LS7210 데이터 시트보기 (PDF) - LSI Corporation

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LS7210

PROGRAMMABLE DIGITAL DELAY TIMER

LSI Corporation  

+V

14

V SS

+V

C

5

OSC

R

V DD

7

TRIGGER

OUT (Dual Delay)

OUT (Delayed Release)

OUT (Delayed Operate)

(C)

(D)

FIGURE 2.

LS7210 OSCILLATOR CONNECTION

The information included herein is believed to be

accurate and reliable. However, LSI Computer Systems,

Inc. assumes no responsibilities for inaccuracies, nor for

any infringements of patent rights of others which may

result from its use.

OUT (One-Shot)

<

(A)

(B)

(E)

FIGURE 3. MODE DEFINITION TIMING DIAGRAM

A - Turn-off delay in Dual Delay and Delayed Release mode.

B - Turn-on delay in Dual Delay and Delayed Operate mode; one-shot period in One-Shot mode.

C - Output remains on in Delayed Release and Dual Delay modes due to negative trigger

transition before the turn-off delay is over.

D - Output remains off in Delayed Operate mode due to positive trigger transition before

the turn-on delay is over.

E - One-Shot period extended by re-triggering.

Note: ∆ is the programmed delay.

TIME-BASE CLK

A

tL

tH

DELAYED RELEASE MODE

B

ts

TRIGGER

tnd

OUT

tod

PROGRAMMED

TURN-OFF

DELAY

ONE-SHOT

MODE

tod

tsd

7210-020298-3

FIGURE 4. LS7210 TIMING DIAGRAM

N o t e 1 . - A,B and Trigger inputs are clocked into the input latches with the negative edge of the time-base clock.

N o t e 2 . - In all modes except One-Shot, the output changes with the positive transition of the time-base clock.

In One-Shot mode the output is turned on with the negative transition and turned off with the

positive transition of the time-base clock.

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