IC Phoenix
 
Home ›  LL68 > LS1240A-LS1240A+-LS1240AD1,Electronic tone ringer with built-in bridge rectifier. Supply voltage Vs=26V. Current consumption without load Ib=1.5A(typ). Activation voltage Von=12V(min),13.5V(max). Sustaining voltage Voff=7.8V(min),9.3V(max).
LS1240A-LS1240A+-LS1240AD1 Fast Delivery,Good Price
Part Number:
If you need More Quantity or Better Price,Welcom Any inquiry.
We available via phone +865332716050 Email
Partno Mfg Dc Qty AvailableDescript
LS1240APHILIPS N/a158avaiElectronic tone ringer with built-in bridge rectifier. Supply voltage Vs=26V. Current consumption without load Ib=1.5A(typ). Activation voltage Von=12V(min),13.5V(max). Sustaining voltage Voff=7.8V(min),9.3V(max).
LS1240ASTMN/a50avaiElectronic tone ringer with built-in bridge rectifier. Supply voltage Vs=26V. Current consumption without load Ib=1.5A(typ). Activation voltage Von=12V(min),13.5V(max). Sustaining voltage Voff=7.8V(min),9.3V(max).
LS1240ASUMN/a45avaiElectronic tone ringer with built-in bridge rectifier. Supply voltage Vs=26V. Current consumption without load Ib=1.5A(typ). Activation voltage Von=12V(min),13.5V(max). Sustaining voltage Voff=7.8V(min),9.3V(max).
LS1240AUTCN/a23000avaiElectronic tone ringer with built-in bridge rectifier. Supply voltage Vs=26V. Current consumption without load Ib=1.5A(typ). Activation voltage Von=12V(min),13.5V(max). Sustaining voltage Voff=7.8V(min),9.3V(max).
LS1240AD1STN/a800avaiELECTRONIC TWO-TONE RINGER
LS1240ATG/UTCN/a406avaiElectronic tone ringer with built-in bridge rectifier. Supply voltage Vs=26V. Current consumption without load Ib=1.5A(typ). Activation voltage Von=12V(min),13.5V(max). Sustaining voltage Voff=7.8V(min),9.3V(max).
LS1240ALSN/a99avaiElectronic tone ringer with built-in bridge rectifier. Supply voltage Vs=26V. Current consumption without load Ib=1.5A(typ). Activation voltage Von=12V(min),13.5V(max). Sustaining voltage Voff=7.8V(min),9.3V(max).
LS1240ALSI N/a300avaiElectronic tone ringer with built-in bridge rectifier. Supply voltage Vs=26V. Current consumption without load Ib=1.5A(typ). Activation voltage Von=12V(min),13.5V(max). Sustaining voltage Voff=7.8V(min),9.3V(max).
LS1240AN/AN/a10avaiElectronic tone ringer with built-in bridge rectifier. Supply voltage Vs=26V. Current consumption without load Ib=1.5A(typ). Activation voltage Von=12V(min),13.5V(max). Sustaining voltage Voff=7.8V(min),9.3V(max).
LS1240AST8N/a1547avaiElectronic tone ringer with built-in bridge rectifier. Supply voltage Vs=26V. Current consumption without load Ib=1.5A(typ). Activation voltage Von=12V(min),13.5V(max). Sustaining voltage Voff=7.8V(min),9.3V(max).
LS1240ASTN/a1547avaiElectronic tone ringer with built-in bridge rectifier. Supply voltage Vs=26V. Current consumption without load Ib=1.5A(typ). Activation voltage Von=12V(min),13.5V(max). Sustaining voltage Voff=7.8V(min),9.3V(max).
LS1240AN/a3950avaiElectronic tone ringer with built-in bridge rectifier. Supply voltage Vs=26V. Current consumption without load Ib=1.5A(typ). Activation voltage Von=12V(min),13.5V(max). Sustaining voltage Voff=7.8V(min),9.3V(max).
LS1240A+ |LS1240AUTCN/a18avaiElectronic tone ringer with built-in bridge rectifier. Supply voltage Vs=26V. Current consumption without load Ib=1.5A(typ). Activation voltage Von=12V(min),13.5V(max). Sustaining voltage Voff=7.8V(min),9.3V(max).


LS1240A ,Electronic tone ringer with built-in bridge rectifier. Supply voltage Vs=26V. Current consumption without load Ib=1.5A(typ). Activation voltage Von=12V(min),13.5V(max). Sustaining voltage Voff=7.8V(min),9.3V(max).ABSOLUTE MAXIMUM RATINGSSymbol Parameter Value UnitV Calling Voltage (f = 50 Hz) Continuous 120 VAB ..
LS1240A ,Electronic tone ringer with built-in bridge rectifier. Supply voltage Vs=26V. Current consumption without load Ib=1.5A(typ). Activation voltage Von=12V(min),13.5V(max). Sustaining voltage Voff=7.8V(min),9.3V(max).BLOCK DIAGRAMFigure 1 : Test Circuit.42.72 ⋅ 10 f1 750R1 = ⋅ 1 - 0.04 ln f2 = 0.725 ..
LS1240A ,Electronic tone ringer with built-in bridge rectifier. Supply voltage Vs=26V. Current consumption without load Ib=1.5A(typ). Activation voltage Von=12V(min),13.5V(max). Sustaining voltage Voff=7.8V(min),9.3V(max).ABSOLUTE MAXIMUM RATINGSSymbol Parameter Value UnitV Calling Voltage (f = 50 Hz) Continuous 120 VAB ..
LS1240A ,Electronic tone ringer with built-in bridge rectifier. Supply voltage Vs=26V. Current consumption without load Ib=1.5A(typ). Activation voltage Von=12V(min),13.5V(max). Sustaining voltage Voff=7.8V(min),9.3V(max).BLOCK DIAGRAMFigure 1 : Test Circuit.42.72 ⋅ 10 f1 750R1 = ⋅ 1 - 0.04 ln f2 = 0.725 ..
LS1240A ,Electronic tone ringer with built-in bridge rectifier. Supply voltage Vs=26V. Current consumption without load Ib=1.5A(typ). Activation voltage Von=12V(min),13.5V(max). Sustaining voltage Voff=7.8V(min),9.3V(max).BLOCK DIAGRAMFigure 1 : Test Circuit.42.72 ⋅ 10 f1 750R1 = ⋅ 1 - 0.04 ln f2 = 0.725 ..
LS1240A+ ,Electronic tone ringer with built-in bridge rectifier. Supply voltage Vs=26V. Current consumption without load Ib=1.5A(typ). Activation voltage Von=12V(min),13.5V(max). Sustaining voltage Voff=7.8V(min),9.3V(max).ABSOLUTE MAXIMUM RATINGSSymbol Parameter Value UnitV Calling Voltage (f = 50 Hz) Continuous 120 VAB ..
LT1620 ,Rail-to-Rail Current Sense Amplifier
LT1620CGN#PBF ,Rail-to-Rail Current Sense Amplifier
LT1620IS8 ,Rail-to-Rail Current Sense Amplifier
LT1620IS8 ,Rail-to-Rail Current Sense Amplifier
LT1620IS8#PBF ,Rail-to-Rail Current Sense Amplifier
LT1627 , Micropower Low Dropout Regulators with Shutdown


LS1240A-LS1240A+-LS1240AD1
ELECTRONIC TWO-TONE RINGER
LS1240A
July 1998
ELECTRONIC TWO - TONE RINGER 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
DESCRIPTION

LS1240A is a monolithic integrated circuit designed
to replace the mechanical bell in telephone sets in
connection with an electro-acoustical converter. It
can drive directly a piezoceramic converter (buzz-
er)or a dynamic loudspeaker.
The output current capability of LS1240A is higher
than standard ringer. For driving a dynamic loud-
speaker LS1240A can simply use a decoupling ca-
pacitor, thus eliminating the usual transformer.
No current limitation is provided on the output stage
of LS1240A, so a minimum load DC of 50 Ω is ad-
viced, in series with a proper capacitor.
The two tone frequencies generated are switched
by an internal oscillator in a fast sequence and made
audible across an output amplifier in the loud-
speaker, both tone frequencies and the switching
frequency can be externally adjusted.
The supply voltage is obtained from the AC ring sig-
nal and the circuit is designed so that noise on the
line or variations of the ringing signal cannot affect
correct operation of the device.
ORDERING NUMBERS
PIN CONNECTION (top view)

1/7
Figure 1 : Test Circuit.
BLOCK DIAGRAM
LS1240A

2/7
ABSOLUTE MAXIMUM RATINGS
THERMAL DATA
ELECTRICAL CHARACTERISTICS
(Tamb = 25 °C; Vs = applied between pins 7-2 unless otherwise specified)

AC OPERATION
LS1240A

3/7
Figure 2 : Typical Application with BUZZER
Figure 3 : Typical Application with Loudspeaker (no transformer needed)
LS1240A

4/7
MINIDIP PACKAGE MECHANICAL DATA
LS1240A

5/7
SO8 PACKAGE MECHANICAL DATA
LS1240A

6/7
ic,good price


TEL:86-533-2716050      FAX:86-533-2716790
   

©2020 IC PHOENIX CO.,LIMITED