Mengmen 10-Piece RW1990 Rewritable iButton Memory Keys for Card Copying

Description

• Code stored in internal nonvolatile memory.
• Data exchange via the 1-Wire protocol using one data pin and a common pin.
• CMOS integrated circuit with a 64-bit digital code.
• Supports the Search 1-Wire Protocol for multiple devices on one bus.
• Bus-state changes and synchronization intervals are controlled by pulse interruptions.
• Data is read and written bit by bit.

Mengmen RW1990 chip. Rewritable RW1990A-F5 read/write key card, compatible with DS1990A and TM1990A iButtons. Features a unique 64-bit identification number and an integrated multidrop controller for a 1-Wire network. Waterproof and rewritable; suitable for copying RW1990, DS1990A, and TM1990A iButtons. Specifications: American encryption; failure rate: 1 in 100,000; memory: 8 KB RAM; inductive type; read/write and encryption; read/write cycles: 1,500,000,000; operating temperature: -40 to 85C; service life: more than 20 years. Made of plastic with stainless-steel SU304 components; resistant to rust, corrosion, and heat. Applications include access control, door locks, electronic door locks, door intercom systems, cards, identification, banking, communications, rail transport, transportation, and other areas. Color: random; a specific color cannot be selected. Size: 16.25 5.89 mm. Package includes 10 memory keys only. Other items are not included. Product color may vary slightly due to lighting and screen settings. Measurements may vary by 13 cm.

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