TS556MD [STMICROELECTRONICS]
LOW POWER DUAL CMOS TIMERS; 低功率双路CMOS定时器
| 型号： | TS556MD |
| 厂家： | 
ST |
| 描述： | LOW POWER DUAL CMOS TIMERS |
| 文件： | 总11页 (文件大小：100K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TS556C,I,M
LOW POWER DUAL CMOS TIMERS
.
.
.
VERYLOW POWER CONSUMPTION :
100µA typ at VCC = 5V
HIGH MAXIMUM ASTABLE FREQUENCY
2.7MHz
PIN-TO-PIN AND FUNCTIONALLY
COMPATIBLE WITH BIPOLAR NE555
VOLTAGE RANGE : +2V to +18V
HIGH OUTPUT CURRENT CAPABILITY
SUPPLY CURRENT SPIKES REDUCED
DURING OUTPUT TRANSITIONS
HIGH INPUT IMPEDANCE : 1012 Ω
OUTPUT COMPATIBLE WITH TTL,CMOS
AND LOGIC MOS
.
.
.
.
N
D
DIP14
SO14
(Plastic Package)
(Plastic Micropackage)
.
.
ORDER CODES
Package
Temperature
Range
Part Number
N
●
●
●
D
●
●
●
TS556C
TS556I
0oC, +70oC
-40, +125oC
-55, +125oC
TS556M
Examples : TS556CD , TS556IN
PIN CONNECTIONS (top view)
Discharge
Threshold
14
13
12
11
10
9
1
2
3
4
5
6
7
+VS
DESCRIPTION
Discharge
The TS556is a dual CMOS timer which offersvery
low consumption (Icc(TYP) TS556 = 200µA
Icc(TYP) NE556 = 6mA) and high frequency
(f(max.) TS556 = 2.7MHz -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.
Control
Voltage
Threshold
Control
Voltage
Reset
Output
Trigger
GND
Reset
Output
Trigger
8
Timing capacitors can also be minimized due to
high input impedance (1012 Ω).
October 1997
1/11
TS556C,I,M
BLOCK DIAGRAM
V
R e se t
C C
TS556
14
4 / 10
R
R1
R
2 / 12
3 / 11
Q
O utp u t
Thre s ho ld
+
5 / 9
Control
Vo lta g e
-
A
B
S
R
+
6 / 8
Tr ig g e r
-
R
7
1 / 13
Dis cha rge
G ro un d
RESET
Low
TRIGGER
x
THRESHOLD
OUTPUT
Low
x
x
High
Low
High
High
High
High
High
Low
Low
High
Previous State
LOW
HIGH
X
↔
↔
↔
Level Voltage ≤ Min voltage specified
Level Voltage ≥ Max voltage specified
Irrelevant
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
Parameter
Value
+18
Unit
V
oC
Supply Voltage
TJ
Junction Temperature
+150
THERMAL CHARACTERISTICS
Symbol
Parameter
Value
Unit
oC
TOPER
Operating Temperature Range
TS556C
TS556I
TS556M
0 to +70
-40 to +125
-55 to +125
TSTG
Storage Temperature Range
-65 to +150
oC
2/11
TS556C,I,M
SCHEMATIC DIAGRAM (1/2 TS556)
3/11
TS556C,I,M
OPERATING CONDITIONS
Symbol
Parameter
Value
Unit
VCC
Supply Voltage
+2 to +16
V
STATIC ELECTRICAL CHARACTERISTICS
VCC = +2V, Tamb = +25oC, Reset to VCC (unless otherwise specified)
TS556C-TS556I-TS556M
Symbol
Parameter
Unit
Min.
Typ
Max.
ICC
Supply Current (no load, High and Low States)
Tamb = + 25oC
µA
130
400
400
T
min. ≤ Tamb ≤ Tmax
.
VCL
Vdis
VOL
VOH
Vtrig
Control Voltage
V
V
V
V
V
Tamb = + 25oC
1.2
1.1
1.3
0.05
0.1
1.4
1.5
T
min. ≤ Tamb ≤ Tmax
.
Discharge Saturation Voltage (Idis = 1mA)
Tamb = + 25oC
0.2
0.25
T
min. ≤ Tamb ≤ Tmax.
Low Level Output Voltage (Isink = 1mA)
Tamb = + 25oC
0.3
0.35
T
min. ≤ Tamb ≤ Tmax.
High Level Output Voltage (Isource = -0.3mA)
Tamb = + 25oC
1.5
1.5
1.9
T
min. ≤ Tamb ≤ Tmax
.
.
Trigger Voltage
Tamb = + 25oC
0.4
0.3
0.67
0.95
1.05
T
min. ≤ Tamb ≤ Tmax
Itrig
ITH
Trigger Current
Threshold Current
10
10
pA
pA
V
Vreset
Reset Voltage
Tamb = + 25oC
0.4
0.3
1.1
1.5
2.0
T
min. ≤ Tamb ≤ Tmax
.
Ireset
idis
Reset Current
10
1
pA
nA
Discharge Pin Leakage Current
100
4/11
TS556C,I,M
STATIC ELECTRICAL CHARACTERISTICS (continued)
VCC = +5V, Tamb = +25oC, Reset to VCC (unless otherwise specified)
TS556C-TS556I-TS556M
Symbol
Parameter
Unit
Min.
Typ
Max.
ICC
Supply Current (no load, High and Low States)
Tamb = + 25oC
µA
220
500
500
T
min. ≤ Tamb ≤ Tmax
.
VCL
Vdis
VOL
VOH
Vtrig
Control Voltage
V
V
V
V
V
Tamb = + 25oC
2.9
2.8
3.3
0.2
3.8
3.9
T
min. ≤ Tamb ≤ Tmax
.
Discharge Saturation Voltage (Idis = 10mA)
Tamb = + 25oC
0.3
0.35
T
min. ≤ Tamb ≤ Tmax.
Low Level Output Voltage (Isink = 8mA)
Tamb = + 25oC
0.3
0.6
0.8
T
min. ≤ Tamb ≤ Tmax.
High Level Output Voltage (Isource = -2mA)
Tamb = + 25oC
4.4
4.4
4.6
T
min. ≤ Tamb ≤ Tmax
.
.
Trigger Voltage
Tamb = + 25oC
1.36
1.26
1.67
1.96
2.06
T
min. ≤ Tamb ≤ Tmax
Itrig
ITH
Trigger Current
Threshold Current
10
10
pA
pA
V
Vreset
Reset Voltage
Tamb = + 25oC
0.4
0.3
1.1
1.5
2.0
T
min. ≤ Tamb ≤ Tmax
.
Ireset
Idis
Reset Current
10
1
pA
nA
Discharge Pin Leakage Current
100
5/11
TS556C,I,M
STATIC ELECTRICAL CHARACTERISTICS (continued)
VCC = +12V, Tamb = +25oC, Reset to VCC (unless otherwise specified)
TS556C-TS556I-TS556M
Symbol
Parameter
Unit
Min.
Typ
Max.
ICC
Supply Current (no load, High and Low States)
Tamb = + 25oC
µA
340
800
800
T
min. ≤ Tamb ≤ Tmax
.
VCL
Vdis
VOL
VOH
Vtrig
Control Voltage
V
V
V
V
V
Tamb = + 25oC
7.4
7.3
8
0.09
1.2
11
8.6
8.7
T
min. ≤ Tamb ≤ Tmax
.
Discharge Saturation Voltage (Idis = 80mA)
Tamb = + 25oC
1.6
2.0
T
min. ≤ Tamb ≤ Tmax.
Low Level Output Voltage (Isink = 50mA)
Tamb = + 25oC
2
2.8
T
min. ≤ Tamb ≤ Tmax.
High Level Output Voltage (Isource = -10mA)
Tamb = + 25oC
10.5
10.5
T
min. ≤ Tamb ≤ Tmax
.
.
Trigger Voltage
Tamb = + 25oC
3.2
3.1
4
4.8
4.9
T
min. ≤ Tamb ≤ Tmax
Itrig
ITH
Trigger Current
Threshold Current
10
10
pA
pA
V
Vreset
Reset Voltage
Tamb = + 25oC
0.4
0.3
1.1
1.5
2.0
T
min. ≤ Tamb ≤ Tmax
.
Ireset
Idis
Reset Current
10
1
pA
nA
Discharge Pin Leakage Current
100
6/11
TS556C,I,M
DYNAMIC ELECTRICAL CHARACTERISTICS
Tamb = +25oC, Reset to VCC (unless otherwisespecified)
TS556C-TS556I-TS556M
Symbol
Parameter
Unit
Min
Typ
Max
Timing Accuracy (Monostable) - (note 1)
%
R = 10kΩ , C = 0.1µF
VCC = + 2V
VCC = + 5V
VCC = +12V
1
2
4
Timing Shift with supply voltage variations (Monostable)
%/V
R = 10kΩ , C = 0.1µF, VCC = + 5V +/-1V
0.38
75
Timing Shift with temperature
ppm/°C
Tmin. ≤ Tamb ≤ Tmax., VCC = + 5V
fmax
Maximum astable frequency
MHz
%
RA = 470Ω , RB = 200Ω, C = 200pF , VCC = + 5V
2.7
Astable frequency accuracy - (note 2)
R
A = RB = 1kΩ to 100kΩ, C = 0.1µF
3
3
VCC = + 5V
VCC = + 12V
Timing Shift with supply voltage variations (Astable mode)
%/V
0.1
RA = RB = 1kΩ to 100kΩ, C = 0.1µF, VCC = 5 to+ 12V
tr
tf
Output Rise Time (VCC = + 5V , C
= 10pF)
25
20
ns
ns
ns
ns
load
Output Fall Time (VCC = + 5V , Cload = 10pF)
Trigger Propagation Delay (VCC = + 5V)
Minimum Reset Pulse Width (Vtrig = + 5V)
-
tpd
trpw
100
350
Notes : 1. See Figure 2
2. See Figure 4
7/11
TS556C,I,M
TYPICAL CHARACTERISTICS
The circuit triggers on a negative-goinginput signal
whenthelevel reaches1/3VCC. Oncetriggered,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.
Notice that since the charge rate and the threshold
level of the comparator are both directly propor-
tional to supply voltage, the timing interval is inde-
pendent of supply. Applying a negative pulse
simultaneously to the Reset terminal (pin 4 or 10)
and the Trigger terminal (pin 2 or 8) during the
timing cycle discharges the external capacitor and
causesthe cycle to start over. The timingcycle now
starts on the positive edge of the reset pulse.
During the time the reset pulse is applied, the
output is driven to its LOW state.
Figure 1 : Supply Current (each timer) versus
Supply Voltage
300
200
100
0
4
8
12
16
When a negative trigger pulse is applied to the
trigger terminal, the flip-flop is set, releasing the
short circuit across the external capacitor and driv-
ing the output HIGH. The voltage across the ca-
pacitor increases exponentially with the time
constant τ = R x C.
SUPPLY VOLTAGE, VCC (V)
APPLICATION INFORMATION
MONOSTABLE OPERATION
When the voltage across the capacitor equals 2/3
In the monostable mode,the timer functions as a
one-shot. Referring to figure 2 the external capaci-
tor is initially held discharged by a transistor inside
the timer.
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 generatedin
this mode of operation.
When Reset is not used, it should be tied high to
avoid any possible or false triggering.
Figure 2
Figure 3
V
CC
Reset
t = 0.1 ms / div
INPUT = 2.0V/div
R
Trigger
1/2
C
OUTPUT VOLTAGE = 5.0V/div
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
TS556C,I,M
ASTABLE OPERATION
mode of operation.
The charge time (output HIGH) is given by :
t1 = 0.693 (RA + RB) C
When the circuit is connected as shown in figure 4
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
dischargesbetween1/3 VCC and2/3 VCC. As inthe
triggered mode, the charge and discharge times
and therefore frequency, are independent of the
supply voltage.
and the discharge time (output LOW) by :
t2 = 0.693 (RB) C
Thus the total period T is given by :
T = t1 + t2 = 0.693 (RA + 2RB) C
The frequency of oscillation is then :
1
T
1.44
(RA + 2RB)C
f =
=
RB
RA + 2R
Figure 5 shows actual waveformsgenerated in this
The duty cycle is given by : D =
B
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
= R = 4.8 kΩ, C = 0.1 F , R = 1.0kΩ
R
L
A
B
9/11
TS556C,I,M
PACKAGE MECHANICAL DATA
14 PINS - PLASTIC DIP
Millimeters
Inches
Typ.
Dimensions
Min.
0.51
1.39
Typ.
Max.
Min.
0.020
0.055
Max.
a1
B
b
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
TS556C,I,M
PACKAGE MECHANICAL DATA
14 PINS - PLASTIC MICROPACKAGE (SO)
Millimeters
Dimensions
Inches
Typ.
Min.
Typ.
Max.
1.75
0.2
Min.
Max.
0.069
0.008
0.063
0.018
0.010
A
a1
a2
b
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
45o (typ.)
8.55
5.8
8.75
6.2
0.336
0.228
0.334
0.244
E
e
1.27
7.62
0.050
0.300
e3
F
3.8
4.6
0.5
4.0
5.3
0.150
0.181
0.020
0.157
0.208
0.050
0.027
G
L
1.27
0.68
M
S
8o (max.)
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility
for the consequences of use of suchinformation 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 otherwiseunder anypatent or patent rights of SGS-THOMSON Microelectronics.
Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all
information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life
support devices or systems without express written approval of SGS-THOMSON Microelectronics.
1997 SGS-THOMSON Microelectronics – Printed in Italy – AllRights Reserved
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11/11
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