CD4536BE

TEXAS INSTRUMENTS  CD4536BE  逻辑芯片, 可编程定时器, 16DIP

The is a CMOS Programmable Timer consisting of 24 ripple-binary counter stages. The salient feature of this device is its flexibility. The device can count from 1 to 224 or the first 8 stages can be bypassed to allow an output, selectable by a 4-bit code, from any one of the remaining 16 stages. It can be driven by an external clock or an RC oscillator that can be constructed using on-chip components. Input IN1 serves as either the external clock input or the input to the on-chip RC oscillator. OUT1 and OUT2 are connection terminals for the external RC components. In addition, an on-chip monostable circuit is provided to allow a variable pulse width output. Various timing functions can be achieved using combinations of these capabilities. A logic 1 on the 8-BYPASS input enables a bypass of the first 8 stages and makes stage 9 the first counter stage of the last 16 stages. Selection of 1 of 16 outputs is accomplished by the decoder and the BCD inputs A, B, C and D.

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Bypass input allows bypassing first 8 stages

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On-chip RC oscillator provision

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Clock inhibit input

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Schmitt-trigger in clock line permits operation with very long rise and fall times

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On-chip monostable output provision

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Test mode allows fast test sequence

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Set and reset inputs

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Capable of driving two low power TTL loads, one lower-power Schottky load or two HTL loads

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Standardized, symmetrical output characteristics

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100% Tested for quiescent current at 20V