COP8SA-DM National Semiconductor, COP8SA-DM Datasheet - Page 173

• Manufacturer Part Number: COP8SA-DM
• Description: MODULE DEBUGGING FOR COP8SA
• Manufacturer: National Semiconductor

Specifications of COP8SA-DM

• Module/board Type: Debugger Module
• For Use With/related Products: Cop 8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *COP8SA-DM

direct the current resulting from an ESD pulse on an input pin, onto the V
bus. Figure 2-33 shows the on-chip detection/protection circuit. The circuitry is designed
to meet ESD protection goal of at least 2000 volts as measured using Human Body Model.
There are two Merrill Clamp blocks on each die. The Merrill Clamp block is used to help
protect the chip from ESD events. The Merrill Clamp senses a fast rise-time on the V
supply and shorts the V
used to drain off any charge on V
contains only a 4 M
GND return line.
INPUT
GND
V
Figure 2-33 On-Chip ESD Detection/Protection Circuit
CC
resistor which is connected between the V
CC
PROTECTION
PROTECTION
line to the GND with a transistor. A Merrill Resistor block is
DIODE
DIODE
CC
between ESD events. The Merrill Resistor block
4M
COP8SAx7 MICROCONTROLLER
DETECTOR
CC
supply line and the
CC
and GND
2-135
CC