sourced from the original manufacturer or authorized distributors?
All 47L16T-E/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-E/SN meets industry standards.
7.What is the process for return or replacement of 47L16T-E/SN?
All 47L16T-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 47L16T-E/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-E/SN part is unused and in its original packaging.
Return procedure for 47L16T-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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