The Lauterbach LA-7742 is a JTAG debugger cable connector that bridges Lauterbach debug interfaces with embedded target systems via standard JTAG, cJTAG, and Serial Wire Debug (SWD) protocols. Designed for Arm9 core architectures, this IDC20A connector operates across 0.4 V to 5 V and integrates with Power Debug modules—including USB 2.0/USB 3.0, Ethernet, PowerTrace, Power Debug II, and PowerDebug PRO variants. The LA-7742 features an IDC female polarized socket connector (Tyco/T&B 1-1658526-3) and ARM-20 standard 20-pin double-row connectivity with 0.100 in. × 0.100 in. pin spacing. Full software support covers Windows, Linux, and macOS platforms. Note: This product is out of production.
Technical Specifications
• Debug Interface Support: Standard JTAG, cJTAG, Serial Wire Debug (SWD) Port
• Supported Architectures: Arm9 cores
• Operating Voltage Range: 0.4 V to 5 V
• Debug Cable Connector Type: IDC20A (female, polarized socket)
• Connector Specification: ARM-20 standard—20-pin double-row, 0.100 in. × 0.100 in. pin-to-pin spacing, 0.025 in. square post width
• JTAG Clock Frequency (Reference): 20 MHz
• Software Platforms: Windows, Linux, macOS
– Key Features
• VTREF (target reference voltage) auto-adjusts debugger output driver levels for adaptive logic signaling
• SRST- system reset driven open-drain with 47 kΩ pull-up integrated in debug cable
• Extended debug signals including TCK, TMS, TDI, TDO, TRST-, and DBGRQ (debug request)
• Compatible with standard 20-pin ARM JTAG connectors; shrouded connector variants recommended for robust board connectivity
• Multi-platform debug module integration via USB and Ethernet interfaces
– Typical Applications
• Embedded system debugging and programming on Arm9-based targets
• In-circuit debugging with adaptive voltage-level translation
• Real-time processor halt and debug mode entry via DBGRQ signaling
– Compatibility & Integration
Integrates with Lauterbach Power Debug ecosystem (USB 2.0, USB 3.0, Ethernet, PowerTrace, Power Debug II, PowerDebug PRO). Requires external power debug module; self-powered tool configurations do not utilize VSUPPLY line.
