STMicroelectronics TS556 Datasheet
Publicité
Publicité
SO14
(plastic micropackage)
Pin connections
(top view)
Discharge
Threshold
Control
Voltage
Reset
Output
Trigger
G N D
5
6
7
3
4
1
2
14
13
12
11
10
9
8
+V
S
Discharge
Threshold
Control
Voltage
Reset
Output
Trigger
Features
• Very low power consumption:
– 220 µA typ at V
CC
= 5 V
– 180 µA typ at V
CC
= 3 V
• High maximum astable frequency 2.7 MHz
• Pin-to-pin and functionally compatible with bipolar NE556
(a)
• Wide voltage range: 2 V to 16 V
• Supply current spikes reduced during output transitions
• High input impedance: 10
12
Ω
• Output compatible with TTL, CMOS and logic
MOS
TS556
Low-power dual CMOS timer
Datasheet
-
production data
Description
The TS556 is a dual CMOS timer which offers a
I very low consumption:
(I cc(TYP)
TS556 = 220 µA at V cc(TYP)
NE556
= 6 mA),
CC
= 5 V versus f and high frequency:
(f
(max.)
(max.)
TS556 = 2.7 MHz versus
NE556
= 0.1 MHz)
In both monostable and astable modes, 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
Due to the high input impedance (10
12
Ω), timing capacitors can also be minimized.
a. Terminated product
June 2015
This is information on a product in full production.
DocID4078 Rev 3 1/19
www.st.com
Contents
Contents
TS556
Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 3
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
SO14 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2/19 DocID4078 Rev 3
TS556
1
Absolute maximum ratings and operating conditions
Absolute maximum ratings and operating conditions
Symbol
Table 1. Absolute maximum ratings
Parameter Value Unit
V
CC
I
OUT
R thja
R thjc
T j
T stg
ESD
Supply voltage
Output current
Thermal resistance junction to ambient
(1)
Thermal resistance junction to case
Junction Temperature
Storage Temperature Range
Human body model (HBM)
(2)
Machine model (MM)
(3)
Charged device model (CDM)
(4)
18
± 100
105
31
150
-65 to 150
1200
200
1000
V mA
°C/W
°C
V
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
1.5k
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.
Symbol
Table 2. Operating conditions
Parameter Value Unit
V
CC
I
OUT
T oper
Supply voltage
Output sink current
Output source current
Operating free air temperature range
2 to 16
10
50
-40 to 125
V mA
°C
DocID4078 Rev 3 3/19
19
Schematic diagram
Figure 1. Schematic diagram (1/2 TS556)
TS556
4/19 DocID4078 Rev 3
TS556
Note:
Schematic diagram
Figure 2. Block diagram
Reset V
CC
14
4 / 10
T S 5 5 6
R
2 / 12
Threshold
Control
Voltage
3 / 11
+
-
A
R
Trigger
6 / 8
R
7
Ground
+
-
B
R 1
Q
R
S
5 / 9
Output
1 / 13
Discharge
Reset
Low
High
Table 3. Functions table
Trigger Threshold
x
Low x
High
High
Low
Low: level voltage
≤ minimum voltage specified
High: level voltage
≥ maximum voltage specified
x: irrelevant
Output
Low
High
Low
Previous state
DocID4078 Rev 3 5/19
19
Electrical characteristics TS556
V
CC
= 2 V, T
Table 4. Static electrical characteristics amb
= 25 °C, reset to V
CC
(unless otherwise specified)
Parameter Min.
Typ.
Max.
Symbol
I
TRIG
I
TH
V
RESET
I
I
V
V
V
I
V
CC
CL
DIS
DIS
V
OL
OH
TRIG
RESET
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
= 1 mA)
T min
≤ T amb
≤ T max
Discharge pin leakage current
Low level output voltage (I sink
= 1 mA)
T min
≤ T amb
≤ T max
High level output voltage (I source
= -0.3 mA)
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
1.2
1.1
1.5
1.5
0.4
0.3
0.4
0.3
130
1.3
0.05
1
0.1
1.9
0.67
10
10
1.1
10
0.95
1.05
1.5
2.0
400
400
1.4
1.5
0.2
0.25
100
0.3
0.35
Unit
µA
V nA
V pA
V pA
6/19 DocID4078 Rev 3
TS556 Electrical characteristics
Table 5. Static electrical characteristics
V
CC
= 3 V, T amb
= 25 °C, reset to V
CC
(unless otherwise specified)
Parameter Min.
Typ.
Max.
Symbol
I
TRIG
I
TH
V
RESET
I
I
V
V
V
I
V
CC
CL
DIS
DIS
V
OL
OH
TRIG
RESET
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
= 1 mA)
T min
≤ T amb
≤ T max
Discharge pin leakage current
Low level output voltage (I sink
= 1 mA)
T min
≤ T amb
≤ T max
High level output voltage (I source
= -0.3 mA)
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
1.8
1.7
2.5
2.5
0.9
0.8
0.4
0.3
180
2
0.05
1
0.1
2.9
1
10
10
1.1
10
1.1
1.2
1.5
2.0
460
460
2.2
2.3
0.2
0.25
100
0.3
0.35
Unit
µA
V nA
V pA
V pA
DocID4078 Rev 3 7/19
19
Electrical characteristics TS556
V
CC
= 3 V, T
Table 6. Dynamic electrical characteristics amb
= 25 °C, reset to V
CC
(unless otherwise specified)
Parameter Min.
Typ.
Max.
Symbol
f max tR tF t
PD
Timing accuracy (monostable)
(1)
R = 10 k Ω, C = 0.1 µF, V
CC
R = 10 k
Ω, C = 0.1 µF, V
CC
= 2 V
= 3 V
Timing shift with supply voltage variations
(monostable)
R = 10 k Ω, C = 0.1 µF, V
CC
= 3 V ± 0.3 V
T min
≤ T amb
≤ T max
Maximum astable frequency
(2)
R
A
= 470 Ω, R
B
= 200 Ω, C = 200 pF
R
A
= R
B
= 1 k Ω to 100 kΩ, C = 0.1 µF
Timing shift with supply voltage variations
(astable mode)
R
A
= R
B
= 10 k
Ω, C = 0.1 µF, V
CC
= 3 to 5 V
Output rise time (C load
= 10 pF)
Output fall time (C load
= 10 pF)
Trigger propagation delay tRPW
Minimum reset pulse width (V
1. See
2. See
trig
= 3 V)
—
1
1
0.5
75
2
5
0.5
25
20
100
350
—
Unit
%
%/V ppm/°C
MHz
%
%/V ns
8/19 DocID4078 Rev 3
TS556 Electrical characteristics
V
CC
= 5 V, T
Table 7. Static electrical characteristics amb
= 25 °C, reset to V
CC
(unless otherwise specified)
Parameter Min.
Typ.
Max.
Symbol
I
TRIG
I
TH
V
RESET
I
I
V
V
V
I
V
CC
CL
DIS
DIS
V
OL
OH
TRIG
RESET
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
= 10 mA)
T min
≤ T amb
≤ T max
Discharge pin leakage current
Low level output voltage (I sink
= 8 mA)
T min
≤ T amb
≤ T max
High level output voltage (I source
= -2 mA)
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
2.9
2.8
4.4
4.4
1.36
1.26
0.4
0.3
220
3.3
0.2
1
0.3
4.6
1.67
10
10
1.1
10
1.96
2.06
1.5
2.0
500
500
3.8
3.9
0.3
0.35
100
0.6
0.8
Unit
µA
V nA
V pA
V pA
DocID4078 Rev 3 9/19
19
Electrical characteristics TS556
V
CC
= 5 V, T
Table 8. Dynamic electrical characteristics amb
= 25 °C, reset to V
CC
(unless otherwise specified)
Parameter Min.
Typ.
Max.
Symbol
f max tR tF t
PD
Timing accuracy (monostable)
(1)
R = 10 k Ω, C = 0.1 µF
Timing shift with supply voltage variations
(monostable)
R = 10 k
Ω, C = 0.1 µF, V
CC
= 5 V ± 1 V
T min.
≤ T amb
≤ T max
Maximum astable frequency
(2)
R
A
= 470
Ω, R
B
= 200
Ω, C = 200 pF
R
A
= R
B
= 1 k
Ω to 100 kΩ, C = 0.1 µF
Timing shift with supply voltage variations
(astable mode)
R
A
= R
V
CC
B
= 1 k Ω to 100 kΩ, C = 0.1 µF,
= 5 to 12 V
Output rise time (C load
= 10 pF)
Output fall time (C load
= 10 pF)
Trigger propagation delay tRPW
Minimum reset pulse width (V
1. See
2. See
trig
= 5 V)
—
2
0.38
75
2.7
3
0.1
25
20
100
350
—
Unit
%
%/V ppm/°C
MHz
%
%/V ns
10/19 DocID4078 Rev 3
TS556 Electrical characteristics
Symbol
V
CC
= 12 V, T
Table 9. Static electrical characteristics amb
= 25 °C, reset to V
CC
(unless otherwise specified)
Parameter Min.
Typ.
Max.
I
TRIG
I
TH
V
RESET
I
I
V
V
V
I
V
CC
CL
DIS
DIS
V
OL
OH
TRIG
RESET
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
= 80 mA)
T min
≤ T amb
≤ T max
Discharge pin leakage current
Low level output voltage (I sink
= 50 mA)
T min
≤ T amb
≤ T max
High level output voltage (I source
= -10 mA)
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
7.4
7.3
10.5
10.5
3.2
3.1
0.4
0.3
340
8
0.09
1
1.2
11
4
10
10
1.1
10
1.6
2.0
100
2
2.8
800
800
8.6
8.7
4.8
4.9
1.5
2.0
Unit
µA
V nA
V pA
V pA
V
CC
Table 10. Dynamic electrical characteristics
= 12 V, T amb
= 25 °C, reset to V
CC
(unless otherwise specified)
Parameter Min.
Typ.
Max.
Symbol
f max
Timing accuracy (monostable)
(1)
R = 10 k Ω, C = 0.1 µF
Timing shift with supply voltage variations
(monostable)
R = 10 k
Ω, C = 0.1 µF, V
CC
= 5 V ± 1 V
Timing shift with temperature
T min
≤ T amb
≤ T max,
V
CC
= 5 V
Maximum astable frequency
R
A
= 470
Ω, R
B
= 200
Ω, C = 200 pF, V
CC
= 5 V
Astable frequency accuracy
(2)
R
A
= R
B
= 1 k
Ω to 100 kΩ, C = 0.1 µF
Timing shift with supply voltage variations
(astable mode)
R
A
= R
V
CC
B
= 1 k
Ω to 100 kΩ, C = 0.1 µF,
= 5 to 12 V
1. See
2. See
—
4
0.38
75
2.7
3
0.1
—
Unit
%
%/V ppm/°C
MHz
%
%/V
DocID4078 Rev 3 11/19
19
Electrical characteristics
Figure 3. Supply current (per timer) versus supply voltage
300
200
100
0 4 8 12 16
TS556
12/19 DocID4078 Rev 3
TS556 Application information
In monostable mode, the timer operates like a one-shot generator. Referring to
external capacitor is initially held discharged by a transistor inside the timer, as shown in
Figure 4. Application schematic
V
C C
Reset
R
Trigger
1/2
T S 5 5 6
C
Out
Control Voltage
0.01 F
The circuit triggers on a negative-going input signal when the level reaches 1/3 V
CC
. 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 V
CC
, the comparator resets the flip-flop which then discharges the capacitor rapidly and drives the output to its LOW state.
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
DocID4078 Rev 3 13/19
19
Application information TS556
When the circuit is connected as shown in
(pins 2 and 6 connected) it triggers itself and runs as a multivibrator. The external capacitor charges through R
A discharges through R two resistors.
B
and R
B
and
only. Thus the duty cycle may be precisely set by the ratio of these
In the astable mode of operation, C charges and discharges between 1/3 V
CC
and 2/3 V
As in the triggered mode, the charge and discharge times and therefore frequency, are
CC independent of the supply voltage.
.
Figure 6. Application schematic
V
C C
Reset
R
A
Out
1/2
T S 5 5 6
R
B
Control
Voltage
0.01 F
C
shows the actual waveforms generated in this mode of operation.
The charge time (output HIGH) is given by: t1 = 0.693 (R
A
+ R
B
) C and the discharge time (output LOW) by: t2 = 0.693 x R
B
x C
Thus the total period, T, is given by:
T = t1 + t2 = 0.693 (R
A
+ 2R
B
) C
The frequency of oscillation is then:
--- =
1.44
+
)C
The duty cycle is given by:
D =
Figure 7. Timing diagram
t = 0.5 ms / div
OUTPUT VOLTAGE = 5.0V/div
14/19
CAPACITOR VOLTAGE = 1.0V/div
DocID4078 Rev 3
TS556 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
5.1 SO14 package information
Figure 8. SO14 package outline
TS556
Note:
16/19
Ref.
h
L e
H k ddd
D
E
B
C
A
A1
A2
Min.
1.35
0.10
1.10
0.33
0.19
8.55
3.80
5.80
0.25
0.40
Table 11. SO14 mechanical data
Dimensions
Millimeters
Typ.
Max.
1.75
0.25
1.65
0.51
0.25
8.75
4.0
Min.
0.05
0.004
0.04
0.01
0.007
0.33
0.15
1.27
6.20
0.50
1.27
8° (max.)
0.22
0.009
0.015
0.10
Inches
Typ.
0.05
Max.
0.068
0.009
0.06
0.02
0.009
0.34
0.15
0.24
0.02
0.05
0.004
D and F dimensions do not include mold flash or protrusions. Mold flash or protrusions must not exceed 0.15 mm.
DocID4078 Rev 3
TS556 Ordering information
Order code
TS556IDTTR
Table 12. Order code table
Temperature range Package Packaging
-40 °C to 125 °C SO14 Tape and reel
Marking
556I
DocID4078 Rev 3 17/19
19
Revision history TS556
Date
01-Feb-2003
28-Oct-2008
30-Jun-2015
Revision
Table 13. Document revision history
Changes
1
2
3
Initial release.
Document reformatted.
Added output current, ESD and thermal resistance values in
Table 1: Absolute maximum ratings
Added output current values in
.
Updated
Section 5.1: DIP14 package information
and
Section 5.1: SO14 package information
.
: 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
: removed all order codes of revision 2
and added new order code TS556IDTTR.
18/19 DocID4078 Rev 3
TS556
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Information in this document supersedes and replaces information previously supplied in any prior versions of this document.
© 2015 STMicroelectronics – All rights reserved
DocID4078 Rev 3 19/19
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