The DS56 Dual Temperature Comparator is a temperature sensor and voltage reference combination device that has two independent open-drain thermostat outputs and respective trip point inputs. The trip points are set with external resistors that divide down the 1.25V internal bandgap voltage reference. The voltage resulting from this resistive division is compared with the voltage corresponding to the device’s junction temperature to define the thermostat output logic state. The internal temperature sensor has a typical sensitivity of +6.2mV/°C and DC offset of +395 mV at 0°C. Both thermostat outputs have adjustable hysteresis. The device is housed in a narrow-body SO8 (150-mil) package and has an operating power supply range of 2.7V to 5.5V. It is suitable for monitoring disk drives, printers, office equipment, HVAC, appliances, or any power/cost/temperature-sensitive environments.
The DS56 combines a precision bandgap voltage reference, an internal temperature sensor, and two independent thermostat comparators. It provides two open‑drain thermostat outputs with 5 °C hysteresis and a sensor output of +6.2 mV/°C (typical) and a 395 mV offset at 0 °C.
The device operates from a 2.7 V to 5.5 V supply and works over a temperature range of –40 °C to +125 °C. It is offered in 8‑pin SOIC, uSOP and other package options, with ordering codes such as DS56S, DS56U, and tape‑and‑reel variants.
| Supply Voltage Range | 2.7 V to 5.5 V |
|---|---|
| Operating Temperature Range | -40 °C to +125 °C |
| Temperature Sensor Sensitivity | +6.2 mV/°C (typical) |
| Temperature Sensor DC Offset | 395 mV at 0 °C |
| Thermostat Hysteresis | 5 °C |
| Bandgap Reference Voltage | 1.25 V (typical) |
| Number of Thermostat Outputs | 2 (open‑drain) |
The DS56 operates from 2.7 V to 5.5 V supply voltage.
It provides two independent open‑drain thermostat outputs, each with 5 °C hysteresis.
The internal temperature sensor has a typical sensitivity of +6.2 mV/°C.
The device is rated for –40 °C to +125 °C operation.