Token Ring Isolation Transformers
ELECTRONICS INC.
EPA1550-X & EPA1550-X-LF
• Designed for IBM and Token Ring for 16 MHz Applications
• Hipot : 500 Vrms (in compliance with LAN’s Safety Requirements)
• Available in Single and Dual Low Profile Thru-Hole Packages
• Add “-LF” after part number for Lead Free
• Storage Temperature : -40°C to +125°C
• Operating Temperature : 0°C to +70°C
• IEEE 802.5 Compatible
Electrical Parameters @ 25° C
PCA
Part
Number
EPA1550-1(-LF) [Single]
EPA1550-2(-LF) [Dual]
EPA1550-3(-LF) [Single]
EPA1550-4(-LF) [Dual]
EPA1550-5(-LF) [Dual]
OCL
(µH Ref.)
@ 100 KHz, 100 mV
750
750
250
250
400 Min.
Interwinding
Capacitance
(pF Max.)
25
25
15
15
30
Leakage
Inductance
(µH Max.)
0.20
0.20
0.15
0.15
0.03
Insertion Loss
(dB Max.)
@ 10 MHz
0.5
0.5
0.5
0.5
0.5
Return Loss
(dB Min.)
@ 5 MHz
20
20
20
20
20
CMR
(dB Min.)
@ 1.0 MHz
-60
-60
-60
-60
-60
DCR
(Ω Max.)
Pri.
Sec.
1.0
1.0
0.55
0.55
0.4
1.0
1.0
0.85
0.85
0.8
• Hipot :
500 Vrms Between Pri. and Sec. Windings & also from Coil to Coil in Dual Package [EPA1550-5 is Wdg to Wdg]
•
• Turns Ratio for EPA1550-1 & 2 :
1:1:1:1 ± 5%
•• Turns Ratio for EPA1550-3 & 4 :
1:1:2:2 ± 5%
• Turns Ratio for EPA1550-5 :
2:9:22 ± 5%
•
.500
1.00 Max.
Max.
(25.40)
(12.70)
16
9
.385
PCA
.500
Max.
EPA1550-2(-LF)
Dual 16 Pin Package
Marking :
Max.
D.C.
Single 8 Pin Package
1
8
(9.78)
PCA
(12.70)
EPA1550-1(LF)
.015
D.C.
.120 ± .020
.250 Max. (.381)
(.305 ± .508)
.015
(6.35)
.120 ± .020
.250 Max. (.381)
(.305 ± .508)
(6.35)
.300
.100
#24 TC
(7.62)
(2.54)
.300
.100
#24 TC
(7.62)
(2.54)
1.00 Max.
(25.40)
Dual 20 Pin
Schematic
20
19
1
2
3
4
5
6
7
8
9
10
12
11
18
17
16
15
14
13
1
2
3
4
5
6
7
8
Dual 16 Pin
Schematic
16
15
14
13
12
11
10
9
1
2
3
4
Single 8 Pin
Schematic
5
6
7
8
20
11
.400
PCA
Max.
EPA1550-5(-LF)
1
D.C.
(10.16)
10
Dual 20 Pin Package
.120 ± .020
(.305 ± .508)
Pin 1 I.D.
.018
.250 Max. (.457)
(6.35)
.100
(2.54)
Notes :
1. Lead Finish
2. Peak Temperature Rating
3. Moisture Sensitive Levels
4. Weight
5. Packaging Information
(Tubes for -1 & -3)
(Tubes for -2, -4 & -5)
#24 TC
EPA1550-X
SnPb
260°C
.300
(7.62)
EPA1550-X-LF
Hot Tin Dip (Sn)
260°C
(Unlimited,
≤30°C/60%RH)
(Unlimited,
≤30°C/60%RH)
MSL = 1
MSL = 1
1.318 grams (-1)
46 pieces/tube
24 pieces/tube
1.318 grams (-1)
46 pieces/tube
24 pieces/tube
Unless Otherwise Specified Dimensions are in Inches /mm ± .010 /.25
PCA ELECTRONICS, INC.
16799 SCHOENBORN ST.
NORTH HILLS, CA 91343
Product performance is limited to specified parameters. Data is subject to change without prior notice.
CSA1550-X & -LF
Rev. 1
8/20/07 RR
TEL: (818) 892-0761
FAX: (818) 894-5791
http://www.pca.com
PCA [ PCA ELECTRONICS INC. ]
