MC14538BDG

Multivibrators Overview

The MC14538BDG is a dual precision retriggerable and resettable monostable multivibrator manufactured by onsemi. It operates within a supply voltage range of 3.0 Vdc to 18 Vdc and supports an operating temperature range from -55°C to +125°C. The device generates accurate output pulses with widths ranging from 10 μs to 10 s, determined by external timing components RX and CX using the formula T = RX • CX. It features latched trigger inputs allowing unlimited rise and fall times, and separate latched reset inputs. Propagation delay ranges from 100 ns to 600 ns depending on voltage. The component is housed in a SOIC-16 package.

Multivibrators Feature Summary

• Dual precision monostable multivibrator architecture with independent timing for two channels
• Retriggerable and resettable functionality allowing pulse width extension or immediate termination
• Flexible triggering from either positive edge (A input) or negative-going edge (B input)
• Latched trigger and reset inputs that accommodate unlimited rise and fall times

Multivibrators Applications

• Timing circuits requiring precise pulse generation
• Debouncing switches or contacts
• Pulse width modulation applications
• Frequency division circuits

Multivibrators Procurement Notes

Verify the specific ordering suffix 'DG' corresponds to the SOIC-16 package configuration as listed in the manufacturer's ordering information. Confirm compliance requirements such as RoHS status and Pb-Free designation during procurement. Ensure the application environment stays within the specified -55°C to +125°C operating temperature range to maintain performance specifications.

Multivibrators Selection Notes

Select this component when dual independent monostable timers are required in a single package. It is suitable for designs needing operation across a wide voltage range up to 18 V. Consider the MC54/74HC4538A if pulse widths less than 10 μs are needed with supplies up to 6 V. Verify compatibility with existing logic loads, as it can drive low-power TTL loads.

Multivibrators Part Context

The MC14538B belongs to the MC14 series of standard logic devices. It is pin-for-pin compatible with the MC14528B and CD4528B (CD4098). The 'D' suffix indicates the SOIC-16 package, while the 'G' suffix denotes a Pb-Free and RoHS compliant manufacturing process. This part is part of onsemi's broader portfolio of timing and logic solutions.

Multivibrators Replacement Considerations

MC14528B

Multivibrators FAQ

How is the output pulse width determined?

The output pulse width is determined by the external timing resistor (RX) and capacitor (CX) connected to the device, following the relationship T = RX • CX.

Can the device be triggered by both rising and falling edges?

Yes, the device can be triggered from the positive edge via the A input or the negative-going edge via the B input.