2001 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.1
Features
Wide Supply Voltage Range: 4.5V To 16V
100 mA Output Current Per Section
Edge Triggered Without Coupling Capacitor
Time Period Equals RC
Output independent Of Trigger Conditions
Applications
Quad One-Shot
Sequential Timing
Precision Timing
Time Delay Generation
Description
The KA558/KA558B series are monolithic Quad Timers
which can be used to produce four entirely independent tim-
ing functions. These highly stable, general purpose con-
trollers can be used in a monostable mode to produce
accurate time delays, from microseconds to hours. The time
is precisely controlled by one external resistor and one
capacitor in the time delay mode. A stable mode can be oper-
ated using two of four time sections.
16-DIP
16-SOP
1
1
Internal Block Diagram
KA558/KA558B
Quad Timer
KA558/KA558B
2
Absolute Maximum Ratings (T
A
= 25
C)
Electrical Characteristics
(V
CC
= 5 ~ 15V, T
A
= 25
C, unless otherwise specified)
Note :
1. The trigger functions only on the falling edge of the trigger pulse only after previously being high. After reset the trigger must
be brought high and then low to implement triggering.
2. For reset below 0.8V, outputs set low and trigger inhibited.
3. Output structure is open collector which requires a pull up resistor to V
CC
to sink current.
The output is normally low sinking current.
Parameter
Symbol
Value
Unit
Supply Voltage
V
CC
16
V
Lead Temperature (soldering 10sec)
T
LEAD
300
C
Power Dissipation
P
D
600
mW
Operating Temperature Range KA558/KA558B
T
OPR
0 ~ + 70
C
Storage Temperature Range
T
STG
-65 ~ + 150
C
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
Supply Voltage
V
CC
-
4.5
-
16
V
Supply Current
I
CC
V
CC
=15V, reset voltage =15V
-
16
36
mA
Timing Error (T = RC)
Initial Accuracy
Drift with Temperature
Drift with Supply Voltage
ACCUR
t/
T
t/
V
CC
R = 2K
to 100K
, C =1
F
-
2
30
0.1
5
150
0.9
%
PPM/
C
%/V
*
1
Trigger Voltage
V
TR
V
CC
= 15V
-
1.5
2.4
V
*
1
Trigger Current
I
TR
V
TR
= 0V
-
5.0
100
A
*
2
Reset Voltage
V
RST
-
0.8
1.5
2.4
V
*
2
Reset Current
I
RST
-
-
50
500
A
Threshold Voltage
V
TH
-
0.8
0.63
V
CC
-
V
Threshold Current
I
TH
-
-
15
-
nA
*3
Output Voltage
V
O
I
L
= 10mA
-
0.1
0.4
V
I
L
= 100mA
-
1.0
2.0
Output Leakage Current
I
LKG
-
-
10
500
nA
Propagation Delay Time
t
D
-
-
1.0
-
S
Rise Time
t
R
I
L
= 100mA
-
100
-
nS
Fall Time
t
F
I
L
= 100mA
-
100
-
nS
KA558/KA558B
5/22/01 0.0m 001
Stock#DSxxxxxxxx
2001 Fairchild Semiconductor Corporation
LIFE SUPPORT POLICY
FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
www.fairchildsemi.com
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY
PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER
DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
PDF 
ZIP
