4
4-147 Model 688
ELECTRICAL
Operating Temperature Range -55°C to +125°C
Resistance Voltco ≈0
Interlead Capacitance <2pF
Operating Voltage, Maximum 100Vdc or √PR
Insulation Resistance ≥10,000 Megohms
Noise, Maximum (MIL-STD-202, Method 308) -40dB
ENVIRONMENTAL
Thermal Shock plus Power Conditioning ∆R 0.25%
Short Time Overload ∆R 0.10%
Terminal Strength ∆R 0.10%
Moisture Resistance ∆R 0.20%
Mechanical Shock ∆R 0.25%
Vibration ∆R 0.25%
Low Temperature Storage ∆R 0.10%
High Temperature Exposure ∆R 0.10%
Load Life, 1,000 Hours ∆R 0.10%
Resistance to Solder Heat ∆R 0.10%
Dielectric Withstanding Voltage 100V 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 -65°C to +125°C
MODEL 688
Precision Thin Film
.300” Dual In-Line
Surface Mount
Resistor Networks
Specifications subject to change without notice.
FEATURES
•Unique passivation coating eliminates moisture concerns and allows for use in applications traditionally
restricted to tantalum nitride
• Outperforms other thin film resistor materials providing excellent tolerances, ratio matching,
temperature coefficient, and temperature tracking
• Improved performance over silicon substrates in stray capacitance, frequency response and stability
STANDARD RESISTANCE VALUES, OHMS
Model Ohms Code
688A 50K 5002
100K 1003
688B 100K 1003
Percent of
Rated Power
100
80
60
40
20
0
15012570-0
Degrees C
POWER DERATING CURVE
POWER DISSIPATION, (WATTS) AT 70°C
Model Package Resistor
688 .7 .1
4-148 Model 688
MECHANICAL
Lead Plating 85/15 Tin Lead
Lead Material Copper Alloy
Lead Configuration Gull Wing
Lead Coplanarity 0.004” (0.102mm)
Substrate Material Alumina
Resistor Material Nichrome
Body Material Molded Epoxy
TOLERANCES
Accuracy Code B D F
Absolute Resistance Tolerances, at 25°C 0.1% 0.5% 1.0%
Ratio 0.1% 0.1% 0.5%
Temperature Coefficient of Resistance ±25ppm/°C
Temperature Coefficient of Resistance, Tracking ±5ppm/°C
.025
0.64
.080
2.03 .300
7.62
.050
1.27 Typ.
.460
11.7
SOLDER PAD LAYOUT (Inch/mm)
4
4-149 Model 688
1
16
688B - Bussed Resistors
1
16
688A - Isolated Resistors
SCHEMATICS
.413
10.5Max.
.104
2.64 Max.
Seating
Plane
.300
7.62
.0165 ± .0025
0.419 ± 0.064 Typ.
.050
1.27 Typ.
Max.
16
18
9
.010
0.25
+.003
–.001
+0.08
–0.02
Typ.
.032 ± .008
0.81 ± 0.20
.405 ± .005
10.3 ± 0.13
.0085 ± .0035
0.216 ± 0.089
0° To 8°
OUTLINE DIMENSIONS (Inch/mm)
Note: Leads are within .005/0.13 of true position.
Maximum allowable mold excursion = 0.006"
Note: Custom circuits are available. Consult factory.
APPLICABLE DOCUMENTS
MIL-R-83401 — Resistor Networks, Fixed, Film, General Specifications
MIL-STD-202 — Test Methods for Electronics and Electrical Component Parts
4-150 Model 688
PACKAGING
4645
Back
Logo 688-A
Date Code
Model Series
Accuracy Code
Lead #1
Indicator
Number
Of Leads
Resistance Code
Circuit Type
Front
-5002B
Lot Number
TYPICAL PART MARKING
ORDERING INFORMATION
68 8 A 5002 B 7
Model Series Packaging Option:
7 = 7" Reel Diameter
13 = 13" Reel Diameter
(No code used for Magazines.)
Accuracy Code
Resistance Code:
First 3 digits are significant.
Last digit denotes the number of trailing zeros.
Number of Leads:
8 = 16 Leads
Circuit Type:
A = Isolated
B = Bussed
Standard:
Magazines
All units oriented with lead #1 to the same side.
Magazine: Capacity = 50 Units
Option:
Embossed Tape & Reel
Reel: Diameter = 7” Reel 13” Reel
Capacity = 500 Units 1,500 Units
