Table 12: Specification Of Xh414H-Iv01E - SimCom SIM802 HD Manual

SIM802 Hardware Design
Capacitor backup
Some suitable coin cells are the coin-type capacitors available from SEIKO (XH414H-IV01E), or
from SHOEI (PAS414HR-VG1). They have a small physical size (4.8 mm diameter) and give
hours of backup time.
The specification of XH414H-IV01E is shown in following table.

Table 12: Specification of XH414H-IV01E

Parameter
Operation temperature
Rated operation voltage
Charging voltage
Nominal capacity
( discharge capacity,3.3V to 2.0V)
Nominal capacity
( electrostatic capacity,3.3V to 0.0V)
Internal impedance
Nominal dimension (diameter)
Nominal dimension (height)
Note:
Gold-capacitance backup
Some suitable coin cells are the electric double layer capacitors available from Seiko (XC621),
or from Panasonic (EECEM0E204A). They have a small physical size (6.8 mm diameter) and a
nominal capacity of 0.2 F to 0.3 F, giving hours of backup time.
SIM802_HD_V2.01
Figure 18: Seiko TS621 Charge Characteristic
Min Type
-25
3.3
0.015
0.07
70
4.8
1.4
42
Max Unit
70 °C
V
3.3 V
mAh
F
Ω
mm
mm
12.01.2010