UTC NE558
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R106-003,A
QUAD TIMER
DESCRIPTION
The UTC NE558 is a monolithic quad timer which
can be used to produce four entirely independent
timing functions. The highly stable, general purpose
controller can be used in a monostable mode to
produce accurate time delays.
FEATURES
*Wide supply voltage: Vcc= 4.5V~15V
*100mA output current per-section
*Edge trigger without coupling capacitor
*Time period equals RC
*Output independent
DIP-16
SOP-16
APPLICATIONS
*Precision timing
*Quad one-shot
*Timing delay generation
*Sequential timing.
BLOCK DIAGRAM
UTC NE558
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R106-003,A
ABSOLUTE MAXIMUM RATINGS
(Ta=25
C )
PARAMETER
SYMBOL
VALUE
UNIT
Supply Voltage
Vcc
16
V
Power Dissipation
Pd
600
mW
Lead Temperature(soldering 10
sec.)
Tlead
300
C
Operating Temperature
Topr
-40~85
C
Storage Temperature
Tstg
-65~150
C
ELECTRICAL CHARACTERISTICS
( Ta=25
C ,Vcc=5 to 15V, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Supply Voltage
Vcc
4.5
16
V
Supply Current
Icc
Vcc=15V,RL=15V
16
36
mA
Timing Error(T=RC)
Initial Accuracy
A
CCUR
R
A
=2K
to 100K
C=1
F
2
5
%
Drift with Temperature
t/
T
30
150
ppm/
C
Drift with Supply Voltage
t/
Vcc
0.1
0.9
%/V
Threshold Voltage( Note 1)
V
TH
0.63*Vcc
V
Threshold Current
I
TH
15
Na
Trigger voltage
Vtr
Vcc=15V
0.8
1.5
2.4
V
Trigger Current
Itr
Vtr=0
5
100
A
Reset Voltage(Note 2)
Vrst
Reset
0.8
1.5
2.4
V
Reset Current
Irst
Reset
5
100
A
Output Voltage( Note 3)
V
OL
IL=10mA
IL=100mA
0. 1
1
0. 4
2
V
Rise Time of Output
tR
IL=100mA
100
nSec
Fall Time of Output
t
F
IL=100mA
100
300
nSec
Discharge Leakage Current
I
LKG
10
500
nA
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.
Note 2: For reset below 0.8V, output s set low and trigger inhibited.
Note 3: Output structure is open collector which requires a pull up resistor to Vcc to sink current. The output is
normally low sinking current.
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