71M6545 Datasheet, PDF (114/134 Pages) Maxim Integrated Products – Four-Quadrant Metering, Phase Metrology Processors Flash/RAM Size

Data Sheet 71M6545/H
PDS_6545_009
6.2 Recommended External Components
Table 79: Recommended External Components
Name
C1
C2
CSYS
CVDD
From
V3P3A
V3P3D
V3P3SYS
VDD
XTAL
XIN
CXS
XIN
CXL
XOUT
To
GNDA
GNDD
GNDD
GNDD
XOUT
GNDA
GNDA
Function
Bypass capacitor for 3.3 V supply
Bypass capacitor for 3.3 V output
Bypass capacitor for V3P3SYS
Bypass capacitor for VDD
32.768 kHz crystal – electrically
equivalent to ECS .327-12.5-17X or
Vishay XT26T, load capacitance 12.5 pF
Load capacitor values for crystal depend
on crystal specifications and board
parasitics. Nominal values are based on
4 pF board capacitance and include an
allowance for chip capacitance.
Value
Unit
≥0.1 ±20% µF
0.1 ±20% µF
≥1.0 ±30% µF
0.1 ±20% µF
32.768
kHz
15 ±10%
pF
10 ±10%
pF
6.3 Recommended Operating Conditions
Unless otherwise specified, all parameters listed under 6.4 Performance Specifications and 6.5 Timing
Specifications are valid over the Recommended Operating Conditions provided in Table 80 below.
Table 80: Recommended Operating Conditions
Parameter
Condition
Min Typ Max Unit
V3P3SYS and V3P3A Supply Voltage for precision VBAT_RTC =0 V to
metering operation (MSN mode). Voltage at
3.8 V
3.0
VBAT_RTC need not be present.
3.6 V
VBAT_RTC Voltage. VBAT_RTC is not needed to
support the RTC and non-volatile memory unless V3P3SYS<2.0 V
2.0
V3P3SYS<2.0 V
3.8 V
Operating Temperature
-40
+85 ºC
Notes:
1. GNDA and GNDD must be connected together.
2. V3P3SYS and V3P3A must be connected together.
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