DS26900 Datasheet | Maxim Integrated

Description The DS26900 is a JTAG signal multiplexer providing connectivity between one of three master ports and up to 18 (36 in cascade configuration) secondary ports. The device is fully configurable from any one of the three master ports. The DS26900 can automatically detect the presence JTAG devices on the secondary ports. The DS26900 can be used in multiple configurations including as a single device, two cascaded devices, or two redundant devices. All device control and configuration is acplished through standard JTAG operations via the selected master port. - - Features Efficient Solution for Star Architecture JTAG Provides Transparent munications Between the Arbitrated Master and a Selected Secondary Port Single-Package Solution Provides 18 Secondary Ports Two-Package Cascade Configuration Provides 36 Secondary Ports Three Arbitrated Master Ports Autodetection of Port Presence Internal Pullup/Down Resistors Two 32-Bit Scratchpad Registers Four GPIO Pins for Read/Write Control and Signaling Applications Operation Up to 50MHz Signal Path Modification Options Redundancy with High-Impedance Pin Independent Periphery JTAG Configuration Mode Uses IEEE 1149.1 TAP Controller Supports Live Insertion/Withdrawal 3.3V Operation Industrial Temperature Operation Ro HS-pliant Packaging - - - - - - - Applications Micro TCA Chassis ATCA Chassis AMC Carrier Cards JSM Modules System Level JTAG - - - - - - - - - Micro TCA JSM Functional Diagram AMC1 AMC2 DS26900 JTAG SWITCH MCH1 MASTER3 MCH2 MASTER2 AMC3 AMC4 AMCn AMC18 PART DS26900N+ Ordering Information TEMP RANGE -40°C to +85°C PIN-PACKAGE 144 LQFP CRAFT MASTER1 +Denotes a lead-free package. Maxim Integrated Products 1 Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device may be simultaneously available through various sales channels. For information about device errata, go to:...