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Microchip Technology 47C04-I/SN
- Part No.:
- 47C04-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
47C04-I/SN.pdf
- Description:
- IC EERAM 4KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,328
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Product details
Overview
47C04-I/SN from Microchip Technology is a 4 Kbit (512 × 8) I²C serial EERAM combining volatile SRAM with nonvolatile EEPROM backup. It operates from 4.5V to 5.5V, supports up to 1 MHz I²C clock, and delivers automatic power-loss data retention via VCAP capacitor-assisted store/recall. It serves as a drop-in replacement for battery-backed SRAM in industrial control and automotive infotainment systems requiring >200-year data retention and >1 million EEPROM store cycles.
For engineers reviewing the 47C04-I/SN datasheet, 47C04-I/SN pinout, 47C04-I/SN application, or 47C04-I/SN equivalent, key selection criteria include its 4.5–5.5V supply range, hardware Store pin (HS), Auto-Store trip voltage (4.0–4.4V), 8 ms max Store time, and software-configurable write protection covering 1/64 to full SRAM array.
Technical Context
The 47C04-I/SN implements a dual-memory architecture where SRAM provides high-speed read/write access while EEPROM preserves data during power loss. Its I²C interface uses Schmitt-trigger inputs, supports cascading up to four devices, and enforces strict timing compliance (e.g., THIGH/TLOW ≥500 ns, TAA ≤400 ns).
Store and Recall operations are managed through three independent mechanisms: automatic execution on VCC fall below VTRIP (4.0–4.4V), manual trigger via HS pin (≥150 ns pulse), or software command (0x33 for Store, 0xDD for Recall). The STATUS register (address 0x00) controls ASE (Auto-Store Enable), BP<2:0> (block protection), and AM (Array Modified) status.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Kbit (512 × 8 bits) SRAM with integrated EEPROM backup |
| Supply Voltage | 4.5V–5.5V - compatible with standard 5V logic systems and avoids level-shifting overhead |
| I²C Speed | Up to 1 MHz - enables fast configuration and bulk data transfers without bus contention |
| Store Time | ≤8 ms - ensures rapid nonvolatile save before brownout-induced system reset |
| Data Retention | >200 years - guarantees long-term data integrity without battery or refresh circuitry |
| EEPROM Endurance | 1,000,000 store cycles - supports frequent logging or parameter updates in field-deployed equipment |
| Operating Temp | −40°C to +85°C (Industrial grade) - validated for use in motor control, PLCs, and automotive body electronics |
Pinout & Package
47C04-I/SN is housed in an 8-lead SOIC (Small Outline Integrated Circuit) package with gull-wing leads, 1.27 mm pitch, and JEDEC MS-012AC compliant footprint. It supports surface-mount reflow assembly and offers thermal performance suitable for industrial ambient conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCAP | Auto-Store capacitor connection | Accepts 3.5–4.7 µF external capacitor to enable automatic SRAM→EEPROM transfer on power-down |
| 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 | Return path for all internal circuits; must be low-impedance to minimize noise coupling into SRAM |
| VCC | Power supply input | 4.5–5.5V main supply; powers both SRAM and EEPROM; trip point (VTRIP = 4.0–4.4V) triggers auto-store |
| HS | Hardware Store input | Active-high asynchronous trigger for immediate SRAM→EEPROM transfer; requires ≥150 ns pulse width |
| SCL | I²C clock input | Controls data sampling timing; Schmitt-triggered for robust noise immunity in electrically noisy environments |
| SDA | I²C bidirectional data line | Open-drain interface with ±1 µA leakage; supports multi-master arbitration and ACK/NACK signaling |
Key Features
| Feature | Design Value |
|---|---|
| Auto-Store on Power Loss | Uses external VCAP capacitor to initiate SRAM→EEPROM transfer when VCC drops below 4.0–4.4V - eliminates need for backup battery or supercapacitor management IC |
| Software Write Protection | Configurable via STATUS register BP<2:0> bits to protect 1/64 to full 512-byte SRAM array - prevents accidental overwrites in firmware-updatable systems |
| Hardware Store Pin (HS) | Dedicated asynchronous input enabling deterministic, sub-millisecond initiation of store operation - critical for safety-critical shutdown sequences |
| Nonvolatile Event Flag | EVENT bit in STATUS register latches external HS pin transitions - enables host MCU to detect and timestamp power-fail events or user-initiated saves |
| Zero-Cycle-Delay I²C | Immediate read/write response after ACK - removes pipeline latency in real-time sensor buffering and control loop memory access |
Applications
| Industrial PLC Data Logging | Automotive Infotainment Settings |
|---|---|
Use Scenario: Storing runtime configuration, calibration offsets, and fault history in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile memory buffer that retains SRAM contents across uncontrolled power cycles and supports <10 ms store latency during emergency shutdown. Use Value: Eliminates battery maintenance and extends system lifetime beyond 10 years while meeting IEC 61131-2 surge immunity requirements. |
Use Scenario: Preserving user preferences (volume, equalizer, radio presets) and adaptive learning parameters in head units exposed to automotive thermal cycling. IC Role / Device Role / Timing Role: I²C-connected EERAM providing instant-access SRAM with guaranteed EEPROM backup on ignition-off transition. Use Value: Delivers seamless user experience with zero boot-time restore delay and >200-year data retention under −40°C to +85°C operation. |
| Medical Device Calibration Storage | Smart Energy Meter Parameter Backup |
Use Scenario: Securing factory-calibrated sensor coefficients and regulatory audit logs in portable diagnostic equipment with intermittent power. IC Role / Device Role / Timing Role: Tamper-resistant memory element supporting software write protection and hardware-triggered store on low-battery detection. Use Value: Ensures FDA 21 CFR Part 11 compliance via immutable calibration records and >1M endurance for daily recalibration cycles. |
Use Scenario: Backing up tariff schedules, billing counters, and communication keys in ANSI C12.22-compliant electricity meters deployed in utility substations. IC Role / Device Role / Timing Role: High-reliability serial memory interfacing directly with metrology SoC over I²C at 400 kHz, with auto-store triggered by AC mains failure. Use Value: Guarantees revenue-grade data integrity across 15+ year field life without battery replacement or EEPROM wear leveling firmware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EERAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 47L04-I/SN | 2.7–3.6V supply range; lower VTRIP (2.4–2.6V); same 4 Kbit density and pinout | Targeted at 3.3V embedded systems (e.g., ARM Cortex-M microcontrollers), not 5V industrial buses | Select when main system rail is 3.3V and brownout detection occurs below 2.6V |
| FM24CL04B-G | Cypress (Infineon) 4 Kbit F-RAM; no store time limit; 10¹⁴ endurance; 2.7–3.6V only | Eliminates store latency entirely but requires voltage translation for 5V hosts and lacks hardware Store pin | Choose for ultra-high-write-cycle applications where deterministic <1 µs write latency is mandatory |
Compared with 47L04-I/SN and FM24CL04B-G, the 47C04-I/SN uniquely balances 5V compatibility, hardware-triggered store, and cost-effective EEPROM endurance-making it optimal for retrofitting legacy 5V designs with battery-free nonvolatility.
Availability
47C04-I/SN is available at Aetrix Electronics and suitable for industrial automation, automotive subsystems, and medical instrumentation requiring stable component supply across extended product lifecycles.
Supply support for 47C04-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 is a global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with emphasis on reliability, longevity, and industrial-grade qualification.
The 47C04-I/SN belongs to Microchip's EERAM family, designed specifically to replace battery-backed SRAM in mission-critical applications where maintenance-free, long-life nonvolatile storage is required.
FAQ
What is the function of the VCAP pin on the 47C04-I/SN?
The VCAP pin on the 47C04-I/SN connects to an external 3.5–4.7 µF capacitor that supplies hold-up energy during VCC collapse. When VCC falls below the Auto-Store trip voltage (4.0–4.4V), the 47C04-I/SN uses charge stored on this capacitor to complete a full SRAM-to-EEPROM transfer within 8 ms. If VCAP is left unconnected, Auto-Store must be disabled via the STATUS register ASE bit to prevent data corruption.
How does the Hardware Store (HS) pin operate on the 47C04-I/SN?
The HS pin on the 47C04-I/SN is an active-high, asynchronous input that initiates an immediate SRAM-to-EEPROM store operation upon detection of a ≥150 ns pulse. This operation proceeds independently of I²C bus activity and suspends all other device functions until completion (≤8 ms). The EVENT bit in the STATUS register is set upon HS assertion, allowing the host MCU to log the event.
Can the 47C04-I/SN be used in a 3.3V system?
No - the 47C04-I/SN is specified only for 4.5V–5.5V operation and will not function reliably below 4.5V. For 3.3V systems, Microchip's 47L04-I/SN (2.7V–3.6V) is the functionally identical pin-compatible alternative with adjusted VTRIP (2.4–2.6V) and lower ICC values. Using 47C04-I/SN at 3.3V violates Absolute Maximum Ratings and risks data loss or device damage.
What happens if a write attempt targets a protected SRAM block on the 47C04-I/SN?
When software write protection is enabled (BP<2:0> ≠ 000), the 47C04-I/SN responds with a NoACK after receiving the data byte intended for a protected address. The current write operation terminates immediately, the Address Pointer remains unchanged, and subsequent SDA traffic is ignored until a new Start condition is issued. This behavior prevents silent corruption and provides clear bus-level feedback to the host controller.
Is the 47C04-I/SN AEC-Q100 qualified?
Yes - the 47C04-I/SN carries AEC-Q100 qualification for Automotive Grade 2 (−40°C to +105°C), though its official temperature grade is Industrial (−40°C to +85°C). This dual qualification confirms its suitability for under-hood and body-control module applications where extended thermal margin and failure-mode testing are required per automotive standards.
47C04-I/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:
- 4Kbit
- Memory Organization:
- 512 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-SOIC
47C04-I/SN FAQ
1.How can I place an order for 47C04-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 47C04-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 47C04-I/SN reliable?
The price and inventory of 47C04-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 47C04-I/SN is usually 5 days.
3.What payment methods are accepted for 47C04-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 47C04-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 47C04-I/SN?
47C04-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 47C04-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 47C04-I/SN?
For technical support, including 47C04-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 47C04-I/SN requirements.
6.How does Aetrix verify that 47C04-I/SN is sourced from the original manufacturer or authorized distributors?
All 47C04-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 47C04-I/SN meets industry standards.
7.What is the process for return or replacement of 47C04-I/SN?
All 47C04-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 47C04-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 47C04-I/SN part is unused and in its original packaging.
Return procedure for 47C04-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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