Specialized IC, SERIAL NUMBER IBUTTON, F5 IBUTTON - More Details iButtons DS1990A is an amazing compact device introduced exclusively by Maxim integrated.
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Oct 9, 2021
Alma Black
Specialized IC, SERIAL NUMBER IBUTTON, F5 IBUTTON - More Details
iButtons DS1990A is an amazing compact device introduced exclusively by Maxim integrated. Furthermore, there is a huge range of Semiconductors, Capacitors, Resistors and ICs in stock. Welcome RFQ.
DS1990A-F5
DS1990A Pinout
| Pin Number | Pin Name | Description |
| 1 | Signal/IO | Data is sent and received through this pin a.k.a IO pin |
| 2 | Ground | Common ground pin |
DS1990A Footprint
The DS1990A serial number iButton is a rugged data carrier that serves as an electronic registration number for automatic identification. Data is transferred serially through the 1-Wire® protocol, which requires only a single data lead and a ground return. Every DS1990A is factory lasered with a guaranteed unique 64-bit registration number that allows for absolute traceability. The durable stainless-steel iButton package is highly resistant to environmental hazards such as dirt, moisture, and shock.
Maxim Integrated DS1990A-F5 technical specifications, attributes, parameters and parts with similar specifications to Maxim Integrated DS1990A-F5 .
| Product Attribute | Attribute Value | |
|---|---|---|
| Factory Lead Time | 6 Weeks | |
| Mount | Surface Mount | |
| Number of Pins | 2Pins | |
| Memory Types | ROM | |
| Operating Temperature | -40°C~85°C | |
| Series | iButton® | |
| Published | 2003 | |
| JESD-609 Code | e3 | |
| Pbfree Code | yes | |
| Part Status | Active | |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | |
| Number of Terminations | 2Terminations |
| Product Attribute | Attribute Value | |
|---|---|---|
| ECCN Code | EAR99 | |
| Terminal Finish | MATTE TIN | |
| Applications | Product Identification | |
| Terminal Position | END | |
| Number of Functions | 1Function | |
| Supply Voltage | 3.3V | |
| Base Part Number | DS1990A | |
| Pin Count | 2 | |
| Power Supplies | 3/5V | |
| Max Supply Voltage | 6V | |
| Min Supply Voltage | 2.8V | |
| Memory Size | 8B |
| Product Attribute | Attribute Value | |
|---|---|---|
| Organization | 64X1 | |
| Memory Density | 64 bit | |
| Access Time (Max) | 15000 ns | |
| Parallel/Serial | SERIAL | |
| Serial Bus Type | 1-WIRE | |
| Height | 6.45mm | |
| Length | 17.35mm | |
| Width | 17.35mm | |
| REACH SVHC | No SVHC | |
| Radiation Hardening | No | |
| RoHS Status | ROHS3 Compliant | |
| Lead Free | Lead Free |
Operating Voltage: 2.8V to 6V
Communication protocol: 1-Wire
Identifier: 64-bit registration number (laser engraved)
Data Read time: 5ms
Sink current 20mA
One wire Pull-Up Voltage: 2.8V to 6V
Maximum Input low Voltage: 0.3V
Minimum Input high Voltage: 2.2V
Access Control
Work-In-Progress Tracking
Tool Management
Inventory Control
The block diagram below shows the major functional blocks of the device. The DS1990A takes the energy it needs to operate from the IO line, as indicated by the parasite power block. The ROM function control unit includes the 1-Wire interface and the logic to implement the ROM function commands, which access 64 bits of lasered ROM.
DS1990A Block Diagram
Where to use DS1990A?
The DS1990A is an Address only type iButton, which means you can only read the 64-bit unique identification and not write to it. This gadget has a 5ms read time and uses a one-wire communication protocol, so all the user has to do is touch the device to the reader. This makes it suitable for projects that require a specific action to be conducted after reading the value from the iButton, such as opening a valve or triggering a siren.
How to use DS1990A?
The DS1990A is not self-contained; it requires a probe/connector to connect it to a reader, such as a computer or embedded hardware. There are various methods to use a DS1990A; however, if you plan to use it with a computer, you won't have to worry about anything because Maxim has already given the necessary hardware and software. The DS1990A can be directly connected to the computer's USB port using the DS9490R connector, and the data from the iButton can be read using the Java application running on the computer. If you're interested in learning more, read Maxim's Quick Start Guide.
When using the module with an embedded application such as an ATmega (Arduino), PIC, or any other MCU/MPU, the situation is slightly different. To connect the iButton to the hardware, you'll need a probe like the DS9092L. Then you must program the hardware (MCU/MPU) to read the data from the iButton using the 1-Wire interface. The circuit for a typical application is given below.
How to use DS1990A
As you can see, communication only takes two wires, one of which is the ground wire. A 1K pull up resistor is used to pull the signal wire (IO Wire) high. Because the DS1990A can function between 2.8 and 6 volts, it can be used with both 3.3 and 5-volt microcontroller platforms.
In order to shorten the time to market and keep up with the development of the market, you need a complete integration from the chip to the supply chain. Maxim Integrated can provide you with integrated solutions in the industrial, medical, consumer, automotive, energy, computing and communications fields.
Download datasheets and manufacturer documentation for DS1990A-F5
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