71M6541D Maxim, 71M6541D Datasheet - Page 139

• Manufacturer Part Number: 71M6541D
• Description: The 71M6541D/71M6541F/71M6541G/71M6542F/71M6542G are Teridian™ 4th-generation single-phase metering SoCs with a 5MHz 8051-compatible MPU core, low-power RTC with digital temperature compensation, flash memory, and LCD driver
• Manufacturer: Maxim

6.2
6.3
Unless otherwise specified, all parameters listed in
Specifications
Rev 2
Parameter
V3P3SYS and V3P3A Supply Voltage for
precision metering operation (MSN mode).
Voltages at VBAT and VBAT_RTC need
not be present.
VBAT Voltage (BRN mode). V3P3SYS is
below the 2.8 V comparator threshold.
Either V3P3SYS or VBAT_RTC must be
high enough to power the RTC module.
VBAT_RTC Voltage. VBAT_RTC is not
needed to support the RTC and non-
volatile memory unless V3P3SYS < 2.0 V
Operating Temperature
Notes:
CVLCD
CVDD
Name
CSYS
XTAL
CXS
CXL
C1
C2
1. GNDA and GNDD must be connected together.
2. V3P3SYS and V3P3A must be connected together.
Recommended External Components
Recommended Operating Conditions
Solder temperature – 10 second duration
ESD stress on all pins
V3P3SYS
V3P3A
V3P3D
are valid over the Recommended Operating Conditions provided in
XOUT
VLCD
From
VDD
XIN
XIN
Table 94: Recommended External Components
Table 95: Recommended Operating Conditions
GNDA
GNDD
GNDD
GNDD
GNDD
GNDA
GNDA
XOUT
To
Function
Bypass capacitor for 3.3 V supply
Bypass capacitor for 3.3 V output
Bypass capacitor for V3P3SYS
Bypass capacitor for VDD
Bypass capacitor for VLCD pin (when
charge pump is used)
32.768 kHz crystal – electrically similar to
ECS .327-12.5-17X, Vishay XT26T or
Suntsu SCP6–32.768kHz TR (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.
Condition
VBAT=0 V to 3.8 V
VBAT_RTC =0 V to
3.8 V
V3P3SYS < 2.8 V
and
Max (VBAT_RTC,
V3P3SYS) > 2.0 V
V3P3SYS<2.0 V
6.4 Performance Specifications
71M6541D/F/G and 71M6542F/G Data Sheet
Min
3.0
2.5
2.0
-40
+250 °C
±4 kV
Typ
Table 95
and
≥0.1 ±20%
≥1.0 ±30%
≥0.1 ±20%
0.1 ±20%
0.1 ±20%
15 ±10%
10 ±10%
32.768
Value
6.5 Timing
Max
+85
3.6
3.8
3.8
below.
Unit
Unit
kHz
ºC
µF
µF
µF
µF
µF
pF
pF
V
V
V
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