688 TTELEC | Alldatasheet

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Technical content

Nichrome Resistor Networks on Ceramic Substrates Model 688 Series 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. © TT electronics plc 10.13 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 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 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 Electrical Environmental (Mil-R-83401) Specifications subject to change without notice. Not Recommended for New Designs

Model Package Per Resistor 688 .7 .1 Nichrome Resistor Networks on Ceramic Substrates Model 688 Series 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. © TT electronics plc 10.13 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 Tolerances 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 Mechanical Solder Pad Layout (Inch/mm) Percent of Rated Power 100 15012570-0 Degrees C .025 0.64 .080 2.03 .300 7.62 .050 1.27 Typ. .460 11.7 Power Dissipation, Watts At 70°C Standard Resistance Values, Ohms Power Derating Curve

Nichrome Resistor Networks on Ceramic Substrates Model 688 Series 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. © TT electronics plc 10.13 Outline Dimensions (Inch/mm) Applicable Documents Note: Leads are within .005/0.13 of true position. Maximum allowable mold excursion = 0.006” Schematics MIL-R-83401 — Resistor Networks, Fixed, Film, General Specifications MIL-STD-202 — Test Methods for Electronics and Electrical Component Parts .413 10.5 Max. .104 2.64 Max. Seating Plane .300 7.62 .0165 ± .0025 0.419 ± 0.064 Typ. .050 1.27 Typ. Max. .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˚ 688B - Bussed Resistors 688A - Isolated Resistors

Nichrome Resistor Networks on Ceramic Substrates Model 688 Series 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. © TT electronics plc 10.13 Packaging

Ordering Information

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. Reel: Diameter = Capacity = 7” Reel

500 Units

13” Reel 1,500 Units 68 8 A 5002 B LF 7 Model Number of Leads: 8 = 16 Leads Circuit Type: A = Isolated B = Bussed 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. Typical Marking Lot Number 688- A 1234 5002 YY MM Date Code Resistance Code Circuit TypeFRONT