DM-COP8/44P National Semiconductor, DM-COP8/44P Datasheet - Page 216

• Manufacturer Part Number: DM-COP8/44P
• Description: CABLE FOR DEBUG MODULE 44-PLCC
• Manufacturer: National Semiconductor

Specifications of DM-COP8/44P

• Accessory Type: 44-PLCC Target Cable
• For Use With/related Products: MetaLink Debug Module
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *DM-COP8/44P

Figure 4-11 shows the block diagram for an industrial timer. The user turns the
potentiometer to set the required delay time. When the delay time has elapsed, a load is
switched on or off, as selected by the input switches. The time base is derived from the
power line using a simple zero cross detection circuit, thereby allowing the use of an
inexpensive RC clock instead of a crystal oscillator. There are two indicator diodes and a
buzzer.
4-24
110V / 60Hz
240V / 50Hz
ZERO CROSS DETECTION
TIMING CONTROL
USER SWITCHES
RC OSCILLATOR
COP8SAx7 APPLICATION IDEAS
Vcc
Figure 4-11 Industrial Timer Application
Vcc
Vcc
+
Vcc
SOFTWARE
WATCHDOG
INTERRUPT
HIGH SINK
Vcc
OUTPUTS
TIMER T1
CORE
TRAP
HIGH-SIDE RELAY DRIVER
BUZZER
TWO INDICATOR LEDS
Vrelay
Vcc
Vcc