The LM26 is a precision, single digital-output, low-power thermostat comprised of an internal reference, DAC, temperature sensor and comparator. Utilizing factory programming, it can be manufactured with different trip points as well as different digital output functionality. The trip point (TOS) can be preset at the factory to any temperature in the range of −55°C to +110°C in 1°C increments. The LM26 has one digital output (OS/ ^OS/US/ ^US), one digital input (HYST) and one analog output (VTEMP). The digital output stage can be preset as either open-drain or push-pull. In addition, it can be factory programmed to be active HIGH or LOW. The digital output can be factory programmed to indicate an over temperature shutdown event (OS or ^OS) or an under temperature shutdown event (US or ^US).
| LM26 | LM26LV | LM27 | LM56 | |
| # Comparators | 1 | 1 | 1 | 2 |
| Output Type | Open Drain or Push Pull | Open Drain and Push Pull | Open Drain or Push Pull | Open Drain |
| SetPoint Type | Fixed | Fixed | Fixed | Resistor Programmable |
| SetPoint Value (deg C) | -45, -25, 0, 45, 50, 65-70 (in 5 degree increments), 85-120 (in 5 degree increments) | 50, 60-150 (in 5 degree increments) | 120, 130, 140 | |
| Sensor Gain (mV/Deg C) | -10.82 | -5.1 to -12.8 | -10.82 | 6.2 |
| Accuracy Over Temp Range (Max) (C) | 3 | 2.3 | 3 | 3 |
| Supply Voltage (Min) (V) | 2.7 | 1.6 | 2.7 | 2.7 |
| Supply Voltage (Max) (V) | 5.5 | 5.5 | 5.5 | 10 |
| Iq (Typ) (uA) | 40 | 8 | 40 | 230 |
| Pin/Package | 5SOT | 6SON, 6USON, 6WSON | 5SOT | 8SOIC, 8VSSOP |
| Approx. Price (US$) | 0.43 | 1ku | 0.43 | 1ku | 0.65 | 1ku | 0.69 | 1ku |
| Rating | Catalog | Catalog | Catalog | Catalog |