71m6541g-igtr/f Maxim Integrated Products, Inc., 71m6541g-igtr/f Datasheet - Page 157
71m6541g-igtr/f
Manufacturer Part Number
71m6541g-igtr/f
Description
71m6541d/71m6541f/71m6542f Energy Meter Ics
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.71M6541G-IGTRF.pdf
(165 pages)
- Current page: 157 of 165
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6.8
6.8.1 Power and Ground Pins
Pin types: P = Power, O = Output, I = Input, I/O = Input/Output.
The circuit number denotes the equivalent circuit, as specified under
.
v1.1
(64 pin)
Pin
50
42
53
45
41
40
57
46
47
Pin Descriptions
(100-pin)
72, 80
Pin
62
85
69
61
60
89
70
71
Name
GNDA
GNDD
V3P3A
V3P3SYS
V3P3D
VDD
VLCD
VBAT
VBAT_RTC
© 2008–2011 Teridian Semiconductor Corporation
Type Circuit
Table 117: Power and Ground Pins
O
O
O
P
P
P
P
P
P
13
12
12
–
–
–
–
–
–
Description
Analog ground: This pin should be connected directly to
the ground plane.
Digital ground: This pin should be connected directly to
the ground plane.
Analog power supply: A 3.3 V power supply should be
connected to this pin. V3P3A must be the same
voltage as V3P3SYS.
System 3.3 V supply. This pin should be connected to a
3.3 V power supply.
Auxiliary voltage output of the chip. In mission mode,
this pin is connected to V3P3SYS by the internal
selection switch. In BRN mode, it is internally
connected to VBAT. V3P3D is floating in LCD and
sleep mode. A 0.1 µF bypass capacitor to ground
must be connected to this pin.
The output of the 2.5V regulator. This pin is powered
in MSN and BRN modes. A 0.1 µF bypass capacitor to
ground should be connected to this pin.
The output of the LCD DAC. A 0.1 µF bypass
capacitor to ground should be connected to this pin.
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 V3P3SYS.
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
V3P3SYS.
6.8.4 I/O Equivalent
Circuits.
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