JEDEC-compliant temperature sensor for DDR5 modules

News | May 5, 2020

By Ally Winning

The TS5111 is aimed at DDR5 memory modules and other applications like SSDs, computing motherboards, and communications equipment that need accurate, real-time temperature monitoring.

The device has been developed to provide high-precision system temperatures with programmable warning flags that allow systems to execute thermal control loop mechanisms such as memory refresh rates, fan speeds, and bandwidth throttling. In a package that measures only 0.8 x 1.3mm, the TS5111 supports I²C, SMBUS and the I3C Basic protocol for data rates up to 12.5 MHz, as well as advanced features like in-band interrupts, parity check, and packet error checks.

Other Renesas DDR5 RDIMM ICs include the 5RCD0148HC1 registered clock driver, the P8900 power management IC, and the SPD5118 SPD Hub.

Key Features:

Complies with the JEDEC JESD302-1 serial bus thermal sensor device specification
Temperature sensor accuracy
- Typical 0.5 °C in 75 °C < TA < 95 °C range
- Typical 1.0 °C in 40 °C < TA < 125 °C range
- Typical 2.0 °C in -40 °C < TA < 125 °C range
Two-wire bus serial interface (I²C and I3C operation modes)
Up to 12.5 MHz transfer rate
1.8 V & 1.1 V power supply input
Packet error check and parity error check functions
Bus reset function
Two unique addresses selected by SA pin
In-band interrupt