Termination networks deliver ESD protection to memory busses

Designed to terminate high-speed memory busses, TT electronics IRC Advanced Film Division has introduced a new series of termination and ESD protection networks. The new QDN series schottky diode termination networks are available in three circuit configurations specifically designed to provide termination for both controlled and uncontrolled line terminations.

A key characteristic of the new QDN termination networks is that they do not require impedance matching, said the company. The devices can terminate load impedances and clamp high and low-state reflections and noise. This makes them suitable for high-speed data lines particularly for PCI busses and SDRAM busses. In addition, all of the networks reduce overshoot and undershoot for all data line types, and provide line termination with virtually no power dissipation, according to the company.

The QDN001 series are low power/low-noise integrated schottky diode termination networks that integrate 36 schottky diodes in a single package. Designed for fast turn-on and recovery characteristics, it can support up to 18 termination lines. Channel clamping current is ±50mA. The operating voltage range for the network is -0.3V to 7V, with diode forward voltage from 0.5V (10mA) to 0.8V (50mA). Package power is rated at 1W. The operating temperature range is 0 to 70°C.

The QDN002 series is a 17-channel ESD protection network designed to provide 15kV HBM and 8kV ESD contact protection, while the QDN003 series provides 18 channels along with 15kV of HBM protection and 8kV ESD control discharge protection. Custom specifications are available.

The QDN series networks are custom devices, with minimum order quantities of 10,000. Starting price for the devices is $1.80 each. Lead times are from stock to 10 weeks.

- Gina Roos
eeProductCenter