STFPC320 STMicroelectronics, STFPC320 Datasheet - Page 68

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STFPC320

Manufacturer Part Number
STFPC320
Description
Front Panel Controller/driver With Standby Power Management And Real-time Clock
Manufacturer
STMicroelectronics
Datasheet

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Electrical characteristics
17.5
17.6
68/75
Crystal electrical characteristics
Table 17.
1. Externally supplied. ST recommends the Citizen CFS-145 (1.5x5mm) and the KDS DT-38 (3x8mm) for
2. Circuit board layout considerations for the 32.768KHz crystal of minimum trace lengths and isolation from
3. Guaranteed by design.
Oscillator characteristics
Table 18.
1. Reference value. T
Symbol
Symbol
thru-hole, or the KDS DMX-26S(3.2x8mm) for surface-mount, tuning fork-type quartz crystals.
KDS can be contacted at kouhou@kdsj.co.jp or http://www.kdsj.co.jp
Citizen can be contacted at csd@citizen-americal.com or http://www.citizencrystal.com
RF generating signals should be taken into account.
V
t
C
C
R
STA
C
f
STA
O
L1
L2
S
L
Oscillator Start Voltage
Oscillator Start Time
XIN
XOUT
IC-to-IC frequency
variation
Resonant frequency
Series resistance
Load capacitance
Crystal electrical characteristics
Oscillator characteristics
A
Parameter
= 25
(1)
°
C, V
Parameter
CC
= 3.0V, CFM-145 (CL = 6pF, 32.768 KHz) manufactured by Citizen
V
≤10 seconds
(1) (2)
CC
= 3.0V
Conditions
Min
Min
1.5
-10
32.768
12.5
Typ
Typ
35
40
Max
Max
+10
25
25
1
(3)
STFPC320
Units
Unit
ppm
kHz
kΩ
pF
pF
pF
V
s

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