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Microchip Technology 47C16-E/SN
- Part No.:
- 47C16-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
47C16-E/SN.pdf
- Description:
- IC EERAM 16KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:980
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Product details
Overview
47C16-E/SN 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. It is used in industrial control modules where persistent memory state must survive frequent power cycling without battery support.
For engineers reviewing the 47C16-E/SN datasheet, 47C16-E/SN pinout, 47C16-E/SN application, or 47C16-E/SN equivalent, key selection criteria include its 25 ms max store time, software/hardware-triggered recall, 1 million EEPROM store cycles, and AEC-Q100-qualified extended temperature operation (–40°C to +125°C).
Technical Context
The 47C16-E/SN integrates dual-memory architecture: a 2,048 × 8-bit SRAM array for high-speed read/write access and a matching EEPROM array for nonvolatile backup. Its I²C interface implements standard 7-bit addressing with user-configurable A1/A2 pins and supports 100 kHz, 400 kHz, and 1 MHz clock rates with zero-cycle-delay transfers.
Power management is handled through VCAP-based auto-store detection (trip voltage 4.0–4.4 V), hardware Store (HS) pin triggering, and STATUS register-controlled software commands. The AM bit tracks SRAM modification status, while BP<2:0> bits enable granular 1/64–full-array write protection - all implemented without external logic or firmware overhead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Density | 16 Kbit (2,048 × 8 organization) - provides sufficient buffer space for real-time sensor logging or configuration storage in edge nodes. |
| VCC Range | 4.5 V to 5.5 V - compatible with standard 5 V industrial bus rails and legacy microcontroller I/O domains. |
| I²C Speed | Up to 1 MHz - enables fast SRAM writes during system boot or configuration updates without I²C bus contention. |
| Store Time | ≤25 ms (max) - ensures full SRAM-to-EEPROM transfer completes before VCC drops below POR threshold. |
| Data Retention | >200 years - guarantees EEPROM-stored calibration or device identity remains valid over product lifetime. |
| Endurance | 1,000,000 store cycles - supports daily firmware update logging or parameter tuning in field-deployed equipment. |
| Temp Range | –40°C to +125°C (Extended) - validated for under-hood automotive ECUs and industrial motor drives. |
Pinout & Package
47C16-E/SN is supplied in an 8-lead SOIC package (SN suffix), with 1.27 mm pitch, JEDEC MS-012AC compliant footprint, and Pb-free matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCAP | Auto-store energy reservoir input | Connects external 5–6.8 µF capacitor to enable automatic SRAM→EEPROM transfer on VCC drop below 4.0 V. |
| A1, A2 | User-configurable I²C address bits | Set device address within 0x50–0x57 range; allow up to four 47C16-E/SN devices on same I²C bus. |
| VSS | Ground reference | Must be low-impedance connection to system ground plane to ensure noise-immune Schmitt-trigger I/O operation. |
| VCC | Power supply input | Accepts 4.5–5.5 V; internal POR circuit activates only above 1.1 V to prevent partial initialization. |
| HS | Hardware Store trigger | Pulse ≥150 ns high to initiate immediate SRAM→EEPROM transfer - used for deterministic save-on-event. |
| SCL | I²C clock input | Accepts 100 kHz–1 MHz clock; internal Schmitt trigger suppresses noise on long traces or noisy environments. |
| SDA | I²C bidirectional data line | Open-drain output with ±1 µA leakage; requires external pull-up (typically 2.2–10 kΩ) to VCC. |
Key Features
| Feature | Design Value |
|---|---|
| SRAM + EEPROM integration | Eliminates need for separate RAM and EEPROM ICs, reducing BOM count and PCB area in space-constrained controllers. |
| Auto-store on power loss | Preserves last valid SRAM state without host intervention - critical for black-box logging in unattended systems. |
| Software write protection | Configurable BP<2:0> bits protect 1/64 to full SRAM array, preventing accidental overwrite of calibration or security keys. |
| Hardware Store pin (HS) | Enables deterministic, sub-millisecond initiation of store operations - essential for safety-critical save-before-shutdown sequences. |
| Nonvolatile event flag | EVENT bit in STATUS register latches external HS pin transitions, enabling host firmware to detect unscheduled power events. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Module |
|---|---|
Use Scenario: Storing per-channel calibration coefficients and fault history across power cycles in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile memory controller handling SRAM buffering and EEPROM backup during mains interruption or brownout. Use Value: Enables deterministic restore of I/O state after reboot, eliminating reconfiguration delays and ensuring continuity of process control loops. |
Use Scenario: Retaining seat position memory, mirror settings, and door lock configuration in vehicle body domain controllers operating under AEC-Q100 stress conditions. IC Role / Device Role / Timing Role: Power-fail-resilient configuration storage with hardware-triggered store on ignition-off signal. Use Value: Guarantees user preferences persist across battery disconnects and cold cranking events without requiring backup battery or supercapacitor. |
| Smart Energy Meter | Medical Infusion Pump Controller |
Use Scenario: Logging cumulative kWh consumption, tamper events, and time-of-use tariff data in utility-grade meters subject to frequent grid interruptions. IC Role / Device Role / Timing Role: High-endurance data logger using EEPROM for archival storage and SRAM for real-time accumulation. Use Value: Achieves >200-year data retention and 1M+ store cycles - meeting ANSI C12.20 and IEC 62053 accuracy certification requirements. |
Use Scenario: Preserving drug delivery profiles, dose history, and alarm thresholds in battery-powered infusion pumps requiring FDA Class II compliance. IC Role / Device Role / Timing Role: Fail-safe memory subsystem that captures therapy state prior to power loss or emergency shutdown. Use Value: Ensures audit trail integrity and enables safe resume-after-interruption - satisfying IEC 62304 software lifecycle and IEC 60601-1 risk management mandates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonvolatile SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| FM24V10-G | 1 Mbit F-RAM (not SRAM+EEPROM); 2.7–3.6 V only; no VCAP dependency; 10⁴× faster write endurance (10¹⁴ cycles) | Better for high-frequency logging; incompatible with 5 V systems; lacks hardware Store pin and ASE bit control | Select when write speed and cycle count outweigh voltage compatibility and deterministic store timing needs. |
| AT24C128C-SSHL-T | 128 Kbit I²C EEPROM only; no SRAM layer; 1.7–5.5 V; 100 kHz/400 kHz only; no auto-store or HS pin | Requires host-managed buffering; slower random writes; no power-loss automation | Select when cost sensitivity dominates and host MCU can handle full SRAM emulation in firmware. |
Compared with FM24V10-G and AT24C128C-SSHL-T, the 47C16-E/SN uniquely balances 5 V compatibility, hardware-assisted power-loss resilience, and configurable protection - making it optimal for industrial and automotive systems where deterministic, low-overhead nonvolatile storage is mandatory.
Availability
47C16-E/SN is available at Aetrix Electronics and suitable for industrial PLCs, automotive body controllers, smart energy meters, and medical infusion pumps requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for 47C16-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, FPGA, and memory solutions, serving industrial, automotive, and communications markets with vertically integrated silicon and development tools.
The 47C16-E/SN belongs to Microchip's EERAM family, designed specifically to replace battery-backed SRAM and discrete EEPROM+SRAM combinations in systems demanding seamless, autonomous nonvolatile data preservation during power transitions.
FAQ
What is the function of the VCAP pin on the 47C16-E/SN?
The VCAP pin on the 47C16-E/SN connects to an external 5–6.8 µF capacitor that supplies energy during VCC collapse, enabling automatic SRAM-to-EEPROM store when VCC drops below 4.0–4.4 V. If VCAP is left unconnected, the ASE bit must be disabled to prevent EEPROM corruption, and manual store via HS pin or software command becomes mandatory. This design eliminates reliance on backup batteries while maintaining data integrity across power failures.
How does the 47C16-E/SN differ from standard I²C EEPROMs like the AT24C128C?
Unlike the AT24C128C - which is a pure EEPROM requiring host-managed write buffering - the 47C16-E/SN integrates a 2,048 × 8 SRAM array with transparent EEPROM backup. It supports zero-latency SRAM reads/writes, automatic power-loss store/recall, hardware Store triggering via HS pin, and software-configurable write protection. These features reduce host MCU firmware complexity and eliminate external components needed for battery-backed SRAM alternatives.
Can the 47C16-E/SN operate at 1 MHz I²C speed across its full temperature range?
Yes, the 47C16-E/SN supports 1 MHz I²C operation from –40°C to +125°C (Extended temperature grade). Its AC characteristics table specifies maximum clock frequency of 1000 kHz under all tested conditions, and Schmitt-trigger inputs on SDA/SCL ensure robust noise immunity even at high speed in electrically noisy industrial or automotive environments. No derating is required for timing compliance.
What happens if a write attempt targets a software-protected region of the 47C16-E/SN SRAM?
If a write targets a region protected by BP<2:0> bits in the STATUS register, the 47C16-E/SN will not issue an ACK after the data byte is received. The current operation terminates immediately, the Address Pointer remains unchanged, and subsequent SDA traffic is ignored until a new START condition is issued. This prevents silent corruption and provides clear protocol-level feedback to the host that protection is active.
Is the 47C16-E/SN AEC-Q100 qualified, and what does that qualification cover?
Yes, the 47C16-E/SN carries AEC-Q100 qualification for Extended temperature range (–40°C to +125°C). This includes stress testing for accelerated environmental exposure (HTOL, TC, UHST), ESD (≥4 kV HBM), latch-up immunity, and parametric validation across temperature and voltage extremes - confirming suitability for automotive body electronics, powertrain sensors, and infotainment subsystems where reliability under thermal and electrical stress is mandatory.
47C16-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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
47C16-E/SN FAQ
1.How can I place an order for 47C16-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 47C16-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 47C16-E/SN reliable?
The price and inventory of 47C16-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 47C16-E/SN is usually 5 days.
3.What payment methods are accepted for 47C16-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 47C16-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 47C16-E/SN?
47C16-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 47C16-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 47C16-E/SN?
For technical support, including 47C16-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 47C16-E/SN requirements.
6.How does Aetrix verify that 47C16-E/SN is sourced from the original manufacturer or authorized distributors?
All 47C16-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 47C16-E/SN meets industry standards.
7.What is the process for return or replacement of 47C16-E/SN?
All 47C16-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 47C16-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 47C16-E/SN part is unused and in its original packaging.
Return procedure for 47C16-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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