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TDB7722STN/a3avaiSubscriber Line Interface Circuit Kit


TDB7722 ,Subscriber Line Interface Circuit KitF MU©E§©EL SGS-IHOMSON ELE©TE3©MH©$ TDB7711 TDB7722 SUBSCRIBER LINE INTERFACE CIRCUIT KI ..
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TDB7722
Subscriber Line Interface Circuit Kit
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ffiffir [ijij[jt)rciil(5EUE(iC)e0Tir'lC()])Wl](C)e) TDB7722
SUBSCRIBER LINE INTERFACE CIRCUIT KIT
n PROGRAMMABLE DC FEEDING RESIS-
TANCE AND LIMITING CURRENT (seven
values)
LONGITUDINAL BALANCE PERFORMANCE '.
UP TO 63 dB
n FOUR OPERATING MODES (power-down,
stand-by, conversation, ringing control)
POWER SAVING FEATURE
SIGNALLING FUNCTION (off-hook/ground key)
HYBRID FUNCTION .
. EXTERNAL RINGING ALLOWING BALANCED Multiwatt 15
AND UNBALANCED RINGING WITH ZERO
CROSSING INJECTION AND RING TRIP DE-
TECTION
:1 AUTOMATIC RINGING STOP WHEN OFF-
HOOK IS DETECTED
11 LOW POWER CURRENT CONSUMPTION IN
STAND-BY MODE (90 mW)
n LOW NUMBER OF EXTERNAL COMPO-
NENTS. THESE COMPONENTS REQUIRE
ONLY STAN DARD TOLERANCE : 1 % RESIS- PLCC28
TORS AND 10-20 % CAPACITORS
u POSSIBILITY TO WORK WITH HIGH COM-
MON MODE CURRENTS
n TELETAXE ,
u ANALOG INPUT/OUTPUT ORDER CODES 'Pit)',',',',)):))," 15)
(DIP28)
" GENERAL PURPOSE BIT TDB7711 (PLCC28)
n INTEGRATED THERMAL PROTECTION
PIN CONNECTION
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TDB7711 TDB7722
June 1989 1/18
TDB7711-TDB7722
DESCRIPTION
The ST SLIC KIT (TDB7722/7711) is a set of solid
state devices designed to integrate the main func-
tions needed to interface a telephone line.
It consists of 2 integrated devices : the TDB7722 line
interface circuit and the TDB7711 control unit. This
kit performs main of the BORSHT functions :
- Battery feed
- Overvoltage protection with double trisil device
and 2 protection resistors
- Ringing control
- Signalling
- Hybrid
ABSOLUTE MAXIMUM RATINGS
The ST SLIC KIT has been designed to achieve per-
formant transmission characteristics like excellent
longitudinal balance and very low consumption.
In addition, this kit controls an external ringing relay
with zero crossing injection.
This kit is fabricated using a 80 V Bipolar, junction
isolated technology, with accurate thin film resistors
for the TDB7722 and a 10 V Bipolar l2L technology
for TDB7711.
This kit is suitable for all applications, co or PBX,
where balanced or unbalanced ringing are re-
quested.
Symbol Parameter Value Unit
Vt, Negative Battery Voltage 72 V
Vdd Positive Supply Voltage + 5.5 V
l/ss Negative Supply Voltage - 5.5 V
Vagnd-ngnd Maximum Voltage Between Analog GND and Battery GND k 2 V
Ti Maximum Junction Temperature + 150' 'C
Tstg Storage Temperature - 55' to 150' 'C
THERMAL DATA
TDB7722 HIGH VOLTAGE
Rthjc Max. Resistance Junction to Case 3 'C/W
Rthja Max. Resistance Junction to Ambient 40 'C/W
TDB7711 LOW VOLTAGE
Rma Max. Resistance Junction to Ambient 80 'C/W
OPERATING RANGE
Symbol Characteristics Min. Typ. Max. Unit.
Toper Operating Temperature Range 0 70 C
I/to- Negative Battery Voltage - 72 - 20 V
Vdd Positive Supply Voltage + 4.5 + 5.5 V
l/ss Negative Supply Voltage - 5.5 - 4.5 V
lmax Total Line Current 120 mA
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