My Inquiry
My Account
Microchip Technology AT24CS04-SSHM-T
- Part No.:
- AT24CS04-SSHM-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24CS04-SSHM-T.pdf
- Description:
- IC EEPROM 4KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:13,023
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT24CS04-SSHM-T from Microchip Technology is a 4-Kbit I²C-compatible serial EEPROM with factory-programmed 128-bit unique serial number, organized as 512 × 8 bits, operating from 1.7V to 5.5V across -40°C to +85°C, and featuring hardware write protection via WP pin for secure configuration storage in embedded systems.
For engineers reviewing the AT24CS04-SSHM-T datasheet, AT24CS04-SSHM-T pinout, AT24CS04-SSHM-T application, or AT24CS04-SSHM-T equivalent, this device supports I²C Fast Mode (400 kHz) and Fast Mode Plus (1 MHz at ≥2.5V), offers ultra-low standby current (≤6 μA), and delivers 1M write cycles with 100-year data retention - critical for firmware versioning, calibration data, and device identity management.
Technical Context
The AT24CS04-SSHM-T implements a two-wire I²C slave interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and internal pull-downs on A1/A2/WP pins. It uses a cascaded addressing scheme with A1 and A2 pins enabling up to four devices on one bus.
Its memory architecture comprises 32 pages of 16 bytes each, supporting byte-write, page-write (with partial-page capability), and random/sequential read modes. The 128-bit serial number resides in a dedicated, permanently locked read-only region outside the main 4-Kbit user array.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 4 Kbit (512 × 8), fully addressable user space independent of 128-bit serial number area |
| Supply voltage | 1.7V to 5.5V - enables direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level shifters |
| I²C speed modes | 100 kHz (Std), 400 kHz (Fast), 1 MHz (Fast Mode Plus at ≥2.5V) - supports scalable timing for legacy and high-throughput systems |
| Write endurance | 1,000,000 cycles - ensures reliable logging and parameter updates over product lifetime |
| Data retention | 100 years at 55°C - guarantees long-term integrity of calibration, licensing, or identity data |
| Standby current | ≤6 μA at 5.5V - minimizes power draw in always-on or battery-backed applications |
| Operating temperature | -40°C to +85°C industrial grade - validated for deployment in automotive control units and industrial PLCs |
Pinout & Package
AT24CS04-SSHM-T is housed in an 8-lead SOIC package (3.9 mm × 4.9 mm, 1.27 mm pitch), with pin 1 marked by a notch or dot. All pins are surface-mount compatible and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Device address input | Hard-wired to VCC/GND to set I²C slave address bit A1; enables up to four AT24CS04 devices on same bus |
| A2 | Device address input | Hard-wired to VCC/GND to set I²C slave address bit A2; combines with A1 for full 2-bit hardware addressing |
| GND | Ground reference | System ground connection; required for stable logic thresholds and ESD path |
| VCC | Power supply | 1.7–5.5V supply input; powers internal high-voltage generation for EEPROM writes |
| WP | Hardware write-protect | Active-high signal: tied to VCC to lock entire memory array against accidental writes |
| SCL | Serial clock input | Open-drain-compatible clock line; rising edge latches input data, falling edge outputs data |
| SDA | Serial data bidirectional | Open-drain I/O; requires external pull-up; supports multi-master bus sharing and wire-OR topology |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed 128-bit serial number | Permanently written during wafer test; globally unique across all CS-series EEPROMs; zero overhead on user memory |
| 16-byte page write with partial-page support | Reduces write latency vs. byte-write; allows efficient updates of sub-page data without erasing full page |
| Self-timed write cycle ≤5 ms | Eliminates need for external write timing control; host can poll ACK or use fixed delay before next access |
| Schmitt-triggered, filtered I/O | Rejects noise spikes <100 ns (Fast Mode) or <50 ns (Fast Mode Plus); improves robustness in electrically noisy environments |
| ESD protection >4 kV HBM | Meets IEC 61000-4-2 Level 2; reduces risk of field failure during handling or system integration |
Applications
| Asset Tracking Tag | Industrial Sensor Node |
|---|---|
|
Use Scenario: Embedded in battery-powered BLE tags used for real-time location tracking of tools or medical equipment. IC Role / Device Role / Timing Role: Stores unique device ID (from 128-bit serial number), last known coordinates, and firmware revision. Use Value: Enables unambiguous device identification and tamper-resistant firmware versioning without consuming user memory space. |
Use Scenario: Integrated into wireless temperature/humidity sensors deployed in factory-floor HVAC monitoring systems. IC Role / Device Role / Timing Role: Retains factory calibration coefficients, sensor offset values, and operational history logs. Use Value: Maintains measurement accuracy across 100-year data retention window, even after repeated power cycling. |
| Smart Meter Security Module | Automotive Body Control Unit |
|
Use Scenario: Used in utility smart meters to store cryptographic keys and meter serial numbers for regulatory compliance. IC Role / Device Role / Timing Role: Provides hardware-enforced write protection (via WP pin) and low-power nonvolatile storage for security-critical data. Use Value: Prevents unauthorized key modification during field operation while drawing ≤6 μA in standby - extending battery life. |
Use Scenario: Mounted on BCM PCBs to store seat position presets, mirror calibration, and lighting configuration profiles. IC Role / Device Role / Timing Role: Acts as persistent configuration memory accessible over vehicle I²C diagnostic bus. Use Value: Supports 1M+ write cycles to accommodate frequent user adjustments without wear-out concerns over 15-year vehicle life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24CS04-MAHM-T | Same 4-Kbit capacity and serial number feature, but in 8-pad UDFN (2 mm × 3 mm) package - 60% smaller footprint than SOIC | Preferred for space-constrained portable electronics; requires rework of solder stencil and layout | Select when board area is critical and UDFN assembly capability exists. |
| M24C04-RMN6TP | 4-Kbit I²C EEPROM without factory-programmed serial number; supports 1 MHz only above 2.5V; max standby current 1 μA (lower than AT24CS04) | Suitable for cost-sensitive designs where device uniqueness is handled externally; lacks built-in serialization | Choose if serial number is managed in MCU firmware and ultra-low standby current is prioritized over hardware identity. |
Compared with AT24CS04-MAHM-T, the AT24CS04-SSHM-T offers proven manufacturability in SOIC and simplified thermal management; versus M24C04-RMN6TP, it delivers guaranteed hardware-level device identity and broader voltage-range 1 MHz support - making it optimal for secure, production-ready embedded systems requiring traceability.
Availability
AT24CS04-SSHM-T is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, and smart meter security modules requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for AT24CS04-SSHM-T 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, FPGA, and memory solutions, with emphasis on reliability, longevity, and embedded system integration.
The AT24CS04-SSHM-T belongs to Microchip's CS-series Serial EEPROM family, designed specifically to eliminate manufacturing-line serialization steps by embedding guaranteed-unique identifiers alongside robust nonvolatile storage for industrial and automotive applications.
FAQ
What is the function of the WP pin on the AT24CS04-SSHM-T?
The WP (Write-Protect) pin on the AT24CS04-SSHM-T is an active-high hardware control that, when tied to VCC, disables all write operations to the entire memory array. When grounded, normal read/write functionality is enabled. Internally pulled down, it defaults to writable if left floating - though Microchip recommends hard-wiring for noise immunity. This feature ensures critical data in AT24CS04-SSHM-T remains immutable during system operation or fault conditions.
Does the AT24CS04-SSHM-T support 1 MHz I²C communication across its full voltage range?
No - the AT24CS04-SSHM-T supports 1 MHz (Fast Mode Plus) only at VCC ≥2.5V. At 1.7V–2.5V, maximum speed is 400 kHz (Fast Mode). This voltage-dependent timing is specified in the AC Characteristics table of the official datasheet. Designers must ensure supply voltage meets the minimum threshold for desired I²C speed when using AT24CS04-SSHM-T in high-throughput applications.
How is the 128-bit serial number accessed in the AT24CS04-SSHM-T?
The 128-bit serial number in the AT24CS04-SSHM-T resides in a dedicated, read-only memory region outside the main 4-Kbit user array. It is accessed via a specific I²C command sequence defined in Section 8.4 ("Serial Number Read") of the datasheet - requiring a separate device address and offset. The value is factory-programmed, permanent, and globally unique across all CS-series EEPROMs, making AT24CS04-SSHM-T ideal for secure device authentication without consuming user memory.
What package type does the AT24CS04-SSHM-T use, and is it lead-free?
The AT24CS04-SSHM-T uses an 8-lead SOIC package (3.9 mm × 4.9 mm, 1.27 mm pitch) with standard gull-wing leads. It is RoHS-compliant, halide-free, and lead-free per Microchip's green packaging standards - verified in the "Packages" section and "Packaging Information" (page 26) of DS20006350A. This makes AT24CS04-SSHM-T suitable for environmentally regulated industrial and automotive production.
Can multiple AT24CS04-SSHM-T devices share the same I²C bus?
Yes - up to four AT24CS04-SSHM-T devices can coexist on a single I²C bus using hardware address pins A1 and A2. Each pin can be tied to VCC or GND to configure a unique 2-bit address extension, yielding four distinct I²C slave addresses (0x50–0x53). This cascading capability eliminates address conflicts and simplifies multi-node designs - a core feature confirmed for AT24CS04-SSHM-T in Section 2.1 and Figure 3-1 of the datasheet.
AT24CS04-SSHM-T 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:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 4Kbit
- Memory Organization:
- 512 x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 550 ns
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24CS04-SSHM-T FAQ
1.How can I place an order for AT24CS04-SSHM-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24CS04-SSHM-T 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 AT24CS04-SSHM-T reliable?
The price and inventory of AT24CS04-SSHM-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24CS04-SSHM-T is usually 5 days.
3.What payment methods are accepted for AT24CS04-SSHM-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24CS04-SSHM-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24CS04-SSHM-T?
AT24CS04-SSHM-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24CS04-SSHM-T 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 AT24CS04-SSHM-T?
For technical support, including AT24CS04-SSHM-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24CS04-SSHM-T requirements.
6.How does Aetrix verify that AT24CS04-SSHM-T is sourced from the original manufacturer or authorized distributors?
All AT24CS04-SSHM-T 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 AT24CS04-SSHM-T meets industry standards.
7.What is the process for return or replacement of AT24CS04-SSHM-T?
All AT24CS04-SSHM-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24CS04-SSHM-T, 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 AT24CS04-SSHM-T part is unused and in its original packaging.
Return procedure for AT24CS04-SSHM-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24CS04-SSHM-T Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
