STMICROELECTRONICS TS556M

TS556
LOW POWER DUAL CMOS TIMER
■ VERY LOW POWER CONSUMPTION :
■
■
■
■
■
■
■
220 µA typ at VCC = 5V
180 µA typ at VCC = 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 : 1012Ω
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 (Icc(TYP) TS556 = 220µA at
VCC=+5V versus Icc(TYP) NE556 = 6mA) and high
frequency ff(max.) TS556 = 2.7MHz versus f(max.)
NE556 = 0.1 MHz)
Thus, either in Monostable or Astable mode, timing 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 (1012Ω).
ORDER CODES
Package
Part Number
TS556C
TS556I
TS556M
Temperature Range
0°C, +70°C
-40°C, +125°C
-55°C, +125°C
N
D
•
•
•
•
•
•
D
SO14
(Plastic Micropackage)
PIN CONNECTIONS (top view)
Discharge
1
14
+VS
Threshold
Control
Voltage
Reset
2
13
Discharge
3
12
4
11
Output
5
10
Threshold
Control
Voltage
Reset
Trigger
6
9
Output
GND
7
8
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
VCC
Reset
TS556
4 / 10
14
R
R1
2 / 12
Threshold
Control
Voltage
Q
+
Output
5/9
R
-
A
3 / 11
S
R
+
Trigger
6/8
-
B
R
1 / 13
Discharge
7
Ground
FUNCTION TABLE
RESET
TRIGGER
THRESHOLD
OUTPUT
Low
x
x
Low
High
Low
x
High
High
High
High
Low
High
High
Low
Previous State
LOW <-----> Level Voltage ≤ Min voltage specificed
HIGH <-----> Level Voltage ≥ Max voltage specificed
x
<-----> Irrelevant
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
Tj
Tstg
PD
Parameter
Value
Unit
Supply Voltage
+18
V
Junction Temperature
+150
°C
-65 to +150
°C
1560
830
mW
Value
Unit
+2 to +16
V
Storage Temperature Range
Power dissipation
o
1)
DIP14
SO14
o
1. T j = 150°C, Tamb = 25 C with Rthja = 80 C/W for DIP14 package
Rthja = 150oC/W for SO14 package
OPERATING CONDITIONS
Symbol
2/11
Parameter
VCC
Supply Voltage
Toper
Operating Free Air Temperature Range
TS556C
TS556I
TS556M
0 to +70
-40 to +125
-55 to +125
°C
50k Ω
R6
50k Ω
R5
50k Ω
R4
50k Ω
R3
Control Voltage
50k Ω
R2
50k Ω
R1
Τ1
Τ5
Τ4
Τ2
Τ6
Threshold
Τ7
Τ8 Τ9
R7
Τ11
Τ10
Τ14
Τ15
Τ12
Τ18
Τ13
GND
Τ16
Τ20
V CC
RESET
Τ17
Τ19
Trigger
Τ21
Τ22
Τ23
Τ25
Τ24
Τ26
Τ28
Τ27
Τ29
Τ30
Τ32
Τ31
Τ33
Τ35
Discharge
Τ34
Output
TS556
SCHEMATIC DIAGRAM (1/2 TS556)
3/11
TS556
STATIC ELECTRICAL CHARACTERISTICS
VCC = +2V, Tamb = +25°C, Reset to V CC (unless otherwise specified)
Symbol
Parameter
Min.
Typ.
Max.
Unit
130
400
400
µA
1.3
1.4
1.5
V
0.05
0.2
0.25
V
1
100
nA
0.1
0.3
0.35
V
ICC
Supply Current (no load, High and Low States)
Tmin. ≤ Tamb ≤ Tmax.
VCL
Control Voltage Level
Tmin. ≤ Tamb ≤ Tmax.
VDIS
Discharge Saturation Voltage (Idis = 1mA)
Tmin. ≤ Tamb ≤ Tmax.
IDIS
Discharge Pin Leakage Current
VOL
Low Level Output Voltage (Isink = 1mA)
Tmin. ≤ Tamb ≤ Tmax.
VOH
High Level Output Voltage (Isource = -0.3mA)
Tmin. ≤ Tamb ≤ Tmax.
1.5
1.5
1.9
VTRIG
Trigger Voltage
Tmin. ≤ Tamb ≤ Tmax.
0.4
0.3
0.67
ITRIG
Trigger Current
10
pA
Threshold Current
10
pA
ITH
VRESET
Reset Voltage
Tmin. ≤ Tamb ≤ Tmax.
IRESET
Reset Current
4/11
1.2
1.1
0.4
0.3
1.1
10
V
0.95
1.05
1.5
2.0
V
V
pA
TS556
ELECTRICAL CHARACTERISTICS
VCC = +3V, Tamb = +25°C, Reset to VCC (unless otherwise specified)
Symbol
Parameter
Min.
Typ.
Max.
Unit
180
460
460
µA
2
2.2
2.3
V
0.05
0.2
0.25
V
1
100
nA
0.1
0.3
0.35
V
ICC
Supply Current (no load, High and Low States)
Tmin. ≤ Tamb ≤ Tmax.
VCL
Control Voltage Level
Tmin. ≤ Tamb ≤ Tmax.
VDIS
Discharge Saturation Voltage (Idis = 1mA)
Tmin. ≤ Tamb ≤ Tmax.
IDIS
Discharge Pin Leakage Current
VOL
Low Level Output Voltage (Isink = 1mA)
Tmin. ≤ Tamb ≤ Tmax.
VOH
High Level Output Voltage (Isource = -0.3mA)
Tmin. ≤ Tamb ≤ Tmax.
2.5
2.5
2.9
VTRIG
Trigger Voltage
Tmin. ≤ Tamb ≤ Tmax.
0.9
0.8
1
ITRIG
Trigger Current
10
pA
Threshold Current
10
pA
ITH
VRESET
Reset Voltage
Tmin. ≤ Tamb ≤ Tmax.
IRESET
Reset Current
1.8
1.7
0.4
0.3
V
1.1
1.2
1.1
V
1.5
2.0
V
10
pA
DYNAMIC ELECTRICAL CHARACTERISTICS
VCC = +3V, Tamb = +25°C, Reset to VCC (unless otherwise specified)
Symbol
Parameter
Timing Accuracy (Monostable) 1)
R = 10kΩ, C = 0.1µF
Min.
VCC=+2V
VCC=+3V
Timing Shift with Supply Voltage Variations (Monostable) 1)
R = 10kΩ, C = 0.1µF,VCC = +3V ±0.3V
Timing Shift with Temperature
Tmin. ≤ Tamb ≤ Tmax
fmax
Max.
1
Unit
%
1
0.5
%/V
75
ppm/°C
2
MHz
5
%
0.5
%/V
25
ns
1)
Maximum Astable Frequency 2)
RA = 470Ω, RB = 200Ω, C = 200pF
Astable Frequency Accuracy 2)
RA =RB = 1kΩ to 100kΩ, C = 0.1µF
Timing Shift with Supply Voltage Variations (Astable mode)
RA =RB = 10kΩ, C = 0.1µF, VCC = +3 to +5V
2)
tR
Output Rise Time (Cload = 10pF)
tF
Output Fall Time (Cload = 10pF)
20
Trigger Propagation Delay
100
ns
Minimum Reset Pulse Width (Vtrig = +3V)
350
ns
tPD
tRPW
1.
2.
Typ.
-
ns
see figure 2
see figure 4
5/11
TS556
STATIC ELECTRICAL CHARACTERISTICS
VCC = +5V, Tamb = +25°C, Reset to VCC (unless otherwise specified)
Symbol
Parameter
Min.
Typ.
Max.
Unit
220
500
500
µA
3.3
3.8
3.9
V
0.2
0.3
0.35
V
1
100
nA
0.3
0.6
0.8
V
ICC
Supply Current (no load, High and Low States)
Tmin. ≤ Tamb ≤ Tmax.
VCL
Control Voltage Level
Tmin. ≤ Tamb ≤ Tmax.
VDIS
Discharge Saturation Voltage (Idis = 10mA)
Tmin. ≤ Tamb ≤ Tmax.
IDIS
Discharge Pin Leakage Current
VOL
Low Level Output Voltage (Isink = 8mA)
Tmin. ≤ Tamb ≤ Tmax.
VOH
High Level Output Voltage (Isource = -2mA)
Tmin. ≤ Tamb ≤ Tmax.
4.4
4.4
4.6
VTRIG
Trigger Voltage
Tmin. ≤ Tamb ≤ Tmax.
1.36
1.26
1.67
ITRIG
Trigger Current
10
pA
Threshold Current
10
pA
ITH
2.9
2.8
VRESET
Reset Voltage
Tmin. ≤ Tamb ≤ Tmax.
IRESET
Reset Current
0.4
0.3
V
1.96
2.06
1.1
V
1.5
2.0
V
10
pA
DYNAMIC ELECTRICAL CHARACTERISTICS
VCC = +5V, Tamb = +25°C, Reset to VCC (unless otherwise specified)
Symbol
Parameter
Timing Accuracy (Monostable) 1)
R = 10kΩ, C = 0.1µF
Min.
Typ.
Max.
Unit
2
%
0.38
%/V
75
ppm/°C
2.7
MHz
3
%
Timing Shift with Supply Voltage Variations (Astable mode) 2)
RA =RB = 1kΩ to 100kΩ, C = 0.1µF, VCC = +5 to +12V
0.1
%/V
tR
Output Rise Time (Cload = 10pF)
25
ns
tF
Output Fall Time (Cload = 10pF)
20
Trigger Propagation Delay
100
ns
Minimum Reset Pulse Width (Vtrig = +5V)
350
ns
Timing Shift with Supply Voltage Variations (Monostable) 1)
R = 10kΩ, C = 0.1µF,VCC = +5V ±1V
Timing Shift with Temperature 1)
Tmin. ≤ Tamb ≤ Tmax.
fmax
2)
Maximum Astable Frequency
RA = 470Ω, RB = 200Ω, C = 200pF
2)
Astable Frequency Accuracy
RA =RB = 1kΩ to 100kΩ, C = 0.1µF
tPD
tRPW
1.
2.
6/11
see figure 2
see figure 4
-
ns
TS556
STATIC ELECTRICAL CHARACTERISTICS
VCC = +12V, Tamb = +25°C, Reset to V CC (unless otherwise specified)
Symbol
Parameter
ICC
Supply Current (no load, High and Low States)
Tmin. ≤ Tamb ≤ Tmax.
VCL
Control Voltage Level
Tmin. ≤ Tamb ≤ Tmax.
VDIS
Discharge Saturation Voltage (Idis = 80mA)
Tmin. ≤ Tamb ≤ Tmax.
IDIS
Discharge Pin Leakage Current
VOL
Low Level Output Voltage (Isink = 50mA)
Tmin. ≤ Tamb ≤ Tmax.
VOH
High Level Output Voltage (Isource = -10mA)
Tmin. ≤ Tamb ≤ Tmax.
Min.
7.4
7.3
Typ.
Max.
Unit
340
800
800
µA
8
8.6
8.7
V
0.09
1.6
2.0
V
1
100
nA
1.2
2
2.8
V
10.5
10.5
11
3.2
3.1
4
V
VTRIG
Trigger Voltage
Tmin. ≤ Tamb ≤ Tmax.
ITRIG
Trigger Current
10
pA
Threshold Current
10
pA
ITH
VRESET
Reset Voltage
Tmin. ≤ Tamb ≤ Tmax.
IRESET
Reset Current
0.4
0.3
4.8
4.9
1.1
1.5
2.0
10
V
V
pA
DYNAMIC ELECTRICAL CHARACTERISTICS
VCC = +12V, Tamb = +25°C, Reset to V CC (unless otherwise specified)
Symbol
Parameter
Timing Accuracy (Monostable) 1)
R = 10kΩ, C = 0.1µF
Timing Shift with Supply Voltage Variations (Monostable)
R = 10kΩ, C = 0.1µF,VCC = +5V ±1V
fmax
Min.
Typ.
Max.
Unit
4
%
0.38
%/V
Timing Shift with Temperature
Tmin. ≤ Tamb ≤ Tmax., VCC = +5V
75
ppm/°C
Maximum Astable Frequency
RA = 470Ω, RB = 200Ω, C = 200pF, VCC = +5V
2.7
MHz
3
%
0.1
%/V
2)
Astable Frequency Accuracy
RA =RB = 1kΩ to 100kΩ, C = 0.1µF
Timing Shift with Supply Voltage Variations (Astable mode)
RA =RB = 1kΩ to 100kΩ, C = 0.1µF, VCC = 5 to +12V
1.
2.
see figure 2
see figure 4
7/11
TS556
TYPICAL CHARACTERISTICS
Figure 1 : Supply Current (each timer) versus
Supply Voltage
SUPPLY CURRENT, I CC (µA)
300
200
100
0
4
8
12
16
SUPPLY VOLTAGE, V CC (V)
APPLICATION INFORMATION
MONOSTABLE OPERATION
In the monostable mode,the timer operates like a
one-shot generator. Referring to figure 2, the external capacitor is initially held discharged by a
transistor inside the timer.
Figure 2 :
The circuit triggers on a negative-going input signal when the level reaches 1/3 VCC. Once triggered, the circuit remains in this state until the set
time has elapsed, even if it is triggered again during this interval. The duration of the output HIGH
state is given by t = 1.1 R x C.
It can be noticed that since the charge rate and the
threshold level of the comparator are both directly
proportional to the supply voltage, the timing interval is independent of the supply. Applying a negative pulse simultaneously to the Reset terminal
(pin 4) and the Trigger terminal (pin 2) during the
timing cycle discharges the external capacitor and
causes the cycle to start over. The timing cycle
now starts on the positive edge of the reset pulse.
While the reset pulse is applied, the output is driven to the LOW state.
When a negative trigger pulse is applied to pin 2,
the flip-flop is set, releasing the short circuit across
the external capacitor and driving the output
HIGH. The voltage across the capacitor increases
exponentially with the time constant τ = R x C.
When the voltage across the capacitor equals 2/3
VCC, the comparator resets the flip-flop which then
discharges the capacitor rapidly and drives the
output to its LOW state.
Figure 3 shows the actual waveforms generated in
this mode of operation.
When Reset is not used, it should be tied high to
avoid any possible or false triggering.
Figure 3 :
t = 0.1 ms / div
VCC
INPUT = 2.0V/div
Reset
R
OUTPUT VOLTAGE = 5.0V/div
Trigger
1/2
TS556
C
Out
Control Voltage
0.01µF
CAPACITOR VOLTAGE = 2.0V/div
R = 9.1kΩ , C = 0.01 µ F , R L = 1.0k Ω
8/11
TS556
ASTABLE OPERATION
When the circuit is connected as shown in figure 4
(pin 2 and 6 connected) it triggers itself and free
runs as a multivibrator. The external capacitor
charges through RA and RB and discharges
through RB only. Thus the duty cycle may be precisely set by the ratio of these two resistors.
In the astable mode of operation, C charges and
discharges between 1/3 VCC and 2/3 VCC. As in
the triggered mode, the charge and discharge
times and therefore frequency, are independent of
the supply voltage.
Figure 5 shows actual waveforms generated in
this mode of operation.
The charge time (output HIGH) is given by :
t1 = 0.693 (RA + RB) C
and the discharge time (output LOW) by :
t2 = 0.693 x RB x C
Thus the total period T is given by :
T = t1 + t2 = 0.693 (RA + 2R B) C
The frequency of oscillation is then :
1
1.44
f = --- = -------------------------------------T ( RA + 2 R B ) C
The duty cycle is given by :
RB
D = --------------------------R A + 2 RB
Figure 5:
Figure 4:
t = 0.5 ms / div
VCC
OUTPUT VOLTAGE = 5.0V/div
Reset
RA
Out
1/2
TS556
Control
Voltage
0.01 µ F
RB
C
CAPACITOR VOLTAGE = 1.0V/div
R = R = 4.8 kΩ, C = 0.1 µ F , R L = 1.0k Ω
A
B
9/11
TS556
PACKAGE MECHANICAL DATA
14 PINS - PLASTIC DIP
Millimeters
Inches
Dimensions
Min.
a1
B
b
b1
D
E
e
e3
F
i
L
Z
10/11
Typ.
0.51
1.39
Max.
Min.
1.65
0.020
0.055
0.5
0.25
Typ.
0.065
0.020
0.010
20
0.787
8.5
2.54
15.24
0.335
0.100
0.600
7.1
5.1
0.280
0.201
3.3
1.27
Max.
0.130
2.54
0.050
0.100
TS556
PACKAGE MECHANICAL DATA
14 PINS - PLASTIC MICROPACKAGE (SO)
G
c1
s
e3
b1
e
a1
b
A
a2
C
L
E
D
M
8
1
7
F
14
Millimeters
Inches
Dimensions
Min.
A
a1
a2
b
b1
C
c1
D (1)
E
e
e3
F (1)
G
L
M
S
Typ.
Max.
Min.
1.75
0.2
1.6
0.46
0.25
0.1
0.35
0.19
Typ.
0.069
0.008
0.063
0.018
0.010
0.004
0.014
0.007
0.5
Max.
0.020
45° (typ.)
8.55
5.8
8.75
6.2
0.336
0.228
1.27
7.62
3.8
4.6
0.5
0.344
0.244
0.050
0.300
4.0
5.3
1.27
0.68
0.150
0.181
0.020
0.157
0.208
0.050
0.027
8° (max.)
Note : (1) D and F do not include mold flash or protrusions - Mold flash or protrusions shall not exceed 0.15mm (.066 inc) ONLY FOR DATA BOOK.
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
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