Connection Diagram

24 Pin QSOP

20035302

NS Package MQA24

Top View

LM85BIMQ or LM85CIMQ (55 units per rail), or

LM85BIMQX or LM85CIMQX (2500 units per tape and reel)

Information on the differences between the LM85BIMQ and LM85CIMQ can be found in Section 6.0. It is highly recommended

that all new designs use the LM85BIMQ.

Pin Descriptions

Symbol

Pin

Typ

Name and Function/Connection

SMBDAT

1

Digital I/O

(Open-Drain)

System Management Bus Data. Open-drain output. 5V tolerant,

SMBus 2.0 compliant.

SMBCLK

2

Digital Input

System Management Bus Clock. Tied to Open-drain output. 5V

tolerant, SMBus 2.0 compliant.

VID0

5

Digital Input

Voltage identification signal from the processor. This value is read

in the VID0–VID4 Status Register.

VID1

6

Digital Input

Voltage identification signal from the processor. This value is read

in the VID0–VID4 Status Register.

VID2

7

Digital Input

Voltage identification signal from the processor. This value is read

in the VID0–VID4 Status Register.

VID3

8

Digital Input

Voltage identification signal from the processor. This value is read

in the VID0–VID4 Status Register.

VID4

19

Digital Input

Voltage identification signal from the processor. This value is read

in the VID0–VID4 Status Register.

3.3V

4

POWER

+3.3V pin. Can be powered by +3.3V Standby power if monitoring

in low power states is required. This pin also serves as the analog

input to monitor the 3.3V supply. This pin should be bypassed

with a 0.1µf capacitor in parallel with 100pf. A bulk capacitance of

approximately 10µf needs to be in the near vicinity of the LM85.

GND

3

GROUND

Ground for all analog and digital circuitry.

5V

20

Analog Input

Analog input for +5V monitoring.

12V

21

Analog Input

Analog input for +12V monitoring.

2.5V

22

Analog Input

Analog input for +2.5V monitoring.

V

CCP

23

Analog Input

Analog input for +V

www.national.com

2