My Inquiry
My Account
Microchip Technology AT24C08C-SSHM-B
- Part No.:
- AT24C08C-SSHM-B
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C08C-SSHM-B.pdf
- Description:
- IC EEPROM 8KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,941
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT24C08C-SSHM-B from Microchip Technology is an 8-Kbit (1,024 × 8) I²C-compatible serial EEPROM in 8-lead SOIC package, operating from 1.7V to 5.5V with industrial temperature range (–40°C to +85°C), 1 MHz Fast Mode Plus support at ≥2.5V, and hardware write protection via WP pin - used for nonvolatile configuration storage in embedded controllers and power management systems.
For engineers reviewing the AT24C08C-SSHM-B datasheet, AT24C08C-SSHM-B pinout, AT24C08C-SSHM-B application, or AT24C08C-SSHM-B equivalent, key selection considerations include I²C bus voltage compatibility (1.7–5.5V), page-write timing (≤5 ms), standby current (≤6 μA), and hardware addressability (A2 only, A1 NC) for multi-device bus design.
Technical Context
The AT24C08C-SSHM-B implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and open-drain SDA output requiring external pull-up. It supports Standard (100 kHz), Fast (400 kHz), and Fast Mode Plus (1 MHz) speeds depending on VCC level - 1 MHz only above 2.5V.
Internally organized as 64 pages of 16 bytes each, it uses a hardware-based device addressing scheme with A2 as the sole configurable address input (A1 is no-connect), enabling up to two devices on one bus. Write protection is controlled by the WP pin: tied to VCC disables all writes; tied to GND enables full-array writes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1,024 × 8 bits), sufficient for firmware configuration, calibration data, or device ID storage |
| Interface | I²C two-wire serial, compatible with standard microcontroller I²C peripherals without protocol translation |
| Voltage range | 1.7V to 5.5V supply - supports direct interfacing with 1.8V, 3.3V, and 5V logic domains |
| Write endurance | 1,000,000 cycles - suitable for frequent parameter updates in field-deployed equipment |
| Data retention | 100 years at 55°C - ensures long-term reliability in industrial environments |
| Standby current | Max 6 μA at 5.5V - minimizes quiescent power in battery-backed or energy-sensitive systems |
| Write cycle time | ≤5 ms self-timed - eliminates need for polling delay in host firmware beyond ACK polling |
Pinout & Package
AT24C08C-SSHM-B is supplied in an 8-lead SOIC (Small Outline Integrated Circuit) package with gull-wing leads, JEDEC MS-012AC compliant, body width 3.9 mm, lead pitch 1.27 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | No-connect (NC) | Not bonded internally on AT24C08C; must be left unconnected or tied to GND/VCC - no functional impact |
| A2 | Device address input | Hardwired to GND or VCC to select one of two possible I²C addresses (10100xxB or 10101xxB) |
| GND | Ground reference | System return path for VCC and signal logic; must be low-impedance connection |
| SDA | Serial data bidirectional I/O | Open-drain output/input; requires external pull-up resistor (≤10 kΩ); shared across I²C bus |
| SCL | Serial clock input | Input-only clock line; rising edge latches data, falling edge outputs data; pulled high externally |
| WP | Write-protect control | Active-high hardware lock: VCC disables all writes, GND enables full-array writes |
| VCC | Power supply | 1.7–5.5V supply input; must ramp monotonically at ≤0.1 V/µs during power-up |
Key Features
| Feature | Design Value |
|---|---|
| Fast Mode Plus support | 1 MHz operation at 2.5–5.5V enables faster configuration loading vs. legacy 100 kHz EEPROMs |
| Hardware write protection | WP pin provides tamper-resistant, zero-software-overhead memory lockdown during system runtime |
| Ultra-low standby current | 6 μA max at 5.5V allows integration into always-on subsystems without measurable battery drain |
| Page write capability | 16-byte page writes reduce I²C transaction count vs. byte-by-byte writes - improves update efficiency |
| No-connect A1 simplification | Eliminates external address pin routing complexity compared to AT24C04C - reduces PCB layout overhead |
Applications
| Industrial Sensor Calibration Storage | Smart Meter Firmware Parameter Backup |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and temperature compensation tables in programmable logic controllers and RTUs. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent calibration data accessed at boot and during field recalibration. Use Value: Enables traceable, field-updatable calibration without requiring reprogramming of main MCU flash - maintains accuracy over 100-year data retention. | Use Scenario: Retaining tariff schedules, metering constants, and security keys in utility-grade electricity/water meters operating for >15 years. IC Role / Device Role / Timing Role: Secure, WP-protected backup storage for critical operational parameters updated infrequently but essential for billing integrity. Use Value: Hardware write protection prevents accidental or malicious overwrite; 1M write cycles support lifetime field updates without wear-out. |
| Embedded Controller Boot Configuration | IoT Edge Device Identity Management |
Use Scenario: Holding board-specific settings (e.g., CAN node ID, UART baud rate, GPIO defaults) in industrial HMIs and gateway controllers. IC Role / Device Role / Timing Role: I²C-configurable startup register mapped directly by bootloader before OS initialization. Use Value: Eliminates hard-coded configuration in firmware; allows single binary deployment across SKUs with variant-specific EEPROM contents. | Use Scenario: Storing unique device identifiers (UID), X.509 certificate fingerprints, and secure boot seeds in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Tamper-resistant identity anchor referenced during TLS handshake and firmware signature verification. Use Value: WP pin ensures cryptographic material remains immutable post-provisioning; low 6 μA standby extends 10-year battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C08D-SSHM-T | Same 8-Kbit capacity and SOIC-8 package; newer revision with enhanced ESD (>6 kV HBM) and tighter tWR spec (typ 3 ms) | Preferred for new designs requiring higher robustness in noisy industrial environments | Select AT24C08D-SSHM-T if ESD immunity >4 kV and faster write timing are required; not drop-in due to revised AC specs |
| M24C08-RMN6TP | 8-Kbit I²C EEPROM in same SOIC-8 package; supports 1 MHz only at 5V (not 2.5V), max ICC2 = 3.5 mA (vs. 3.0 mA) | Suitable where 5V-only operation is acceptable and slightly higher active current is tolerable | Choose M24C08-RMN6TP for cost-sensitive 5V systems; verify tLOW/tHIGH compliance at 1 MHz under actual VCC conditions |
Compared with AT24C08C-SSHM-B, AT24C08D-SSHM-T offers improved ESD and write speed but requires validation of timing margins, while M24C08-RMN6TP trades broader voltage-range FM+ support for lower unit cost in fixed 5V applications.
Availability
AT24C08C-SSHM-B is available at Aetrix Electronics and suitable for industrial sensor nodes, smart metering infrastructure, and embedded controller boot configuration requiring stable component supply, long-lifecycle availability, and RoHS-compliant green packaging.
Supply support for AT24C08C-SSHM-B 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 industrial, automotive, and aerospace reliability.
The AT24C08C belongs to Microchip's serial EEPROM product line, designed specifically for low-voltage, low-power nonvolatile data storage in space-constrained embedded systems with stringent longevity requirements.
FAQ
What is the maximum I²C clock frequency supported by AT24C08C-SSHM-B?
AT24C08C-SSHM-B supports 100 kHz (Standard Mode), 400 kHz (Fast Mode), and 1 MHz (Fast Mode Plus). The 1 MHz mode requires VCC ≥2.5V; below that, maximum is 400 kHz. All modes operate across the full 1.7–5.5V supply range, with timing parameters validated per DS20006127B Table 4-3.
Does AT24C08C-SSHM-B require external pull-up resistors on SDA and SCL lines?
Yes, AT24C08C-SSHM-B requires external pull-up resistors on both SDA and SCL. SDA is open-drain and must be pulled up (≤10 kΩ recommended); SCL is an input that may be driven or pulled up. Pull-up values depend on bus capacitance and target speed - e.g., 4 kΩ for 400 kHz, 1.3 kΩ for 1 MHz per datasheet Section 4.4.
How many AT24C08C-SSHM-B devices can share the same I²C bus?
Up to two AT24C08C-SSHM-B devices can share one I²C bus. This is because only the A2 pin is functional for hardware addressing (A1 is NC), providing two unique device addresses (10100xxB and 10101xxB) when A2 is tied to GND or VCC respectively.
What happens when the WP pin on AT24C08C-SSHM-B is left floating?
When the WP pin on AT24C08C-SSHM-B is left floating, it is internally pulled down to GND, enabling normal write operations. However, Microchip recommends tying WP to a defined logic level (GND or VCC) due to potential capacitive coupling noise in real systems - floating pins may cause intermittent write-enable behavior.
Is AT24C08C-SSHM-B compatible with 1.8V I²C systems?
Yes, AT24C08C-SSHM-B is fully compatible with 1.8V I²C systems. It operates down to 1.7V VCC and supports Standard (100 kHz) and Fast (400 kHz) modes across 1.7–5.5V. For 1.8V operation, ensure external pull-ups are sized appropriately (e.g., ≤10 kΩ) and that host I²C pins meet AT24C08C-SSHM-B's VIH/VIL thresholds (VIH ≥1.26V, VIL ≤0.54V at 1.8V).
AT24C08C-SSHM-B 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:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 8Kbit
- Memory Organization:
- 1K 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
AT24C08C-SSHM-B FAQ
1.How can I place an order for AT24C08C-SSHM-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C08C-SSHM-B 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 AT24C08C-SSHM-B reliable?
The price and inventory of AT24C08C-SSHM-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C08C-SSHM-B is usually 5 days.
3.What payment methods are accepted for AT24C08C-SSHM-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C08C-SSHM-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C08C-SSHM-B?
AT24C08C-SSHM-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C08C-SSHM-B 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 AT24C08C-SSHM-B?
For technical support, including AT24C08C-SSHM-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C08C-SSHM-B requirements.
6.How does Aetrix verify that AT24C08C-SSHM-B is sourced from the original manufacturer or authorized distributors?
All AT24C08C-SSHM-B 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 AT24C08C-SSHM-B meets industry standards.
7.What is the process for return or replacement of AT24C08C-SSHM-B?
All AT24C08C-SSHM-B units undergo pre-shipment inspection (PSI). If there is an issue with AT24C08C-SSHM-B, 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 AT24C08C-SSHM-B part is unused and in its original packaging.
Return procedure for AT24C08C-SSHM-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24C08C-SSHM-B 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…
