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NXP Semiconductors PCA24S08ADP,118
- Part No.:
- PCA24S08ADP,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
PCA24S08ADP,118.pdf
- Description:
- IC EEPROM 8KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,087
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Product details
Overview
The PCA24S08ADP,118 from NXP Semiconductors is a 1024 × 8-bit I²C-compatible serial EEPROM with programmable access protection, organized into eight 128-byte blocks and supporting byte/page write (up to 16 bytes), sequential/random read, and block- and page-level write protection. It operates from 2.5 V to 3.6 V and delivers 100,000 write cycles with 10-year data retention.
For engineers reviewing the PCA24S08ADP,118 datasheet, PCA24S08ADP,118 pinout, PCA24S08ADP,118 application, or PCA24S08ADP,118 equivalent, this device serves as a secure, low-power non-volatile memory solution for firmware storage, configuration parameter retention, and protected ID/credential storage in industrial control, automotive subsystems, and IoT edge nodes requiring tamper-aware memory partitioning.
Technical Context
The PCA24S08ADP,118 implements an I²C-bus interface with standard-mode (100 kHz) and fast-mode (400 kHz) support, featuring open-drain SDA/SCL pins and active-HIGH WP and active-LOW PROT inputs. Its internal architecture includes a dedicated Access Protection Page (APP) at addresses B8h/B9h, separate from main memory, storing sticky bits (SB), protection bits (PB), and block-0 page write enable bits (WPN).
Memory access enforces strict boundary handling: multi-byte reads wrap within blocks rather than crossing boundaries, and page writes require 16-byte alignment. Write operations are gated by WP = LOW and blocked entirely when PROT = LOW, which resets all sticky bits and holds the serial port in reset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8192 bits (1024 × 8-bit), organized as 8 blocks × 128 bytes |
| I²C clock frequency | 0 Hz to 400 kHz - supports both standard- and fast-mode I²C protocols |
| Supply voltage | 2.5 V to 3.6 V - compatible with 3.3 V logic systems without level shifting |
| Write endurance | 100,000 cycles per byte - ensures long-term reliability in frequent update scenarios |
| Data retention | 10 years minimum at −40 °C to +85 °C - validated for industrial temperature operation |
| Page write capacity | 16 bytes per page - enables efficient bulk configuration updates with single-command efficiency |
| ESD protection | 2000 V HBM, 200 V MM, 1000 V CDM - meets robustness requirements for board-level handling |
Pinout & Package
PCA24S08ADP,118 is packaged in TSSOP8 (SOT505-1): plastic thin shrink small outline package, 8 leads, body width 3.0 mm, lead pitch 0.65 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| n.c. | No-connect terminal | Pins 1 and 2 are internally unconnected - must be left floating or tied to ground per layout best practice |
| VDD | Positive supply rail | 2.5 V–3.6 V power input; decoupling capacitor required within 10 mm of pin |
| n.c. | No-connect terminal | Pin 3 is internally unconnected - no external connection permitted |
| WP | Active-HIGH write protect | When HIGH, disables all write operations to main memory, APP, and ID pages |
| PROT | Active-LOW protect reset | When LOW, resets all sticky bits (SBx, SBAP) and holds serial interface in reset |
| SCL | I²C serial clock input | Open-drain input; requires external pull-up to VDD; controls timing of all bus transactions |
| VSS | Ground reference | System ground return path; must be low-impedance and directly connected to PCB ground plane |
| SDA | I²C serial data I/O | Open-drain bidirectional line; shares pull-up with SCL; carries address, command, and data |
Key Features
| Feature | Design Value |
|---|---|
| Programmable block/page access protection | Enables hardware-enforced read/write permissions per block (PB0–PB7) and per page in Block 0 (WPN0–WPN7), preventing unauthorized firmware or credential modification |
| Dedicated Access Protection Page (APP) | Separate 16-byte EEPROM page (accessed via B8h/B9h) stores protection metadata - isolates security configuration from user data and prevents accidental overwrite |
| Sticky bit (SB) locking mechanism | Once cleared (SBx = 0), corresponding PBx or WPN fields become immutable until next power cycle - guarantees irreversible lockdown of critical memory regions |
| Coil-detect emulation | Provides DE/DC bits (Byte 10) for backward compatibility with AT24RF08C-based software stacks, returning "coil not detected" without RF hardware |
| Full-memory write protect | WP pin assertion blocks writes to all 8 kbits, APP registers, and ID page - provides system-level emergency lockout independent of software state |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing calibrated sensor offsets, actuator limits, and runtime counters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Non-volatile configuration register bank with block-level write protection to prevent field-update corruption during brown-out events. Use Value: Ensures deterministic startup behavior and eliminates recalibration after power loss, leveraging 10-year data retention and 100k-cycle endurance. | Use Scenario: Securing vehicle-specific calibration data, door lock patterns, and lighting profiles in BCMs subject to ESD and thermal cycling. IC Role / Device Role / Timing Role: Tamper-resistant parameter vault using sticky-bit-locked APP page to prevent unauthorized reprogramming of safety-critical settings. Use Value: Meets ISO 16750-4 ESD immunity requirements (2000 V HBM) and maintains integrity across −40 °C to +85 °C ambient range. |
| IoT Edge Node Identity Management | Medical Device Calibration Vault |
Use Scenario: Holding device unique identifiers (UID), TLS certificate fingerprints, and firmware signature keys in battery-powered wireless sensors. IC Role / Device Role / Timing Role: Secure credential store with page-level write protection on Block 0, where UID and keys reside, enforced via WPN bits and SB0. Use Value: Prevents key extraction or cloning attacks by making cryptographic material immutable post-provisioning, while allowing field-upgradable configuration in other blocks. | Use Scenario: Archiving factory-calibrated ADC gain/offset coefficients and sensor linearization tables in portable diagnostic equipment. IC Role / Device Role / Timing Role: High-reliability parameter archive with full-memory write protect (WP) enabled during clinical use to prevent accidental overwrites. Use Value: Guarantees measurement traceability and regulatory compliance (IEC 62304) through guaranteed 10-year data retention and JEDEC JESD78 latch-up immunity (>100 mA). |
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-T | Lacks access protection, APP page, sticky bits, and PROT pin; only basic 1024×8-bit I²C EEPROM | Suitable for cost-sensitive, non-security-critical applications without need for memory partitioning or write lockdown | Select when security features are unnecessary and legacy 24C08 pinout (A0–A2 on pins 1–3) is required |
| M95M01-RDW6TP/K | 1 Mbit SPI EEPROM (128k × 8); no I²C interface, no APP page, no sticky-bit locking | Used where higher density and SPI interface are preferred, but lacks hardware-enforced access control | Select for SPI-based designs needing >8 kbit capacity and faster random access, accepting absence of block-level protection |
Compared with AT24C08C-SSHM-T and M95M01-RDW6TP/K, the PCA24S08ADP,118 uniquely delivers hardware-enforced memory partitioning, irreversible sticky-bit locking, and dual-layer write protection (WP + PROT), making it the only option among the three suitable for applications requiring certified data integrity and anti-tamper configuration storage.
Availability
PCA24S08ADP,118 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, IoT edge node identity management, and medical device calibration vaults requiring stable component supply across extended product lifecycles.
Supply support for PCA24S08ADP,118 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
The PCA24S08ADP,118 belongs to NXP's secure serial EEPROM product line, designed specifically for applications demanding hardware-enforced memory access control, tamper resistance, and long-term data integrity in harsh operating environments.
FAQ
What is the primary function of the PROT pin on the PCA24S08ADP,118?
The PROT pin on the PCA24S08ADP,118 is an active-LOW protect reset input. When held LOW, it resets all sticky bits (SB0–SB7, SBAP) to logic 1 and places the serial interface in reset, disabling all I²C communication. This ensures deterministic initialization and prevents unintended access during power-up or fault conditions. The PCA24S08ADP,118 resumes normal operation only after PROT is brought HIGH, allowing controlled release of memory protection states.
How does the PCA24S08ADP,118 implement write protection beyond the WP pin?
Beyond the global WP pin, the PCA24S08ADP,118 implements hierarchical write protection via its Access Protection Page (APP). Each of the eight memory blocks has programmable protection bits (PBx) that control read/write access, and Block 0 supports individual 16-byte page write enables (WPN0–WPN7). Sticky bits (SBx) lock PBx/WPN configurations permanently until power cycle. The PCA24S08ADP,118 enforces these protections at the hardware level, rejecting illegal accesses with NACK responses.
Can the PCA24S08ADP,118 be used as a direct replacement for standard 24C08 EEPROMs?
The PCA24S08ADP,118 is pin-compatible with standard 24C08 devices in SO8 and TSSOP8 packages, but pins 1, 2, and 3 are no-connect instead of address inputs. Functionally, it extends 24C08 capability with access protection, APP page, and PROT pin. The PCA24S08ADP,118 operates identically for basic read/write commands but requires updated firmware to configure protection features and handle APP page addressing (B8h/B9h).
What is the purpose of the Access Protection Page (APP) in the PCA24S08ADP,118?
The Access Protection Page (APP) is a dedicated 16-byte EEPROM region (addressed via B8h/B9h) that stores protection metadata - including sticky bits (SBx), protection bits (PBx), block-0 page write enables (WPN), and coil-detect emulation bits. It is physically and logically isolated from main memory to prevent accidental overwrite. The PCA24S08ADP,118 uses this page to enforce hardware-level access control policies without consuming user data space.
Does the PCA24S08ADP,118 support multi-byte reads across block boundaries?
No, the PCA24S08ADP,118 does not support multi-byte reads across block boundaries. When a sequential read reaches the end of a 128-byte block, the internal address counter wraps to the start of that same block rather than advancing to the next block. This behavior is explicitly defined in Section 6.6 of the datasheet as an exception to standard 24C08 operation and ensures predictable memory access within protected partitions. The PCA24S08ADP,118 enforces this boundary strictly in hardware.
PCA24S08ADP,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 400 kHz
- Write Cycle Time - Word, Page:
- -
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
PCA24S08ADP,118 FAQ
1.How can I place an order for PCA24S08ADP,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA24S08ADP,118 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 PCA24S08ADP,118 reliable?
The price and inventory of PCA24S08ADP,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA24S08ADP,118 is usually 5 days.
3.What payment methods are accepted for PCA24S08ADP,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA24S08ADP,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA24S08ADP,118?
PCA24S08ADP,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA24S08ADP,118 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 PCA24S08ADP,118?
For technical support, including PCA24S08ADP,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA24S08ADP,118 requirements.
6.How does Aetrix verify that PCA24S08ADP,118 is sourced from the original manufacturer or authorized distributors?
All PCA24S08ADP,118 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 PCA24S08ADP,118 meets industry standards.
7.What is the process for return or replacement of PCA24S08ADP,118?
All PCA24S08ADP,118 units undergo pre-shipment inspection (PSI). If there is an issue with PCA24S08ADP,118, 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 PCA24S08ADP,118 part is unused and in its original packaging.
Return procedure for PCA24S08ADP,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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