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©2001 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.0
Features
· Replaces Two KA555 Timers
· Operates in Both Astable And Monostable Modes
· High Output Current
· TTL Compatible
· Timing From Microsecond To Hours
· Adjustable Duty Cycle
· Temperature Stability Of 0.005% Per
°
C
Applications
· Precision Timing
· Pulse Shaping
· Pulse Width Modulation
· Frequency Division
· Traffic Light Control
· Sequential Timing
· Pulse Generator
· Time Delay Generator
· Touch Tone Encoder
· Tone Burst Generator
Description
The KA556 series dual monolithic timing circuits are a
highly stable controller capable of producing accurate time
delays or oscillation. The KA556 is a dual KA555. Timing is
provided an external resistor and capacitor for each timing
function. The two timers operate independently of each
other, sharing only V
CC
and ground. The circuits may be
triggered and reset on falling waveforms. The output
structures may sink or source 200mA.
14-DIP
1
14-SOP
1
Internal Block Diagram
KA556
Dual Timer
KA556
2
Absolute Maximum Ratings (T
A
= 25
°
°
°
°
C)
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
KA556
T
OPR
0 ~ + 70
°
C
Storage Temperature Range
T
STG
- 65 ~ + 150
°
C
KA556
3
Electrical Characteristics
(T
A
= 25
°
C, V
CC
= 5 ~ 15V, unless otherwise specified)
Notes:
*1. Supply current when output is high is typically 1.0mA less at V
CC
= 5V
*2. Tested at V
CC
= 5V and V
CC
= 15V
*3. This will determine the maximum value of R
A
+ R
B
for 15V operation.
The maximum total R = 20M
, and for 5V operation the maximum total R = 6.6M
.
*4. Matching characteristics refer to the difference between performance characteristics of each timer section in the monostable
mode.
*5. As reset voltage lowers, timing is inhibited and then the output goes low.
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
Supply Voltage
V
CC
-
4.5
-
16
V
Supply Current *
1
(two timers)
(low state)
I
CC
V
CC
= 5V, R
L
=
V
CC
= 15V, R
L
=
-
5
16
12
30
mA
mA
Timing Error *
2
(monostable)
Initial Accuracy
Drift with Temperature
Drift with Supply Voltage
ACCUR
t/
T
t/
V
CC
R
A
= 2K
to 100K
C = 0.1
µ
F
T = 1.1RC
-
0.75
50
0.1
-
%
ppm/
°
C
%/V
Control Voltage
V
C
V
CC
= 15V
9.0
10.0
11.0
V
V
CC
= 5V
2.6
3.33
4.0
V
Threshold Voltage
V
TH
V
CC
= 15V
8.8
10.0
11.2
V
V
CC
= 5V
2.4
3.33
4.2
V
Threshold Current*
3
I
TH
-
-
30
250
nA
Trigger Voltage
V
TR
V
CC
= 15V
4.5
5.0
5.6
V
V
CC
= 5V
1.1
1.6
2.2
V
Trigger Current
I
TR
V
TR
= 0V
-
0.01
2.0
µ
A
Reset Voltage*
5
V
RST
-
0.4
0.6
1.0
V
Reset Current
I
RST
-
-
0.03
0.6
mA
Low Output Voltage
V
OL
V
CC
= 15V
I
SINK
= 10mA
I
SINK
= 50mA
I
SINK
= 100mA
I
SINK
= 200mA
V
CC
= 5V
I
SINK
= 8mA
I
SINK
= 5mA
-
0.1
0.4
2.0
2.5
0.25
0.15
0.25
0.75
3.2
0.35
0.25
V
V
High Output Voltage
V
OH
V
CC
= 15V
I
SOURCE
= 200mA
I
SOURCE
= 100mA
12.75
12.5
13.3
-
V
V
CC
= 5V
I
SOURCE
= 100mA
2.75
3.3
-
V
Rise Time of Output
t
R
-
-
100
300
ns
Fall Time of Output
t
F
-
-
100
300
ns
Discharge Leakage Current
I
LKG
-
-
10
100
nA
Matching Characteristics*
4
Initial Accuracy
Drift with Temperature
Drfit with Supply Voltage
ACCUR
t/
T
t/
V
CC
-
-
1.0
10
0.2
2.0
0.5
%
ppm/
°
C
%/V
Timing Error (astable)*
2
Initial Accuracy
Drift with Temperature
Drift with Supply Voltage
ACCUR
t/
T
t/
Vcc
V
CC
= 15V
R
A
,R
B
= 1K
to 100K
C = 0.1
µ
F
-
2.25
150
0.3
-
%
ppm/
°
C
%/V
KA556
4
Mechanical Dimensions
Package
6.40
±
0.20
7.62
0.300
2.54
0.100
#1
#7
#8
#14
0.252
±
0.008
0~15
°
0.25
+0.10
0.05
0.010
+0.004
0.002
3.30
±
0.30
0.130
±
0.012
3.25
±
0.20
0.128
±
0.008
19.40
±
0.20
0.764
±
0.008
19.80
0.780
MAX
5.08
0.200
0.20
0.008
MAX
MIN
2.08
0.082
()
0.46
±
0.10
0.018
±
0.004
0.059
±
0.004
1.50
±
0.10
14-DIP
KA556
5
Mechanical Dimensions
(Continued)
Package
8.56
±
0.20
0.337
±
0.008
1.27
0.050
5.72
0.225
1.55
±
0.10
0.061
±
0.004
0.05
0.002
6.00
±
0.30
0.236
±
0.012
3.95
±
0.20
0.156
±
0.008
0.60
±
0.20
0.024
±
0.008
8.70
0.343
MAX
#1
#7
#8
0~8
°
#14
0.47
0.019
()
1.80
0.071
MAX0.10
MAX0.004
MAX
MIN
+
0.10
-0.05
0.20
+
0.004
-0.002
0.008
+
0.10
-0.05
0.406
+
0.004
-0.002
0.016
14-SOP
KA556
6
Ordering Information
Product Number
Package
Operating Temperature
KA556
14-DIP
0 ~ + 70
°
C
KA556D
14-SOP
KA556I
14-DIP
KA556ID
14-SOP
KA556
7
KA556
5/22/01 0.0m 001
Stock#DSxxxxxxxx
2001 Fairchild Semiconductor Corporation
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which, (a) are intended for surgical implant into the body,
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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
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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
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