Philips Semiconductors Linear Products |
Product specification |
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Dual timer |
NE/SA/SE556/NE556-1 |
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DESCRIPTION
Both the 556 and 556-1 Dual Monolithic timing circuits are highly stable controllers capable of producing accurate time delays or oscillation. The 556 and 556-1 are a dual 555. Timing is provided by an external resistor and capacitor for each timing function. The two timers operate independently of each other, sharing only VCC and ground. The circuits may be triggered and reset on falling waveforms. The output structures may sink or source 200mA.
FEATURES
•Turn-off time less than 2μs (556-1)
•Maximum operating frequency >500kHz (556-1)
•Timing from microseconds to hours
•Replaces two 555 timers
•Operates in both astable and monostable modes
•High output current
•Adjustable duty cycle
•TTL compatible
•Temperature stability of 0.005%/°C
•SE556-1 compliant to MIL-STD or JAN
APPLICATIONS
•Precision timing
•Sequential timing
•Pulse shaping
PIN CONFIGURATION
D, F, N Packages
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DISCHARGE |
1 |
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14 |
VCC |
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THRESHOLD |
2 |
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13 |
DISCHARGE |
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CONTROL VOLTAGE |
3 |
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12 |
THRESHOLD |
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RESET |
4 |
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11 |
CONTROL VOLTAGE |
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OUTPUT |
5 |
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10 |
RESET |
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TRIGGER |
6 |
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9 |
OUTPUT |
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GND |
7 |
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8 |
TRIGGER |
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•Pulse generator
•Missing pulse detector
•Tone burst generator
•Pulse width modulation
•Time delay generator
•Frequency division
•Touch-Tone encoder
•Industrial controls
•Pulse position modulation
•Appliance timing
•Traffic light control
BLOCK DIAGRAM
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1 |
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14 |
VCC |
DISCHARGE |
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13 |
DISCHARGE |
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THRESHOLD |
2 |
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12 |
THRESHOLD |
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COMP |
COMP |
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CONTROL VOLTAGE |
3 |
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11 |
CONTROL VOLTAGE |
4 |
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10 |
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RESET |
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RESET |
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FLIP FLOP |
FLIP FLOP |
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OUTPUT |
5 |
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9 |
OUTPUT |
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6 |
COMP |
COMP |
8 |
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TRIGGER |
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TRIGGER |
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GROUND |
7 |
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Touch-Tone is a registered trademark of AT&T
August 31, 1994 |
353 |
853-0035 13721 |
Philips Semiconductors Linear Products |
Product specification |
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Dual timer |
NE/SA/SE556/NE556-1 |
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EQUIVALENT SCHEMATIC (Shown for one circuit only)
CONTROL VOLTAGE
VCC |
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R1 |
R2 |
R3 |
R4 |
R7 |
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R12 |
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4.7K |
330 |
4.7K |
1K |
5K |
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6.8K |
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Q5 |
Q6 Q7 |
Q9 |
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Q21 |
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Q8 |
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Q19 |
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Q22 |
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R13 |
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3.3K |
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THRESHOLD |
Q1 |
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Q4 |
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R10 |
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Q2 |
Q3 |
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3.2 |
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OUTPUT |
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K |
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Q23 |
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C |
B |
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CB |
R11 |
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Q18 |
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R5 |
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R8 |
4.7K |
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Q20 |
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E |
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10K |
Q11 Q12 |
5K |
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R14 |
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TRIGGER |
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Q10 |
Q13 |
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Q17 |
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220 |
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Q16 |
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Q24 |
RESET |
Q25 |
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Q15 |
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DISCHARGE |
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R6 |
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R9 |
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R15 |
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Q14 |
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100K |
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5K |
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4.7K |
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GND |
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R16 |
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100 |
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ORDERING INFORMATION
DESCRIPTION |
TEMPERATURE RANGE |
ORDER CODE |
DWG # |
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14-Pin Plastic Small Outline (SO) Package |
0 to +70°C |
NE556D |
0175D |
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14-Pin Ceramic Dual In-Line Package (CERDIP) |
0 to +70°C |
NE556F |
0581B |
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14-Pin Plastic Dual In-Line Package (DIP) |
0 to +70°C |
NE556N |
0405B |
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14-Pin Ceramic Dual In-Line Package (CERDIP) |
0 to +70°C |
NE556-1F |
0581B |
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14-Pin Plastic Dual In-Line Package (DIP) |
0 to +70°C |
NE556-1N |
0405B |
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14-Pin Plastic Dual In-Line Package (DIP) |
-40°C to +85°C |
SA556N |
0405B |
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14-Pin Ceramic Dual In-Line Package (CERDIP) |
-55°C to +125°C |
SE556F |
0581B |
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14-Pin Plastic Dual In-Line Package (DIP) |
-55°C to +125°C |
SE556N |
0405B |
ABSOLUTE MAXIMUM RATINGS
SYMBOL |
PARAMETER |
RATING |
UNIT |
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VCC |
Supply voltage |
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NE/SA556, NE556-1 |
+16 |
V |
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SE556 |
+18 |
V |
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PD |
Maximum allowable power dissipation1 |
800 |
mW |
TA |
Operating temperature range |
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NE556-1, NE556 |
0 to +70 |
°C |
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SA556 |
-40 to +85 |
°C |
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SE556 |
-55 to +125 |
°C |
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TSTG |
Storage temperature range |
-65 to +150 |
°C |
TSOLD |
Lead soldering temperature (10sec max) |
+300 |
°C |
NOTES:
1.The junction temperature must be kept below 125°C for the D package and below 150°C for the N and F packages. At ambient temperatures above 25°C, where this limit would be exceeded, the Maximum Allowable Power Dissipation must be derated by the following:
D package 115°C/W N package 80°C/W F package 100°C/W
August 31, 1994 |
354 |
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