DS_6618_005
78M6618 Data Sheet
2.2 Recommended External Components
Table 3: Recommended External Components
To
Function
Value
Unit
µF
Name
C1
From
V3P3A
V3P3D
V3P3SYS
V2P5
AGND
DGND
DGND
DGND
XOUT
Bypass capacitor for 3.3 V supply
Bypass capacitor for 3.3 V output
Bypass capacitor for V3P3SYS
Bypass capacitor for V2P5
≥0.1 ±20%
0.1 ±20%
≥1.0 ±30%
0.1 ±20%
32.768
C2
µF
CSYS
C2P5
XTAL
µF
µF
XIN
32.768 kHz crystal – electrically similar to
ECS .327-12.5-17X or Vishay XT26T,
load capacitance 12.5 pF.
kHz
CXS
CXL
XIN
AGND
AGND
Load capacitor for crystal (depends on
crystal specs and board parasitics).
pF
pF
33 ±10%
15 ±10%
XOUT
Load capacitor for crystal (depends on
crystal specs and board parasitics).
Notes:
1. AGND and DGND should be connected together.
2. V3P3SYS and V3P3A should be connected together.
2.3 Recommended Operating Conditions
Table 4: Recommended Operating Conditions
Parameter
Condition
Min
3.0
0
Typ
3.3
Max
3.6
Unit
V
V3P3SYS, V3P3A: 3.3 V Supply Voltage Normal Operation
V3P3A and V3P3SYS must be at the
Battery Backup
3.6
V
same voltage
VBAT
No Battery
Externally Connect to V3P3SYS
Battery Backup:
BRN and LCD modes
SLEEP mode
3.0
2.0
3.8
3.8
V
V
Operating Temperature
-40
+85
ºC
Rev. 1.4
15
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
