The MAX6604 is a high-precision temperature sensor designed by Texas Instruments for thermal monitoring functions in DDR memory modules. The device is readable and programmable through the 2-wire SMBus/I2C-compatible interface. Three address inputs set the bus address for the temperature sensor to provide up to eight devices on one bus. The internal thermal sensor continuously monitors the temperature and updates the temperature data eight times per second. The master can read the temperature data at any time. Since the thermal sensor is located on the memory module, temperature data recorded accurately represents the temperature of the components on the module. Consequently, the MAX6604 provides a much more accurate measurement of module temperature than techniques involving temperature sensors on the motherboard. In addition, the device responds more quickly to temperature changes on the module than a motherboard sensor. The MAX6604 also features an interrupt-output indicator for temperature-threshold monitoring. The threshold levels are programmable through the digital interface. The MAX6604 operates from -20°C to +125°C, and is available in JEDEC-standard 8-pin TSSOP and 8-pin TDFN (2mm x 3mm) packages.
The MAX6604 precision temperature monitor is designed for thermal monitoring in DDR memory modules. It communicates over a 2‑wire SMBus/I²C‑compatible interface and can be addressed by up to eight devices on a single bus using three address inputs (A0‑A2). The sensor continuously measures temperature and updates the data eight times per second, providing accurate on‑module temperature readings.
The device includes an open‑drain EVENT output for temperature‑threshold monitoring, which can operate in interrupt, comparator, or critical‑temperature‑only modes. It is available in JEDEC‑standard 8‑pin TSSOP and 8‑pin TDFN packages and operates from –20 °C to +125 °C.
| Operating Supply Voltage Range | +2.7 V to +3.6 V |
|---|---|
| Operating Temperature Range | -20 °C to +125 °C |
| Temperature Accuracy | ±1 °C |
| Resolution | 11‑bit |
| Typical Operating Current | 0.3 mA – 0.5 mA |
| Package Options | 8‑Pin TSSOP, 8‑Pin TDFN (2 mm × 3 mm) |
It uses a 2‑wire SMBus/I²C‑compatible interface for reading and programming.
Up to eight devices can be addressed on the same bus using the three address inputs A0‑A2.
The EVENT output indicates when temperature crosses a programmed threshold and can operate in interrupt, comparator, or critical‑temperature‑only modes.