UT23955 UMEC International Corporation, UT23955 Datasheet - Page 15

• Manufacturer Part Number: UT23955
• Manufacturer: UMEC International Corporation

Specifications of UT23955

• Operating Temp Range: 0C to 70C
• Package Type: DIP
• Mounting: Through Hole
• Pin Count: 14
• Interwinding Capacitance Max: 30/30pF
• Isolation Voltage (max): 1500VrmsV
• Lead Style: PC Pin
• Ocl Inductance (max): 0.8(Min)/0.8(Min)mH
• Operating Temperature Max Deg. C: 70C
• Operating Temperature Min Deg. C: 0C
• Primary Leakage Inductance (max): 0.5/0.5uH
• Product Depth (mm): 10.67mm
• Product Height (mm): 6.35mm
• Turns Ratio: 1:1.26CT/1.58:1
• Lead Free Status / RoHS Status: Supplier Unconfirmed

T1/E1/CEPT/ISDN-PRI Transformers
Application Notes
6.
*Specifications are subject to change without prior notice.
1.
2.
3.
4.
5.
UT23618 and UT23950: The fault locate winding is (7-8).
Extended Temperature Range Models: For extended temperature range transformers (-40
OCL(primary inductance), Cw/w (coupling capacitance), and L
In order To obtain 1CT:1 ratio from 1CT:2CT ratio , could use only one-half of the secondary (2CT) winding.
The turns ratio of these parts have been designed, in conjunction with semiconductor vendor recommendations to allow
Dual Ratio Transformer: These transformers have tapped secondary windings to provide two turns ratios. Use the entire
temperature range), OCL(Open Circuit Inductance for the primary winding ) is specified at both -40
40
and UT23836 which is 300uH minimum. All other parameters are specified at +25
is 0
connections to various terminations (e.g. 75 or 120 with the same transformer). For example UT23842 can be used with
the Siemens PEB 2235 to achieve connection to the 75 or 120 cable. For 75 termination, the PEB 2235 requires the
following turns ratio:1:1.57(Tx) and 1:1.26(Rx), which can be achieved using pins (1-2):(15-16) for Tx and (10-11):(5-8)
for Rx. For 120 , the following turns ratio are required: 1:2(Tx) and 1:1(Rx), which are pins (1-2):(16-14) for Tx and (9-
11):(5-8) for Rx on UT23842.
primary winding and connect the secondary pins listed below to obtain the desired turns ratio:
0
C, OCL is 600uH minimum for all low temperature models with the exception of UT23827 which is 800uH minimum
0
C to +70
UNIVERSAL MICROELECTRONICS CO.,LTD.
TEL:[phone] FAX:[phone]
0
C.
Model
Number
UT23038
UT23055
UT23044
UT23068
UT23389
UT23566
UT23568
UT23646
UT23664
UT23736
UT23766
UT23817
UT23826
UT23837
UT23839
UT23866
and
Ratio 1
Turns
1:1.58
1:1.08
1:1
1:1
1:1
1:1
1:2
1:2
1:2
1:2
1:1
1:1
1:1
1:1
1:1
1:1
1:1
1:1
1:1
1:1
1:1
Secondary
2-3/5-6
40-39
35-34
30-29
25-24
40-39
33-32
30-29
23-22
pins
2-3
3-5
2-3
2-3
3-5
3-5
2-3
2-3
2-3
3-5
3-5
2-3
L
(leakage inductance) are measured at the primary winding.
TAICHUNG,TAIWAN,R.O.C
3,27TH RD.,TAICHUNG INDUSTRIAL PARK,
Ratio 2
1:1.266
1:1.266
1:1.266
1:1.266
1:1.266
1:1.266
1:1.266
1:1.266
1:1.266
1:1.266
1:1.266
1:1.266
1:1.266
1:1.266
1:1.266
Turns
1:1.36
1:2.4
1:2.4
1:2.4
1:2.4
1:2
0
Secondary
C only. Standard Temperature Range
1-3/4-6
40-38
35-33
30-28
25-23
40-38
33-31
30-28
23-21
pins
1-3
1-5
1-3
1-3
1-5
1-5
1-3
1-3
1-3
1-5
1-5
1-3
DATA SHEET 01-23 FEB./06
0
C to +85
0
C and +25
15 OF 15
0
C operating
0
C. At -