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Microchip Technology 47L04T-E/SN
- Part No.:
- 47L04T-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
47L04T-E/SN.pdf
- Description:
- IC EERAM 4KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,633
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Product details
Overview
47L04T-E/SN from Microchip Technology is a 4 Kbit I²C serial EERAM (SRAM with integrated EEPROM backup), organized as 512 × 8 bits, operating from 2.7V–3.6V, supporting up to 1 MHz I²C interface, and featuring automatic power-loss store/recall via external VCAP capacitor. It serves as nonvolatile data buffer in automotive and industrial control systems where SRAM speed and EEPROM endurance are jointly required.
For engineers reviewing the 47L04T-E/SN datasheet, 47L04T-E/SN pinout, 47L04T-E/SN application, or 47L04T-E/SN equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative parts - all grounded in Microchip's DS20005371E specification and AEC-Q100-qualified device behavior.
Technical Context
The 47L04T-E/SN implements a dual-memory architecture: volatile 4 Kbit SRAM for high-speed read/write access and nonvolatile EEPROM for data retention (>200 years). Its I²C client logic supports standard 100 kHz/400 kHz/1 MHz modes with Schmitt-trigger inputs and zero-cycle-delay transfers.
Power management is hardware- and software-coordinated: Auto-Store triggers on VCC fall below VTRIP (2.4–2.6 V), Hardware Store responds to HS pin pulse (≥150 ns), and Software Store/Recall execute via COMMAND register writes (0x33/0xDD). The STATUS register (0x00) provides AM flag tracking, BP-based write protection, and EVENT detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Density | 4 Kbit (512 × 8 bits) SRAM with EEPROM backup - defines maximum user-accessible volatile memory space |
| VCC Range | 2.7 V to 3.6 V - compatible with 3.3 V systems; excludes 5 V operation unlike 47C04 variants |
| I²C Clock Max | 1 MHz - enables fast configuration and data transfer without timing bottlenecks in host-controlled systems |
| Store Time | 8 ms max - ensures rapid nonvolatile save before power collapse, critical for event logging and state capture |
| Data Retention | >200 years - guarantees long-term EEPROM data integrity without refresh cycles |
| Endurance | 1 million store cycles - supports frequent power-cycle applications such as metering and telemetry |
| Temp Range | −40°C to +125°C (Extended grade) - qualified per AEC-Q100, suitable for under-hood automotive environments |
Pinout & Package
47L04T-E/SN is supplied in an 8-lead SOIC package (SN suffix), with gull-wing leads, 1.27 mm pitch, and JEDEC MS-012AC footprint. Pin functions are electrically validated per DS20005371E Figure 1-1 and Table 2-3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCAP | Auto-store energy storage node | Connects external capacitor (5–6.8 µF) to enable automatic SRAM→EEPROM transfer during power loss |
| A1, A2 | User-configurable chip select inputs | Set device I²C address bits; allow up to four devices on same bus (A2:A1 = 00–11) |
| VSS | Ground reference | Return path for all internal circuits; must be low-impedance to ensure noise immunity and stable recall timing |
| VCC | Supply voltage input | Primary power rail (2.7–3.6 V); trip point (2.4–2.6 V) triggers auto-store and disables access below VTRIP |
| HS | Hardware store trigger | Active-high pulse ≥150 ns initiates immediate SRAM→EEPROM store, independent of VCAP or ASE state |
| SCL | I²C clock input | Controls data sampling timing; Schmitt-triggered for robustness against bus noise and slow edges |
| SDA | I²C bidirectional data line | Open-drain, supports multi-master arbitration; requires external pull-up resistor (typically 2.2–10 kΩ) |
Key Features
| Feature | Design Value |
|---|---|
| Auto-store on power-down | Enables reliable data preservation without host intervention when VCC drops below 2.6 V (47LXX) |
| Software-initiated store/recall | Allows deterministic, timed nonvolatile operations via I²C write to COMMAND register (0x55 + 0x33 or 0xDD) |
| Selectable SRAM write protection | BP2:BP0 bits protect 1/64 to full array - prevents accidental overwrites in firmware-critical regions |
| Nonvolatile event flag | EVENT bit in STATUS register captures HS pin transitions even during power loss, enabling wake-on-event designs |
| AEC-Q100 qualified | Validated for automotive extended temperature range (−40°C to +125°C), including HTOL and TC testing |
Applications
| Automotive Telematics Unit | Industrial PLC Data Logger |
|---|---|
Use Scenario: Capturing GPS position, CAN bus diagnostics, and ignition cycle counters during vehicle power cycling. IC Role / Device Role / Timing Role: Nonvolatile SRAM buffer that retains last-known state across key-off events and enables instant resume on key-on. Use Value: Eliminates need for separate backup battery or supercapacitor circuitry while guaranteeing sub-8 ms store latency and >200-year data retention. |
Use Scenario: Recording sensor readings, fault codes, and operational timestamps in factory-floor controllers with intermittent AC supply. IC Role / Device Role / Timing Role: High-reliability memory co-processor handling volatile runtime data and persistent configuration storage in one die. Use Value: Reduces BOM count by merging SRAM + EEPROM functions, and supports 1M+ store cycles for daily log rollover without wear-out concerns. |
| Smart Energy Meter | Medical Infusion Pump Controller |
Use Scenario: Storing tariff schedules, accumulated kWh, and tamper-detection flags during mains dropout or battery switchover. IC Role / Device Role / Timing Role: Fail-safe data keeper synchronized to metering IC interrupts and power-monitoring signals. Use Value: Meets IEC 62056 requirements for data integrity during brownouts via hardware-triggered store (HS pin) and auto-store fallback. |
Use Scenario: Preserving infusion rate profiles, dose history, and calibration offsets across power interruptions or battery swaps. IC Role / Device Role / Timing Role: Safety-critical memory element ensuring therapy continuity and regulatory audit trail persistence. Use Value: AEC-Q100 qualification and 125°C operation support extended thermal validation; EEPROM endurance exceeds 10-year clinical usage. |
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 | Same 4 Kbit density and SOIC-8 package, but rated for −40°C to +85°C (Industrial grade), not Extended | Lacks AEC-Q100 qualification and 125°C operation - unsuitable for under-hood or high-temp industrial enclosures | Select only if ambient operating temperature remains ≤85°C and automotive qualification is unnecessary |
| FM24V04 | 4 Kbit F-RAM (not EERAM); no VCAP capacitor needed; unlimited endurance; 2.7–3.6 V; same SOIC-8 | F-RAM eliminates store latency and wear-out concerns but lacks hardware store (HS) pin and event flag functionality | Prefer when deterministic <100 ns write latency is mandatory and external capacitor placement is impractical |
Compared with 47L04-I/SN, the 47L04T-E/SN adds AEC-Q100 compliance and extended temperature margin; compared with FM24V04, it trades infinite endurance for hardware-triggered store and nonvolatile event detection - making it optimal for automotive-grade state capture with power-fail resilience.
Availability
47L04T-E/SN is available at Aetrix Electronics and suitable for automotive telematics, industrial data loggers, and smart metering applications requiring stable component supply, long-lifecycle support, and AEC-Q100-qualified reliability.
Supply support for 47L04T-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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with global manufacturing and quality certifications including ISO/TS 16949.
The 47L04T-E/SN belongs to Microchip's EERAM product line, designed specifically to replace discrete SRAM + EEPROM combinations in systems demanding both speed and nonvolatility - especially where power interruption resilience is mission-critical.
FAQ
What is the function of the VCAP pin on the 47L04T-E/SN?
The VCAP pin on the 47L04T-E/SN connects to an external capacitor (5–6.8 µF) that supplies energy during VCC collapse, enabling automatic SRAM-to-EEPROM store within 8 ms. If VCAP is unconnected, the pin must be tied to VCC and Auto-Store disabled (ASE = 0) to prevent EEPROM corruption - confirmed in DS20005371E Section 1.1 and Figure 1-2.
Does the 47L04T-E/SN support 1 MHz I²C communication?
Yes, the 47L04T-E/SN fully supports 1 MHz I²C operation per DS20005371E Table 1-2 (FCLK max = 1000 kHz), with guaranteed timing margins for THIGH, TLOW, and TAA. This capability is enabled across its full 2.7–3.6 V VCC range and −40°C to +125°C temperature span - making it suitable for high-throughput host interfaces.
How does the Hardware Store (HS) pin work on the 47L04T-E/SN?
The HS pin on the 47L04T-E/SN initiates an immediate SRAM-to-EEPROM store upon receiving a high-going pulse ≥150 ns wide (DS20005371E Table 1-2, THSPW). It operates independently of VCAP, ASE setting, or power level - provided VCC remains above VTRIP (2.4 V). The EVENT bit in STATUS register is set post-store to indicate occurrence.
What is the meaning of the "T" in 47L04T-E/SN?
The "T" in 47L04T-E/SN denotes tape-and-reel packaging format per Microchip's part numbering convention. It indicates the device is supplied in EIA-481-compliant 13-inch reels (typically 3,300 units/reel), optimized for automated SMT assembly - distinct from tube-packaged variants like 47L04-I/SN.
Can the 47L04T-E/SN be used without connecting the A1 and A2 pins?
No - A1 and A2 pins on the 47L04T-E/SN must be hardwired to VSS or VCC to define the device's I²C address (DS20005371E Section 2.2). Leaving them floating causes undefined addressing behavior and bus contention. Valid combinations are A2:A1 = 00, 01, 10, or 11, allowing up to four 47L04T-E/SN devices on one I²C bus.
47L04T-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:
- 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:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
47L04T-E/SN FAQ
1.How can I place an order for 47L04T-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 47L04T-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 47L04T-E/SN reliable?
The price and inventory of 47L04T-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 47L04T-E/SN is usually 5 days.
3.What payment methods are accepted for 47L04T-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 47L04T-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 47L04T-E/SN?
47L04T-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 47L04T-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 47L04T-E/SN?
For technical support, including 47L04T-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 47L04T-E/SN requirements.
6.How does Aetrix verify that 47L04T-E/SN is sourced from the original manufacturer or authorized distributors?
All 47L04T-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 47L04T-E/SN meets industry standards.
7.What is the process for return or replacement of 47L04T-E/SN?
All 47L04T-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 47L04T-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 47L04T-E/SN part is unused and in its original packaging.
Return procedure for 47L04T-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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