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SC9257 Datasheet(PDF) 5 Page - Silan Microelectronics Joint-stock

Part # SC9257
Description  PLL FOR DTS
Download  28 Pages
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Manufacturer  SILAN [Silan Microelectronics Joint-stock]
Direct Link  http://www.silan.com.cn
Logo SILAN - Silan Microelectronics Joint-stock

SC9257 Datasheet(HTML) 5 Page - Silan Microelectronics Joint-stock

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Silan
Semiconductors
SC9257
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
REV: 1.0
2001.10.18
5
PIN DESCRIPTION
Pin No.
Symbol
Pin name
Description
Circuit diagram
1
XT
2
XT
Crystal oscillator
pins
Connects 3.6MHz, 4.5MHz, 7.2MHz or
10.8MHz crystal oscillator to supply
reference frequency and internal clock
XT
XT
VDD
3
PERIOD
Period signal input
4
CLOCK
Clock signal input
5
DATA
Serial data
input/output
Serial I/O ports. These pins transfer
data to and from the controller to set
divisions and dividing modes, and to
control the general-purpose counter
and general-purpose I/O ports.
Schmitt
input
DATA
VDD
Schmitt input
CLOCK,PERIOD
6
OT-1
7
OT-2
8
OT-3
9
OT-4
General-purpose
output ports
N channel open drain port pins, for
such uses as control signal output.
These pins are set to the OFF state
when power is turned on.
N-channel open drain
10
I/O-5/CLK
11
I/O-6
General-purpose
I/O ports
CMOS structure allows free use of
these ports for input or output. Ports
are set for input when the power is
turned on , I/O-5 can be switched for
use as a system clock output pin.
VDD
13
AMIN
14
FMIN
Programmable
counter input
These pin input FM and AM band local
oscillator
signals
by
capacitor
coupling. FMIN and AMIN operate at
low amplitude.
VDD
16
I/O-
9/IFIN2
17
I/O-
8/IFIN1
General-purpose
I/O ports/General-
purpose
counter
frequency
measurement
input
General-purpose I/O port input/output
pins. Can be switched for use as input
pins to measure general-purpose
counter frequencies. The frequency
measurement function has such uses
as measuring intermediate
frequencies (IF).
These pins feature built-in amps. Data
are input by capacitor coupling. FMIN
and AMIN operate at low amplitude.
(note) Pins are set for input when
power is turned on.
VDD
(To be continued)


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