The Keithley 7018-S is a dual 1×14 multiplexer module that routes multiple test points and sensors to a single measurement instrument through two independent 3-pole multiplexer banks. Each bank switches 14 channels sequentially, supporting DC signals to 110V at 1A and AC signals to 125V rms (175V peak) at 1A. The module integrates into Keithley 7001 and 7002 switch systems and can be configured via onboard jumpers as a combined 1×14, 6-pole multiplexer or operated in parallel for enhanced pole density.
## Technical Specifications
**Multiplexer Configuration**
• Two independent 1×14, 3-pole multiplexer banks
• Combinable to single 1×14, 6-pole configuration
• Parallel 6-pole operation supported in 7001/7002 platforms
• Onboard jumpers enable individual bank isolation from backplane
**Contact Performance**
• 3-pole Form A per channel
• Contact life: 10⁸ closures (cold switching); 10⁵ closures at maximum signal levels; 5 × 10⁴ closures at 20V, 0.5A
• Initial contact resistance < 0.5Ω; end-of-life resistance 1Ω
• Contact potential < 25µV
• Offset current < 100pA
• Actuation time 3ms
**Electrical Performance**
• Maximum DC: 110V between any two pins, 1A switched
• Maximum AC: 125V rms or 175V peak between any two pins, 1A switched
• Maximum switched power: 30VA DC, 60VA AC (resistive loads)
• Common mode voltage: 175V peak to chassis
• Channel resistance per conductor 10⁹Ω; center-to-shield > 10⁹Ω, 10⁹Ω
**AC Performance (50Ω termination)**
• Insertion loss: < 0.35dB @ 800MHz, < 1.0dB @ 1GHz, < 2.0dB @ 2GHz, < 3.0dB @ 3GHz
• Channel-channel crosstalk: < -60dB @ 800MHz, < -40dB @ 1GHz, < -35dB @ 2GHz, < -30dB @ 3GHz
• Mux-to-mux crosstalk: < -80dB @ 800MHz, < -60dB @ 1GHz, < -60dB @ 2GHz, < -55dB @ 3GHz
• VSWR < 1.2 @ 100MHz
**Connector & Environmental**
• Screw terminal connectors; maximum #16 AWG, typical #22 AWG
• Operating temperature 0°C to 50°C; storage –25°C to 65°C
• Humidity up to 35°C at < 80% R.H.
## Key Features
• Dual independent 1×14 banks for flexible signal routing
• Low contact potential (< 25µV) and minimal offset current ( 10⁹Ω) between channels and mux banks
• Controlled actuation time of 3ms
## Typical Applications
• Automated test equipment (ATE) requiring multi-point switching
• Data acquisition systems with sensor multiplexing
• Process monitoring with dynamic channel selection
• RF/microwave signal routing up to 3GHz
## Compatibility & Integration
The 7018-S integrates directly into Keithley 7001 and 7002 switch systems, enabling modular expansion of switching capacity while maintaining isolation between signal paths.
