MC14538BDTR2G

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The MC14538BDTR2G is a bilateral phase-shift oscillator comprised of two independent, high-performance, frequency discriminators and two manually adjustable pulse-width modulators. The part is widely known as a logic-level multivibrator or dual-edge triggered flip-flop, used for time-delayed or exponential waveform generation, edge detection or pulse detection applications.

The device is based on two separate, self-oscillating latch (SOL) circuits, each capable of generating a triangular wave from low-voltage (down to 0.35V) stator pulses. The circuit provides a 2X frequency multiplication effect to the input pulses, and the resulting waveform has a duty cycle of 50%. The duty cycle of the output can be manipulated using the manual modulation control pins. Other features include hysteresis level controls, rise and fall time controls, and a low-frequency propagation delay.

The MC14538BDTR2G is primarily targeted for use in devices requiring timer and sequencing functions, including modems, test and measurement equipment, data acquisition systems, digital communication systems, robotics, and automotive electronics. Multivibrator circuits employing the device can be used as snap-shot circuits, phase-shifters, and clock generators to drive two-phase clocks, etc.

The MC14538BDTR2G consists of two complete, self-timed, edge-triggered flip-flops. The inputs of each flip-flop are referred to as A and B. The inputs have active high or active low modes. When the A or B input is low, the output is high. When the A or B input is high, the output is low. The A and B inputs are connected to a single pin for each flip-flop, thus allowing the selection of either recirculating or single-shot operation from either pin.

The outputs of each flip-flop can be configured either as a single-shot pulse or as a bistable latch. When the pulse-width switch is selected, the output will agree with the input after a timeout. When the latch switch is selected, the output will remain in the same state regardless of the inputs. The recirculating and single-shot modes can be disabled with the single-shot enable pin.

The MC14538BDTR2G can also be used as a timer in pulse interval applications. In this mode, a single-ended pulse is applied to the A or B input. This results in a pulse output of the same shape and duration as the input pulse, with a programmed delay which is adjustable via an external capacitor. A reset pin can also be used to reset the pulse to a high or low state. The delay and the pulse width can be independently adjusted.

The MC14538BDTR2G is designed for operation from 5V supply. The logic input is tolerant to up to 5.5V, and it is also capable of producing logic outputs of voltages up to 4V. The operating temperature range is -55°C to +125°C. The power supply current is specified to a maximum of 10mA, while the output current is up to 2mA.

The MC14538BDTR2G is an advanced, low-power device ideal for use in various time-critical applications. It offers flexibility for various applications and provides easy design and integration into other systems.

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