NE556D - Philips Semiconductors / NXP Semiconductors

Philips Semiconductors Linear Products Product specification

NE/SA/SE556/NE556-1Dual timer

353

August 31, 1994 853-0035 13721

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. T iming 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

7 8

DISCHARGE

THRESHOLD

CONTROL VOLTAGE

RESET

OUTPUT

TRIGGER

GND

VCC

DISCHARGE

THRESHOLD

CONTROL VOLTAGE

RESET

OUTPUT

TRIGGER

•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

DISCHARGE

THRESHOLD

CONTROL VOLTAGE

RESET

OUTPUT

TRIGGER

GROUND

VCC

DISCHARGE

THRESHOLD

CONTROL VOLTAGE

RESET

OUTPUT

TRIGGER

COMP

FLIP FLOP

COMP

FLIP FLOP

COMP



Touch-Tone is a registered trademark of AT&T

Philips Semiconductors Linear Products Product specification

NE/SA/SE556/NE556-1Dual timer

August 31, 1994 354

EQUIVALENT SCHEMATIC (Shown for one circuit only)

4.7K

Q18

100K

VCC R1

4.7K R2

330 R4

Q5 Q6 Q7 Q9

5K R12

6.8K

Q19

Q21

R13

3.3K

Q22

OUTPUT

Q23

C B

Q20

R14

220 Q24

Q17

R11

4.7K

R10

3.2

Q16

Q15

Q11 Q12

Q10 Q13

10K

R15

4.7K

R16

100

Q25

Q14

Q2 Q3

Q1 Q4

CONTROL VOLTAGE

THRESHOLD

TRIGGER

RESET

DISCHARGE

GND

ORDERING INFORMATION

DESCRIPTION TEMPERATURE RANGE ORDER CODE DWG #

14-Pin Plastic Small Outline (SO) Package 0 to +70°C NE556D 0175D

14-Pin Ceramic Dual In-Line Package (CERDIP) 0 to +70°C NE556F 0581B

14-Pin Plastic Dual In-Line Package (DIP) 0 to +70°C NE556N 0405B

14-Pin Ceramic Dual In-Line Package (CERDIP) 0 to +70°C NE556-1F 0581B

14-Pin Plastic Dual In-Line Package (DIP) 0 to +70°C NE556-1N 0405B

14-Pin Plastic Dual In-Line Package (DIP) -40°C to +85°C SA556N 0405B

14-Pin Ceramic Dual In-Line Package (CERDIP) -55°C to +125°C SE556F 0581B

14-Pin Plastic Dual In-Line Package (DIP) -55°C to +125°C SE556N 0405B

ABSOLUTE MAXIMUM RATINGS

SYMBOL PARAMETER RATING UNIT

VCC Supply voltage

NE/SA556, NE556-1 +16 V

SE556 +18 V

PDMaximum allowable power dissipation1800 mW

TAOperating temperature range

NE556-1, NE556 0 to +70 °C

SA556 -40 to +85 °C

SE556 -55 to +125 °C

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

Philips Semiconductors Linear Products Product specification

NE/SA/SE556/NE556-1Dual timer

August 31, 1994 355

ELECTRICAL CHARACTERISTICS

TA=25°C, VCC=+5V to +15V, unless otherwise specified.

SYMBOL

PARAMETER

TEST CONDITIONS

SE556 NE/SA556

NE556-1

UNIT

SYMBOL

PARAMETER

TEST CONDITIONS

Min Typ Max Min Typ Max

UNIT

VCC Supply voltage 4.5 18 4.5 16 V

VCC=5V, RL=∞6 10 6 12 mA

ICC Supply current (low state)1

VCC=15V, RL=∞20 24 20 30 mA

Timing error (monostable) RA=2kΩ to 100kΩ

tMInitial accuracy2C=0.1µF 0.5 2.0 0.75 3.0 %

∆tM/∆T Drift with temperature T=1.1 RC 30 100 50 150 ppm/°C

∆tM/∆VSDrift with supply voltage 0.05 0.2 0.1 0.5 %/V

Timing error (astable) RA, RB=1kΩ to 100kΩ

tAInitial accuracy2C=0.µF 4 6 5 13 %

∆tA/∆T Drift with temperature VCC=15V 400 500 400 500 ppm/°C

∆tA/∆VSDrift with supply voltage 0.15 0.6 0.3 1 %/V

Control voltage level

VCC=15V 9.6 10.0 10.4 9.0 10.0 11.0

Control voltage level

VCC=5V 2.9 3.33 3.8 2.6 3.33 4.0

Threshold voltage VCC=15V 9.4 10.0 10.6 8.8 10.0 11.2 V

VTH VCC=5V 2.7 3.33 4.0 2.4 3.33 4.2 V

ITH Threshold current3VCC = 15V, VTH = 10.5V 30 250 30 250 nA

Trigger voltage VCC=15V 4.8 5.0 5.2 4.5 5.0 5.6 V

VTRIG VCC=5V 1.45 1.67 1.9 1.1 1.67 2.2 V

ITRIG Trigger current VTRIG=0V 0.5 0.9 0.5 2.0 µA

VRESET Reset voltage50.4 0.7 1.0 0.4 0.7 1.0 V

Reset current VRESET=0.4V 0.4 0.1 0.4 0.4 0.1 0.6 mA

IRESET Reset current VRESET=0V 0.4 1.0 0.4 1.5 mA

VOL

Output voltage (low)

VCC=15V

VOL

Output voltage (low)

ISINK=10mA 0.1 0.15 0.1 0.25

VOL

ISINK=50mA 0.4 0.5 0.4 0.75

VOL

SE556 2.0 2.25

VOL

NE/SA556 ISINK=100mA 2.0 3.2

VOL

NE556-1 2.0 2.5

Output voltage (low) ISINK=200mA 2.5 2.5

VCC=5V

ISINK=8mA 0.1 0.2 0.25 0.3

ISINK=5mA 0.05 0.15 0.15 0.25

VCC=15V

ISOURCE=200mA 12.5 12.5

VOH Output voltage (high) ISOURCE=100mA 13.0 13.3 12.75 13.3

VCC=5V

ISOURCE=100mA 3.0 3.3 2.75 3.3

tOFF Turn-off time6

NE556-1 VRESET=VCC 0.5 2.0 0.5 µs

tRRise time of output 100 200 100 300 ns

tFFall time of output 100 200 100 300 ns

Discharge leakage current 20 100 20 100 nA

Philips Semiconductors Linear Products Product specification

NE/SA/SE556/NE556-1Dual timer

August 31, 1994 356

ELECTRICAL CHARACTERISTICS (Continued)

SYMBOL

PARAMETER

TEST CONDITIONS

SE556/556-1 NE/SA556/SE556C

NE556-1/SE556-1C

UNIT

SYMBOL

PARAMETER

TEST CONDITIONS

Min Typ Max Min Typ Max

UNIT

Matching characteristics4

Initial accuracy20.5 1.0 1.0 2.0 %

Drift with temperature 10 ±10 ppm/°C

Drift with supply voltage 0.1 0.2 0.2 0.5 %/V

NOTES:

1. Supply current when output is high is typically 1.0mA less.

2. Tested at VCC=5V and VCC=15V.

3. This will determine maximum value of RA+RB. For 15V operation, the max total R=10MΩ, and for 5V operation, the maximum total

R=3.4MΩ.

4. Matching characteristics refer to the difference between performance characteristics for each timer section in the monostable mode.

5. Specified with trigger input high. In order to guarantee reset the voltage at reset pin must be less than or equal to 0.4V. To disable reset

function, the voltage at reset pin has to be greater than 1V.

6. Time measured from a positive-going input pulse from 0 to 0.4 VCC into the threshold to the drop from high to low of the output. Trigger is

tied to threshold.

TYPICAL APPLICATIONS

One feature of the dual timer is that by utilizing both halves it is

possible to obtain sequential timing. By connecting the output of the

first half to the input of the second half via a 0.001µF coupling

capacitor sequential timing may be obtained. Delay t1 is determined

by the first half and t2 by the second half delay.

The first half of the timer is started by momentarily connecting Pin 6

to ground. When it is timed out (determined by 1.1R1C1) the second

half begins. Its duration is determined by 1.1R2C2.

Sequential Timer

All resistor values are in Ω.

NOTE:

VCC VCC VCC VCC VCC

INPUT

OUTPUT 1

OUTPUT 2

50µF

10k 1M

7 11 3

14104

556

.01

.001

.01

1µF

10k

130k

Philips Semiconductors Linear Products Product specification

NE/SA/SE556/NE556-1Dual timer

August 31, 1994 357

TYPICAL PERFORMANCE CHARACTERISTICS

MINIMUM PULSE WIDTH (ns)

SUPPLY CURRENT — mA

V V — VOLTS

CC OUT

V — VOLTS

OUT

V —VOLTS

OUT

NORMALIZED DELAY TIME

PROPAGATION — ns V — VOLTS

OUT

VCC = 15V

1.0

0.1

0.01

1.0 2.0 5.0 10 20 50 100

ISINK — mA

Supply Current

VS Supply Voltage

Minimum Pulse Width

Required for Triggering

150

125

100

00 0.1 0.2 0.3 0.4(XVCC)

LOWEST VOLTAGE LEVEL

OF TRIGGER PULSE

–55oC

0oC

+25oC

+70oC

+125oC

10.0

8.0

6.0

4.0

2.0

05.0 10.0 15.0

+25oC

55oC

SUPPLY VOLTAGE — VOLTS

+125oC

+25oC

55oC

5V = VCC = 15V

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

1.0 2.0 5.0 10 20 50 100

ISOURCE — mA

High Output Voltage Drop

vs Output Source Current

+125oC

55oC+25oC

+125oC

VCC = 5V

1.0

0.1

0.01

1.0 2.0 5.0 10 20 50 100

ISINK — mA

Low Output Voltage

vs Output Sink Current

–55oC

+25oC

+125oC

+25oC

+125oC–55oC

VCC = 10V

Low Output Voltage

vs Output Sink Current

1.0

0.1

0.011.0 2.0 5.0 10 20 50 100

ISINK — mA

+25oC

Low Output Voltae

vs Output Sink Current

1.015

1.010

1.005

1.000

0.995

0.990

0.985 –50 25 0 +25 +50 +75+100 +125

TEMPERATURE — oC

Delay Time

vs Temperature 1.015

1.010

1.005

1.000

0.995

0.990

0.985

0 5 10 15 20

SUPPLY VOLTAGE — V

Delay Time

vs Supply Voltage

300

250

200

150

100

00 0.1 0.2 0.3 0.4

Propagation Delay vs Voltage

Level of Trigger Pulse

+70oC

LOWEST VOLTAGE LEVEL

OF TRIGGER PULSE — XVCC

+125oC

–55oC

0oC

NORMALIZED DELAY TIME