TISP4A270H3BJ_07 Datasheet, PDF (1/9 Pages) Bourns Electronic Solutions – ASYMMETRICAL-BIDIRECTIONAL THYRISTOR SPD

*RoHS ^COMPLIANT
TISP4A270H3BJ
ASYMMETRICAL-BIDIRECTIONAL THYRISTOR SPD
TISP4A270H3BJ LCAS R_LINE Protector
Optimized LCAS RLINE Protector
TISP4A270H3BJ V(BO) Derived from:
-Break Switch, SW1 & SW2, Ratings
-Ring Return Switch, SW3, Rating
-Ringing Access Switch, SW4, Rating
-Switch Isolation Ratings
-Battery Voltage Range of -40 V to -60 V
-Power Fault Conditions
-Lightning Impulse Conditions
-LCAS Characteristic Temperature Range
TISP4A270H3BJ Designed for:
-Battery-Backed Ringing Circuits
Voltage Swing . . . . . .+148 V to -206 V
Allows . . . . . . . . . . .103 V rms Ringing with -60 V Battery
Temperature Range . .-40 °C to +85 °C
Device
‘4A270
V_DRM
V
+160
-222
V_(BO)
V
+217
-270
Rated for International Surge Wave Shapes
Wave Shape
Standard
I_PPSM
A
2/10
GR-1089-CORE 500
10/700
ITU-T K.20/45/21 150
10/1000
GR-1089-CORE 100
.......................................UL Recognized Component
SMB Package (Top View)
G1
2R
MD4A270B
Device Symbol and Circuit Application
'7581 LCAS
TI SP4 165H3
TI P
T _LINE
G
SW3
Ring
return
switch
RING
R
R_LINE
TISP4A270H3
SW4
Ringing
access
switch
SW1
Break
switch
SW2
Break
switch
T _BAT
F_GND
V _BAT
R_BAT
V _DD
LA TC H
INPUT
D_GND
AI4BITAMA
R _{RIN GI NG}
T _{RING I NG}
T_SD
Description
The TISP4A270H3BJ is an asymmetrical-bidirectional thyristor surge protective device (SPD). It is designed to limit the peak voltages on
the R_LINE (Ring Line) terminal of ‘7581/2/3 LCAS (Line Card Access Switch) devices. The TISP4A270H3BJ must have the bar-indexed
terminal 1 (G) connected to the protective ground and terminal 2 (R) connected to the R_LINE terminal.
The TISP4A270H3BJ voltages are chosen to give RLINE terminal protection for all LCAS switch conditions. The most potentially stressful
condition is low level power cross when the switches are closed. Under this condition, the TISP4A270H3BJ limits the voltage and
corresponding LCAS dissipation until the LCAS thermal trip operates and opens the switches.
Under open-circuit ringing conditions, the R_LINE terminal will have high peak voltages. For battery backed ringing, the R_LINE terminal will
have a larger peak negative voltage than positive, i.e. the peak voltages are asymmetric. The TISP4A270H3BJ has a similar voltage
asymmetry which will allow the maximum possible ringing voltage, while still giving protection. With a connected telephone line, the
LCAS T_LINE (Tip Line) terminal voltage levels will be less than 50 % of the open-circuit R_LINE terminal values. So the T_LINE terminal can be
protected by a symmetrical-bidirectional overvoltage protector of the TISP4xxxH3BJ series.
How To Order
Device
Package
TISP4A270H3BJ BJ (SMB/DO-214AA with J-Bend)
Carrier
R (Embossed Tape Reeled)
Order As
TISP4A270H3BJR-S
*RoHS Directive 2002/95/EC Jan 27 2003 including Annex
APRIL 2002 - REVISED JANUARY 2007
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.