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參數資料
| 型號： | MC44BS374T1AEFR2 |
| 廠商： | Freescale Semiconductor |
| 文件頁數： | 15/34頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AUDIO/VIDEO MODULATOR 16-SOIC |
| 標準包裝： | 1 |
| 類型： | NTSC/PAL 調制器 |
| 應用： | 音頻/視頻，VCR，機頂盒 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 16-SOIC N |
| 包裝： | 剪切帶 (CT) |
| 其它名稱： | MC44BS374T1AEFR2CT |
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MC44BS374T1/374T1A Advance Information
Modes of Operation
For test purposes, it is possible to disable the 263ms delay using Test Mode1-State1.h (this is called speed
up mode).
16.5 UHF Oscillator-VHF range
The UHF oscillator is fully integrated and does not require any external components.
For low frequency testing or VHF range operation (test mode 1, states 1.b to 1.e), the UHF oscillator can
be internally divided by: 2, 4, 8, or 16.
16.6 UHF PLL Section
The reference divider is a fixed divide-by-128, resulting in a reference frequency of 31.25KHz with a
4.0MHz crystal.
The prescaler is a fixed divide-by-8 and is permanently engaged.
The programmable divider division-ratio is controlled by the state of control bits N0 to N11.
The divider-ratio N for a desired frequency F (in MHz) is given by:
with:
NOTE:
Programming a division-ratio N=0 is not allowed.
16.7 Logic Output Port (LOP)
The LOP pin controls any logic function. The primary applications for the LOP are to control an external
attenuator or an external switch, between the antenna input and TV output. A typical attenuator application
with PIN diode is shown in Figure 7. The LOP pin switches the PIN attenuator depending on the signal
strength of the Antenna Input. This reduces the risks of intermodulation in certain areas. The LOP can also
be used as an OFF position bypass switch or for other logic functions in the application.
Figure 7. Typical Attenuator Application with Pin Diode
N
F
8
---
128
4
---------
×
=
N
2048
N11
×
1024
N10
×…… 4 N2
×
2
N1
×
N0
+
+++
=
LOP pin
Vcc
TV Out
Antenna
Input
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MC44BS374T1D | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:CMOS Audio/Video RF Modulators |
| MC44BS374T1D-R2 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:PLL Tuned UHF and VHF Audio/Video High Integration Modulator |
| MC44BS374T1EF | 功能描述:IC AUDIO/VIDEO MODULATOR 16-SOIC RoHS:是 類別:集成電路 (IC) >> 專用 IC 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:調幀器 應用:數據傳輸 安裝類型:表面貼裝 封裝/外殼:400-BBGA 供應商設備封裝:400-PBGA（27x27） 包裝:散裝 |
| MC44BS374T1EFR2 | 功能描述:IC AUDIO/VIDEO MODULATOR 16-SOIC RoHS:是 類別:集成電路 (IC) >> 專用 IC 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:調幀器 應用:數據傳輸 安裝類型:表面貼裝 封裝/外殼:400-BBGA 供應商設備封裝:400-PBGA（27x27） 包裝:散裝 |
| MC44C401 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:MTS Stereo Encoder |
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