NE555P

Precision Timer

The NE555P is a precision timer from Texas Instruments. View the full NE555P datasheet below including key specifications, electrical characteristics, absolute maximum ratings.

Manufacturer

Texas Instruments

Key Specifications

Parameter	Value
Quiescent Current	10 mA
Frequency	100kHz
Mounting Type	Through Hole
Operating Temperature	0°C ~ 70°C
Package / Case	8-DIP (0.300", 7.62mm)
Supplier Device Package	8-PDIP
Supplier Device Package	8-PDIP
Supplier Device Package	8-PDIP
Supplier Device Package	8-PDIP
Supplier Device Package	8-PDIP
Supplier Device Package	8-PDIP
Supplier Device Package	8-PDIP
Supplier Device Package	8-PDIP
Type	555 Type, Timer/Oscillator (Single)
Type	555 Type, Timer/Oscillator (Single)
Type	555 Type, Timer/Oscillator (Single)
Type	555 Type, Timer/Oscillator (Single)
Type	555 Type, Timer/Oscillator (Single)
Type	555 Type, Timer/Oscillator (Single)
Type	555 Type, Timer/Oscillator (Single)
Type	555 Type, Timer/Oscillator (Single)
Supply Voltage	4.5V ~ 16V

Overview

Part: xx555 Precision Timers (NA555, NE555, SA555, SE555 variants)

Type: Precision Timer

Description: Precision timing circuits capable of producing accurate time delays or oscillation, supporting astable or monostable operation with an adjustable duty cycle, and a TTL-compatible output that can sink or source up to 200mA.

Operating Conditions:

Supply voltage: NA555, NE555, SA555: 4.5–16 V; SE555: 4.5–18 V
Operating temperature: NA555: -40 to 105 °C; NE555: 0 to 70 °C; SA555: -40 to 85 °C; SE555: -55 to 125 °C
Max output current: ±200 mA

Absolute Maximum Ratings:

Max supply voltage: 18 V
Max continuous current: ±225 mA
Max junction/storage temperature: 150 °C

Key Specs:

THRES voltage level (VCC=15V): Typ 10 V
TRIG voltage level (VCC=15V): Typ 5 V
Output low voltage (VCC=15V, IOL=10mA): Typ 0.1 V
Output low voltage (VCC=15V, IOL=100mA): Typ 2 V
Output high voltage (VCC=15V, IOH=-100mA): Typ 13.3 V
Supply current (Output low, no load, VCC=15V): Typ 10 mA
Output-pulse rise time (CL=15pF, TA=25°C): Typ 100 ns
Output-pulse fall time (CL=15pF, TA=25°C): Typ 100 ns

Features:

Timing from microseconds to hours
Astable or monostable operation
Adjustable duty cycle
TTL-compatible output can sink or source up to 200mA

Applications:

Pulse-shaping circuits
Missing-pulse detectors
Pulse-width modulators
Pulse-position modulators
Sequential timers
Pulse generators
Frequency dividers
Industrial controls

Package:

D (SOIC, 8)
P (PDIP, 8)
PS (SO, 8)
PW (TSSOP, 8)
FK (LCCC, 20)
JG (CDIP, 8)

Features

Timing from microseconds to hours
Astable or monostable operation
Adjustable duty cycle
TTL-compatible output can sink or source up to 200mA
On products compliant to MIL-PRF-38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters.

Applications

Pulse-shaping circuits
Missing-pulse detectors
Pulse-width modulators
Pulse-position modulators
Sequential timers
Pulse generators
Frequency dividers
Industrial controls

Simplified Schematic

Pin Configuration

NC - No internal connection

Table 4-1. Pin Functions

PIN	PIN	PIN
NAME	NO.	NO.
NAME	D (SOIC), P (PDIP), PS (SO), PW (TSSOP), JG (CDIP)	FK (LCCC)
CONT	5	12
DISCH	7	17
GND	1	2
NC	-	1, 3, 4, 6, 8, 9, 11, 13, 14, 16, 18, 19
OUT	3	7
RESET	4	10
THRES	6	15
TRIG	2	5
V CC	8	20

Electrical Characteristics

at V CC = 5V to 15V and TA = 25°C (unless otherwise noted)

PARAMETER	TEST CONDITIONS	TEST CONDITIONS	MIN	TYP	MAX	UNIT
THRES voltage level	V CC = 15V	NA555, NE555, SA555	8.8	10	11.2	V
THRES voltage level		SE555	9.4	10	10.6	V
THRES voltage level	V CC = 5V	NA555, NE555, SA555	2.4	3.3	4.2	V
THRES voltage level		SE555	2.7	3.3	4	V
THRES current (1)				30	250	nA
TRIG voltage level	V CC = 15V	NA555, NE555, SA555	4.5	5	5.6	V
TRIG voltage level		SE555	4.8	5	5.2	V
TRIG voltage level	V CC = 15V, T A = -55°C to +125°C	SE555	3		6	V
TRIG voltage level	V CC = 5V	NA555, NE555, SA555	1.1	1.67	2.2	V
TRIG voltage level		SE555	1.45	1.67	1.9	V
TRIG voltage level	V CC = 5V, T A = -55°C to +125°C	SE555			1.9	V
TRIG current	TRIG at 0V	NA555, NE555, SA555		0.5	2	μA
TRIG current		SE555		0.5	0.9	μA
RESET voltage level			0.3	0.7	1	V
RESET voltage level	T A = -55°C to +125°C	SE555			1.1	V
RESET current	RESET at V CC	RESET at V CC		0.1	0.4	mA
RESET current	RESET at 0V	NA555, NE555, SA555		-0.4	-1.5	mA
RESET current		SE555		-0.4	-1	mA
DISCH switch off-state current				20	100	nA
DISCH switch on-state voltage	V CC = 5V, I O = 8mA	NA555, NE555, SA555		0.15	0.4	V

Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted) (1)

			MIN	MAX	UNIT
V CC	Supply voltage (2)	Supply voltage (2)		18	V
V I	Input voltage	CONT, RESET, THRES, TRIG		V CC	V
I O	Output current	Output current		±225	mA
T J	Operating virtual junction temperature	Operating virtual junction temperature		150	°C
	Case temperature for 60 seconds	FK package		260	°C
	Lead temperature 1.6mm (1/16 inch) from case	JG package, 60 seconds		300	°C
T stg	Storage temperature	Storage temperature	-65	150	°C

Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)

			MIN	MAX	UNIT
V CC	Supply voltage	NA555, NE555, SA555	4.5	16	V
V CC		SE555	4.5	18	V
I O	Output current	Output current		±200	mA
T A	Operating free-air temperature	NA555	-40	105	°C
T A	Operating free-air temperature	NE555	0	70	°C
T A	Operating free-air temperature	SA555	-40	85	°C
T A	Operating free-air temperature	SE555	-55	125	°C

Thermal Information

THERMAL METRIC	(1)	NA556, NE556, SA555, SE555	SE555	SE555	NA555, NE555	NE555	NE555	UNIT
		D (SOIC)	FK (LCCC)	JG (CDIP)	P (PDIP)	PS (SO)	PW (TSSOP)	UNIT
		8 PINS	20 PINS	8 PINS	8 PINS	8 PINS	8 PINS
R θJA	Junction-to-ambient thermal resistance	125.4	92.2	125.0	98.5	124.5	164.2	°C/W
R θJC(top)	Junction-to-case (top) thermal resistance	64.9	67.6	73.3	77.8	61.2	70.5	°C/W
R θJB	Junction-to-board thermal resistance	73.2	66.7	114.9	61.0	79.3	104.8	°C/W
ψ JT	Junction-to-top characterization parameter	14.3	61.6	44.4	43.9	16.5	8.2	°C/W
ψ JB	Junction-to-board characterization parameter	72.1	66.5	106.6	60.3	77.8	103.1	°C/W
R θJC(bot)	Junction-to-case (bottom) thermal resistance	N/A	14.2	29.3	N/A	N/A	N/A	°C/W

Typical Application

The Nx555 and Sx555 precision timers use resistor and capacitor charging delay to provide a programmable time delay or operating frequency. This section presents a simplified discussion of the design process.

Related Variants

The following components are covered by the same datasheet.

Part Number	Manufacturer	Package
NE555	Diodes Incorporated	D (SOIC, 8)

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