Nichrome Resistor Networks on Ceramic Substrates Model 688 Series Precision Thin Film .300” Dual In-Line Surface Mount Resistor Networks • RoHS Compliant • 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 Electrical Operating Temperature Range Resistance Voltco Interlead Capacitance Operating Voltage, Maximum Insulation Resistance Noise, Maximum (MIL-STD-202, Method 308) -55°C to +125°C ≈0 <2pF 100Vdc or √PR ≥10,000 Megohms -40dB Environmental (Mil-R-83401) 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 Dielectric Withstanding Voltage Temperature Exposure, Maximum R 0.10% 100V for 1 minute 215°C for 3 minutes Marking Permanency MIL-STD-202, Method 215 Lead Solderability MIL-STD-202, Method 208 Flammability Storage Temperature Range UL-94V-O Rated -65°C to +125°C Specifications subject to change without notice. General Note TT electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT electronics’ own data and is considered accurate at time of going to print. www.bitechnologies.com www.irctt.com www.welwyn-tt.com © TT electronics plc 1. 12 Nichrome Resistor Networks on Ceramic Substrates Model 688 Series Mechanical Lead Material 100% matte Tin (RoHS) 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 Standard Resistance Values, Ohms Model Ohms Code 688A 50K 100K 5002 1003 688B 100K 1003 Power Derating Curve Percent of Rated Power Power Dissipation, Watts At 70°C Model Package Per Resistor 688 .7 .1 100 80 60 40 20 0 -0 70 125 150 Degrees C Solder Pad Layout (Inch/mm) .080 2.03 .025 0.64 .300 7.62 .460 11.7 .050 Typ. 1.27 General Note TT electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT electronics’ own data and is considered accurate at time of going to print. www.bitechnologies.com www.irctt.com www.welwyn-tt.com © TT electronics plc 1. 12 Nichrome Resistor Networks on Ceramic Substrates Model 688 Series Outline Dimensions (Inch/mm) .0165 ± .0025 Typ. 0.419 ± 0.064 +.003 .010 –.001 Typ. 0.25 +0.08 –0.02 .050 Typ. 1.27 16 9 .032 ± .008 0.81 ± 0.20 .300 Max. 7.62 .405 ± .005 10.3 ± 0.13 1 .413 Max. 10.5 0˚ To 8˚ 8 .104 Max. 2.64 .0085 ± .0035 0.216 ± 0.089 Seating Plane Note: Leads are within .005/0.13 of true position. Maximum allowable mold excursion = 0.006” Schematics 688A - Isolated Resistors 688B - Bussed Resistors 16 16 1 1 Applicable Documents MIL-R-83401 — Resistor Networks, Fixed, Film, General Specifications MIL-STD-202 — Test Methods for Electronics and Electrical Component Parts General Note TT electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT electronics’ own data and is considered accurate at time of going to print. www.bitechnologies.com www.irctt.com www.welwyn-tt.com © TT electronics plc 1. 12 Nichrome Resistor Networks on Ceramic Substrates Model 688 Series Typical Marking FRONT Circuit Type 688-A 5002 Resistance Code 1234 YY MM Lot Number Date Code Packaging Standard: Magazines All units oriented with lead #1 to the same side. Magazine: Capacity = 50 units Option Embossed Tape & Reel Option: Magazines Conforms to EIA and JEDEC standards. All units oriented with lead #1 to the same side. Diameter = 7” Reel Capacity = 500 Units Reel: 13” Reel 1,500 Units Ordering Information 68 8 A Model Number of Leads: 8 = 16 Leads Circuit Type: A = Isolated B = Bussed 5002 B LF 7 Packaging Option: 7 = 7” Reel Diameter 13 = 13” Reel Diameter (No code used for Magazines.) Lead Finish: LF=Lead Free (RoHS) Accuracy Code Resistance Code: First 3 digits are significant. Last digit denotes the number of trailing zeros. General Note TT electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT electronics’ own data and is considered accurate at time of going to print. www.bitechnologies.com www.irctt.com www.welwyn-tt.com © TT electronics plc 1. 12