4
4-123 Model 627 T
MODEL 627 T
CCITT V.35 Termination
Surface Mount
Resistor Networks
Thermal Shock plus Power Conditioning ∆R 0.70%
Short Time Overload ∆R 0.25%
Moisture Resistance ∆R 0.50%
Mechanical Shock ∆R 0.25%
Vibration Shock ∆R 0.25%
Low Temperature Operation ∆R 0.25%
High Temperature Exposure ∆R 0.50%
Load Life, 2,000 Hours (≤33 Ohms = ±0.5 Ohm) ∆R 0.50%
Resistance to Solder Heat (Total immersion in solder at 280°C for 10 sec.) ∆R 0.25%
Dielectric Withstanding Voltage 200V for 1 minute
Temperature Exposure, Maximum 215°C for 3 minutes
Marking Permanency MIL-STD-202, Method 215
Lead Solderability MIL-STD-202, Method 208
Flammability UL-94V-O Rated
Storage Temperature Range -55°C to +150°C
ENVIRONMENTAL
Standard Resistance Tolerance, at 25°C ±2%
Operating Temperature Range -55°C to +125°C
Temperature Coefficient of Resistance ±250ppm/°C
Temperature Coefficient of Resistance Tracking ±50ppm/°C
Voltage Coefficient of Resistance ±100ppm/°C
Maximum Operating Voltage 25Vdc
Insulation Resistance ≥10,000 Megohms
ELECTRICAL
Specifications subject to change without notice.
4-124 Model 627 T
.050
1.27
.016
0.41
.310
7.87
Max.
.220 ± .005
5.59 ± 0.13
Typ.
.028
0.71 Typ.
.008
0.20 Typ.
.095
2.41 Max.
Typ.
.395
10.03Max.
.008
0.20
.015
0.38 Typ.
OUTLINE DIMENSIONS (Inch/mm)
1
50Ω
2
50Ω
50Ω
50Ω
50Ω
50Ω
50Ω
50Ω
50Ω
50Ω
50Ω
50Ω
125Ω125Ω
14 13
3 4
125Ω125Ω
12 11
5 6
125Ω125Ω
10 9
7
8
SCHEMATIC
Lead Material Copper Alloy, 60/40 Tin-Lead (Dipped)
Lead Configuration Gull Wing
Lead Coplanarity ±0.002 in. (0.057mm)
Substrate Material Alumina
Resistor Material Cermet
Body Material Epoxy
MECHANICAL
Note: Maximum allowable mold excursion = 0.006"
4
4-125 Model 627 T
TYPICAL APPLICATION
VCC
TX1 IN
TX2 IN
TX3 IN
RX2 OUT
RX1 OUT
(5V) S1
(0V) S2
3
6
7
8
12
13
9
10
26
25
24
23
22
16
5
27
21
18
17
15
1µF1µF 1µF1µF
14 OE
4321 1µF
125Ω50Ω
50Ω
Linear Techology
Model LTC 1345
Linear Techology
Model LTC 1345
BI Model 627T provides
6 of these termination
networks in a single
package
DCE DTE
3
13
12
11
7
6
9
10
VCC
RX1 OUT
RX2 OUT
RX3 OUT
TX2 IN
TX1 IN
S1 (0V)
S2 (5V)
4321
15
16
18
17
20
26
5
27
19
24
23
25
1µF
V.35 Balanced Interface
Percent of
Rated Power
100
80
60
40
20
0
15012570-0
Degrees C
POWER DERATING CURVE
Model Package Per Resistor
627 T 1.28 0.25
POWER DISSIPATION, WATTS AT 70°C
4-126 Model 627 T
Standard: Tape & Reel
Conforms to requirements of EIA-481.
All units oriented with lead #1 to the left of direction of feed.
Tape: Width = 24mm
Pocket = Embossed Antistatic Plastic
Pitch = 12mm
Reel: Diameter = 13” (330mm) Maximum
Capacity = 2,000 Units
Option: Magazines
Conforms to EIA and JEDEC standards.
All units oriented with lead #1 to the same side.
Magazine: Capacity = 50 Units
PACKAGING
62 7 T 500 / 1250 TR4
Model Series
No. of Leads:
7 = 14 leads
Circuit Type:
T = V.35 Termination
Standard Tape & Reel Packaging:
(No code used for Magazines.)
Resistance Values
ORDERING INFORMATION
Part Marking
Lead #1 Indicator
Part
Number
627T50/125
Part
Marking
7T500
Date Code
Manufacturer’s Trademark
UK MADE
TYPICAL PART MARKING
