NA555

更新时间： 2024-11-18 03:47:07

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德州仪器 - TI		/
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PRECISION TIMERS

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NA555 数据手册

NA555, NE555, SA555, SE555

PRECISION TIMERS

www.ti.com

SLFS022F–SEPTEMBER 1973–REVISED JUNE 2006

FEATURES

•

Timing From Microseconds to Hours

Astable or Monostable Operation

•

Adjustable Duty Cycle

TTL-Compatible Output Can Sink or Source

up to 200 mA

DESCRIPTION/ORDERING INFORMATION

These devices are precision timing circuits capable of producing accurate time delays or oscillation. In the

time-delay or monostable mode of operation, the timed interval is controlled by a single external resistor and

capacitor network. In the astable mode of operation, the frequency and duty cycle can be controlled

independently with two external resistors and a single external capacitor.

The threshold and trigger levels normally are two-thirds and one-third, respectively, of V_CC. These levels can be

altered by use of the control-voltage terminal. When the trigger input falls below the trigger level, the flip-flop is

set, and the output goes high. If the trigger input is above the trigger level and the threshold input is above the

threshold level, the flip-flop is reset and the output is low. The reset (RESET) input can override all other inputs

and can be used to initiate a new timing cycle. When RESET goes low, the flip-flop is reset, and the output goes

low. When the output is low, a low-impedance path is provided between discharge (DISCH) and ground.

The output circuit is capable of sinking or sourcing current up to 200 mA. Operation is specified for supplies of

5 V to 15 V. With a 5-V supply, output levels are compatible with TTL inputs.

NA555...D OR P PACKAGE

SE555...FK PACKAGE

NE555...D, P, PS, OR PW PACKAGE

(TOP VIEW)

SA555...D OR P PACKAGE

SE555...D, JG, OR P PACKAGE

(TOP VIEW)

1 20 19

GND

TRIG

OUT

V_CC

TRIG

OUT

DISCH

THRES

CONT

DISCH

THRES

RESET

9 10 11 12 13

NC – No internal connection

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

On products compliant to MIL-PRF-38535, all parameters are

Instruments standard warranty. Production processing does not

tested unless otherwise noted. On all other products, production

necessarily include testing of all parameters.

processing does not necessarily include testing of all parameters.

12 3 4 5 6 7...24

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NA555 替代型号

型号	品牌	替代类型	描述	数据表
SA555	TI	功能相似	PRECISION TIMERS

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NA555_07	TI	获取价格	PRECISION TIMERS
NA555_08	TI	获取价格	PRECISION TIMERS
NA555_10	TI	获取价格	PRCISION TIMERS
NA555_14	TI	获取价格	Precision Timers
NA555_16	TI	获取价格	xx555 Precision Timers
NA555D	TI	获取价格	PRECISION TIMERS
NA555DG4	TI	获取价格	PRECISION TIMERS
NA555DR	TI	获取价格	PRECISION TIMERS
NA555DRG4	TI	获取价格	PRECISION TIMERS
NA555P	TI	获取价格	PRECISION TIMERS

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