RW1990 Rewritable iButton RFID Touch Memory Keys – 5-Pack

Upgrade your access control system with these RW1990 Rewritable RFID Touch Memory Keys. Compatible with DS1990A and TM1990A iButton readers, each key carries a unique 64-bit digital identification code stored in non-volatile internal memory — ensuring rock-solid reliability every single touch. Crafted from durable stainless steel, these compact fobs are built to last and easy to carry on any keyring.

Key Features

Fully Rewritable: Re-program the key as many times as needed — ideal for dynamic access control environments.
Unique 64-Bit Registration Number: Each key holds an exclusive digital identifier for secure, individual identification.
DS1990A & TM1990A Compatible: Works seamlessly with standard iButton and 1-Wire network readers.
Built-In Multidrop Controller: Supports 1-Wire Net architecture for straightforward integration into existing systems.
Instant Digital Identification: Momentary contact with a compatible reader delivers instant, reliable recognition.
High-Quality CMOS Microcircuit: Premium imported RW1990 chip ensures consistent, dependable performance.
Durable Stainless Steel Housing: Resistant to everyday wear, moisture, and corrosion — low maintenance and long-lasting.
6 Color Options Available: Choose a color to suit your preference or to easily distinguish between multiple keys.

Technical Specifications

Model: RW1990
Compatibility: DS1990A, TM1990A iButton systems, 1-Wire Net
Memory: 64-bit unique registration code, non-volatile storage
Material: Stainless steel
Quantity: 5 keys per lot
Colors: 6 options available

What's in the Box?

5 × RW1990 Rewritable iButton Touch Memory Keys

Perfect For

Residential and commercial door access systems
Building entry and intercom systems using iButton technology
Replacing or duplicating existing iButton keys
IT and security professionals managing 1-Wire networks

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Frequently Asked Questions

Q: What is the RW1990 iButton RFID Touch Memory Key used for?

A: The RW1990 iButton RFID Touch Memory Key is used in access control systems that rely on 1-Wire or iButton technology. It stores a unique 64-bit digital identification code in non-volatile memory, allowing it to be recognized by compatible DS1990A and TM1990A readers when briefly touched to the reader surface. It is commonly used for door entry systems, building intercoms, and similar secure-access applications.

Q: Can the RW1990 key be reprogrammed?

A: Yes — the RW1990 is fully rewritable. Unlike read-only iButton keys, this model allows you to overwrite its stored code using a compatible programmer, making it ideal for situations where you need to clone or update an existing key in your access control system.

Q: Is the RW1990 compatible with standard DS1990A iButton readers?

A: Absolutely. The RW1990 is designed to be fully compatible with DS1990A and TM1990A iButton readers, as well as standard 1-Wire network controllers. Simply touch the key to a compatible reader for instant digital identification.

Q: How durable are these keys?

A: Each key features a robust stainless steel housing that resists everyday wear, moisture, and corrosion. The high-quality CMOS microcircuit inside uses imported RW1990 chips rated for reliable, long-term performance across repeated read and write cycles.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.