User`s guide

54 | P a g e
CA555, CA555C (METAL CAN)
TOP VIEW
Functional Block Diagram
GND
TRIGGER
OUTPUT
RESET
1
2
3
4
8
7
6
5
V+
DISCHARGE
THRESHOLD
CONTROL
VOLTAGE
V+
TRIGGER THRESHOLD
RESET
GND
OUTPUT
DISCHARGE
CONTROL
2
4
6
1
3
7
5
8
TAB
VOLTAGE
THRESHOLD
COMPAR
6
THRESHOLD
8
V+
5
TRIGGER
COMPAR
2
CONTROL
VOLTAGE
TRIGGER
FLIP-FLOP
OUTPUT
3
OUTPUT
7
DISCHARGE
4
RESET
1
GND
May 1997
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright © Harris Corporation 1997
CA555, CA555C,
LM555, LM555C, NE555
Timers for Timing Delays and Oscillator Application
in Commercial, Industrial and Military Equipment
File Number 834.4
8-4
Absolute Maximum Ratings Thermal Information