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Part: SA556
Category:
Analog & Mixed-Signal Processing
Description: NE/SA556; Dual Timer
Company: Philips Semiconductors
Datasheet: Download SA556 datasheet File size : 70 kB
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Datasheet text preview:
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
ˇ Timing from microseconds to hours ˇ Replaces two 555 timers ˇ Operates in both astable and monostable modes ˇ High output current ˇ Adjustable duty cycle ˇ TTL compatible ˇ Temperature stability of 0.005%/°C
APPLICATIONS
SL00355
Figure 1. Pin Configuration
ˇ Precision timing ˇ Sequential timing ˇ Pulse shaping ˇ Pulse generator ˇ Missing pulse detector ˇ Tone burst generator ˇ Pulse width modulation ˇ Time delay generator ˇ Frequency division ˇ Touch-ToneŽ encoder ˇ Industrial controls ˇ Pulse position modulation ˇ Appliance timing ˇ 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 +70°C 0 to +70°C 40°C to +85°C ORDER CODE NE556D NE556N SA556N DWG # SOT108-1 SOT27-1 SOT27-1
ŽTouch-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
Others parts begin by sa
SA-1 SA-2 SA-3 SA-4 SA-5 SA-6 SA-7 SA-8 SA-9 SA-10 SA-11 SA-12 SA-13 SA-14 SA-15 SA-16 SA-17 SA-18 SA-19 SA-20 SA-21 SA-22 SA-23 SA-24 SA-25 SA-26 SA-27 SA-28 SA-29 SA-30
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