TS556
LOW POWER DUAL CMOS TIMER
s
VERY LOW POWER CONSUMPTION :
s
s
s
s
s
s
s
220 µA typ at V
CC
= 5V
180 µA typ at V
CC
= 3V
HIGH MAXIMUM ASTABLE FREQUENCY
2.7MHz
PIN-TO-PIN AND FUNCTIONALLY
COMPATIBLE WITH BIPOLAR NE556
WIDE VOLTAGE RANGE : +2V to +16V
HIGH OUTPUT CURRENT CAPABILITY
SUPPLY CURRENT SPIKES REDUCED
DURING OUTPUT TRANSITIONS
HIGH INPUT IMPEDANCE : 10
12
Ω
OUTPUT COMPATIBLE WITH TTL,CMOS
AND LOGIC MOS
N
DIP14
(Plastic Package)
DESCRIPTION
The TS556 is a dual CMOS timer which offers
very low consumption (I
cc(TYP)
TS556 = 220µA at
V
CC
=+5V versus I
cc(TYP)
NE556 = 6mA) and high
frequency f
f(max.)
TS556 = 2.7MHz versus f
(max.
)
NE556 = 0.1 MHz)
Thus, either in Monostable or Astable mode, tim-
ing remains very accurate.
The TS556 provides reduced supply current
spikes during output transitions, which enables
the use of lower decoupling capacitors compared
to those required by bipolar NE556.
Timing capacitors can also be minimized due to
high input impedance (10
12
Ω).
ORDER CODES
Package
Part Number
TS556C
TS556I
TS556M
Temperature Range
N
0°C, +70°C
-40°C, +125°C
-55°C, +125°C
•
•
•
D
•
•
•
D
SO14
(Plastic Micropackage)
PIN CONNECTIONS
(top view)
Discharge
Threshold
Control
Voltage
Reset
Output
Trigger
GND
1
2
3
4
5
6
7
14
13
12
11
10
9
8
+V
S
Discharge
Threshold
Control
Voltage
Reset
Output
Trigger
N =
Dual in Line Package (DIP)
D =
Small Outline Package (SO) - also available in Tape & Reel (DT)
February 2003
1/11
TS556
BLOCK DIAGRAM
V
CC
14
Reset
4 / 10
TS556
R
2 / 12
R1
+
Threshold
Control
Voltage
Q
R
5/9
Output
-
3 / 11
A
S
R
+
Trigger
6/8
-
B
1 / 13
R
7
Discharge
Ground
FUNCTION TABLE
RESET
Low
High
High
High
TRIGGER
x
Low
High
High
THRESHOLD
x
x
High
Low
OUTPUT
Low
High
Low
Previous State
LOW
<-----> Level Voltage
≤
Min voltage specificed
HIGH
<-----> Level Voltage
≥
Max voltage specificed
x
<-----> Irrelevant
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CC
T
j
T
stg
P
D
Supply Voltage
Junction Temperature
Storage Temperature Range
Power dissipation
1)
DIP14
SO14
Parameter
Value
+18
+150
-65 to +150
1560
830
Unit
V
°C
°C
mW
1. T
j
= 150°C, T
amb
= 25
o
C with Rthja = 80
o
C/W for DIP14 package
Rthja = 150
o
C/W for SO14 package
OPERATING CONDITIONS
Symbol
V
CC
T
oper
Supply Voltage
Operating Free Air Temperature Range
TS556C
TS556I
TS556M
Parameter
Value
+2 to +16
0 to +70
-40 to +125
-55 to +125
Unit
V
°C
2/11
V
CC
R1
Τ10
Τ12
Τ21
Τ20
Τ26
Τ27
Τ31
Τ30
Τ13
Τ11
50k
Ω
Τ1
Τ2
R2
SCHEMATIC DIAGRAM
(1/2 TS556)
50k
Ω
R7
Τ25
Τ34
Control Voltage
Τ8 Τ9
Threshold
R3
Τ4
Output
Trigger
Τ14
Τ18
Τ23
Τ19
Τ7
Τ24
Τ28
Τ29
Τ32
Discharge
Τ35
50k
Ω
R4
50k
Ω
R5
Τ5
Τ6
50k
Ω
R6
Τ15
Τ16
Τ17
Τ22
Τ33
50k
Ω
GND
RESET
TS556
3/11
TS556
STATIC ELECTRICAL CHARACTERISTICS
V
CC
= +2V, T
amb
= +25°C, Reset to V
CC
(unless otherwise specified)
Symbol
I
CC
V
CL
V
DIS
I
DIS
V
OL
V
OH
V
TRIG
I
TRIG
I
TH
V
RESET
I
RESET
Parameter
Supply Current (no load, High and Low States)
T
min.
≤
T
amb
≤
T
max.
Control Voltage Level
T
min.
≤
T
amb
≤
T
max.
Discharge Saturation Voltage (I
dis
= 1mA)
T
min.
≤
T
amb
≤
T
max.
Discharge Pin Leakage Current
Low Level Output Voltage (I
sink
= 1mA)
T
min.
≤
T
amb
≤
T
max.
High Level Output Voltage (I
source
= -0.3mA)
T
min.
≤
T
amb
≤
T
max.
Trigger Voltage
T
min.
≤
T
amb
≤
T
max.
Trigger Current
Threshold Current
Reset Voltage
T
min.
≤
T
amb
≤
T
max.
Reset Current
0.4
0.3
1.5
1.5
0.4
0.3
1.2
1.1
Min.
Typ.
130
1.3
0.05
1
0.1
1.9
0.67
10
10
1.1
10
1.5
2.0
0.95
1.05
Max.
400
400
1.4
1.5
0.2
0.25
100
0.3
0.35
Unit
µA
V
V
nA
V
V
V
pA
pA
V
pA
4/11
TS556
ELECTRICAL CHARACTERISTICS
V
CC
= +3V, T
amb
= +25°C, Reset to V
CC
(unless otherwise specified)
Symbol
I
CC
V
CL
V
DIS
I
DIS
V
OL
V
OH
V
TRIG
I
TRIG
I
TH
V
RESET
I
RESET
Parameter
Supply Current (no load, High and Low States)
T
min.
≤
T
amb
≤
T
max.
Control Voltage Level
T
min.
≤
T
amb
≤
T
max.
Discharge Saturation Voltage (I
dis
= 1mA)
T
min.
≤
T
amb
≤
T
max.
Discharge Pin Leakage Current
Low Level Output Voltage (I
sink
= 1mA)
T
min.
≤
T
amb
≤
T
max.
High Level Output Voltage (I
source
= -0.3mA)
T
min.
≤
T
amb
≤
T
max.
Trigger Voltage
T
min.
≤
T
amb
≤
T
max.
Trigger Current
Threshold Current
Reset Voltage
T
min.
≤
T
amb
≤
T
max.
Reset Current
0.4
0.3
2.5
2.5
0.9
0.8
1.8
1.7
Min.
Typ.
180
2
0.05
1
0.1
2.9
1
10
10
1.1
10
1.5
2.0
1.1
1.2
Max.
460
460
2.2
2.3
0.2
0.25
100
0.3
0.35
Unit
µA
V
V
nA
V
V
V
pA
pA
V
pA
DYNAMIC ELECTRICAL CHARACTERISTICS
V
CC
= +3V, T
amb
= +25°C, Reset to V
CC
(unless otherwise specified)
Symbol
Parameter
Timing Accuracy (Monostable)
1)
R = 10kΩ, C = 0.1µF
Min.
Typ.
1
1
0.5
75
2
5
0.5
25
20
100
350
-
%/V
ppm/°C
MHz
%
%/V
ns
ns
ns
ns
Max.
Unit
V
CC
=+2V
V
CC
=+3V
%
Timing Shift with Supply Voltage Variations (Monostable)
1)
R = 10kΩ, C = 0.1µF,V
CC
= +3V ±0.3V
Timing Shift with Temperature
1)
T
min.
≤
T
amb
≤
T
max
f
max
Maximum Astable Frequency
2)
R
A
= 470Ω, R
B
= 200Ω, C = 200pF
Astable Frequency Accuracy
2)
R
A
=R
B
= 1kΩ to 100kΩ, C = 0.1µF
Timing Shift with Supply Voltage Variations (Astable mode)
2)
R
A
=R
B
= 10kΩ, C = 0.1µF, V
CC
= +3 to +5V
t
R
t
F
t
PD
t
RPW
1.
2.
Output Rise Time (C
load
= 10pF)
Output Fall Time (C
load
= 10pF)
Trigger Propagation Delay
Minimum Reset Pulse Width (V
trig
= +3V)
see figure 2
see figure 4
5/11
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