Datasheet > SC9257

SC9257

更新时间： 2024-02-23 10:43:39

品牌	Logo	应用领域
士兰微 - SILAN		/
页数	文件大小	规格书
28页	988K
描述
PLL FOR DTS

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中文翻译

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数据手册

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SC9257 数据手册

Silan

Semiconductors_ꢀ

SC9257

ꢀ

PLL FOR DTS

DESCRIPTION

The SC9257 is phase-locked loop (PLL) LSIs for digital tuning

systems (DTS) with built in 2 modulus prescalers.

All functions ate controlled through 3 serial bus lines. These LSIs

are used to configure high-performance digital tuning system.

DIP-20-300-2.54

FEATURES

* Optimal for configuring digital tuning systems in high-fi tuners

and car stereos.

* built-in prescalers. Operate at input frequency ranging from

30~150 MHz during FMIN input (with 2 modulus prescaler) and

at 0.5~40MHz during AMIN input (with 2 modulus prescaler or

direct dividing).

SOP-20-300-1.27

16 bit programmable counter, dual parallel output phase

comparator, crystal oscillator and reference counter.

4 N-channel open-drain output ports

(OFF withstanding voltage:12V) for such

uses as control signal output.

* 3.6MHz, 4.5MHz, 7.2MHz or 10.8MHz crystal oscillators can be

used.

* Standby mode function (turns off FM, AM

and IF amps) to save current

consumption.

* 15 possible reference frequencies. ( When using 4.5MHz crystal)

Built-in 20 bit general-purpose counter for such uses as

measuring intermediate frequencies (IFIN1 and IFIN2) and low-

frequency pilot signal cycles (SCIN).

* All functions controlled through 3 serial

bus lines.

* High-precision ( 0.55~ 7.15µs) PLL phase error detection.

* Numerous general-purpose I/O pins for such uses as peripheral

circuit control.

* CMOS structure with operating power

supply range of VDD=5.0 0.5V.

PIN CONFIGURATION

20 DO2

19 DO1

PERIOD

CLOCK

DATA

OT-1

18 I/O-7/SC_IN

17 I/O - 8/IF_IN1

16 I/O - 9/IF_IN2

15 GND

OT-2

14 FM_IN

OT-3

13 AM_IN

OT-4

VDD

I/O - 5/CLK 10

11 I/O-6

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

ꢀ

REV: 1.0

2001.10.18

12 3 4 5 6 7...28

中文翻译

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