LS656 ,TELEPHONE SPEECH CIRCUIT WITH MULTIFREQUENCY TONE GENERATOR INTERFACEelectrical characteristics can be controlled by stabilized voltage to the digital chip and deli-
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LS656AB ,Telephone speech circuit with multifrequency tone generator interfaceS G S-THONSON 07E D I 7513:1237 DDLBEES B ll
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LS656B ,TELEPHONE SPEECH CIRCUIT WITH MULTIFREQUENCY TONE GENERATOR INTERFACES G S-THONSON 07E D I 7513:1237 DDLBEES B ll
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LS7030 , 8 DECADE MULTIPLEXED COUNTER
LS7031 , 6 DECADE MOS UP COUNTER WITH 8 DECADE LATCH AND MULTIPLEXER
LS7060 , 32 BIT/DUAL 16 BIT BINARY UP COUNTER WITH BYTE MULTIPLEXED THREE-STATE OUTPUTS
LT1640H ,Negative Voltage Hot Swap Controller
LT1640H ,Negative Voltage Hot Swap Controller
LT1640LIS8#PBF ,Negative Voltage Hot Swap Controller
LT1640LIS8#TRPBF ,Negative Voltage Hot Swap Controller
LT1641 ,Positive High Voltage Hot Swap Controller
LT16411CS8 ,Positive High Voltage Hot Swap Controllers
LS656-LS656AB-LS656B
TELEPHONE SPEECH CIRCUIT WITH MULTIFREQUENCY TONE GENERATOR INTERFACE
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TELEPHONE SPEECH CIRCUIT WITH MULTIFREt2UENCY
TONE GENERATOR INTERFACE-
The L8656 is a monolithic integrated circuit in sending and receiving amplifiers to compen-
16-Iead plastic package to replace the hybrid sate for line attenuation by sensing either the
circuit in telephone set. It works with the same line current or the line voltage. In addition,
type of transducers for both transmitter and the 1.8656 can also work in fixed gain mode'.
receiver (typically dynamic capsules). Many of
its electrical characteristics can be controlled by stabilized voltage to the digital chip and deli-
meals. ofexternal components to meet different vering to the line the MF tones generated by
specifications. the M761.
In addition to the speech operation, the L8656
acts as an interface for the MF tone signal (par.
ticularly for M761 C/MOS frequency synthesizer).
The CS656 basic functions are the following:
- It presents the proper DC path for the line
current, particular care being paid to have low
voltage drop.
- It acts as linear interface for MF, supplying a
DIP-16 Plastic
' . . ORDERING NUMBER: LSBSBB
- It handles the vonce signal, performing the 2/4 V LS656AB
wires interface and changing the gain on both
BLOCK DIAG RAM
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ABSOLUTE MAXIMUM RATINGS
Vi.. Line voltage (3 ms pulse duration) 22 V
IL Forward line current 150 mA
IL Reverse line current -150 mA
Ptot Total power dissipation at Tamb; 70°C 1 W
W Operating temperature -45 to 70 °C
Tag, T, Storage and junction temperature -65 to 150 °C
CONNECTION DIAGRAM
(top view)
MIC. INPUT MK:.lNPUt
.LINE mo
murme MFiNPUt
BIAS MU. RECEIVER output
gwgsnao. RECEIVER OUTPUT
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GAIN CONTROL -LINE
THERMAL DATA _
Rm Hmb Thermal resistance junction-ambient max 80 °C/W
0498 p-os 362
