ST72682 STMicroelectronics, ST72682 Datasheet - Page 22

• Manufacturer Part Number: ST72682
• Description: USB 2.0 high-speed Flash drive controller
• Manufacturer: STMicroelectronics

Electrical characteristics
7.5
7.5.1
22/36
Clock and timing characteristics
Subject to general operating conditions for V
Crystal oscillator
The Device internal clock is supplied from a crystal oscillator. All the information given in this
paragraph are based on characterization results with specified typical external components.
In the application the load capacitors have to be placed as close as possible to the oscillator
pins in order to minimize output distortion and start-up stabilization time. Refer to the crystal
manufacturer for more details (frequency, package, accuracy...).
Table 14.
1. The crystal oscillator duty cycle has to be adjusted through the two C
Figure 7.
1. Depending on the crystal power dissipation, a serial resistor R
Table 15.
Symbol
CK
α
f
manufacturer for more details.
manufacturer for more details.
OSC
OSC
ACC
V
DDA
Oscillator frequency
Total crystal oscillator
accuracy
Crystal oscillator duty cycle
Clock characteristics
Typical application with a crystal
Typical C
Supplier
C
C
L
NDK
L
Parameter
L
and R
R
CRYSTAL
SOSCOUT
S
values by crystal
(1)
(1)
Absolute value +
temperature + aging
OSCIN
OSCOUT
DD33
Conditions
Typical Crystal
AT51 or AT41
, f
OSC
sOscout
, and T
L
may be added. Refer to the crystal
capacitors. Refer to the crystal
A
.
Min
45
Device
C
L
Typ
16
www.DataSheet4U.com
12
50
(pF)
Max
±60
55
R
SOSCOUT
ST72682
560
(Ω)
MHz
Unit
ppm
%