L3240中文資料意法半導體數(shù)據(jù)手冊PDF規(guī)格書
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DESCRIPTION
L3240 is a monolithic integrated circuit designed to replace the mechanical bell in telephone sets, in connection with an electro acoustical converter.The device can drive either directly a piezo ceramic converter (buzzer) or a small loudspeaker. In this case a transformer is needed. The two tone frequencies generated are switched by an internal oscillator in a fast sequence and made audible across output amplifiers in the transducer; both tone frequencies and the switching frequency can be externally adjusted.
. LOW CURRENT CONSUMPTION, IN ORDER TO ALLOW THE PARALLEL OPERATION OF 4 DEVICES
. INTEGRATED RECTIFIER BRIDGE WITH ZENER DIODES TO PROTECT AGAINST OVERVOLTAGES
. LITTLE EXTERNAL CIRCUITRY
. TONE AND SWITCHING FREQUENCIES AD JUSTABLE BY EXTERNAL COMPONENTS
. INTEGRATED VOLTAGE AND CURRENT HYSTERESIS
. COMPLEMENTARY OUTPUT CONFIGURATION
| 供應商 | 型號 | 品牌 | 批號 | 封裝 | 庫存 | 備注 | 價格 |
|---|---|---|---|---|---|---|---|
ST |
24+ |
DIP-8 |
1850 |
詢價 | |||
ST/意法 |
24+ |
DIP-8 |
60000 |
詢價 | |||
ST |
22+ |
原廠原封 |
16900 |
支持樣品,原裝現(xiàn)貨,提供技術(shù)支持! |
詢價 | ||
ST/意法 |
2450+ |
SOP8 |
6540 |
只做原廠原裝正品終端客戶免費申請樣品 |
詢價 | ||
ST |
2511 |
DIP-8 |
16900 |
電子元器件采購降本 30%!盈慧通原廠直采,砍掉中間差價 |
詢價 | ||
ST |
22+ |
SOP8 |
5000 |
詢價 | |||
ST/意法 |
2022+ |
SOP-8 |
30000 |
進口原裝現(xiàn)貨供應,原裝 假一罰十 |
詢價 | ||
ST/意法 |
23+ |
SOP8 |
13000 |
原廠授權(quán)一級代理,專業(yè)海外優(yōu)勢訂貨,價格優(yōu)勢、品種 |
詢價 | ||
STM |
10+ |
DIP-8 |
7800 |
全新原裝正品,現(xiàn)貨銷售 |
詢價 | ||
ST |
2447 |
SOP8 |
100500 |
一級代理專營品牌!原裝正品,優(yōu)勢現(xiàn)貨,長期排單到貨 |
詢價 |
