What is TM Card?

TM (Touch Memory) card is a patented product of American DALLAS company (now not unique to Dallas, domestic brands such as LIY are rising), it uses single-wire protocol communication, complete data reading and writing through instant touch, both non-Dallas The contact IC card is easy to operate and has the cheapness of the contact IC card. It is one of the most cost-effective IC cards at present.

Parameter editing

Features

The integrated circuit chip of the TM card is sealed in a stainless steel shell, which is waterproof, shockproof, anti-corrosion, sturdy and durable, without wiring; TM card is a passive device, and reads information with power supply from the reader;

It is fully compatible with DS19961S-F5. Built-in laser-engraved 64-bit binary code, the total number of codes can reach 280 trillion; TM card chip has electrostatic protection function and uniqueness cannot be copied;

TM card can be used in the range of -40℃～+85℃.

Technical specifications

American DALLAS encryption card

Mean failure

Normal use 1/100,000 times

Manufacturer serial number

The only 64-digit number in the world

System logic

64-bit password protection

storage capacity

8Kbits RAM

Card reading method

Touch

Read and write characteristics

Readable, writable and encryptable

Number of reads and writes

1.5 billion times or more

Technical index

Working temperature -40 ℃～+85 ℃

Reading times> 350,000 times

Service life >20 years

TM card size φ16.25mm×5.89mm

Product weight 2.5g

Unlocking principle

When opening the door, the electric control system of the lock verifies whether the 64-bit password stored in the TM card is the same as the stored password. Open the door if they are the same, and don't react to differences. If the number string is tried for a certain number of times, it will alarm.

That is, the TM card has a difference of 2 to the 64th power.

Application fields: Used in various inspection systems such as smart communities, postal services, railways, fire protection, electric power, cable television, chemicals, oil fields, and hotels, school dormitories, TM door locks, TM water meters, TM electricity meters, and TM gas meters.