KA556I

©2004 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.1
Features
Replaces two KA555 Timers
Operates in Both Astable and Monos Table 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
Comparator
Flip Flop
Comparator
Comparator
Comparator
Flip Flop
Output
Output
314
6
12
11
5
10
9
13
7
4
5
1
2
Control Voltage
V
CC
Trigger
Threshold
Control Voltage
Trigger
Reset
Output
Discharge
GND
Reset
Output
R
R
R
R
R
R
THRESHOLD
Discharge
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/KA556I
T
OPR
0 ~ +70 / -40 ~ +85 °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
-4.5-16V
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
(Monos Table)
Initial Accuracy
Drift with Temperature
Drift with Supply Voltage
ACCUR
t/T
t/V
CC
R
A
= 2k to 100k
C = 0.1µF
T = 1.1RC
-
0.75
50
0.1
-
%
ppm/°C
%/V
Control Voltage V
CC
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 µA
Reset Voltage*
5
V
RST
-0.40.61.0V
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 = 0.1µF
-
2.25
150
0.3
-
%
ppm/°C
%/V

KA556I

Mfr. #:
Manufacturer:
ON Semiconductor / Fairchild
Description:
Timers & Support Products Dual
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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