71M6543GHT-IGTSLASHF datasheet(15/75 Pages) MAXIM

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71M6543GT/71M6543GHT

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Pin Descriptions

NAME

TYPE CIRCUIT

FUNCTION

100

POWER AND GROUND PINS

72, 80

GNDA

—

Analog Ground. This pin should be connected directly to the ground plane.

GNDD

—

Digital Ground. This pin should be connected directly to the ground plane.

VV3P3A

—

Analog Power Supply. A 3.3V power supply should be connected to this

pin. VV3P3A must be the same voltage as VV3P3SYS.

VV3P3SYS

—

System 3.3V supply. This pin should be connected to a 3.3V power supply.

VV3P3D

Auxiliary Voltage Output of the Chip. In mission mode, this pin is

connected to VV3P3SYS by the internal selection switch. In BRN mode,

it is internally connected to VBAT. VV3P3DisfloatinginLCDandsleep

mode. A 0.1µF bypass capacitor to ground must be connected to this pin.

VDD

—

Output of the 2.5V Regulator. This pin is powered in MSN and BRN modes.

A 0.1µF bypass capacitor to ground should be connected to this pin.

VLCD

—

Output of the LCD DAC. A 0.1µF bypass capacitor to ground should be

connected to this pin.

VBAT

Battery Backup Pin to Support the Battery Modes (BRN, LCD). A battery or

super capacitor is to be connected between VBAT and GNDD. If no battery

is used, connect VBAT to VV3P3SYS.

VBAT_RTC

RTC and Oscillator Power Supply. A battery or super capacitor is to be

connected between VBAT and GNDD. If no battery is used, connect VBAT_

RTC to VV3P3SYS.

ANALOG PINS

87, 86

IADC0

IADC1

Differential or Single-Ended Line Current Sense Inputs. These pins are

voltage inputs to the internal A/D converter. Typically, they are connected

to the outputs of current sensors. Unused pins must be tied to VV3P3A.

PinsIADC2-IADC3,IADC4-IADC5andIADC6-IADC7maybeconfigured

for communication with the remote sensor interface (71M6x03).

68, 67

IADC2

IADC3

66, 65

IADC4

IADC5

64, 63

IADC6

IADC7

84, 83, 82

VADC8 (VA),

VADC9 (VB),

VADC10 (VC)

Line Voltage Sense Inputs. These pins are voltage inputs to the internal

A/D converter. Typically, they are connected to the outputs of resistor-

dividers. Unused pins must be tied to VV3P3A.

VREF

VoltageReferencefortheADC.Thispinshouldbeleftunconnected(floating).

XIN

Crystal Inputs. A 32.768kHz crystal should be connected across these

pins. Typically, a 22pF capacitor is also connected from XIN to GNDA

and a 22pF capacitor is connected from XOUT to GNDA. It is important

to minimize the capacitance between these pins. See the crystal

manufacturer data sheet for details. If an external clock is used, a

150mVP-P clock signal should be applied to XIN, and XOUT should be left

unconnected.

XOUT

71M6543GHT-IGT/F 数据表(PDF) 15 Page - Maxim Integrated Products

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