TS556 [STMICROELECTRONICS]
LOW POWER DUAL CMOS TIMER; 低功率双路CMOS计时器
| 型号： | TS556 |
| 厂家： | 
ST |
| 描述： | LOW POWER DUAL CMOS TIMER |
| 文件： | 总11页 (文件大小：131K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TS556
LOW POWER DUAL CMOS TIMER
■ VERY LOW POWER CONSUMPTION :
220 µA typ at V = 5V
CC
180 µA typ at V = 3V
CC
■ HIGH MAXIMUM ASTABLE FREQUENCY
2.7MHz
■ PIN-TO-PIN AND FUNCTIONALLY
COMPATIBLE WITH BIPOLAR NE556
N
DIP14
(Plastic Package)
■ WIDE VOLTAGE RANGE : +2V to +16V
■ HIGH OUTPUT CURRENT CAPABILITY
■ SUPPLY CURRENT SPIKES REDUCED
DURING OUTPUT TRANSITIONS
12
■ HIGH INPUT IMPEDANCE : 10
Ω
■ OUTPUT COMPATIBLE WITH TTL,CMOS
AND LOGIC MOS
D
SO14
(Plastic Micropackage)
DESCRIPTION
The TS556 is a dual CMOS timer which offers
very low consumption (Icc(TYP) TS556 = 220µA at
V
=+5V versus Icc(TYP) NE556 = 6mA) and high
CC
frequency ff(max.) TS556 = 2.7MHz versus f(max.
)
NE556 = 0.1 MHz)
PIN CONNECTIONS (top view)
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.
Discharge
Threshold
14
13
12
11
10
9
1
2
3
4
5
6
7
+VS
Timing capacitors can also be minimized due to
12
Discharge
high input impedance (10 Ω).
Control
Voltage
Threshold
Control
Voltage
ORDER CODES
Reset
Output
Trigger
GND
Package
Part Number
Temperature Range
Reset
N
D
Output
Trigger
TS556C
TS556I
0°C, +70°C
-40°C, +125°C
-55°C, +125°C
•
•
•
•
•
•
8
TS556M
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
Re se t
CC
TS556
4 / 10
14
R
R1
R
2 / 12
3 / 11
Q
O utp ut
Thre sho ld
+
5 / 9
Co ntro l
Vo lta g e
-
A
B
S
R
+
6 / 8
Trig g e r
-
R
7
1 / 13
Disc ha rg e
Gro und
FUNCTION TABLE
RESET
Low
TRIGGER
THRESHOLD
OUTPUT
x
x
Low
High
High
Low
High
High
x
High
High
Low
Low
High
Previous State
LOW <-----> Level Voltage ≤ Min voltage specificed
HIGH <-----> Level Voltage ≥ Max voltage specificed
x
<-----> Irrelevant
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
Supply Voltage
+18
+150
V
CC
T
Junction Temperature
°C
°C
j
T
Storage Temperature Range
-65 to +150
stg
1)
1560
830
Power dissipation
DIP14
SO14
P
mW
D
1. T = 150°C, T
= 25oC with Rthja = 80oC/W for DIP14 package
Rthja = 150oC/W for SO14 package
amb
j
OPERATING CONDITIONS
Symbol
Parameter
Value
Unit
V
Supply Voltage
+2 to +16
V
CC
Operating Free Air Temperature Range
TS556C
TS556I
TS556M
0 to +70
-40 to +125
-55 to +125
T
°C
oper
2/11
TS556
SCHEMATIC DIAGRAM (1/2 TS556)
3/11
TS556
STATIC ELECTRICAL CHARACTERISTICS
V
= +2V, T
= +25°C, Reset to V
(unless otherwise specified)
CC
amb
CC
Parameter
Supply Current (no load, High and Low States)
Symbol
Min.
Typ.
Max.
Unit
130
400
400
I
µA
CC
T
≤ T ≤ T
min.
amb
max.
Control Voltage Level
≤ T ≤ T
1.2
1.1
1.3
1.4
1.5
V
V
CL
T
min.
amb
max.
Discharge Saturation Voltage (I = 1mA)
dis
0.05
0.2
0.25
V
V
nA
V
DIS
T
≤ T
≤ T
min.
amb
max.
I
Discharge Pin Leakage Current
1
100
DIS
Low Level Output Voltage (I
= 1mA)
0.1
0.3
0.35
sink
V
OL
T
≤ T
≤ T
max.
min.
amb
High Level Output Voltage (I
= -0.3mA)
1.5
1.5
1.9
source
V
V
V
OH
T
≤ T
≤ T
≤ T
min.
Trigger Voltage
≤ T
amb
max.
max.
0.4
0.3
0.67
0.95
1.05
V
TRIG
T
min.
amb
I
Trigger Current
10
10
pA
pA
TRIG
I
Threshold Current
Reset Voltage
TH
0.4
0.3
1.1
1.5
2.0
V
V
RESET
T
≤ T
≤ T
min.
amb
max.
I
Reset Current
10
pA
RESET
4/11
TS556
ELECTRICAL CHARACTERISTICS
= +3V, T = +25°C, Reset to V (unless otherwise specified)
V
CC
amb
CC
Parameter
Supply Current (no load, High and Low States)
Symbol
Min.
Typ.
Max.
Unit
180
460
460
I
µA
CC
T
≤ T ≤ T
min.
amb
max.
Control Voltage Level
≤ T ≤ T
1.8
1.7
2
2.2
2.3
V
V
CL
T
min.
amb
max.
Discharge Saturation Voltage (I = 1mA)
dis
0.05
0.2
0.25
V
V
nA
V
DIS
T
≤ T
≤ T
min.
amb
max.
I
Discharge Pin Leakage Current
1
100
DIS
Low Level Output Voltage (I
= 1mA)
0.1
0.3
0.35
sink
V
OL
T
≤ T
≤ T
max.
min.
amb
High Level Output Voltage (I
= -0.3mA)
2.5
2.5
2.9
1
source
V
V
V
OH
T
≤ T
≤ T
≤ T
min.
Trigger Voltage
≤ T
amb
max.
0.9
0.8
1.1
1.2
V
TRIG
T
min.
amb
max.
I
Trigger Current
10
10
pA
pA
TRIG
I
Threshold Current
Reset Voltage
TH
0.4
0.3
1.1
1.5
2.0
V
V
RESET
T
≤ T
≤ T
min.
amb
max.
I
Reset Current
10
pA
RESET
DYNAMIC ELECTRICAL CHARACTERISTICS
V
= +3V, T
= +25°C, Reset to V (unless otherwise specified)
CC
amb
CC
Symbol
Parameter
Min.
Typ.
Max.
Unit
1)
Timing Accuracy (Monostable)
1
1
%
R = 10kΩ, C = 0.1µF
V
V
=+2V
=+3V
1)
CC
CC
Timing Shift with Supply Voltage Variations (Monostable)
0.5
75
2
%/V
ppm/°C
MHz
%
R = 10kΩ, C = 0.1µF,V = +3V ±0.3V
CC
1)
Timing Shift with Temperature
T
≤ T
≤ T
min.
amb max
2)
Maximum Astable Frequency
f
max
R
= 470Ω, R = 200Ω, C = 200pF
A
B
2)
Astable Frequency Accuracy
R
=R = 1kΩ to 100kΩ, C = 0.1µF
5
A
B
2)
Timing Shift with Supply Voltage Variations (Astable mode)
=R = 10kΩ, C = 0.1µF, V = +3 to +5V
R
0.5
25
%/V
ns
A
B
CC
t
Output Rise Time (C
= 10pF)
R
load
= 10pF)
load
t
Output Fall Time (C
20
-
ns
F
t
Trigger Propagation Delay
100
350
ns
PD
t
Minimum Reset Pulse Width (V
= +3V)
ns
RPW
trig
1.
2.
see figure 2
see figure 4
5/11
TS556
STATIC ELECTRICAL CHARACTERISTICS
V
= +5V, T
= +25°C, Reset to V (unless otherwise specified)
CC
amb
CC
Parameter
Supply Current (no load, High and Low States)
Symbol
Min.
Typ.
Max.
Unit
220
500
500
I
µA
CC
T
≤ T
≤ T
min.
Control Voltage Level
≤ T ≤ T
amb
max.
2.9
2.8
3.3
0.2
3.8
3.9
V
V
CL
T
min.
amb
max.
Discharge Saturation Voltage (I = 10mA)
dis
0.3
0.35
V
V
nA
V
DIS
T
≤ T
≤ T
min.
amb
max.
I
Discharge Pin Leakage Current
1
100
DIS
Low Level Output Voltage (I
= 8mA)
0.3
0.6
0.8
sink
V
OL
T
≤ T ≤ T
amb max.
min.
High Level Output Voltage (I
source
= -2mA)
4.4
4.4
4.6
V
V
V
OH
T
≤ T
≤ T
min.
Trigger Voltage
≤ T
amb
max.
1.36
1.26
1.67
1.96
2.06
V
TRIG
T
≤ T
min.
Trigger Current
amb
max.
I
10
10
pA
pA
TRIG
I
Threshold Current
Reset Voltage
TH
0.4
0.3
1.1
1.5
2.0
V
V
RESET
T
≤ T
≤ T
min.
amb
max.
I
Reset Current
10
pA
RESET
DYNAMIC ELECTRICAL CHARACTERISTICS
V
= +5V, T
= +25°C, Reset to V (unless otherwise specified)
CC
amb
CC
Symbol
Parameter
Min.
Typ.
Max.
Unit
1)
Timing Accuracy (Monostable)
2
%
R = 10kΩ, C = 0.1µF
1)
Timing Shift with Supply Voltage Variations (Monostable)
0.38
75
%/V
ppm/°C
MHz
%
R = 10kΩ, C = 0.1µF,V = +5V ±1V
CC
1)
Timing Shift with Temperature
T
≤ T
≤ T
.
min.
amb
max
2)
Maximum Astable Frequency
f
max
2.7
3
R
= 470Ω, R = 200Ω, C = 200pF
A
B
2)
Astable Frequency Accuracy
R
=R = 1kΩ to 100kΩ, C = 0.1µF
A
B
2)
Timing Shift with Supply Voltage Variations (Astable mode)
=R = 1kΩ to 100kΩ, C = 0.1µF, V = +5 to +12V
R
0.1
25
%/V
ns
A
B
CC
t
Output Rise Time (C
= 10pF)
R
load
= 10pF)
load
t
Output Fall Time (C
20
-
ns
F
t
Trigger Propagation Delay
100
350
ns
PD
t
Minimum Reset Pulse Width (V
= +5V)
trig
ns
RPW
1.
see figure 2
see figure 4
2.
6/11
TS556
STATIC ELECTRICAL CHARACTERISTICS
V
= +12V, T
= +25°C, Reset to V
(unless otherwise specified)
CC
amb
CC
Parameter
Supply Current (no load, High and Low States)
Symbol
Min.
Typ.
Max.
Unit
340
800
800
I
µA
CC
T
≤ T ≤ T
min.
amb
max.
Control Voltage Level
≤ T ≤ T
7.4
7.3
8
8.6
8.7
V
V
CL
T
min.
amb
max.
Discharge Saturation Voltage (I = 80mA)
dis
0.09
1.6
2.0
V
V
nA
V
DIS
T
≤ T ≤ T
min.
amb max.
I
Discharge Pin Leakage Current
1
100
DIS
Low Level Output Voltage (I
= 50mA)
1.2
2
2.8
sink
V
OL
T
≤ T
≤ T
max.
min.
amb
High Level Output Voltage (I
= -10mA)
10.5
10.5
11
4
source
V
V
V
OH
T
≤ T
≤ T
≤ T
min.
Trigger Voltage
≤ T
amb
max.
max.
3.2
3.1
4.8
4.9
V
TRIG
T
min.
amb
I
Trigger Current
10
10
pA
pA
TRIG
I
Threshold Current
Reset Voltage
TH
0.4
0.3
1.1
1.5
2.0
V
V
RESET
T
≤ T
≤ T
min.
amb
max.
I
Reset Current
10
pA
RESET
DYNAMIC ELECTRICAL CHARACTERISTICS
V
= +12V, T
= +25°C, Reset to V
(unless otherwise specified)
CC
CC
Symbol
amb
Parameter
Min.
Typ.
Max.
Unit
1)
Timing Accuracy (Monostable)
4
0.38
75
%
%/V
ppm/°C
MHz
%
R = 10kΩ, C = 0.1µF
Timing Shift with Supply Voltage Variations (Monostable)
R = 10kΩ, C = 0.1µF,V
= +5V ±1V
CC
Timing Shift with Temperature
≤ T ≤ T
max., CC
T
V = +5V
min.
amb
Maximum Astable Frequency
= 470Ω, R = 200Ω, C = 200pF, V = +5V
CC
f
max
R
2.7
3
A
B
2)
Astable Frequency Accuracy
=R = 1kΩ to 100kΩ, C = 0.1µF
R
A
B
Timing Shift with Supply Voltage Variations (Astable mode)
=R = 1kΩ to 100kΩ, C = 0.1µF, V = 5 to +12V
R
0.1
%/V
A
B
CC
1.
2.
see figure 2
see figure 4
7/11
TS556
TYPICAL CHARACTERISTICS
The circuit triggers on a negative-going input sig-
nal when the level reaches 1/3 V . Once trig-
CC
Figure 1 : Supply Current (each timer) versus
gered, the circuit remains in this state until the set
time has elapsed, even if it is triggered again dur-
ing this interval. The duration of the output HIGH
state is given by t = 1.1 R x C.
Supply Voltage
300
200
100
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 inter-
val is independent of the supply. Applying a nega-
tive 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 driv-
en 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
0
4
8
12
16
SUPPLY VOLTAGE, VCC (V)
APPLICATION INFORMATION
MONOSTABLE OPERATION
V
, the comparator resets the flip-flop which then
CC
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.
In the monostable mode,the timer operates like a
one-shot generator. Referring to figure 2, the ex-
ternal capacitor is initially held discharged by a
transistor inside the timer.
Figure 2 :
Figure 3 :
t = 0.1 ms / div
V
CC
INPUT = 2.0V/div
Reset
R
OUTPUT VOLTAGE = 5.0V/div
Trigger
1/2
C
TS556
Out
Control Voltage
µ
0.01 F
CAPACITOR VOLTAGE = 2.0V/div
µ
Ω
Ω
R = 9.1k , C = 0.01 F , R = 1.0k
L
8/11
TS556
ASTABLE OPERATION
Figure 5 shows actual waveforms generated in
this mode of 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
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
Thus the total period T is given by :
T = t1 + t2 = 0.693 (R + 2R ) C
The frequency of oscillation is then :
charges through R and R and discharges
B
A
B
through R only. Thus the duty cycle may be pre-
B
A
B
cisely set by the ratio of these two resistors.
In the astable mode of operation, C charges and
1
T
1.44
f = -- = -------------------------------------
(RA + 2RB)C
discharges between 1/3 V
and 2/3 V . As in
CC
CC
the triggered mode, the charge and discharge
times and therefore frequency, are independent of
the supply voltage.
The duty cycle is given by :
RB
D = ---------------------------
RA + 2RB
Figure 4:
Figure 5:
t = 0.5 ms / div
V
CC
OUTPUT VOLTAGE = 5.0V/div
Reset
RA
Out
1/2
R
B
TS556
Control
Voltage
C
µ
0.01
F
CAPACITOR VOLTAGE = 1.0V/div
µ
Ω Ω
= R = 4.8 k , C = 0.1 F , R = 1.0k
L
R
A
B
9/11
TS556
PACKAGE MECHANICAL DATA
14 PINS - PLASTIC DIP
Millimeters
Inches
Typ.
Dimensions
Min.
Typ.
Max.
Min.
Max.
a1
B
b
0.51
1.39
0.020
0.055
1.65
0.065
0.5
0.020
0.010
b1
D
E
e
0.25
20
0.787
8.5
2.54
15.24
0.335
0.100
0.600
e3
F
7.1
5.1
0.280
0.201
i
L
3.3
0.130
Z
1.27
2.54
0.050
0.100
10/11
TS556
PACKAGE MECHANICAL DATA
14 PINS - PLASTIC MICROPACKAGE (SO)
L
G
c1
b
e
s
e3
E
D
M
14
1
8
7
Millimeters
Dimensions
Inches
Typ.
Min.
Typ.
Max.
Min.
Max.
A
a1
a2
b
1.75
0.2
0.069
0.008
0.063
0.018
0.010
0.1
0.004
1.6
0.35
0.19
0.46
0.25
0.014
0.007
b1
C
0.5
0.020
c1
D (1)
E
45° (typ.)
8.55
5.8
8.75
6.2
0.336
0.228
0.344
0.244
e
1.27
7.62
0.050
0.300
e3
F (1)
G
3.8
4.6
0.5
4.0
5.3
0.150
0.181
0.020
0.157
0.208
0.050
0.027
L
1.27
0.68
M
S
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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11/11
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