STEK NE555 User Manual

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N

E555

Timing from Microseconds to Hours

Direct Replacement for Signetics NE555 Timer

Package

Applications

Pin

Configuration

TOP VIEW

Internal

Blo

c

k Di

gra

m

RESET can overrideTRI

GG

ER,which can override

THRESHOLD

1

BEIJING ESTEK ELECTRONICS CO.,LTD

Description

These devices are monolithic timing circuits capable of producing accurate time delays or oscillation.
Inthe time delaymode of operation, the timed interval is controlled by a single external resistor and capacit
or network. In the astable mode of operation, the frequency and duty cycle may
controlled with twoexternal resistors and a si ngle external capacitor.

be independently

Features

•

•

Astable or Monostable Operation

•

Adjustable Duty Cycle

•

TTL - Compatible Output Can Sink or Source Up to 200 mA

•

Temperature Stability of 0.005% per

•

o

C

DIP-8

SOP-8

•

Precision timing

•

Pulse generation

•

Sequential timing

•

Time delay generation

•

Pulse width modulation

•

Pulse position modulation

•

Missing pulse detector

NE55

5

Absolute Maximum Ratings

(TA=25°C, unless otherwise specified)

Paramete

rMinMax

Units

SupplyVoltage, V

4.5

16

Input Voltage (control,reset, threshold and trigger)

VCCV

Output

Current,

I0±

200mAOperating

Free-Air

Temperature,

TA70

Storage Temperature Range,

T

S

TG

-65+150°C

Electrical characteristics

Initial E

rror

of

Timing Interval (Note 3)

monostable

(Note

5)

TA=25°C13

%

5

13

Temperature Coefficient

monostable

TA=MIN to MAX

50

150

ppm /°C

C=0.1µF.

BEIJING ESTEK ELECTRONICS CO.,LTD

2

CC

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

Operating Supply Voltage Range 4.5 16 V
Threshold Voltage Level VCC=15V 8.8 10 11.2 V

Threshold Current (Note 1) (see Note 1) 30 250 nA
Trigger Voltage Level VCC=15V 4.5 5 5.6 V

Trigger Current Trigger at 0V 0.5 2 µA
Reset Voltage Level 0.3 0.7 1 V
Reset Current Reset at V

Discharge Leakage Current 20 100 nA
Control Voltage Level VCC=15V 9 10 11 V

Low-level Output Voltage VCC=15V IOL=10mA 0.1 0.25

High-level Output Voltage VCC=15V IOL=-100mA 12.75 13.3

Supply Current Output Low, VCC=15V 10 15 mA

Parameter Test conditions

VCC=5V 2.4 3.3 4.2

VCC=5V 1.1 1.67 2.2

CC

Reset at 0V -0.4 -1.5

VCC=5V 2.6 3.3 4

VCC=5V IOL=5mA 0.25 0.35

VCC=5V IOL=-100mA 2.75 3.3

No Load VCC=5V 3 6
Output High, VCC=15V 9 13
No Load VCC=5V 2 5

(Note 2)

IOL=50mA 0.4 0.75
IOL=100mA 2 2.5
IOL=200mA 2.5

IOL=8mA 0.3 0.4

IOL=-200mA 12.5

Min Typ Max Units

0.1 0.4 mA

(Note4)
astable

of Timing Interval astable 150 500
Supply Voltage Sensitivity of monostable
Timing Interval astable 0.3 1
Output Pulse Rise Time
Output Pulse Fall Time 100 300
Note 1: This parameter influences the maximum value of the timing resistors RAand RBin the circuit on Fig 1. For example, when

VCC=5V, the maximum value is R=RA+RB=3.4 MΩ, and VCC=15V, the maximum value is 10 MΩ.
Note 2: For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
Note 3: Timing interval error is defined as the difference between the measured value and the average value of a random sample from

each process run.
Note 4: Values specified are for a device in a monostable circuit similar to Fig. 2, with component values as follow: RA=2KΩto 100 KΩ,

C=0.1µF.
Note 5: Values specified are for a device in an astable circuit similar to Fig. 1, with component values as follow: RA, RB=1KΩto 100 KΩ,

TA=25°C

CL=15pF, TA=25°C

0.1 0.5 %/V

100 300 ns