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| 型号： | 78M6612-SOCKET68 |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 29/46页 |
| 文件大小： | 0K |
| 描述： | BOARD 78M6612 68PIN QFN |
| 标准包装： | 1 |
| 系列： | * |
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DS_6612_001
78M6612 Data Sheet
4.2
Recommended External Components
Table 6: Recommended External Components
CXL
Name
C1
C2
CSYS
C2P5
XTAL
CXS ?
?
From
V3P3A
V3P3D
V3P3SYS
V2P5
XIN
XIN
XOUT
To
AGND
DGND
DGND
DGND
XOUT
AGND
AGND
Function
Bypass capacitor for 3.3V supply.
Bypass capacitor for 3.3V output.
Bypass capacitor for V3P3SYS.
Bypass capacitor for V2P5.
32.768 kHz crystal – electrically similar to
ECS .327-12.5-17X or Vishay XT26T, load
capacitance 12.5 pF.
Load capacitor for crystal (exact value
depends on crystal specifications and
parasitic capacitance of board).
Value
≥ 0.1 ± 20%
0.1 ± 20%
≥ 1.0 ± 30%
0.1 ± 20%
32.768
27 ± 10%
27 ± 10%
Unit
μ F
μ F
μ F
μ F
kHz
pF
pF
Depending on trace capacitance, higher or lower values for CXS and CXL must be used. Capacitance
?
from XIN to GNDD and XOUT to GNDD (combining pin, trace and crystal capacitance) should be 35 pF
to 37 pF.
4.3
Recommended Operating Conditions
Table 7: Recommended Operation Conditions
Parameter
V3P3SYS, V3P3A : 3.3V Supply Voltage
V3P3A and V3P3SYS must be at the
same voltage
Condition
Normal Operation
Battery Backup
Min
3.0
0
Typ
3.3
Max
3.6
3.6
Unit
V
V
VBAT
No Battery
Externally Connect to V3P3SYS
Operating Temperature
Rev 2
Battery Backup
BRN and LCD modes
SLEEP mode
3.0
2.0
-40
3.8
3.8
+85
V
V
oC
29
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