ISDN S-Interface Dual Transformer
Compatible With AT&T T7256
Turns Ratio Pins 1-4:16-13 & 5-8:12-9
PARAMETER
Open Circuit Inductance
1-4
(1)
5-8
(2)
Leakage Inductance
1-4
(1)
Short 16-13
5-8
(2)
Short 12-9
Interwinding Capacitance (C
W/W
)
1-4
(1)
& 16-13
(3)
5-8
(2)
& 12-9
(4)
Distributed Parallel Capacitance
1-4
(1)
5-8
(2)
Primary DC Resistance: 1-4
(1)
; 5-8
(2)
Secondary DC Resistance:16-13 ;12-9
Isolation (HI-POT)
2400
MIN.
22
MAX.
1:2.5 & 1:2.5
UNITS
mHy
SCHEMATIC DIAGRAM
PRI
SE C
4
4
µHy
µHy
100
100
pF
pF
180
100
2.30
5.80
pF
pF
ohms
ohms
V
RMS
MEETS THE PULSE WAVEFORM TEMPLATE OF CCITT I.430.
O
Primary is Line Side
O
Unbalanced current at TE:
∆
Idc = 1 mAmax.
O
Longitudinal Conversion Loss - 10KHz
to 300 KHz: 60dB min.
Package Dimensions in Inches (mm)
Flammability: Materials used in the
production of these units are UL94-VO
and meet requirements of IEC 695-2-2
needle flame test.
Parts shipped in anti-static
trays. 40 pieces per tray
Oscillation Voltage = 500mV
Oscillation Frequency = 10.0 KHz
1. Connect 2 & 3
2. Connect 6 & 7
RHOMBUS P/N:
T-13506
CUST P/N:
DATE:
3/24/94
NAME:
SHEET:
1 OF 1
Rhombus
Industries Inc.
Transformers & Magnetic Products
www.rhombus-ind.com
15801 Chemical Lane,
Huntington Beach, CA 92649-1595
Phone: (714) 898-0960 FAX: (714) 896-0971