LS7211 데이터 시트보기 (PDF) - LSI Corporation

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LS7211

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TRIGGER IN

25pF

25pF

ƒ

470K

1

A

2B

18 TRIG

4

XTLI

10M

5 XTLO

+V

S1

6

PSCLS

LS7212

7

+V

RESET

8

Vss

+V

V DD 3

17

WB0

16

WB1

15

WB2

14

WB3

13

WB4

12

WB5

11

WB6

10

WB7

1s/1m

2s/2m

4s/4m

8s/8m

16s/16m

32s/32m

64s/64m

128s/128m

s = seconds

m = minutes

OUTPUT

9

OUT

NOTE : Crystal Frequency, ƒ = 32,768Hz

Switch: S1 low: Delay increment = 1s; Maximum Delay = 255s

S1 high: Delay increment = 1m; Maximum Delay = 255m

FIGURE 9. PROGRAMMABLE ACCURATE REAL-TIME DELAY GENERATION

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