Tektronix / Keithley 7174A 8×12, Low-Current, High-Speed Matrix Card

The Tektronix/Keithley 7174A is an 8×12 low-current, high-speed matrix card for automated test and measurement applications in semiconductor research, development, and production. This 2-pole Form A crosspoint matrix enables precise low-current signal routing with exceptional isolation and settling performance, supporting both single-card configurations and multi-card expansion up to 8×72 or 12×60 matrices within compatible switching mainframes.

– Technical Specifications

Matrix Configuration
• Crosspoint Type: 2-pole Form A (Signal Guard)
• Size: Single 8 rows × 12 columns
• Maximum Signal Level: 200V, 2A carry current
• Relay Settling Time: <1 ms
• Relay Drive Current: 17 mA per crosspoint
• Contact Life: 10⁸ closures (cold switching)

Electrical Performance
• Offset Current: 2 × 10¹⁴ Ω, 1 pF
• Common Isolation (Signal to Chassis): >10¹⁴ Ω, <10 pF
• Insulation Resistance: 6.7 × 10¹³ Ω minimum
• Maximum Leakage: 0.01 pA/V (pin to ground), 0.005 pA/V (pin to pin)
• Settling Time: <2.5 s to 400 fA after 10V applied (typical)
• Capacitance (Guard Driven): <10 pF (path to ground), 1 pF typical (path to path)

RF and Frequency Performance
• 3dB Bandwidth: 30 MHz typical (50Ω load, 50Ω source); 40 MHz typical (1MΩ load, 50Ω source)
• Crosstalk (1 MHz, 50Ω Load): <–70 dB
• Insertion Loss (1 MHz, 50Ω Load): <–0.2 dB typical

Physical and Environmental
• Connector: 3-lug triax (Signal, Guard, Chassis)
• Operating Temperature: 0° to 50°C, up to 35°C at 70% R.H.
• Storage Temperature: –25° to +65°C
• Compliance: EMC (EU Directive 89/336/EEC), Safety (EN61010-1/IEC 1010)

– Key Features

• Expandable architecture: up to six 7174A cards form extended matrices in single 707A mainframe
• Eight MCX expansion cables included for simplified interconnection
• Guard-driven architecture minimizes crosstalk and leakage
• Sub-millisecond relay switching enables high-throughput automated testing

– Typical Applications

• Semiconductor device characterization and parametric testing
• Low-current measurement routing (picoampere-level sensitivity)
• Multi-point device switching in wafer probing and burn-in systems
• High-speed signal matrix distribution in research and production environments

– Compatibility & Integration

The 7174A integrates with Keithley 707A, 707B, 708A, and 708B switching matrix mainframes. Direct compatibility extends to Keithley 4200-SCS, 2635A/2636A SourceMeter® instruments, and Agilent B1500 analyzer platforms.