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CD4538

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Parameters

Technical/Catalog InformationCD4538BCM
VendorFairchild Semiconductor
CategoryIntegrated Circuits (ICs)
Logic TypeMonostable
Independent Circuits2
Voltage - Supply3 V ~ 15 V
Mounting TypeSurface Mount
Package / Case16-SOIC
PackagingTube
Operating Temperature-55°C ~ 125°C
Propagation Delay100ns
Current - Output High, Low8.8mA, 8.8mA
Schmitt Trigger InputNo
Drawing Number*
Lead Free StatusLead Free
RoHS StatusRoHS Compliant
Other Names CD4538BCM
CD4538BCM

Product Manufacturers Pack D/C
CD4538 - - -

Pinout/Connection Diagram

cd4538 Circuit
In this circuit, C1 is charged to a fixed reference level, then discharged. Integrator IC1 circuit charges C1 until IC1 has -6.2-V output, when comparator IC2 outputs a low. FET Q1, triggers one-section monostable multivibrator IC3, pulls pin 3 1ow for 470 μs, ensuring that Q1 completely discharges C1. The other section of IC3 produces a longer pulse of about 47 ms.

 Full scale of this circuit is 10 Hz. For lower output pulse rates, a counter circuit can be inserted between the sections of IC3. Notice that because C1 does not integrate while Q1 is biased on, this circuit has an error in the output period, which must be as short as possible. Therefore, the circuit's use is limited to low frequencies.

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PDF / Datasheet

CD4538BC PDF Download

CD4538BC

File Size: 141872 KB
Manufacturer: fairchild

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