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Details, datasheet, quote on part number:96LS02
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| Part: | 96LS02 |
| Category: | Logic => Multivibrators/Oscillators => Bipolar->TTL Family |
| Description: | Dual Retriggerable Resettable Monostable Multivibrator |
| Company: | Fairchild Semiconductor |
| Datasheet: | Download 96LS02 datasheet File size : 105 kB |
| Request For quote: | Find where to buy 96LS02
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Datasheet text preview:
DM96LS02 Dual Retriggerable Resettable Monostable Multivibrator
October 1988 Revised March 2000
DM96LS02 Dual Retriggerable Resettable Monostable Multivibrator
General Description
The DM96LS02 is a dual retriggerable and resettable monostable multivibrator. The one-shot provides exceptionally wide delay range, pulse width stability, predictable accuracy and immunity to noise. The pulse width is set by an external resistor and capacitor. Resistor values up to 1.0 M reduce required capacitor values. Hysteresis is provided on both trigger inputs of the DM96LS02 for increased noise immunity.
Features
s Required timing capacitance reduced by factors of 10 to 100 over conventional designs s Broad timing resistor range--1.0 k to 2.0 M s Output Pulse Width is variable over a 2000:1 range by resistor control s Propagation delay of 35 ns s 0.3V hysteresis on trigger inputs s Output pulse width independent of duty cycle s 35 ns to output pulse width range
Ordering Code:
Order Number DM96LS02M DM96LS02N Package Number M16A N16E Package Description 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering code.
Logic Symbol
Connection Diagram
VCC = Pin 16 GND = Pin 8
Pin Descriptions
Pin Names I0 I0 I1 CD Q Q Description Trigger Input (Active Falling Edge) Schmitt Trigger Input (Active Falling Edge) Schmitt Trigger Input (Active Rising Edge) Direct Clear Input (Active LOW) True Pulse Output Complementary Pulse Output
© 2000 Fairchild Semiconductor Corporation
DS009816
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Functional Description
The DM96LS02 dual retriggerable resettable monostable multivibrator has two DC coupled trigger inputs per function, one active LOW (I0) and one active HIGH (I1). The I1 input and I0 input of the DM96LS02 utilize an internal Schmitt trigger with hysteresis of 0.3V to provide increased noise immunity. The use of active HIGH and LOW inputs allows either rising or falling edge triggering and optional non-retriggerable operation. The inputs are DC coupled making triggering independent of input transition times. When input conditions for triggering are met, the Q output goes HIGH and the external capacitor is rapidly discharged and then allowed to recharge. An input trigger which occurs during the timing cycle will retrigger the circuit and result in Q remaining HIGH. The output pulse may be terminated (Q to the LOW state) at any time by setting the Direct Clear input LOW. Retriggering may be inhibited by tying the Q output to I0 or the Q output to I1. Differential sensing techniques are used to obtain excellent stability over temperature and power supply variations and a feedback Darlington capacitor discharge circuit minimizes pulse width variation from unit to unit. Schottky TTL output stages provide high switching speeds and output compatibility with all TTL logic families.
Logic Diagram
Operation Notes
TIMING 1. An external resistor (RX) and an external capacitor (CX) are required as shown in the Logic Diagram. The value of RX may vary from 1.0 k to 1.0 M. 2. The value of CX may vary from 0 to any necessary value available. If, however, the capacitor has significant leakage relative to VCC/RX the timing equations may not represent the pulse width obtained. 3. The output pulse width tW for RX 10 k and CX 1000 pF is determined as follows: tW = 0.43 RXCX Where RX is in k, CX is in pF, t is in ns or RX is in k, CX is in µF, t is in ms. 4. The output pulse width for RX < 10 k or CX < 1000 pF should be determined from pulse width versus CX or RX graphs. 5. To obtain variable pulse width by remote trimming, the following circuit is recommended: TRIGGERING 1. The minimum negative pulse width into I0 is 8.0 ns; the minimum positive pulse width into I1 is 12 ns. 2. Input signals to the DM96LS02 exhibiting slow or noisy transitions can use either trigger as both are Schmitt triggers. 3. When non-retriggerable operation is required, i.e., when input triggers are to be ignored during quasi-stable state, input latching is used to inhibit retriggering. 4. An overriding active LOW level direct clear is provided on each multivibrator. By applying a LOW to the clear, any timing cycle can be terminated or any new cycle inhibited until the LOW reset input is removed. Trigger inputs will not produce spikes in the output when the reset is held LOW. A LOW-to-HIGH transition on CD will not trigger the DM96LS02. If the CD input goes HIGH coincident with a trigger transition, the circuit will respond to the trigger.
6. Under any operating condition, CX and RX (Min) must be kept as close to the circuit as possible to minimize stray capacitance and reduce noise pickup. 7. VCC and ground wiring should conform to good high frequency standards so that switching transients on VCC and ground leads do not cause interaction between one shots. Use of a 0.01 µF to 0.1 µF bypass capacitor between VCC and ground located near the circuit is recommended.
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DM96LS02
Operation Notes (continued)
Triggering Truth Table
Pin Numbers 5(11) HL H X 4(12) L LH X 3(13) H H L Operation Trigger Trigger Reset
H = HIGH Voltage Level V IH L = LOW Voltage Level VIL X = Immaterial (either H or L) HL = HIGH-to-LOW Voltage Level Transition L H = LOW-to-HIGH Voltage Level Transition
Typical Performance Characteristics
Output tW vs. RX and CX I1 Delay Time vs. TA
I0 Delay Time vs. TA
Output tW vs. TA
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Typical Performance Characteristics (continued) Normalized tW vs. TA Pulse Width vs. RX CX
Input Pulse f 100 kHz Amp 3.0V W idth 100 ns tr = tf 5 ns
FIGURE 1.
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DM96LS02
Absolute Maximum Ratings(Note 1)
Supply Voltage Input Voltage Operating Free Air Temperature Range Storage Temperature Range 7V 7V 0°C to +70°C -65°C to +150°C
Note 1: The "Absolute Maximum Ratings" are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The "Recommended Operating Conditions" table will define the conditions for actual device operation.
Recommended Operating Conditions
Symbol VC C V IH V IL IOH IOL TA Supply Voltage HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Current LOW Level Output Current Free Air Operating Temperature 0 Parameter Min 4.75 2 0.8 -0.4 8 70 Nom 5 Max 5.25 Units V V V mA mA °C
Electrical Characteristics
Over recommended operating free air temperature range (unless otherwise noted) Symbol VI VOH VOL Parameter Input Clamp Voltage HIGH Level Output Voltage LOW Level Output Voltage II IIH IIL IOS ICC VT+ VT- Input Current @ Max Input Voltage HIGH Level Input Current LOW Level Input Current Short Circuit Output Current Supply Current Positive-Going Threshold Voltage, I0, I1 Negative-Going Threshold Voltage, I0, I1
Note 2: All typicals are at VCC = 5V, TA = 25°C. Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Conditions VCC = Min, II = -18 mA VCC = Min, IOH = Max, VIL = Max VCC = Min, IOL = Max, VIH = Min IOL = 4 mA, VCC = Min VCC = Max, VI = 7V VI = 10V VCC = Max, VI = 2.7V VCC = Max, VI = 0.4V VCC = Max (Note 3) VCC = Max
M in
Typ (Note 2)
Max - 1.5
Units V V
2.7
3.4 0.35 0.25 0.5 0 .4 0.1 20 - 0.4
V
mA µA mA mA mA V V
-20
-100 36 2.0
0.8
5
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