TS556CDT [STMICROELECTRONICS]
Low power dual CMOS timer;
| 型号： | TS556CDT |
| 厂家： | 
ST |
| 描述： | Low power dual CMOS timer 光电二极管 |
| 文件： | 总19页 (文件大小：483K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TS556
Low-power dual CMOS timer
Datasheet - production data
Description
The TS556 is a dual CMOS timer which offers a
very low consumption:
(I
TS556 = 220 µA at V = 5 V versus
NE556 = 6 mA),
cc(TYP)
CC
SO14
(plastic micropackage)
(a)
I
cc(TYP)
and high frequency:
(f
f
TS556 = 2.7 MHz versus
NE556 = 0.1 MHz)
(max.)
(max.)
(a)
Pin connections
In both monostable and astable modes, timing
remains very accurate.
(top view)
The TS556 provides reduced supply current
spikes during output transitions, which enables
Discharge
14
13
12
11
10
9
1
2
3
4
5
6
7
+VS
Threshold
Discharge
the use of lower decoupling capacitors compared
(a)
Control
to those required by bipolar NE556
.
Threshold
Control
Voltage
Voltage
12
Reset
Output
Trigger
G N D
Due to the high input impedance (10 Ω), timing
Reset
capacitors can also be minimized.
Output
Trigger
8
Features
• Very low power consumption:
– 220 µA typ at V = 5 V
CC
– 180 µA typ at V = 3 V
CC
• High maximum astable frequency 2.7 MHz
• Pin-to-pin and functionally compatible with
(a)
bipolar NE556
• Wide voltage range: 2 V to 16 V
• Supply current spikes reduced during output
transitions
12
• High input impedance: 10
Ω
• Output compatible with TTL, CMOS and logic
MOS
a. Terminated product
June 2015
DocID4078 Rev 3
1/19
This is information on a product in full production.
www.st.com
Contents
TS556
Contents
1
2
3
4
Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 3
Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1
4.2
Monostable operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Astable operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1
SO14 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6
7
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2/19
DocID4078 Rev 3
TS556
Absolute maximum ratings and operating conditions
1
Absolute maximum ratings and operating conditions
Table 1. Absolute maximum ratings
Symbol
Parameter
Value
Unit
VCC
IOUT
Rthja
Rthjc
Tj
Supply voltage
Output current
18
± 100
105
V
mA
Thermal resistance junction to ambient (1)
Thermal resistance junction to case (1)
Junction Temperature
°C/W
°C
31
150
Tstg
Storage Temperature Range
Human body model (HBM) (2)
Machine model (MM) (3)
-65 to 150
1200
200
ESD
V
Charged device model (CDM) (4)
1000
1. Short-circuits can cause excessive heating. These values are typical and specified for a four layers PCB.
2. Human body model: a 100 pF capacitor is charged to the specified voltage, then discharged through a
1.5kΩ resistor between two pins of the device. This is done for all couples of connected pin combinations
while the other pins are floating.
3. Machine model: a 200 pF capacitor is charged to the specified voltage, then discharged directly between
two pins of the device with no external series resistor (internal resistor < 5 Ω). This is done for all couples of
connected pin combinations while the other pins remain floating.
4. Charged device model: all pins plus package are charged together to the specified voltage and then
discharged directly to the ground.
Table 2. Operating conditions
Symbol
Parameter
Value
Unit
VCC
Supply voltage
2 to 16
V
Output sink current
Output source current
10
50
IOUT
Toper
mA
°C
Operating free air temperature range
-40 to 125
DocID4078 Rev 3
3/19
19
Schematic diagram
TS556
2
Schematic diagram
Figure 1. Schematic diagram (1/2 TS556)
4/19
DocID4078 Rev 3
TS556
Schematic diagram
Figure 2. Block diagram
V
Reset
CC
TS556
14
4 / 10
R
R 1
R
2 / 12
3 / 11
Q
Output
Threshold
+
5 / 9
Control
Voltage
-
A
B
S
R
+
6 / 8
Trigger
-
R
7
1 / 13
Discharge
Ground
Table 3. Functions table
Trigger Threshold
Reset
Output
Low
x
Low
High
x
Low
High
High
Low
Low
High
Previous state
Note:
Low: level voltage ≤ minimum voltage specified
High: level voltage ≥ maximum voltage specified
x: irrelevant
DocID4078 Rev 3
5/19
19
Electrical characteristics
TS556
3
Electrical characteristics
Table 4. Static electrical characteristics
= 2 V, T = 25 °C, reset to V (unless otherwise specified)
amb
V
CC
CC
Symbol
Parameter
Min.
Typ.
Max.
Unit
Supply current (no load, high and low states)
130
400
400
ICC
µA
Tmin ≤Tamb ≤Tmax
Control voltage level
1.2
1.1
1.3
1.4
1.5
VCL
Tmin ≤Tamb ≤Tmax
V
Discharge saturation voltage (Idis = 1 mA)
0.05
0.2
VDIS
IDIS
Tmin ≤Tamb ≤Tmax
0.25
Discharge pin leakage current
1
100
nA
Low level output voltage (Isink = 1 mA)
0.1
0.3
VOL
Tmin ≤Tamb ≤Tmax
0.35
High level output voltage (Isource = -0.3 mA)
1.5
1.5
1.9
VOH
V
Tmin ≤Tamb ≤Tmax
Trigger voltage
0.4
0.3
0.67
0.95
1.05
VTRIG
Tmin ≤Tamb ≤Tmax
ITRIG
ITH
Trigger current
10
10
pA
Threshold current
Reset voltage
0.4
0.3
1.1
1.5
2.0
VRESET
V
Tmin ≤Tamb ≤Tmax
IRESET Reset current
10
pA
6/19
DocID4078 Rev 3
TS556
Electrical characteristics
Table 5. Static electrical characteristics
= 3 V, T = 25 °C, reset to V (unless otherwise specified)
amb
V
CC
CC
Symbol
Parameter
Min.
Typ.
Max.
Unit
Supply current (no load, high and low states)
180
460
460
ICC
µA
Tmin ≤Tamb ≤Tmax
Control voltage level
1.8
1.7
2
2.2
2.3
VCL
Tmin ≤Tamb ≤Tmax
V
Discharge saturation voltage (Idis = 1 mA)
0.05
0.2
VDIS
IDIS
Tmin ≤Tamb ≤Tmax
0.25
Discharge pin leakage current
1
100
nA
Low level output voltage (Isink = 1 mA)
0.1
0.3
VOL
Tmin ≤Tamb ≤Tmax
0.35
High level output voltage (Isource = -0.3 mA)
2.5
2.5
2.9
1
VOH
V
Tmin ≤Tamb ≤Tmax
Trigger voltage
0.9
0.8
1.1
1.2
VTRIG
Tmin ≤Tamb ≤Tmax
ITRIG
ITH
Trigger current
10
10
pA
Threshold current
Reset voltage
0.4
0.3
1.1
1.5
2.0
VRESET
V
Tmin ≤Tamb ≤Tmax
IRESET Reset current
10
pA
DocID4078 Rev 3
7/19
19
Electrical characteristics
TS556
Table 6. Dynamic electrical characteristics
= 3 V, T = 25 °C, reset to V (unless otherwise specified)
V
CC
amb
CC
Symbol
Parameter
Min.
Typ.
Max.
Unit
Timing accuracy (monostable) (1)
%
R = 10 kΩ, C = 0.1 µF, VCC= 2 V
R = 10 kΩ, C = 0.1 µF, VCC = 3 V
1
1
Timing shift with supply voltage variations
(monostable) (1)
%/V
R = 10 kΩ, C = 0.1 µF, VCC = 3 V ± 0.3 V
Timing shift with temperature (1)
0.5
75
2
ppm/°C
MHz
%
Tmin ≤Tamb ≤Tmax
Maximum astable frequency (2)
fmax
RA = 470 Ω, RB = 200 Ω, C = 200 pF
Astable frequency accuracy (2)
—
—
RA = RB = 1 kΩ to 100 kΩ, C = 0.1 µF
5
Timing shift with supply voltage variations
(astable mode) (2)
%/V
ns
RA = RB = 10 kΩ, C = 0.1 µF, VCC = 3 to 5 V
Output rise time (Cload = 10 pF)
Output fall time (Cload = 10 pF)
0.5
25
t
R
t
20
F
tPD
Trigger propagation delay
100
350
t
Minimum reset pulse width (Vtrig = 3 V)
RPW
1. See Figure 4
2. See Figure 6
8/19
DocID4078 Rev 3
TS556
Electrical characteristics
Table 7. Static electrical characteristics
= 5 V, T = 25 °C, reset to V (unless otherwise specified)
amb
V
CC
CC
Symbol
Parameter
Min.
Typ.
Max.
Unit
Supply current (no load, high and low states)
220
500
500
ICC
µA
Tmin ≤Tamb ≤Tmax
Control voltage level
2.9
2.8
3.3
0.2
3.8
3.9
VCL
Tmin ≤Tamb ≤Tmax
V
Discharge saturation voltage (Idis = 10 mA)
0.3
VDIS
IDIS
Tmin ≤Tamb ≤Tmax
0.35
Discharge pin leakage current
1
100
nA
Low level output voltage (Isink = 8 mA)
0.3
0.6
0.8
VOL
Tmin ≤Tamb ≤Tmax
High level output voltage (Isource = -2 mA)
4.4
4.4
4.6
VOH
V
Tmin ≤Tamb ≤Tmax
Trigger voltage
1.36
1.26
1.67
1.96
2.06
VTRIG
Tmin ≤Tamb ≤Tmax
ITRIG
ITH
Trigger current
10
10
pA
Threshold current
Reset voltage
0.4
0.3
1.1
1.5
2.0
VRESET
V
Tmin ≤Tamb ≤Tmax
IRESET Reset current
10
pA
DocID4078 Rev 3
9/19
19
Electrical characteristics
TS556
Table 8. Dynamic electrical characteristics
= 5 V, T = 25 °C, reset to V (unless otherwise specified)
V
CC
amb
CC
Symbol
Parameter
Min.
Typ.
Max.
Unit
Timing accuracy (monostable) (1)
%
R = 10 kΩ, C = 0.1 µF
2
Timing shift with supply voltage variations
(monostable) (1)
%/V
R = 10 kΩ, C = 0.1 µF, VCC = 5 V ± 1 V
Timing shift with temperature (1)
0.38
75
ppm/°C
MHz
Tmin. ≤Tamb ≤Tmax
(2)
Maximum astable frequency
fmax
RA = 470 Ω, RB = 200 Ω, C = 200 pF
Astable frequency accuracy (2)
2.7
3
—
—
%
RA = RB = 1 kΩ to 100 kΩ, C = 0.1 µF
Timing shift with supply voltage variations
(astable mode) (2)
%/V
RA = RB = 1 kΩ to 100 kΩ, C = 0.1 µF,
VCC = 5 to 12 V
0.1
t
Output rise time (Cload = 10 pF)
Output fall time (Cload = 10 pF)
Trigger propagation delay
25
20
R
t
F
ns
tPD
100
350
t
Minimum reset pulse width (Vtrig = 5 V)
RPW
1. See Figure 4
2. See Figure 6
10/19
DocID4078 Rev 3
TS556
Electrical characteristics
Table 9. Static electrical characteristics
= 12 V, T = 25 °C, reset to V (unless otherwise specified)
amb
V
CC
CC
Symbol
Parameter
Min.
Typ.
Max.
Unit
Supply current (no load, high and low states)
340
800
800
ICC
µA
Tmin ≤Tamb ≤Tmax
Control voltage level
7.4
7.3
8
8.6
8.7
VCL
Tmin ≤Tamb ≤Tmax
V
Discharge saturation voltage (Idis = 80 mA)
0.09
1.6
2.0
VDIS
IDIS
Tmin ≤Tamb ≤Tmax
Discharge pin leakage current
1
100
nA
Low level output voltage (Isink = 50 mA)
1.2
2
VOL
Tmin ≤Tamb ≤Tmax
2.8
High level output voltage (Isource = -10 mA)
10.5
10.5
11
4
VOH
V
Tmin ≤Tamb ≤Tmax
Trigger voltage
3.2
3.1
4.8
4.9
VTRIG
Tmin ≤Tamb ≤Tmax
ITRIG
ITH
Trigger current
10
10
pA
Threshold current
Reset voltage
0.4
0.3
1.1
1.5
2.0
VRESET
V
Tmin ≤Tamb ≤Tmax
IRESET Reset current
10
pA
Table 10. Dynamic electrical characteristics
= 12 V, T = 25 °C, reset to V (unless otherwise specified)
V
CC
amb
CC
Symbol
Parameter
Min.
Typ.
Max.
Unit
Timing accuracy (monostable) (1)
%
R = 10 kΩ, C = 0.1 µF
4
Timing shift with supply voltage variations
(monostable)
%/V
R = 10 kΩ, C = 0.1 µF, VCC = 5 V ± 1 V
0.38
75
Timing shift with temperature
ppm/°C
MHz
%
Tmin ≤Tamb ≤Tmax, VCC = 5 V
—
—
Maximum astable frequency
fmax
RA = 470 Ω, RB = 200 Ω, C = 200 pF, VCC = 5 V
Astable frequency accuracy (2)
2.7
3
RA = RB = 1 kΩ to 100 kΩ, C = 0.1 µF
Timing shift with supply voltage variations
(astable mode)
%/V
0.1
RA = RB = 1 kΩ to 100 kΩ, C = 0.1 µF,
VCC = 5 to 12 V
1. See Figure 4
2. See Figure 6
DocID4078 Rev 3
11/19
19
Electrical characteristics
TS556
Figure 3. Supply current (per timer) versus supply voltage
300
200
100
0
4
8
12
(V)
16
SUPPLY VOLTAGE, V
C C
12/19
DocID4078 Rev 3
TS556
Application information
4
Application information
4.1
Monostable operation
In 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, as shown in
Figure 4.
Figure 4. Application schematic
V
C C
Reset
R
Trigger
1/2
C
TS556
Out
Control Voltage
0.01
F
The circuit triggers on a negative-going input signal when the level reaches 1/3 V . Once
CC
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 V , the comparator resets the flip-flop
CC
which then discharges the capacitor rapidly and drives the output to its LOW state.
Figure 5 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 5. Timing diagram
t = 0.1 ms / div
INPUT = 2.0V/div
OUTPUT VOLTAGE = 5.0V/div
CAPACITOR VOLTAGE = 2.0V/div
R = 9.1k
, C = 0.01 F , R = 1.0k
L
DocID4078 Rev 3
13/19
19
Application information
TS556
4.2
Astable operation
When the circuit is connected as shown in Figure 6 (pins 2 and 6 connected) it triggers itself
and runs as a multivibrator. The external capacitor charges through R and R and
A
B
discharges through R only. Thus the duty cycle may be precisely set by the ratio of these
B
two resistors.
In the astable mode of operation, C charges and discharges between 1/3 V and 2/3 V
.
CC
CC
As in the triggered mode, the charge and discharge times and therefore frequency, are
independent of the supply voltage.
Figure 6. Application schematic
V
C
C
Reset
R
R
A
Out
1/2
B
TS556
Control
Voltage
C
0.01
F
Figure 7 shows the actual waveforms generated in this mode of operation.
The charge time (output HIGH) is given by:
t1 = 0.693 (R + R ) C
A
B
and the discharge time (output LOW) by:
t2 = 0.693 x R x C
B
Thus the total period, T, is given by:
T = t1 + t2 = 0.693 (R + 2R ) C
A
B
The frequency of oscillation is then:
1
T
1.44
(RA + 2RB)C
f = --- = -------------------------------------
The duty cycle is given by:
RB
D = ---------------------------
RA + 2RB
Figure 7. Timing diagram
t = 0.5 ms / div
OUTPUT VOLTAGE = 5.0V/div
CAPACITOR VOLTAGE = 1.0V/div
R
= R = 4.8 k , C = 0.1 F , R = 1.0k
L
B
A
14/19
DocID4078 Rev 3
TS556
Package information
5
Package information
In order to meet environmental requirements, ST offers these devices in different grades of
®
®
ECOPACK packages, depending on their level of environmental compliance. ECOPACK
specifications, grade definitions and product status are available at: www.st.com.
®
ECOPACK is an ST trademark.
DocID4078 Rev 3
15/19
19
Package information
TS556
5.1
SO14 package information
Figure 8. SO14 package outline
Table 11. SO14 mechanical data
Dimensions
Millimeters
Inches
Typ.
Ref.
Min.
Typ.
Max.
Min.
Max.
A
A1
A2
B
1.35
0.10
1.10
0.33
0.19
8.55
3.80
1.75
0.25
1.65
0.51
0.25
8.75
4.0
0.05
0.004
0.04
0.068
0.009
0.06
0.01
0.02
C
0.007
0.33
0.009
0.34
D
E
0.15
0.15
e
1.27
0.05
H
5.80
0.25
0.40
6.20
0.50
1.27
0.22
0.009
0.015
0.24
0.02
0.05
h
L
k
8° (max.)
ddd
0.10
0.004
Note:
D and F dimensions do not include mold flash or protrusions. Mold flash or protrusions must
not exceed 0.15 mm.
16/19
DocID4078 Rev 3
TS556
Ordering information
6
Ordering information
Table 12. Order code table
Order code
Temperature range
Package
Packaging
Tape and reel
Marking
TS556IDTTR
-40 °C to 125 °C
SO14
556I
DocID4078 Rev 3
17/19
19
Revision history
TS556
7
Revision history
Table 13. Document revision history
Changes
Date
Revision
01-Feb-2003
1
Initial release.
Document reformatted.
Added output current, ESD and thermal resistance values in
Table 1: Absolute maximum ratings.
28-Oct-2008
30-Jun-2015
2
3
Added output current values in Table 2: Operating conditions.
Updated Section 5.1: DIP14 package information and
Section 5.1: SO14 package information.
Features and Description: added footnote to NE556 product to
explain it is terminated.
Removed all references to DIP14 package
Removed all temperature ranges except -40 to 125 °C
Table 12: Order code table: removed all order codes of revision 2
and added new order code TS556IDTTR.
18/19
DocID4078 Rev 3
TS556
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DocID4078 Rev 3
19/19
19
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