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INTEGRATED CIRCUITS
NE/SA556 Dual timer
Product data Replaces NE/SA/SE556/NE556-1 of 1994 Aug 31 IC11 2001 Aug 03
Philips Semiconductors
Philips Semiconductors
Product data
Dual timer
NE/SA556
DESCRIPTION
Both the NE556 and SA556 Dual Monolithic timing circuits are highly stable controllers capable of producing accurate time delays or oscillation. The 556 is 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 200 mA.
PIN CONFIGURATION
D, N Packages
DISCHARGE THRESHOLD CONTROL VOLTAGE RESET OUTPUT TRIGGER GND 1 2 3 4 5 6 7 14 13 12 11 10 9 8 VCC DISCHARGE THRESHOLD CONTROL VOLTAGE RESET OUTPUT TRIGGER
FEATURES
* 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
APPLICATIONS
SL00355
Figure 1. Pin Configuration
* Precision timing * Sequential timing * Pulse shaping * Pulse generator * Missing pulse detector * Tone burst generator * Pulse width modulation * Time delay generator * Frequency division * Touch-Tone(R) encoder * Industrial controls * Pulse position modulation * Appliance timing * Traffic light control
ORDERING INFORMATION
DESCRIPTION 14-Pin Plastic Small Outline (SO) Package 14-Pin Plastic Dual In-Line Package (DIP) 14-Pin Plastic Dual In-Line Package (DIP) TEMPERATURE RANGE 0 to +70C 0 to +70C -40C to +85C ORDER CODE NE556D NE556N SA556N DWG # SOT108-1 SOT27-1 SOT27-1
(R)Touch-Tone
is a registered trademark of AT&T.
2 853-0035 13721
2001 Aug 03
Philips Semiconductors
Product data
Dual timer
NE/SA556
BLOCK DIAGRAM
1 DISCHARGE 2 COMP CONTROL VOLTAGE RESET 3 4 COMP 11 10 RESET CONTROL VOLTAGE 14 13 VCC DISCHARGE
THRESHOLD
12 THRESHOLD
FLIP FLOP
FLIP FLOP
OUTPUT
5
9
OUTPUT
TRIGGER
6
COMP
COMP
8 TRIGGER
GROUND
7
SP00356
Figure 2. Block Diagram
EQUIVALENT SCHEMATIC (Shown for one circuit only)
CONTROL VOLTAGE VCC R1 4.7K R2 330 R3 4.7K R4 1K R7 5K R12 6.8K
Q5
Q6 Q7 Q8
Q9 Q19
Q21 Q22 R13 3.3K
THRESHOLD
Q1 Q2 Q3
Q4
R10 3.2K OUTPUT Q23 C B CB Q18 E R11 4.7K Q17 Q16
R5 10K TRIGGER Q10 Q25
Q11 Q12 Q13
R8 5K
Q20 R14 220 Q24
RESET DISCHARGE GND Q14
Q15 R6 100K R16 100 R9 5K R15 4.7K
SP00357
Figure 3. Equivalent Schematic
2001 Aug 03
3
Philips Semiconductors
Product data
Dual timer
NE/SA556
ABSOLUTE MAXIMUM RATINGS
SYMBOL VCC PD Tamb Tstg TSOLD Supply voltage Maximum allowable power dissipation1 Operating temperature range NE556 SA556 Storage temperature range Lead soldering temperature (10 sec max) PARAMETER RATING +16 800 0 to +70 -40 to +85 -65 to +150 +230 UNIT V mW C C C C
NOTE: 1. The junction temperature must be kept below 125 C for the D package and below 150 C for the N package. 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
2001 Aug 03
4
Philips Semiconductors
Product data
Dual timer
NE/SA556
ELECTRICAL CHARACTERISTICS
Tamb = 25 C, VCC = +5 V to +15 V, unless otherwise specified. SYMBOL VCC ICC PARAMETER Supply voltage Su ly Supply current (low state)1 Timing error (monostable) Initial accuracy2 Drift with temperature Drift with supply voltage Timing error (astable) Initial accuracy2 Drift with temperature Drift with supply voltage Control voltage level Threshold voltage Threshold current3 Trigger voltage Trigger current Reset voltage5 VRESET = 0.4 V VRESET = 0 V VCC = 15 V ISINK = 10 mA ISINK = 50 mA ISINK = 100 mA ISINK = 200 mA VCC = 5 V ISINK = 8 mA ISINK = 5 mA VCC = 15 V ISOURCE = 200 mA ISOURCE = 100 mA VCC = 5 V ISOURCE = 100 mA tR tF Rise time of output Fall time of output Discharge leakage current Matching characteristics4 Initial accuracy2 Drift with temperature Drift with supply voltage Reset current IRESET Reset current VCC = 5 V, RL = VCC = 15 V, RL = RA = 2k to 100 k C = 0.1 F T = 1.1 RC RA, RB = 1 k to 100 k C = 0. F VCC = 15 V VCC = 15 V VCC = 5 V VCC = 15 V VCC = 5 V VCC = 15 V, VTH = 10.5 V VCC = 15 V VCC = 5 V VTRIG = 0 V 0.4 0.4 4.5 1.1 9.0 2.6 8.8 2.4 TEST CONDITIONS Min 4.5 6 20 0.75 50 0.1 5 400 0.3 10.0 3.33 10.0 3.33 30 5.0 1.67 0.5 0.7 0.1 0.4 0.1 0.4 2.0 2.5 0.25 0.15 12.5 13.3 3.3 100 100 20 1.0 10 0.2 300 300 100 2.0 0.5 ns ns nA % ppm/C %/V Typ Max 16 12 30 3.0 150 0.5 13 500 1 11.0 4.0 11.2 4.2 250 5.6 2.2 2.0 1.0 0.6 1.5 0.25 0.75 3.2 UNIT V mA mA % ppm/C %/V % ppm/C %/V V V V nA V V A V mA mA
tM tM/T tM/VS tA tA/T tA/VS VC VTH ITH VTRIG ITRIG VRESET
V
VO OL
Output voltage (low)
0.3 0.25
V
VOH
Output voltage ( g ) g (high)
12.75 2.75
V
NOTES: 1. Supply current when output is high is typically 1.0 mA less. 2. Tested at VCC = 5 V and VCC = 15 V. 3. This will determine maximum value of RA+RB. For 15 V operation, the max total R = 10 M, and for 5 V operation, the maximum total R = 3.4 M. 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 0.4 V. To disable reset function, the voltage at reset pin has to be greater than 1 V. 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.
2001 Aug 03
5
Philips Semiconductors
Product data
Dual timer
NE/SA556
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 0.001 F 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.
VCC
VCC
VCC
VCC
VCC
R1 10 k 1 M 4 1 10 14 12 13 2 0.001 INPUT C1 1 F 6 7 11 0.01 3 0.01 556 8
R2 130 k 10 k
C2 50 F
0.001 5 9 OUTPUT 1 OUTPUT 2
SP00358
Figure 4. Sequential Timer
2001 Aug 03
6
Philips Semiconductors
Product data
Dual timer
NE/SA556
TYPICAL PERFORMANCE CHARACTERISTICS
Minimum Pulse Width Required for Triggering
150 MINIMUM PULSE WIDTH (ns) SUPPLY CURRENT -- mA 125 100 75 50 25 +125oC 0 0 0.1 0.2 0.3 0.4(XVCC) 0 5.0 10.0 SUPPLY VOLTAGE -- VOLTS 15.0 -55oC 0oC 10.0 +125oC VCC V OUT -- VOLTS 8.0 +25oC 6.0 55oC 4.0
Supply Current VS Supply Voltage
2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 1.0
High Output Voltage Drop vs Output Source Current
55oC +25oC +125oC
+25oC +70oC
2.0
5V = VCC = 15V 2.0 5.0 10 20 50 100
LOWEST VOLTAGE LEVEL OF TRIGGER PULSE
ISOURCE -- mA
Low Output Voltage vs Output Sink Current
10
VCC = 5V 10
Low Output Voltage vs Output Sink Current
10 VCC = 10V -55oC VOUT -- VOLTS VOUT --VOLTS
Low Output Voltae vs Output Sink Current
VCC = 15V
V -- VOLTS OUT
1.0
55oC
1.0
+25oC +125oC
1.0
+25oC
+25oC 0.1 +125oC -55oC
0.1
+125oC
0.1
0.01 1.0
0.01
2.0
5.0
10
20
50 100
1.0
2.0
5.0
10
20
50
100
0.01 1.0
2.0
5.0
10
20
50 100
ISINK -- mA
ISINK -- mA
ISINK -- mA
Delay Time vs Temperature
1.015 NORMALIZED DELAY TIME 1.010 1.005 1.000 0.995 0.990 0.985 -50 25 0 +25 +50 +75 +100 +125 TEMPERATURE -- oC 1.015 1.010 1.005 1.000 0.995 0.990 0.985 0
Delay Time vs Supply Voltage
Propagation Delay vs Voltage Level of Trigger Pulse
300 250 -55oC PROPAGATION -- ns 200 0oC 150 100
NORMALIZED DELAY TIME
+25oC +70oC +125oC
50 0 5 10 15 20 0
0.1
0.2
0.3
0.4
SUPPLY VOLTAGE -- V
LOWEST VOLTAGE LEVEL OF TRIGGER PULSE -- XVCC
SP00359
Figure 5. Typical Performance Characteristics
2001 Aug 03
7
Philips Semiconductors
Product data
Dual timer
NE/SA556
SO14: plastic small outline package; 14 leads; body width 3.9 mm
SOT108-1
2001 Aug 03
8
Philips Semiconductors
Product data
Dual timer
NE/SA556
DIP14: plastic dual in-line package; 14 leads (300 mil)
SOT27-1
2001 Aug 03
9
Philips Semiconductors
Product data
Dual timer
NE/SA556
Data sheet status
Data sheet status [1] Objective data Preliminary data Product status [2] Development Qualification Definitions This data sheet contains data from the objective specification for product development. Philips Semiconductors reserves the right to change the specification in any manner without notice. This data sheet contains data from the preliminary specification. Supplementary data will be published at a later date. Philips Semiconductors reserves the right to change the specification without notice, in order to improve the design and supply the best possible product. This data sheet contains data from the product specification. Philips Semiconductors reserves the right to make changes at any time in order to improve the design, manufacturing and supply. Changes will be communicated according to the Customer Product/Process Change Notification (CPCN) procedure SNW-SQ-650A.
Product data
Production
[1] Please consult the most recently issued data sheet before initiating or completing a design. [2] The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at URL http://www.semiconductors.philips.com.
Definitions
Short-form specification -- The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Limiting values definition -- Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information -- Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification.
Disclaimers
Life support -- These products are not designed for use in life support appliances, devices or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Right to make changes -- Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified.
Contact information
For additional information please visit http://www.semiconductors.philips.com. Fax: +31 40 27 24825
(c) Koninklijke Philips Electronics N.V. 2001 All rights reserved. Printed in U.S.A. Date of release: 10-01
For sales offices addresses send e-mail to: sales.addresses@www.semiconductors.philips.com.
Document order number:
9397 750 08928
Philips Semiconductors
2001 Aug 03 10

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