Serial Bus Traces

Pull-Up Resistors

Supply Bypass

Capacitor

Via to Power or Ground Plane

Via to Internal Layer

Supply Voltage

SDA

SCL

ALERT

A2

A1

A0

VS

GND

Ground Plane for

Thermal Coupling

to Heat Source

Heat Source

TMP175-Q1, TMP75-Q1

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SBOS759 – NOVEMBER 2015

9 Power Supply Recommendations

The TMP175-Q1 and TMP75-Q1 devices operate with power supplies in the range of 2.7 V to 5.5 V. A power-

supply bypass capacitor is required for stability; place this capacitor as close as possible to the supply and

ground pins of the device. A typical value for this supply bypass capacitor is 0.01

μF. Applications with noisy or

high-impedance power supplies can require additional decoupling capacitors to reject power-supply noise.

10 Layout

10.1 Layout Guidelines

Place the power-supply bypass capacitor as close as possible to the supply and ground pins. The recommended

value of this bypass capacitor is 0.01

μF. Additional decoupling capacitance can be added to compensate for

noisy or high-impedance power supplies. Pull up the open-drain output pins SDA, SCL, and ALERT through 5-k

Ω

pullup resistors.

10.2 Layout Example

Figure 15. Layout Example

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Product Folder Links: TMP175-Q1 TMP75-Q1