NXP SA56004ED,118

SMBus compatible, 11-bit remote/local digital temperature sensor with overtemperature alarms. The remote channel monitors a diode junction, such as a substrate PNP of a microprocessor or a diode connected transistor. With factory trimming, remote sensor accuracy of ±1°C is achieved.

Undertemperature and overtemperature alert thresholds can be programmed to cause the ALERT output to indicate when the on-chip or remote temperature is out of range. The T_CRIT output is activated when the on-chip or remote temperature measurement rises above the programmed T_CRIT threshold register value. This output may be used to activate a cooling fan, send a warning or trigger a system shutdown. The SA56004X employs an SMBus time-out protocol. It has a unique device architecture.

The SA56004X is available in the SO8, TSSOP8 and HVSON8 packages. It has 8 factory-programmed device address options and is pin-compatible with the LM86, MAX6657/8, and ADM1032.

• Accurately senses temperature of remote microprocessor thermal diodes or diode connected transistors within ±1°C
• On-chip local temperature sensing within ±2°C
• Temperature range of -40°C to +125°C
• 11-bit, 0.125°C resolution
• 8 different device addresses are available for server applications. The SA56004ED with marking code 56004E, and SA56004EDP with marking code 6004E are address compatible with the National LM86, the MAX6657/8 and the ADM1032
• Offset registers available for adjusting the remote temperature accuracy
• Programmable under/overtemperature alarms: ALERT and T_CRIT
• SMBus 2.0 compatible interface, supports TIMEOUT
• Operating voltage range: 3.0 V to 3.6 V
• I²C-bus Standard-mode and Fast-mode compatible
• SO8, TSSOP8 and HVSON8 packages
• Programmable conversion rate (0.0625 Hz to 26 Hz)
• Undervoltage lockout prevents erroneous temperature readings
• Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA

• System thermal management in laptops, desktops, servers and workstations
• Computers and office electronic equipment
• Electronic test equipment and instrumentation
• HVAC
• Industrial controllers and embedded systems