MC14538BDWG

Multivibrators Overview

The MC14538BDWG 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. The package is SOIC-16 Wide Body (DW suffix).

Multivibrators Feature Summary

• Dual precision monostable multivibrator architecture with independent A and B trigger inputs for positive or negative edge triggering.
• Retriggerable functionality allows pulse lengthening when valid triggers occur before the output returns to the quiescent state.
• Separate latched reset input enables immediate termination of the output pulse generation cycle.
• Capable of driving two low-power TTL loads or one low-power Schottky TTL load across the rated temperature range.

Multivibrators Applications

• Pulse width modulation circuits requiring precise timing control via external RC networks.
• Debouncing switches or contacts to generate clean digital pulses from noisy mechanical inputs.
• Frequency division applications utilizing the retriggerable nature of the monostable stages.

Multivibrators Procurement Notes

Verify the specific ordering suffix 'DW' corresponds to the SOIC-16 Wide Body package configuration required for your PCB layout. Confirm that the NLV prefix is not required if automotive qualification or unique site control changes are necessary for your production environment. Ensure compatibility with RoHS compliance standards applicable to your region.

Multivibrators Selection Notes

Select this component when dual independent monostable timers are needed in a single package. Consider the MC54/74HC4538A if operation below 10 μs pulse widths with supplies up to 6 V is required. Verify that external timing components RX and CX values align with the leakage constraints and capacitance limits specified in the datasheet for stable operation.

Multivibrators Part Context

This device belongs to the MC14538B series of CMOS logic integrated circuits. It is pin-for-pin compatible with the MC14528B and CD4528B (CD4098), facilitating direct replacement in existing designs. The part is part of the broader 4000 series logic family, offering high noise immunity and wide supply voltage flexibility typical of CMOS technology.

Multivibrators Replacement Considerations

The MC14538B and CD4528B (CD4098) are confirmed pin-compatible substitutes. Designers should verify that any replacement maintains the same package type and electrical characteristics, particularly regarding propagation delay and output drive current capabilities under the specific operating conditions.