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ILC556N
GENERAL PURPOSE DUAL TIMER
ILC556N is designed to be used: as high-precision pulse oscillator with adjustable frequency and on-off time ratio; for producing accurate time delays using external resistors and capacitors; as a timer in domestic appliances, in measuring equipment, computers; as functional units in electronic instruments. The timer may be used as oscillator producing accurate time delays and frequencies. In astable mode the pulse width of each circuit is controlled by one external resistor and capacitor. In monostable mode, when 14 used as oscillator, its own frequency of oscillation and on-off time 1 ratio are controlled by two external resistors and one capacitor. Unlike bipolar timer, CONTROL VOLTAGE output does not TA = -20 to 70 C require any capacitor decoupling. TRIGGER, RESET inputs are active as per low level. Output inverter provides sufficient drain and source currents to control TTL-loads, and provides minimum bias when controlling CMOS-loads. Input voltage levels are compatible with standard CMOS levels. Output voltage levels are compatible with input levels of CMOS ICs. Supply current: not more than 600 A. Supply voltage range: from 2.0 to 18V. Input current: 50, 100 pA at T=25 . Output current: 20 mA. Timing from microseconds to hours. Operates both in astable and monostable modes. Adjustable duty cycle. Temperature stability: 0.06%/. Latch current not less than 100 mA at T=70 . Allowed static potential value: not less than 2000V (HBM) and not less than 200 V (). Pin Configuration
DISCHARGE1
* * * * * * * * * * *
01
14 13 12
VCC DISCHARGE2 THRESHOLD2 CONTROL VOLTAGE2 RESET2 OUTPUT2 TRIGGER2
THRESHOLD1 02 CONTROL 03 VOLTAGE1 RESET1 OUTPUT1 TRIGGER1 GND 04 05 06 07
ILC556N
11 10 09 08
1
ILC556N
Truth Table THRESHOLD X > 2/3 VCC < 2/3 VCC X
TRIGGER X > 1/3 VCC > 1/3 VCC < 1/3 VCC RESET L H H H
OUTPUT L L STABLE H
DISCHARGE ON ON STABLE OFF
Maximum ratings and recommended operating conditions Parameter, unit Symbol Recommended operating conditions Typical Min Max Supply voltage, V VCC 2.0 18.0 Output current, mA IO 20 Input voltage, V VTH, VTRIG, VRST Power dissipation, mW PD -20 70 TOPR Operating temperature, TSTG Storage temperature, TSOLDER Lead solder temperature, (10 sec max)
Maximum ratings Typical Min 0 -0.3 -20 -65 Max 18.0 100 VCC+0.3 300 85 150 260
2
ILC556N
AC characteristics Parameter Threshold voltage, VCC Trigger voltage, VCC Reset voltage, V Symbol VTH VTRIG Condition IOL, IOH VCC, V 5.0 5.0 2.0 18.0 2.0 18.0 Min 0.65 0.60 0.31 0.28 0.4 0.2 0.65 0.60 IOL = 3.2 IOL = 20 IOL = 3.2 IOL = 20 IOH = -0.8 5.0 15.0 5.0 15.0 5.0 15.0 5.0 15.0 2.0 18.0 2.0 18.0 Typical Max 0.70 0.80 0.36 0.40 1.0 1.5 0.69 0.80 0.4 1.0 0.6 1.5 Temperature, 2510 -20, 70 2510 -20, 70 2510 -20, 70 2510 -20, 70 2510 -20, 70 2510 -20, 70 400 600 800 1000 2510 -20, 70
VRST VCV VOL
Control voltage, VCC Output voltage, LOW, V
Output voltage, HIGH, V
VOH
4.0 14.3 3.5 14.0
Supply current ,
ICC
3
ILC556N
DC characteristics Parameter Symbol RL, CL Clock rise and fall time, ns Maximum oscillation frequency, kHz Initial frequency, % Oscillation frequency temperature ratio, %/ Oscillation frequency instability, %/V tTHL, tTLH fMAX RL = 10 hm, CL = 10 pF Monostable mode Condition VCC, V 5.0 2.018.0 5.0 10.0 15.0 5.0 Block diagram
Vcc R ComparatorA threshold control voltage + DISCHARGE R OUTPUT RESET Trigger
Typical Min 500 200 5 Max 75 150
Tempera ture 2510 -20, 70 2510 -20, 70 -20, 70
f
RL = 1 - 100 khm, CL = 0.1 F
0.02 0.03 0.06 3 6
f
2510 -20, 70
+ TRIGGER R Comparator B
Time diagram
VCC 0.9 TRIGGER tHL 0.9 OUTPUT 0.1 tTLH tTHL 0.1 GND 0.1 GND VCC 0.9
4

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