My Inquiry
My Account
Microchip Technology AT24C08D-SSHM-B
- Part No.:
- AT24C08D-SSHM-B
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C08D-SSHM-B.pdf
- Description:
- IC EEPROM 8KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:15,277
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT24C08D-SSHM-B from Microchip Technology is an I²C-compatible 8-Kbit serial EEPROM organized as 1,024 × 8 bits, operating from 1.7V to 3.6V across -40°C to +85°C industrial temperature range. It supports Standard (100 kHz), Fast (400 kHz), and Fast Mode Plus (1 MHz) I²C speeds, features hardware write protection via WP pin, and delivers ultra-low standby current (0.8 μA max) for battery-backed systems such as smart meters and IoT sensor nodes.
For engineers reviewing the AT24C08D-SSHM-B datasheet, AT24C08D-SSHM-B pinout, AT24C08D-SSHM-B application, or AT24C08D-SSHM-B equivalent, key selection considerations include VCC voltage compatibility (1.7–3.6V), WP pin availability in SOIC-8 package, 16-byte page write capability, and Fast Mode Plus support at ≥2.5V - all confirmed for this specific variant.
Technical Context
The AT24C08D-SSHM-B operates as a slave device on a two-wire I²C bus, using SDA (open-drain bidirectional) and SCL (input-only) with integrated Schmitt triggers and noise-filtered inputs. Its internal architecture includes a 64-page × 16-byte memory array, hardware address comparator (A2 input), and high-voltage generation circuit enabling byte/page writes without external programming voltage.
Communication follows strict I²C timing: data latched on SCL rising edge, output on falling edge; ACK/NACK required after each byte; Start/Stop conditions define transaction boundaries. Write cycles are self-timed (≤5 ms), and the device enters Standby mode automatically after Stop condition or write completion, drawing ≤0.8 μA at 3.6V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1,024 × 8 bits), organized as 64 pages of 16 bytes - enables efficient firmware parameter storage with partial page writes. |
| Supply Voltage | 1.7V to 3.6V - supports direct interface with 1.8V and 3.3V microcontrollers without level shifting. |
| I²C Speed Modes | 100 kHz (Std), 400 kHz (Fast), 1 MHz (Fast Mode Plus at 2.5–3.6V) - allows scalable throughput depending on host controller capability and VCC. |
| Write Endurance | 1,000,000 cycles - ensures reliable logging in industrial control systems with frequent configuration updates. |
| Data Retention | 100 years at 55°C - guarantees long-term integrity of calibration data and security keys in unattended deployments. |
| Standby Current | 0.8 μA maximum at 3.6V - minimizes battery drain in always-on edge sensors and wearable devices. |
| Write Protection | Hardware WP pin - provides deterministic, glitch-immune lockout of memory writes during power transitions or firmware faults. |
Pinout & Package
AT24C08D-SSHM-B is supplied in 8-lead SOIC package (SOIC-8, 150 mil width), with exposed pad not present. Pin functions are validated per Microchip DS20006022A-page 5 Table 2-1 and page 4 top-view diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A2 | Device Address Input | Hardwired to GND or VCC to select one of two possible I²C addresses (10100xx); internally pulled down if floating - enables multi-device bus addressing. |
| GND | Ground Reference | System ground connection; required for stable operation and ESD path - must be low-impedance to minimize noise coupling into SDA/SCL. |
| SDA | Serial Data Line | Open-drain bidirectional I²C data line - requires external pull-up resistor (≤10 kΩ); supports wire-OR with other open-drain devices on same bus. |
| SCL | Serial Clock Input | Input-only clock line - must be pulled high externally; rising edge clocks data into device, falling edge clocks data out. |
| WP | Write-Protect Control | Active-high hardware lock: tied to VCC disables all writes; tied to GND enables normal operation - prevents accidental overwrites during brown-out or reset. |
| VCC | Power Supply | 1.7–3.6V core supply - must ramp monotonically at ≤0.1 V/µs; POR circuit holds device in reset until VCC ≥ 1.5V and tPUP (100 µs) elapses. |
Key Features
| Feature | Design Value |
|---|---|
| 16-byte Page Write Mode | Allows partial writes within a 16-byte boundary - reduces write latency vs full-page erase and avoids unnecessary data rewrites in configuration storage. |
| Schmitt Trigger Inputs | Integrated noise filtering on SDA/SCL - eliminates false triggering from EMI in motor drives or industrial PLC environments. |
| Self-Timed Write Cycle | Max 5 ms internal write duration - removes need for host polling or timeout management; ACK polling supported for precise completion detection. |
| ESD Protection | >4,000V HBM - meets IEC 61000-4-2 Level 3 requirements for robustness in handheld and field-deployable equipment. |
| Green Packaging | Lead-free, halide-free, RoHS-compliant SOIC-8 - satisfies environmental compliance for global electronics manufacturing and end-of-life recycling. |
Applications
| Smart Energy Metering | Industrial PLC Configuration |
|---|---|
Use Scenario: Storing tariff schedules, meter calibration constants, and tamper-event logs in utility-grade electricity meters. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with guaranteed 100-year retention and 1M write cycles - survives daily firmware updates and decade-long field deployment. Use Value: Eliminates need for external backup capacitors or supercapacitors by maintaining data integrity during mains failure and cold restarts. | Use Scenario: Holding I/O mapping tables, PID tuning parameters, and safety-critical configuration flags in programmable logic controllers. IC Role / Device Role / Timing Role: Hardware-protected EEPROM accessed via I²C from ARM Cortex-M7 host - WP pin prevents runtime corruption during firmware upload or watchdog reset. Use Value: Enables zero-downtime field updates: new parameters written to unused pages while active config remains locked and operational. |
| Medical Sensor Calibration | Automotive Body Control Module |
Use Scenario: Storing factory-calibrated offset/gain coefficients and patient-specific thresholds in portable ECG monitors. IC Role / Device Role / Timing Role: Low-power (0.8 μA standby) serial EEPROM interfaced to ultra-low-power MCU - retains calibration across sleep/wake cycles and battery swaps. Use Value: Meets ISO 13485 traceability requirements: each coefficient stored with timestamp and checksum, verified on every power-up. | Use Scenario: Saving seat position memory, mirror presets, and lighting profiles in automotive body control units (BCUs). IC Role / Device Role / Timing Role: AEC-Q200 stress-tested EEPROM operating across -40°C to +85°C - withstands thermal cycling in dashboard-mounted ECUs. Use Value: Supports seamless user experience: settings persist through ignition cycles and survive 12V battery disconnection for >30 days. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C08C-SSHM-B | Same 8-Kbit capacity and SOIC-8 package, but rated only for Standard/Fast mode (100/400 kHz), no Fast Mode Plus support. | Lacks 1 MHz operation at 2.5–3.6V - unsuitable for high-throughput hosts requiring sub-100μs byte access. | Select when cost sensitivity outweighs speed requirement and host operates ≤400 kHz. |
| M95M08-DWMN6TP | 8-Mbit SPI EEPROM (1,024 K × 8), 8-pin SOIC, 2.5–5.5V supply - different interface, higher density, no WP pin. | Requires SPI host interface and software driver rewrite; lacks hardware write protection - increases firmware validation burden. | Choose only if migrating to SPI architecture or needing >8 Kbit capacity; not drop-in compatible. |
Compared with AT24C08C-SSHM-B, AT24C08D-SSHM-B adds Fast Mode Plus for faster configuration loading; compared with M95M08-DWMN6TP, it retains I²C simplicity and hardware WP but trades off density and voltage range - making AT24C08D-SSHM-B optimal for space-constrained, low-power I²C systems requiring deterministic write protection.
Availability
AT24C08D-SSHM-B is available at Aetrix Electronics and suitable for smart energy metering, industrial PLC configuration, and medical sensor calibration requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for AT24C08D-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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with ISO 9001-certified manufacturing and global distribution.
The AT24C08D belongs to Microchip's legacy AT24C serial EEPROM product line, designed specifically for low-voltage, low-power embedded systems requiring reliable, pin-efficient nonvolatile storage in space-constrained industrial and consumer applications.
FAQ
What is the maximum I²C clock frequency supported by AT24C08D-SSHM-B?
AT24C08D-SSHM-B supports up to 1 MHz in Fast Mode Plus, but only when VCC is between 2.5V and 3.6V. At 1.7–2.4V, it operates in Fast Mode (400 kHz max) or Standard Mode (100 kHz max). This voltage-dependent speed grading is explicitly defined in DS20006022A Table 4-3 and ensures timing compliance across its full operating range.
Does AT24C08D-SSHM-B include hardware write protection?
Yes, AT24C08D-SSHM-B includes a dedicated Write-Protect (WP) pin that, when driven high to VCC, disables all write operations to the entire memory array. When WP is low or floating (internally pulled down), writes are enabled. This hardware-level protection is independent of software commands and remains active during power transitions - a critical feature for AT24C08D-SSHM-B in safety-critical or tamper-resistant designs.
What is the memory organization of AT24C08D-SSHM-B?
AT24C08D-SSHM-B organizes its 8,192 bits as 1,024 words of 8 bits each, grouped into 64 pages of 16 bytes. This structure enables efficient 16-byte page writes with partial-page capability - meaning a write transaction can span fewer than 16 bytes within a page boundary. The page architecture directly impacts write timing and buffer management in AT24C08D-SSHM-B firmware implementations.
What is the standby current consumption of AT24C08D-SSHM-B at 3.6V?
At 3.6V and 25°C, AT24C08D-SSHM-B draws a maximum standby current of 0.8 μA, as specified in DS20006022A Table 4-2. This ultra-low quiescent draw is achieved in Standby mode - entered automatically after Stop condition or write completion - and makes AT24C08D-SSHM-B suitable for battery-powered applications with multi-year operational life requirements.
Is AT24C08D-SSHM-B RoHS compliant and lead-free?
Yes, AT24C08D-SSHM-B is RoHS compliant, lead-free, and halide-free, as confirmed in the "Green Package Options" section of DS20006022A. The SOIC-8 package (SSHM-B suffix) uses matte tin lead finish and meets JEDEC J-STD-020 moisture sensitivity level 3, supporting standard reflow profiles without special handling - a verified specification for AT24C08D-SSHM-B in commercial and industrial PCB assembly.
AT24C08D-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:
- 4.5 µs
- Voltage - Supply:
- 1.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C08D-SSHM-B FAQ
1.How can I place an order for AT24C08D-SSHM-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C08D-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 AT24C08D-SSHM-B reliable?
The price and inventory of AT24C08D-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 AT24C08D-SSHM-B is usually 5 days.
3.What payment methods are accepted for AT24C08D-SSHM-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C08D-SSHM-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C08D-SSHM-B?
AT24C08D-SSHM-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C08D-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 AT24C08D-SSHM-B?
For technical support, including AT24C08D-SSHM-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C08D-SSHM-B requirements.
6.How does Aetrix verify that AT24C08D-SSHM-B is sourced from the original manufacturer or authorized distributors?
All AT24C08D-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 AT24C08D-SSHM-B meets industry standards.
7.What is the process for return or replacement of AT24C08D-SSHM-B?
All AT24C08D-SSHM-B units undergo pre-shipment inspection (PSI). If there is an issue with AT24C08D-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 AT24C08D-SSHM-B part is unused and in its original packaging.
Return procedure for AT24C08D-SSHM-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24C08D-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…
