參數(shù)資料
型號(hào)： L3936A
廠商： 意法半導(dǎo)體
英文描述： Speech and 14 Memory Dialer With LED Driver(語(yǔ)音電路和14個(gè)存儲(chǔ)器的撥號(hào)器帶LED驅(qū)動(dòng)器)
中文描述： 語(yǔ)音和14記憶體，LED驅(qū)動(dòng)器（語(yǔ)音電路和14個(gè)存儲(chǔ)器的撥號(hào)器帶的LED驅(qū)動(dòng)器撥號(hào)器）
文件頁(yè)數(shù)： 4/15頁(yè)
文件大?。?/td> 199K
代理商： L3936A
IREF
Pin 13. An external resistor of 3.6kOhm con-
nected between IREF and GND will set the inter-
nal current level. Any change of this resistorvalue
will influence the microphone gain, DTMF gain,
earphone gainand sidetone.
V
CC
Pin 14, V
CC
is the positive supply of the speech
network. It is stabilized by a decouplingcapacitor
between V
CC
and GND. The V
CC
supply voltage
may also be used to supply external peripheral
circuits.
LED
Pin 15. Lighted dial indicator. The LED connected
to this pin will light up when the telephone is off-
hook and consuming25% of theline current.
I
LINE
Pin 16. A recommended external resistor of
20ohm is connected between I
LINE
and GND.
Changing this resistor valuewill have influenceon
microphone gain, DTMF gain, sidetone,maximum
outputswing on LN and on the DC characteristics
(especiallyin the lowvoltage region).
LN
Pin 17. LN is the positive line terminal of the de-
vice.
REG
Pin 18. The internal voltage regulator has to be
decoupled by a capacitor from REG to GND. The
DC characteristics can be changed with an exter-
nal resistor connected between LN and REG or
betweenREG and I
LINE
.
GTX, MIC–, MIC+
GTX (pin 19), MIC– (pin 20) and MIC+ (pin 21).
The one chip phone has symmetrical microphone
inputs.The amplification from microphone inputsto
LN is 51.5dB and it can be adjusted between 43.5
and 51.5dB.The amplification is proportionalto ex-
ternalresistor connectedbetweenGTXand REG.
GDTMF
Pin 22. When the DTMF input is enabled, the mi-
crophoneinputs and the receive amplifier input will
be muted and the dialing tone will be sent to the
line. The voltage amplification from GDTMF to LN
is 40dB. Final ouput level on LN can be adjusted
via
the external resistor connected between
GDTMF and GND through a decoupling capaci-
tor. A confidence tone is sent to the earphone
during tone dialing. The attenuation of the confi-
dence tone from LN to Vear is –32dB typically.
V
DD
Pin 23. V
DD
is the positive supply for the dialing
network and must meet the maximum and mini-
mum voltage requirements.
DEVICEOPERATION
During on-hook all keypad inputs are high imped-
ance internally and it requiresvery low current for
memory retention. At anytime, Row and Column
inputs assume opposite states at off-hook. The
circuit verifies that a valid key has been entered
by alternately scanning the Row and Column in-
puts. If the input is stillvalid following 32ms of de-
bounce, the digit is stored into memory, and dial-
ing
begins
after
a
approximately 40ms (measured from the initial
key closure). Output tone duration is shown in Ta-
ble1.
The device allows manual dialing of an indefinite
number of digits, but if more than 32 digits are di-
aled, it will ”wrap around”. That is, the extra digits
beyond 32 will be stored at the beginningof LND
buffer, and the first 32 digits will no longer be
availablefor redial.
pre-signal
delay
of
Table 2:
DTMF Output Frequency
Key Input
Stadard
Frequency
697
770
852
941
1209
1336
1477
Actual
Frequency
699.1
766.2
847.4
948.0
1215.9
1331.7
1471.9
% Deviation
ROW 1
ROW 2
ROW 3
ROW 4
COL 1
COL 2
COL 3
+0.31
–0.49
–0.54
+0.74
+0.57
–0.32
–0.35
NORMAL DIALING
D1
Normal dialing is straighforward, all keyboard en-
tries will be stored in the buffer and signaled in
succession.
D2
D3
....etc
PROGRAMMING AND REPERTORY DIALING
To program, enter the following:
PROG D1 D2 D3.. . Dn MEM (Location0-9)
or
PROG
D1
D2. . . .Dn
During programming, dialing is inhibited.
E1-E3
FUNCTION PIN DESCRIPTION
(continued)
L3916A - L3926A - L3936A
4/15
相關(guān)PDF資料
PDF描述
L4620 LIQUID LEVEL ALARM
L465 LINEAR INTEGRATED CIRCUITS
L465A LINEAR INTEGRATED CIRCUITS
L4705 VERY LOW DROP VOLTAGE REGULATORS
L4785 CAP CER .68UF 25V Y5V 1206
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L3936AD 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Telephone Speech Circuit
L3936AN 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:SPEECH AND 14 MEMORY DIALER WITH LED DRIVER
L-394 制造商:RHOMBUS-IND 制造商全稱(chēng):Rhombus Industries Inc. 功能描述:Common Mode Inductor
L-395-12 制造商:ETC MOLEX-INACTIVE 功能描述:Cross Referenced to MOLEX - Part: MOL19193-0372
L395-12 制造商:Molex 功能描述:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*