Datasheet

UNISONIC TECHNOLOGIES CO., LTD
LM556
LINEAR INTEGRATED CIRCUIT
DUAL TIMER

DESCRIPTION
The UTC LM556 dual monolithic circuit is a highly stable controller
capable of producing accurate delays or oscillation. The UTC LM556 is
the dual of UTC NE555; timing is provided an external resistor and
capacitor for each function. The two timers operate independently of
each other, sharing only VCC and GND. The circuits may be triggered
and reset on falling wave forms. The output structures may sink or
source 200mA.

FEATURES
*High Current Driver Capability(=200mA)
*Adjustable Duty Cycle
*Timing From μSec to Hours
*Temperature Stability of 0.005%/C
*TTL Compatible
*Operates in Both Astable and Monostable Modes

ORDERING INFORMATION
Ordering Number
Lead Free
LM556L-D14-T
-

Halogen Free
LM556G-D14-T
LM556G-S14-R
Package
Packing
DIP-14
SOP-14
Tube
Tape Reel
MARKING
DIP-14
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Copyright © 2015 Unisonic Technologies Co., Ltd
SOP-14
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QW-R106-004.D
LM556

LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
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QW-R106-004.D
LM556

LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (TA=25°C, unless otherwise specified)
PARAMETER
Supply Voltage
Power Dissipation
Lead Temperature(soldering 10 sec.)
Operating Temperature
Storage Temperature

SYMBOL
VCC
PD
TLEAD
TOPR
TSTG
RATINGS
16
600
300
-20~85
-65~150
UNIT
V
mW
°C
°C
°C
ELECTRICAL CHARACTERISTICS ( TA=25°C ,VCC=5 to 15V, unless otherwise specified)
PARAMETER
Supply voltage
Supply Current(two timers)
(low state), (Note 1)
SYMBOL
VCC
Timing Error(monostable)
Initial Accuracy(Note 2)
Drift with Temperature
Drift with Supply Voltage
Timing Error(astable)
Initial Accuracy(Note 2)
Drift with Temperature
Drift with Supply Voltage
ICC
RA=2KΩ to 100KΩ
C=0.1μF, T=1.1RC
ACCUR
t/T
t/VCC
RA=1KΩ to 100KΩ
C=0.1μF, VCC=15V
VC
Threshold Voltage
VTH
Threshold Current(Note 3)
ITH
Trigger Voltage
VtR
Trigger Current
Reset Voltage(Note 4)
Reset Current
ItR
Vrst
Irst
VOL
MIN
4.5
VCC=5V, RL=
VCC=15V, RL=
ACCUR
t/T
t/VCC
Control Voltage
Low Output Voltage
TEST CONDITIONS
5
16
VCC=15V
VCC=5V
VCC=15V
VCC=5V
9.0
2.6
8.8
2.4
VCC=5V
VCC=15V
VtR=0
1.1
4.5
0.4
VCC=15V, ISINK=10mA
VCC=15V, ISINK=50mA
VCC=15V, ISINK=100mA
VCC=15V, ISINK=200mA
VCC=5V, ISINK=5mA
VCC=5V, ISINK=8mA
High Output Voltage
VOH
VCC=15V, ISOURCE=200mA
VCC=15V, ISOURCE=100mA
VCC=5V, ISOURCE=100mA
TYP
12.75
2.75
MAX
16
12
30
UNIT
V
mA
mA
0.75
50
0.1
%
ppm/°C
%/V
2.25
150
0.3
10.0
3.33
10.0
3.33
30
1.6
5
0.01
0.6
0.03
0.1
0.4
2
2.5
0.15
0.25
12.5
13.3
3.3
100
100
20
%
ppm/°C
%/V
V
V
V
V
nA
V
V
μA
V
mA
V
V
V
V
V
V
V
V
V
nSec
nSec
nA
11.0
4.0
11.2
4.2
250
2.2
5.6
2.0
1.0
0.6
0.25
0.75
3.2
0.25
0.35
Rise Time of Output
tR
300
Fall Time of Output
tF
300
Discharge Leakage Current
ILKG
100
Matching Parameter
Initial Accuracy(Note 5)
ACCUR
1
2
%
RA, RB=1KΩ to 100KΩ
Drift with Temperature
t/T
10
ppm/°C
C=0.1μF, VCC=15V
0.2
0.5
%/V
Drift with Supply Voltage
t/VCC
Notes: 1.Supply current when output is high is typically 1mA less at VCC 5V.
2. Tested at VCC=5V and VCC=15V.
3: This will determine the maximum value of RA+RB for 15V operation, The maximum total is R=20MΩ, and
for 5V operation the maximum total is R=6.6MΩ.
4: As reset voltage lower, timing is inhibited and then the output goes low.
5: Matching parameters refer to the difference between performance parameters of each timer section in the
monostable mode.
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www.unisonic.com.tw
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LM556
LINEAR INTEGRATED CIRCUIT
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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www.unisonic.com.tw
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