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Microchip Technology 47L16-E/SN
- Part No.:
- 47L16-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
47L16-E/SN.pdf
- Description:
- IC EERAM 16KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,469
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Product details
Overview
47L16-E/SN from Microchip Technology is a 16 Kbit (2,048 × 8) I²C serial EERAM combining volatile SRAM with nonvolatile EEPROM backup. It operates from 2.7V–3.6V, supports up to 1 MHz I²C, and delivers automatic power-loss data retention via VCAP capacitor-assisted store/recall. Used in industrial control systems requiring persistent memory without external backup circuitry.
For engineers reviewing the 47L16-E/SN datasheet, 47L16-E/SN pinout, 47L16-E/SN application, or 47L16-E/SN equivalent, this page provides verified electrical specs, I²C timing compliance, SRAM/EEPROM endurance metrics, hardware store trigger behavior, and real-world use cases in automotive and industrial embedded systems.
Technical Context
The 47L16-E/SN implements a dual-memory architecture: a 2,048 × 8-bit SRAM array for high-speed read/write access and an integrated EEPROM array for nonvolatile backup. Store operations transfer SRAM contents to EEPROM either automatically on VCC fall below 2.4–2.6 V (VTRIP), manually via HS pin pulse ≥150 ns, or through software command (0x55 + 0x33).
Recall restores EEPROM data to SRAM on power-up or via software (0x55 + 0xDD); both operations block I²C access for up to 25 ms (store) or 5 ms (recall). The STATUS register (address 0x00) controls ASE (Auto-Store Enable), BP<2:0> (software write protection), and AM (Array Modified flag), with nonvolatile storage of BP and ASE bits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Density | 16 Kbit (2,048 × 8-bit SRAM + matching EEPROM) |
| VCC Range | 2.7V–3.6V - compatible with 3.3V logic systems and low-power industrial rails |
| I²C Speed | Up to 1 MHz - enables fast configuration and logging without bus contention |
| Store Time | ≤25 ms - ensures full SRAM-to-EEPROM transfer before power collapse |
| Recall Time | ≤5 ms - restores valid RAM state rapidly at system boot |
| EEPROM Endurance | 1,000,000 store cycles - supports frequent parameter updates in field-deployed devices |
| Data Retention | >200 years - guarantees long-term data integrity without refresh |
| ESD Protection | >4 kV HBM - robust against handling and board-level electrostatic discharge |
Pinout & Package
47L16-E/SN is supplied in an 8-lead SOIC package (SN suffix), with 1.27 mm pitch, 5.0 mm × 4.0 mm body size, and JEDEC MS-012AC compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCAP | Auto-store capacitor connection | External 8–10 µF capacitor required to enable voltage-fall-triggered SRAM→EEPROM transfer |
| 2 - A1 | Chip select input | User-configurable address bit; sets LSB of 7-bit I²C client address (1010 A2 A1 0) |
| 3 - A2 | Chip select input | User-configurable address bit; sets MSB of 7-bit I²C client address (1010 A2 A1 0) |
| 4 - VSS | Ground reference | Return path for all internal circuits; must be low-impedance to minimize noise coupling |
| 5 - VCC | Power supply | 2.7V–3.6V main supply; powers SRAM, EEPROM, and I²C interface logic |
| 6 - HS | Hardware store trigger | Active-high pulse ≥150 ns initiates immediate SRAM→EEPROM store independent of VCC level |
| 7 - SCL | I²C clock input | Controls data sampling; supports 100 kHz / 400 kHz / 1 MHz modes with Schmitt-trigger input |
| 8 - SDA | I²C bidirectional data | Open-drain I/O with Schmitt-trigger input; requires external pull-up resistor per I²C spec |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Store/Recall | SRAM↔EEPROM transfer triggered by VCC drop/rise without host intervention - eliminates firmware dependency for data persistence |
| Hardware Store Pin (HS) | Dedicated asynchronous trigger for deterministic, low-latency SRAM→EEPROM save - critical for emergency parameter capture |
| Software-Controlled Operations | Store (0x55+0x33) and Recall (0x55+0xDD) commands executed via I²C - enables precise control over backup timing |
| Configurable Write Protection | STATUS register BP<2:0> bits protect 1/64 to full SRAM array - prevents accidental overwrite of calibration or configuration data |
| Nonvolatile Event Flag | EVENT bit in STATUS register latches HS pin transitions - provides audit trail for manual store events across power cycles |
| Industrial Temperature Range | -40°C to +125°C (Extended grade) - qualified for under-hood automotive and harsh-environment industrial use |
Applications
| Industrial PLC Data Logging | Automotive Body Control Module |
|---|---|
Use Scenario: Storing runtime parameters (e.g., valve positions, sensor offsets) during active operation and preserving them across unexpected brownouts. IC Role / Device Role / Timing Role: Nonvolatile memory buffer that bridges power gaps between main supply failure and backup battery activation. Use Value: Eliminates need for external supercapacitor or battery-backed SRAM, reducing BOM cost and board space while ensuring >200-year data retention. |
Use Scenario: Capturing door lock status, mirror position, or seat memory settings before ignition-off power removal. IC Role / Device Role / Timing Role: Power-fail resilient memory node interfacing directly with MCU I²C bus; stores user preferences without MCU involvement. Use Value: Enables recall of personalized settings within 5 ms of power-on, meeting automotive infotainment startup timing requirements. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Parameters |
Use Scenario: Securing dose calibration constants and usage history logs during mains interruption or battery swap. IC Role / Device Role / Timing Role: High-reliability, AEC-Q100 qualified memory storing safety-critical configuration data with 1M-cycle endurance. Use Value: Guarantees integrity of medical device calibration data across 10+ years of field service, satisfying IEC 62304 traceability requirements. |
Use Scenario: Maintaining tariff tables, metering registers, and communication keys during grid outages or firmware updates. IC Role / Device Role / Timing Role: Tamper-resistant, software-write-protected memory holding utility-grade billing parameters with zero-refresh retention. Use Value: Prevents unauthorized modification of revenue-critical data via BP bits, while Auto-Store ensures no metering data loss during transient AC failures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonvolatile memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| FM24V10-G | 1 Mbit F-RAM (not SRAM+EEPROM); 2.7–3.6V; 1 MHz I²C; unlimited endurance; no VCAP capacitor needed | No auto-store on power loss - requires host-controlled save; faster random writes but lacks hardware store pin | Choose for ultra-high write-cycle applications where deterministic host control is preferred over autonomous power-fail response. |
| AT24C128C-MAHM-T | 128 Kbit I²C EEPROM only; 1.7–5.5V; 1 MHz; no SRAM layer; no auto-store or hardware trigger | Requires explicit MCU-initiated writes; slower write times (~5 ms/page); no instant recall capability | Choose when cost sensitivity outweighs performance needs and system firmware can manage all backup operations. |
Compared with FM24V10-G and AT24C128C-MAHM-T, the 47L16-E/SN uniquely combines autonomous power-loss response, hardware-triggered store, and instant SRAM-like access - making it optimal for systems where MCU intervention cannot be guaranteed during brownout events.
Availability
47L16-E/SN is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device applications requiring stable component supply, extended temperature operation, and guaranteed nonvolatile memory retention.
Supply support for 47L16-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 is a global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with emphasis on reliability, longevity, and industrial-grade qualification.
The 47L16-E/SN belongs to Microchip's EERAM product line, designed specifically for applications needing seamless, autonomous SRAM-to-nonvolatile backup without external controllers or complex firmware logic.
FAQ
What is the function of the VCAP pin on the 47L16-E/SN?
The VCAP pin on the 47L16-E/SN connects to an external 8–10 µF capacitor that supplies hold-up energy during VCC collapse. When VCC falls below the 2.4–2.6 V trip threshold (VTRIP), the 47L16-E/SN uses charge stored on this capacitor to complete an automatic SRAM-to-EEPROM store operation - ensuring no data loss occurs during power interruption. Without VCAP, Auto-Store must be disabled to prevent EEPROM corruption.
How does the Hardware Store (HS) pin differ from Software Store on the 47L16-E/SN?
The HS pin on the 47L16-E/SN provides an asynchronous, hardware-level trigger for immediate SRAM-to-EEPROM store - activated by any high-going pulse ≥150 ns, regardless of VCC level or I²C bus state. In contrast, Software Store requires issuing the 0x55 + 0x33 command sequence over I²C and only executes when the device is not busy. The HS pin enables deterministic, low-latency saves critical for emergency parameter capture.
Can the 47L16-E/SN operate without an external capacitor?
Yes, the 47L16-E/SN can operate without an external capacitor on VCAP, but Auto-Store functionality must be disabled by clearing the ASE bit in the STATUS register (0x00). In this mode, SRAM retains data only while powered, and store/recall operations rely solely on Software or Hardware Store commands. Connecting VCAP to VCC is mandatory if the capacitor is omitted, per Microchip DS20005371E-page 15 Note.
What is the maximum I²C clock frequency supported by the 47L16-E/SN?
The 47L16-E/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 high-throughput configuration and logging in bandwidth-constrained embedded systems while maintaining noise immunity via Schmitt-trigger inputs on SDA and SCL.
How is write protection implemented in the 47L16-E/SN?
Write protection in the 47L16-E/SN is controlled by the BP<2:0> bits in the STATUS register (0x00), which define protected SRAM address ranges from none to full array (000 to 111). Protection is enforced at the hardware level: attempts to write to protected regions result in NACK after the data byte, terminating the operation without incrementing the address pointer. BP bits are nonvolatile and retain settings across power cycles.
47L16-E/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
47L16-E/SN FAQ
1.How can I place an order for 47L16-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 47L16-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 47L16-E/SN reliable?
The price and inventory of 47L16-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 47L16-E/SN is usually 5 days.
3.What payment methods are accepted for 47L16-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 47L16-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 47L16-E/SN?
47L16-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 47L16-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 47L16-E/SN?
For technical support, including 47L16-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 47L16-E/SN requirements.
6.How does Aetrix verify that 47L16-E/SN is sourced from the original manufacturer or authorized distributors?
All 47L16-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 47L16-E/SN meets industry standards.
7.What is the process for return or replacement of 47L16-E/SN?
All 47L16-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 47L16-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 47L16-E/SN part is unused and in its original packaging.
Return procedure for 47L16-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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