Engineering Category: Standard Contact IC Card
Contact Memory Card (EEPROM)
AT24C / FM24C Compatible · ISO 7816 Contact Interface
A cost-effective contact memory card for simple, non-secure data storage — reliable read/write performance and easy integration with legacy or fixed-terminal systems.
- 🪪Reliable Contact
Read / Write - 🔁Rewritable
EEPROM Memory - ⚙️Cost-Effective for
Legacy Systems - 🛡️Durable for
Daily Use
What Is a Contact Memory Card?
A contact memory card is the simplest type of contact IC card: a plain EEPROM chip in a standard ISO/IEC 7816 card body, used purely to store and rewrite small amounts of data. Unlike logic-encryption or CPU cards, a contact memory card has no password and no processor — which keeps it the lowest-cost option for high-volume, non-secure applications.
Our memory cards are built on the AT24C series and on China-made FM24C (Fudan) and GT24C (Giantec) equivalents, so they drop straight into existing readers and personalization lines. Capacity ranges from 128 bytes to 64 KB depending on the part. For the full international ↔ China chip mapping, see the chip selection & cross-reference table below.
Where EEPROM Memory Cards Fit Best
- Low-cost ID and record cards for libraries, warehouses, visitors and service teams
- Replacing magnetic-stripe or paper records in controlled, insert-to-read environments
- Fixed-terminal systems where cards are read deliberately, not over the air
- High-volume programs where per-card cost matters more than on-card security
- Storing simple structured data — IDs, counters, status flags and small record sets
Why Choose CedaGlo Memory Cards
For Legacy System Upgrades
Reuse or adapt existing contact-card infrastructure more easily than moving to complex new platforms.
For Controlled Environments
Best for desks, kiosks, terminals and service points where cards are inserted deliberately.
For Budget-Sensitive Projects
Lower total cost than most secure or contactless solutions, ideal for high-volume rollouts.
For Simple Structured Data
Enough memory for IDs, counters, status flags and small record sets — no over-engineering.
Key Features
- Physical contact interface for consistent read/write in controlled terminals
- Standard ISO/IEC 7816 contact pads, broad reader support
- I²C-protocol EEPROM, simple and proven
- Entry-level chip — the most economical contact IC option
- Ideal for high-volume, budget-sensitive card programs
- Replaces magnetic-stripe or paper records affordably
- AT24C-compatible — drop-in with existing readers
- Works with legacy and fixed-terminal systems
- China-made FM24C / GT24C as direct alternatives
Technical Specifications
| Memory Type | EEPROM Memory Card | Write Endurance | ≥ 100,000 cycles |
| Memory Capacity | 128 B – 64 KB (model-dependent) | Data Retention | ≥ 10 years |
| Chip Compatibility | AT24C series ↔ FM24C / GT24C | Operating Temperature | 0 °C to 70 °C |
| Interface | ISO/IEC 7816 contact (I²C) | Card Size | CR80, 85.60 × 53.98 mm |
| Security | None (plain storage, no password) | Thickness | 0.76 mm |
| Protocol | I²C serial | Material | PVC / PET / ABS optional |
| Standard | ISO/IEC 7816 | Finish Options | Glossy / Matte / Frosted |
Volume Pricing
| Quantity | Unit Price (USD / pc) |
|---|---|
| 100 – 499 pcs | From US$0.26 |
| 500 – 999 pcs | From US$0.25 |
| 1,000 – 1,999 pcs | From US$0.22 |
| 2,000+ pcs | Contact us for volume pricing |
Typical specification for an AT24C-type contact memory card. Final price depends on chip capacity, card material, printing and order quantity — contact us for an exact quote. Custom materials and personalization options are available.
Contact Card Chip Selection & Cross-Reference
Full reference of contact & dual-interface IC card chips we supply, with international ↔ China cross-references. This Basic Data Storage Card belongs to the Memory Card row (highlighted). Memory and logic-encryption China parts are pin- and command-compatible drop-in replacements; CPU cards are functional equivalents.
| Category | Brand | Origin | Part Numbers | Interface | Cross-Reference (Intl. ↔ China) |
|---|---|---|---|---|---|
| Memory | Microchip (ex-Atmel) | US | AT24C01 / AT24C02 / AT24C04 / AT24C08 / AT24C16 / AT24C32 / AT24C64 / AT24C128 / AT24C256 / AT24C512 | Contact | ↔ FM24C / GT24C |
| Memory | STMicroelectronics | EU | M24C01 / M24C02 / M24C04 / M24C08 / M24C16 / M24C32 / M24C64 | Contact | — |
| Memory | onsemi | US | CAT24C01 / CAT24C02 / CAT24C04 / CAT24C16 / CAT24C32 / CAT24C64 / CAT24C128 / CAT24C256 / CAT24C512 | Contact | — |
| Memory | Fudan / FMSH | CN | FM24C01 / FM24C02 / FM24C04 / FM24C08 / FM24C16 / FM24C32 / FM24C64 / FM24C128 / FM24C256 | Contact | ↔ Microchip AT24C (pin-compatible) |
| Memory | Giantec | CN | GT24C01 / GT24C02 / GT24C04 / GT24C08 / GT24C16 / GT24C32 / GT24C64 / GT24C128 / GT24C256 / GT24C512 | Contact | ↔ Microchip AT24C (pin-compatible) |
| Logic-Encryption | Infineon | EU | SLE4406 / SLE5536 | Contact | ↔ Fudan FM4406 |
| Logic-Encryption | Infineon | EU | SLE4418 / SLE5518 | Contact | ↔ Fudan FM4418 |
| Logic-Encryption | Infineon | EU | SLE4428 / SLE5528 | Contact | ↔ Fudan FM4428 / FM5528 |
| Logic-Encryption | Infineon | EU | SLE4432 / SLE5532 | Contact | ↔ Fudan FM4432 |
| Logic-Encryption | Infineon | EU | SLE4442 / SLE5542 | Contact | ↔ Fudan FM4442 / FM5542 |
| Logic-Encryption | Microchip | US | AT88SC0104C / 0204C / 0404C / 0808C / 1616C / 3216C / 6416C / 12816C / 25616C (CryptoMemory) | Contact | — |
| Logic-Encryption | Fudan / FMSH | CN | FM4406 / FM4418 / FM4428 / FM4432 / FM4442 / FM5528 / FM5542 | Contact | ↔ Infineon SLE44xx / SLE55xx |
| CPU | Infineon | EU | SLE78CF1M0P / SLE78CF1M2P (contact) · SLE78CLFX40xxP (dual) | Contact / Dual | — |
| CPU | NXP | EU | P60D024 / P60D080 / P60D144 / P60D145 (SmartMX2) · P71D321 / P71D352 (SmartMX3) | Dual | — |
| CPU | STMicroelectronics | EU | ST33J2M0 / ST33G1M2 / ST33K1M5 (ARM SecurCore) | Contact / Dual | — |
| CPU | Fudan / FMSH | CN | FM1216 / FM1232 / FM1280 | Contact / Dual | ↔ Infineon / NXP / ST |
| CPU | Huada / HED | CN | CIU98328F / CIU98428F (contact) · CIU9872B / CIU9872B_01 (dual) · CIU98M50 (SIM) | Contact / Dual | ↔ Infineon / NXP / ST |
| CPU | Unigroup Tongxin | CN | THD86 / THD88 / THD89 · THC20F08AD / THC80F09 (SIM) | Contact / Dual | ↔ Infineon / NXP / ST |
| CPU | Datang | CN | DMT-CFN2HG6 (contact) · DMT-CBS-CE3D (dual) | Contact / Dual | ↔ Infineon / NXP / ST |
China CPU cards embed international algorithms (DES/3DES/RSA/ECC/AES) plus Chinese SM1/SM2/SM3/SM4. Product-level payment & ID certifications are handled per project. Part availability and exact specs — contact us before design-in.
Best-Fit Applications
Library Borrower Card
- Stores member ID and basic borrowing data
- Fits fixed library readers and low-cost upgrades
Warehouse Record Card
- Records batch, operator or stock-movement data
- Reliable in fixed-terminal warehouse readers
Visitor Information Card
- Holds temporary visitor data, easily rewritten
- Low-cost choice for check-in and registration
Device / Service Record Card
- Stores device ID and maintenance records
- Suits industrial tools and service terminals
Frequently Asked Questions
What is the memory capacity of a contact memory card?
Capacity ranges from 128 bytes (AT24C01) up to 64 KB (AT24C512), selected by part number. These are EEPROM chips with ≥10 years data retention and ≥100,000 write cycles, accessed over the ISO/IEC 7816 contact interface using the I²C protocol.
Are your memory cards compatible with Atmel / Microchip AT24C chips?
Yes. We build them on the AT24C series and on China-made FM24C (Fudan) and GT24C (Giantec) equivalents. They are pin- and I²C-protocol compatible, so they work as drop-in replacements in existing readers and personalization lines.
What are contact memory cards typically used for?
They suit non-sensitive data such as library member IDs, warehouse records, visitor registration, and device or service logs. The card acts as a simple readable carrier, while access rights and valuable data stay in your back-end system.
Do memory cards offer password protection or encryption?
No. A plain memory card has no password or anti-tamper logic. If you need password protection, choose a logic-encryption card such as SLE4442 or FM4442; for cryptographic processing and high security, choose a CPU card. We can advise the right type for your project.
Related Products
Prepaid Utility Meter Cards
Password-protected SLE4442 card for water, electricity & gas meters.
View Details
Access Control & Campus Cards
Secure-logic SLE4428 card for building access and campus systems.
View Details
Financial / Payment Cards
High-security contact CPU card for banking and payment.
View Details
Social-Security / eHealth / eID Cards
Large-capacity CPU card for government ID and eHealth.
View DetailsLooking for a practical card for small-data applications?
We support card printing, numbering, chip personalization and project-based customization. Tell us your capacity, quantity and finish — we'll quote fast.