SE556N [STMICROELECTRONICS]
GENERAL PURPOSE DUAL BIPOLAR TIMERS; 通用双极双定时器
| 型号： | SE556N |
| 厂家： | 
ST |
| 描述： | GENERAL PURPOSE DUAL BIPOLAR TIMERS |
| 文件： | 总9页 (文件大小：97K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
NE556
SA556 - SE556
GENERAL PURPOSE DUAL BIPOLAR TIMERS
.
.
LOW TURN OFF TIME
MAXIMUM
GREATER THAN 500kHz
TIMING FROM MICROSECONDS TO HOURS
OPERATES IN BOTH ASTABLE AND
MONOSTABLE MODES
HIGH OUTPUT CURRENT CAN SOURCE OR
SINK 200mA
OPERATING
FREQUENCY
.
.
.
.
.
.
ADJUSTABLE DUTY CYCLE
TTL COMPATIBLE
TEMPERATURE STABILITY OF 0.005%
N
D
PER oC
DIP14
SO14
(Plastic Package)
(Plastic Micropackage)
DESCRIPTION
TheNE556 dual monolithic timing circuit is a highly
stablecontroller capableofproducingaccuratetime
delays or oscillation. In the time delay mode of op-
eration,the time is preciselycontrolledby oneexter-
nalresistor and capacitor. For a stable operationas
anoscillator,thefreerunningfrequencyandtheduty
cycle are both accurately controlled with two exter-
nal resistors and one capacitor. The circuit may be
triggered and reset on falling waveforms, and the
output structure can source or sink up to 200mA.
ORDER CODES
Pakcage
Part
Number
Temperature
Range
N
D
NE556
0oC, 70oC
–40oC, 105oC
–55oC, 125oC
•
•
•
•
•
•
SA556
SE556
PIN CONNECTIONS (top view)
Discharge
1
2
3
14
13
12
11
10
9
V
CC
Discharge
Threshold
Control Voltage
Reset
Thres hold
Control Voltage
Reset
4
5
6
7
Output
Output
Trigger
GND
Trigger
8
1/9
July 1998
NE556/SA556/SE556
BLOCK DIAGRAM
+
VCC
Ω
5k
COMP
DISCHARGE
THRESHOLD
R
CONTROL VOLTAGE
FLIP-FLOP
Q
Ω
5k
COMP
OUT
1/2 NE556
TRIGGER
S
INHIBIT/
RESET
Ω
5k
S
RESET
SCHEMATIC DIAGRAM
CONTROL
VOLTAGE
OUTPUT
THRESHOLD
COMPARATOR
5
VCC
R2
Ω
R1
4.7k
R3
4.7k
R4 R8
1k 5k
Ω
R12
6.8k
830
Ω
Ω
Ω
Ω
Q21
Q19
Q5
Q1
Q6
Q7
Q8
Q9
Q20
Q22
Ρ13
3.9kΩ
R11
5kΩ
3
D1
R17
THRESHOLD
TRIGGER
Q4
4.7k
Ω
Q23
Q3
R14
220Ω
R9
5kΩ
Q2
D2
Q11 Q12
Q24
2
4
Q13
Q10
R16
100
R15
4.7kΩ
Q16
Q18
Ω
RES ET
Q15
7
Q17
DISCHARGE
R5
10kΩ
R6
100kΩ
R7
100kΩ
R10
5kΩ
Q14
1
G N D
TRIGGER COMPARATOR
FLIP FLOP
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
Vcc
Supply Voltage
18
Toper
Operating Free Air Temperature Range
for NE556
for SA556
for SE556
0 to 70
–40 to 105
–55 to 125
°C
Tj
Junction Temperature
150
°C
°C
Tstg
Storage Temperature Range
– 65 to 150
2/9
NE556/SA556/SE556
OPERATING CONDITIONS
Symbol
Parameter
SE556
4.5 to 18
VCC
NE556 - SA556
4.5 to 18
VCC
Unit
V
VCC
Supply Voltage
Vth, Vtrig, Vcl, Vreset Maximum Input Voltage
V
ELECTRICAL CHARACTERISTICS
Tamb = +25oC, VCC = +5V to +15V (unless otherwise specified)
SE556
NE556 - SA556
Symbol
Parameter
Unit
Min.
Typ.
Max.
Min.
Typ.
Max.
ICC
Supply Current (RL ∞) (- note 1) - (2 timers)
mA
Low State
VCC = +5V
VCC = +15V
VCC = 5V
6
20
4
10
24
6
20
4
12
30
High State
Timing Error (monostable)
(RA = 2k to 100kΩ, C = 0.1µF)
Initial Accuracy - (note 2)
Drift with Temperature
0.5
30
0.05
2
100
0.2
1
50
0.1
3
%
ppm/°C
%/V
Drift with Supply Voltage
0.5
Timing Error (astable)
(RA, RB = 1kΩ to 100kΩ, C = 0.1µF,
VCC = +15V)
Initial Accuracy - (note 2)
Drift with Temperature
Drift with Supply Voltage
1.5
90
0.15
2.25
150
0.3
%
ppm/°C
%/V
VCL
Control Voltage level
VCC = +15V
V
V
9.6
2.9
10
10.4
3.8
9
10
11
4
VCC = +5V
3.33
2.6
3.33
Vth
Threshold Voltage
VCC = +15V
9.4
2.7
10
3.33
10.6
4
8.8
2.4
10
3.33
11.2
4.2
VCC = +5V
Ith
Threshold Current - (note 3)
0.1
0.25
0.1
0.25
µA
Vtrig
Trigger Voltage
VCC = +15V
VCC = +5V
V
4.8
1.45
5
1.67
5.2
1.9
4.5
1.1
5
1.67
5.6
2.2
Itrig
Trigger Current (Vtrig = 0V)
Reset Voltage - (note 4)
0.5
0.7
0.9
1
0.5
0.7
2.0
1
µA
V
Vreset
Ireset
0.4
0.4
Reset Current
Vreset = +0.4V
Vreset = 0V
mA
0.1
0.4
0.4
1
0.1
0.4
0.4
1.5
VOL
Low Level Output Voltage
VCC = +15V, IO(sink) = 10mA
IO(sink) = 50mA
V
0.1
0.4
2
2.5
0.1
0.05
0.15
0.5
0.1
0.4
2
2.5
0.3
0.25
0.25
0.75
2.5
IO(sink) = 100mA
2.2
IO(sink) = 200mA
VCC = +5V,
IO(sink) = 8mA
IO(sink) = 5mA
0.25
0.2
0.4
0.35
VOH
High Level Output Voltage
VCC = +15V, IO(source) = 200mA
IO(source) = 100mA
V
12.5
13.3
3.3
12.5
13.3
3.3
13
3
12.75
2.75
VCC = +5V,
IO(source) = 100mA
Notes : 1. Supply current when output is high is typically 1mA less.
2. Tested at VCC = +5V and VCC = +15V.
3. This will determine the maximum value of RA + RB for +15V operation the max total is R = 20MΩ and for 5V operation
the max total R = 3.5MΩ.
4. Specified with trigger input high.
3/9
NE556/SA556/SE556
ELECTRICAL CHARACTERISTICS (continued)
SE556
Typ.
20
NE556 - SA556
Symbol
Parameter
Unit
Min.
Max.
Min.
Typ.
Max.
Idis(off) Discharge Pin Leakage Current
(output high) (Vdis = 10V)
100
20
100
nA
Vdis(sat) Discharge pin Saturation Voltage
(output low) - (note 5)
mV
VCC = +15V, Idis = 15mA
180
80
480
200
180
80
480
200
VCC = +5V, Idis = 4.5mA
tr
tf
Output Rise Time
Output Fall Time
100
100
200
200
100
100
300
300
ns
toff
Turn off Time - (note 6) (Vreset = VCC
)
0.5
0.5
µs
Notes : 5. No protection against excessive Pin 7 current is necessary, providing the package dissipation rating will not be exceeded.
6. Time mesaured from a positive going input pulse from 0 to 0.8x VCC into the threshold to the drop from high to low of the
output trigger is tied to treshold.
Figure 1 : Minimum Pulse Width Required for
Figure 2 : Supply Current versus SupplyVoltage
Trigering
Figure 3 : Delay Time versus Temperature
Figure 4 : Low Output Voltage versus Output
Sink Current
4/9
NE556/SA556/SE556
Figure 5 : Low OutputVoltage versus Output
Figure 6 : Low Output Voltage versus Output
Sink Current
Sink Current
Figure 7 : High Output VoltageDrop versus
Figure 8 : Delay Time versus Supply Voltage
Output
Figure 9 : PropagationDelay versus Voltage
Level of Trigger Value
5/9
NE556/SA556/SE556
TYPICAL APPLICATION
50% DUTY CYCLE OSCILLATOR
PULSE WIDTH MODULATOR
V
CC
V
CC
RA
R A
Ω
51k
4
14
(13)
4
14
(13)
Rs
(10)
(10)
Trigger
6
5
(8)
(9)
1
2
6
5
(8)
(9)
1
2
Ω
22k
1/2
NE556
SE556
1/2
NE556
SE556
(12)
(11)
(12)
(11)
3
Output
0.01nF
3
Output
C
C
7
7
MODULATION
INPUT
t1= 0.693 RA.C
t2 = [(RARB) ⁄ (RA + R )] CLn
RB − 2RA
2RB − RA
B
1
1
2
f =
RB
<
RA ti
t1+ t2
t2
t1
6/9
NE556/SA556/SE556
TONE BURST GENERATOR
For a tone burst generator the first timer is used as a monostable and determines the tone duration when
triggered by a positive pulse at pin 6. The second timer is enabledby the high output os the monostable. It
is connectedas an astableand determines the frequency of the tone.
+15V
Reset
14
Vcc
14
4
R A
R t
10
Trigger
5
Discharge
13
6
Trigger
Output
Reset
R B
1/2
NE556
SE556
1/2
NE556
SE556
Discharge
12
Threshold
1
2
8
Trigger
Control
Output
9
Control
3
11
Threshold
Ground
C2
C1
µ
0.01
F
Ground
µ
F
0.01
Ground
T = 1.1 R .C1
1.44
t
f =
R A + 2RB ) C
MONOSTABLE OPERATION
ASTABLE OPERATION
V
CC
V
CC
RL
RL
RA
RB
C
RA
4
4
14
14
(10)
(10)
(8)
Trigger
Output
(13)
1
1
2
(13)
6
1/2
1/2
NE556
SE556
NE556
SE556
5
(9)
Output
(12)
(12)
2
RL
5
(9)
(8)
6
(11)
3
(11)
7
7
3
C
RL
10nF
0.01nF
1.44
Operating frequency
f =
T = 1.1 R A .C
R A + 2RB ) C
t1 = 0.693 (RA + RB) C Output High
t2 = 0.693 RBC OutputLow
t2
t1
7/9
NE556/SA556/SE556
PACKAGE MECHANICAL DATA
14 PINS - PLASTIC DIP
Millimeters
Inches
Typ.
Dimensions
Min.
0.51
1.39
Typ.
Max.
Min.
Max.
a1
B
b
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
0.335
0.100
0.600
2.54
15.24
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
8/9
NE556/SA556/SE556
PACKAGE MECHANICAL DATA
14 PINS - PLASTIC MICROPACKAGE (SO)
Millimeters
Dimensions
Inches
Min.
Typ.
Max.
1.75
0.2
Min.
Typ.
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.)
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consequences of use of such information nor for any infringement of patents or other rights of third parties which may result
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devices or systems without express written approval of STMicroelectronics.
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