T-718

HDSL Line Interface Transformers
Available in Thru-hole and Surface Mount Versions
Surge Voltage Capability
Metallic
Voltage: 800 V peak, 10/700 µS
Operating Temperature
Range -400C to +850C
Primary is Line Side
Secondary is Chip Side
Longitudinal
Voltage: 2400 V peak, 10/560 µS
Manufacturer I.C.
Name
P/N
Brooktree
BT8921
Bit
Rate
784
Transformer
P/N
T-882
Brooktree
BT8921
1168
T-883
Brooktree
BT8952
784
T-718
Brooktree
BT8952
1168
T-717
Level One
SK7074
784
T-977
Level One
SK7074
1168
T-848
Electrical Specifications at 25 C
O
Parameter
T-977
T-848
T-718
T-717
T-882
T-883
Turns Ratio (1)
1:1.8
1:1.8
2:1:1
2:1:1
1:1:1
1:1:1
Inductance (2)
2.75
2.06
3.00
2.00
3.00
2.00
mH
DC Resistance Pri
3.0
2.0
2.2
2.2
2.2
2.2
Ω
DC Resistance Sec
3.2
2.0
4.4
4.4
2.2
2.2
Ω
D.C. Current
75
75
160
160
70
70
mA
Longitudinal Balance
50
50
55
55
55
55
dB
Return Loss
20.0
16.5
20.0
16.5
20.0
16.5
dB
Harmonic Distortion
-75
-75
-75
-75
-75
-75
dB
2000
2500
1500
1500
1500
1500
VRMS
A
B
C
C
C
C
Isolation
Schematic Style
Schematic "A"
Units
SEC
PRI
Schematic "B"
SEC
PRI
1. Chip Side (Primary) to Line side (Secondary)
2. Line side
3. For all parts, unused Pin # 5 can be removed for keying to printed circuit board. Add suffix "-9"
Schematic "C"
PRI
SEC
Refer to Individual Data Sheets for test conditions & additional information
RS2311 Package Dimensions in inches (mm)
.470
(11.94)
MAX.
.100
(2.54)
MIN.
10
.040
(1.02)
TYP.
.920
(23.37)
MAX.
.150
(3.81)
TYP.
1.070
(27.18)
REF. .900
(22.86)
REF.
1.070
(27.18)
REF. .900
(22.86)
REF.
.570
(14.48)
MAX.
1
1
9
2
2
8
3
3
8
7
4
4
7
6
5
5
6
Terminal Dimensions
.020 (.051) X .040 (1.02) Typical.
Bottom View
Top View
.040
(1.02)
TYP.
10
9
.920
(23.37)
MAX.
.800
(20.32)
.470
(11.94)
MAX.
Termination Numbers for Reference Only.
T-977
T-977-9
T-977G
T-977-9G
1.19
(30.23)
.090
(2.29)
TYP.
Part Number Examples:
.150
(3.81)
TYP.
1.10 (27.94)
1.04 (26.42)
.150
(3.81)
(10-Pin Thru-hole)
(Thru-hole, Pin 5 Removed)
(10-Pin SMD)
(SMD, Pin 5 Removed)
.080
(2.03)
.180
(4.57)
Specifications subject to change without notice.
Rhombus
Industries Inc.
For other values & Custom Designs, contact factory.
22
HDSL-RS - 4/99
15801 Chemical Lane, Huntington Beach, CA 92649-1595
Tel: (714) 898-0960 • Fax: (714) 896-0971