What Is a Touch Memory Card?

A Touch Memory Card, also called a Touch Memory Key or iButton key, is a contact-based electronic identification device. Its metal contact surface connects with a compatible reader probe to exchange identification data.

Unlike conventional contactless RFID and NFC cards, Touch Memory keys use physical electrical contact rather than wireless radio-frequency communication. The reader and the selected chip must support a compatible interface and identification format.

Touch Memory identification is used in systems for access control, personnel identification, inspection checkpoints, tool management, inventory control and work-in-progress tracking. The selected model determines whether the identification number is read-only or supports writing.

Touch Memory Card Specifications

Dimensions refer to the F5-style contact-button assembly. Holder dimensions depend on the selected accessory. The operating temperature range follows the product specification; exact performance requirements should be stated for the chosen configuration.

The stainless-steel contact package is designed for demanding identification applications. The product range is listed with resistance to water, dust, heat and shock. No specific IP protection rating is claimed on this page.

TM1990A vs. RW1990: Which Touch Memory Key Should You Choose?

Choosing the correct chip is essential for compatibility with an existing access control or identification system.

TM1990A is suitable for systems that use a read-only identification key. RW1990 supports writable identification and is intended for compatible systems that require ID programming.

DS1990A is a separate Analog Devices serial-number iButton with a unique 64-bit registration number. It should not be treated as the same chip as TM1990A or RW1990. Buyers specifying DS1990A should identify that exact component requirement in their inquiry.

Before ordering, provide the existing reader or controller model and the required chip type. This helps align the product configuration with the intended application.

How Does 1-Wire Touch Memory Identification Work?

Touch Memory identification uses a physical contact between the key and a compatible probe. The reader communicates with the electronic chip through the 1-Wire interface, where supported by the selected model.

A typical identification process includes:

1. Physical contact: The metal contact button meets the reader probe.

2. Data communication: The reader communicates with the chip through the supported interface.

3. ID processing: The reader or controller receives the identification data.

4. System response: The connected system applies its own authorization or identification rules.

The key provides identification data; system permissions and access decisions are determined by the connected controller and software.

For more advanced security requirements, buyers should consider the security capabilities of the complete system rather than treating a standard identification number as cryptographic authentication.

Touch Memory Card Applications

Access Control and Door Locks

Touch Memory keys are used in compatible access control systems, electronic door locks and contact-based identification readers. The selected chip must match the reader and controller requirements.

Hotels and School Dormitories

Contact identification keys can support compatible door-lock and facility access systems. Procurement should include the lock model, required ID format and any restrictions imposed by the existing access control system.

Electricity and Water Meter Identification

Touch Memory identification can support compatible utility meter reading, maintenance and service identification workflows. The meter interface and controller requirements determine the suitable configuration.

Warehouse and Inventory Control

Keys can identify assets, tools, storage locations or authorized operators in systems equipped with compatible contact readers. Accessory choices help adapt the product to the intended use.

Guard Tour and Fire Equipment Management

Touch Memory keys and checkpoints can support inspection rounds, equipment identification and maintenance records. The associated reader or inspection system processes the identification data.

Vehicle, Railway and Industrial Equipment Identification

Compatible systems can use contact identification keys for selected vehicle, maintenance-tool and equipment management tasks. Applications involving safety-critical controls require a system design appropriate to the relevant safety requirements.

Cable TV, Chemical Facilities, Postal and Work-in-Progress Tracking

Touch Memory keys can identify equipment, service points, containers or production items in compatible identification systems. The required environmental resistance, reader compatibility and identification workflow should be included in the project specification.

Custom Touch Memory Keys for OEM and Bulk Orders

Kaisere offers customization options for applicable Touch Memory Key configurations, helping brands, distributors, system integrators and equipment manufacturers align the product with their projects.

Customization options include:

lHolder colors: Select from available red, blue, green, yellow and other configurations.

lLogo and marking: Add supported branding or identification markings.

lAccessory options: Choose applicable plastic holders, leather keychains, metal rings, silicone wristbands, plastic bracelets and checkpoint accessories.

lChip configuration: Specify TM1990A, RW1990 or another explicitly agreed model.

lPackaging: Define standard or customized packaging and labeling requirements.

For OEM projects, provide the desired chip, reference design, holder style, logo artwork, estimated quantity and packaging requirements. Available configurations, MOQ, sample arrangements and production lead time are confirmed for the selected order.

Manufacturing Capability, Quality Control and Supply

Kaisere Technology has supplied RFID products to international B2B customers since 2003. Its overall RFID manufacturing operation covers approximately 10,000 m², with reported production capacity exceeding 12 million RFID products per month across its product portfolio. The company serves customers in more than 100 countries.

These figures describe company-wide RFID operations, not the monthly capacity of Touch Memory Keys alone.

Order-Specific Quality Control

Touch Memory Key orders should follow agreed specifications covering the selected model, contact-button construction, dimensions, holder configuration and required identification function.

The product quality plan covers the applicable checks for:

lChip model and identification-function requirements.

lContact-button appearance and dimensional consistency.

lFunctional reading with the specified compatible test reader.

lHolder, accessory and assembly condition.

lOrder quantity, packaging and shipment identification.

Acceptance criteria and inspection records should correspond to the actual tests performed and the requirements agreed for each order.

Product Documentation and Compliance

Technical documentation should match the actual chip model and finished product configuration. Buyers can specify required datasheets, material information, product inspection records and destination-market compliance documents when requesting a quotation.

Certificates and test reports should be applicable to the supplying company, product and intended use. Contact Kaisere with your documentation requirements so the available records can be aligned with the purchase specification.

Bulk Ordering and Global Shipping

Kaisere supports international B2B inquiries for product sourcing, customization and bulk supply. Shipping arrangements depend on the order quantity, destination and agreed delivery terms.

For an efficient quotation, provide:

lRequired chip model and identification function.

lExisting reader or controller model.

lEstimated quantity and repeat-order expectations.

lHolder color, accessories, logo and packaging requirements.

lDestination country and preferred delivery date.

The ordering process follows the agreed product configuration, sample requirements, specification approval, production planning, quality checks and shipment arrangements.

Available shipping methods and delivery schedules are confirmed for the specific order. This allows buyers to align product requirements, production timing and international delivery before placing a purchase order.

Frequently Asked Questions

1. What Is a Touch Memory Card?

A Touch Memory Card is a contact-based electronic identification device. It exchanges identification data when its metal contact button connects with a compatible reader probe.

2. What Is the Difference Between TM1990A and RW1990?

TM1990A is a read-only identification option, while RW1990 supports writable identification. The required chip should match the reader, controller and ID configuration of the target system.

3. Is DS1990A the Same as TM1990A or RW1990?

No. DS1990A is a separate Analog Devices serial-number iButton. TM1990A and RW1990 are different product designations. Specify the exact required model in your purchase inquiry.

4. Does a Touch Memory Key Use the 1-Wire Protocol?

The listed Touch Memory configurations use the 1-Wire interface for compatible systems. Reader and controller compatibility must match the selected chip and identification format.

5. What Are the Dimensions and Operating Temperature?

The listed F5-style assembly has a maximum outer diameter of 17.35 mm and a height of 5.89 mm. The product specification lists an operating temperature range of -40°C to +85°C.

6. Can Touch Memory Keys Be Customized?

Available options include selected holder colors, logos, metal rings, leather keychains, silicone wristbands, plastic bracelets and checkpoint accessories. Configuration, MOQ and lead time depend on the order requirements.

7. How Do I Check Reader Compatibility?

Provide the reader or controller model, current key or chip designation, and the required identification function. These details help determine the appropriate configuration before bulk ordering.

8. What Information Is Needed for a Bulk Quote?

Share the required model, reader type, quantity, customization, packaging, destination country and preferred delivery schedule. Include any required technical or compliance documents.

9. Can Touch Memory Keys Be Used for Access Control and Asset Management?

Yes. They support compatible contact-based systems for access control, inspection checkpoints, tool management, inventory identification and work-in-progress tracking. The specific application depends on reader compatibility and system requirements.

10. How Can I Request Samples?

Contact Kaisere with your chip model, reader details, intended application and sample quantity. The sales team can coordinate the applicable sample configuration,