71M6533 Datasheet, PDF (108/132 Pages) Teridian Semiconductor Corporation – Energy Meter IC

71M6533/G/H and 71M6534/H Data Sheet
FDS_6533_6534_004
6.2 Recommended External Components
Table 68: Recommended External Components
Name
C1
C2
From
V3P3A
V3P3D
To
AGND
GNDD
Function
Bypass capacitor for 3.3 V supply
Bypass capacitor for 3.3 V output
Value
≥0.1 ±20% ^†
0.1 ±20% ^†
Unit
µF
µF
CSYS V3P3SYS GNDD Bypass capacitor for V3P3SYS
≥1.0 ±30% µF
C2P5
V2P5
GNDD Bypass capacitor for V2P5
0.1 ±20% µF
XTAL
XIN
CXS
XIN
32.768 kHz crystal – electrically similar to
XOUT ECS .327-12.5-17X or Vishay XT26T,
32.768
kHz
load capacitance 12.5 pF
AGND
Load capacitor for crystal (depends on
crystal specs and board parasitics).
33 ±10%
pF
CXL
XOUT
AGND
Load capacitor for crystal (depends on
crystal specs and board parasitics).
7 ±10% ^††
pF
Notes:
1. AGND and GNDD should be connected together.
2. V3P3SYS and V3P3A should be connected together.
† _{For accuracy and EMI rejection, C1 + C2 should be 470 µF or higher.}
†† _{10, 12, or 15 pF may be used if 7 pF is not available, with limited range for RTCA_ADJ.}
6.3 Recommended Operating Conditions
Table 69: Recommended Operating Conditions
Parameter
V3P3SYS, V3P3A: 3.3 V Supply Voltage
V3P3A and V3P3SYS must be at the
same voltage
VBAT
Operating Temperature
Condition
Normal Operation
Battery Backup
No Battery
Battery Backup:
BRN and LCD modes
SLEEP mode
Min Typ Max Unit
3.0
3.3
3.6
V
0
3.6
V
Externally Connect to V3P3SYS
3.0
3.8
V
2.0
3.8
V
-40
+85
ºC
108
Rev 2