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BA7149F датащи(PDF) 7 Page - Rohm

номер детали BA7149F
подробное описание детали  Electronic viewfinder driver
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производитель  ROHM [Rohm]
домашняя страница  http://www.rohm.com
Logo ROHM - Rohm

BA7149F датащи(HTML) 7 Page - Rohm

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7
Video ICs
BA7149F
Operation notes
(1) H.OSC free-run frequency and capture range
The free-run frequency is determined by the 115k
resistor connected between pin 15 and GND. The cap-
ture range is varied by the resistors and capacitor con-
nected to pins 14 and 15.
The free-run frequency and capture range for this IC
are guaranteed for these circuit constant values, and
we recommend that you use them. The resistor 115k
connected between pin15 and GND should have a tol-
erance of ± 2%, and a temperature coefficient of ±
100ppm or lower.
(2) V.OSC free-run frequency
The V.OSC free-run frequency is determined by the
15k
Ω resistor connected between pin 6 and GND, and
the 0.1
µF capacitor connected between pin 7 and
GND.
The free-run frequency and capture range for this IC
are guaranteed for these circuit constant values, and
we recommend that you use them. The resistor 15k
connected between pin 6 and GND should have a tol-
erance of ± 2%, and a temperature coefficient of ±
100ppm or lower, and the capacitor connected
between pin 7 and GND should have a tolerance of ±
5%, and a temperature coefficient of ± 250ppm or
lower.
(3) Use with PAL systems
In PAL systems, change the value of the resistor con-
nected between pin 6 and GND to 18k
Ω.
(4) PCB pattern
The large-signal systems and small-signal systems in
the IC have been kept separate, and the external wring
must also be done in such a way to prevent interfer-
ence from occurring. In particular, to prevent the FBT
return current from interfering with the V. OSC circuit
on pins 6 and 7, do not directly connect the pin 4 GND
and pin 6 and 7 GND.
1
16
2
3
4
5
6
7
8
9
10
11
12
13
14
15
G
FBT
VCC
Do not connect pin 4 GND
to pin 6 and 7 GND.
Fig.14
External dimensions (Units: mm)
SOP16
0.4
± 0.1
1.27
0.15
0.3Min.
1
16
10.0
± 0.2
8
9


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