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L3924A中文资料
L3924A数据手册规格书PDF详情
DESCRIPTION
The device consists of the speech and the dialer. It provides the DC line interface circuit that terminates the telephone line, analog amplifier for speech transmission and necessary signals for either DTMF or loop disconnect (pulse) dialing.
SPEECH CIRCUIT
■ 2 TO 4 WIRES CONVERSION
■ PRESENT THE PROPER DC PATH FOR THE LINE CURRENT AND THE FLEXIBILITY TO ADJUST IT AND ALLOW PARALLEL PHONE OPERATION
■ PROVIDES SUPPLY WITH LIMITED CURRENT FOR EXTERNAL CIRCUITRY
■ SYMMETRICAL HIGH IMPEDANCE MICROPHONE INPUTS SUITABLE FOR DYNAMIC ELECTRET OR PIEZOELECTRIC TRANSDUCER
■ ASYMMETRICAL EARPHONE OUTPUT SUITABLE FOR DYNAMIC TRANSDUCER
■ LINE LOSS COMPENSATION
■ INTERNAL MUTING TO DISABLE SPEECH DURING DIALING
■ HOLD FUNCTION FOR PARALLEL PHONE WITH 400ms DELAY TO PREVENT FALSE RELEASE
DIALER CIRCUIT
■ 32 DIGITS FOR LAST NUMBER REDIAL BUFFER
■ 18 DIGITS FOR 13 MEMORY REDIAL
■ ALLOW MIXED MODE DIALING IN EITHER TONE OR PULSE MODE
■ PACIFIER TONE PROVIDES AUDIBLE INDICATION OF VALID KEY PRESSED IN A BUZZER OR/AND IN THE EARPHONE
■ TIMED PABX PAUSE
■ FLASH INITIATES TIMED BREAK: MASK OPTIONS WITH 585ms,300ms,100ms
■ CONTINUOUS TONE FOR EACH DIGIT UNTIL KEY RELEASE
■ USES INEXPENSIVE 3.579545MHz CERAMIC RESONATOR
■ POWERED FROM TELEPHONE LINE, LOW OPERATING VOLTAGE FOR LONG LOOP APPLICATION
L3924A产品属性
- 类型
描述
- 型号
L3924A
- 制造商
STMICROELECTRONICS
- 制造商全称
STMicroelectronics
- 功能描述
SPEECH AND 14 MEMORY DIALER WITH HOLD FUNCTION
供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
---|---|---|---|---|---|---|---|
STM |
09+ |
SOP-28 |
4411 |
只售全新原装货真实实数现货放心 |
|||
ST |
10+ |
SOP-28 |
7800 |
全新原装正品,现货销售 |
|||
STM |
24+ |
SOP-28 |
210 |
||||
ST |
25+ |
SOP |
3200 |
绝对原装自家现货!真实库存!欢迎来电! |
|||
ST |
22+ |
SOP28 |
5000 |
原装现货库存.价格优势!! |
|||
ST |
25+ |
SOP28 |
2987 |
只售原装自家现货!诚信经营!欢迎来电! |
|||
ST/意法 |
23+ |
SOP28 |
50000 |
全新原装正品现货,支持订货 |
|||
ST |
00+ |
SOP28 |
4693 |
一级代理,专注军工、汽车、医疗、工业、新能源、电力 |
|||
ST |
23+ |
SOP28 |
7193 |
原厂原装正品 |
|||
ST/意法 |
24+ |
NA/ |
3411 |
原装现货,当天可交货,原型号开票 |
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