The DS2405 Addressable Switch is a product with a unique identification number and switch functionality. It can be controlled via a 1-Wire bus and supports independent switching of multiple devices. The product features low cost, low power consumption, and a wide operating temperature range.
The DS2405 Addressable Switch is an open‑drain N‑channel MOSFET with a unique 64‑bit factory‑laser‑etched registration number that provides both identification and remote control over a 1‑Wire bus. It draws all of its power parasitically from the bus and can be toggled or sensed via a single data pin.
The device supports multiple units on the same bus, offers a maximum data rate of 16.3 kbits/s, and includes detailed electrical characteristics such as voltage limits, temperature ranges, and timing parameters for reliable communication.
| Output Logic Low @ 4 mA | 0.4 V |
|---|---|
| Output Logic High | 6.0 V |
| Input load current (DATA pin) | 5 pA |
| Input resistance (PIO pin) | 10 MΩ |
| Capacitance (DATA pin) | 800 pF |
| Capacitance (PIO pin) | 10 pF |
| Maximum 1‑Wire data rate | 16.3 kbits/s |
| Time slot (tsLor) | 60‑120 µs |
The DS2405 derives its power entirely from the 1‑Wire bus using a parasitic power source.
Multiple DS2405s can be identified on a common 1‑Wire bus and operated independently.
The bus supports a maximum data rate of 16.3 kbits/s.
It operates with a supply voltage (Veup) from 2.8 V to 6.0 V.