MC14536B Ver la hoja de datos (PDF) - Motorola => Freescale

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MC14536B

Programmable Timer

Motorola => Freescale 

PULSE

GEN.

+V

16

RS

6 8–BYPASS VDD

9A

OUT 1 4

10 B

C

11 C

12 D

2 RESET

RTC

OUT 2 5

14 SET

15 CLOCK INH

1 MONO–IN

7 CLOCK INH

3 IN1

DECODE OUT 13

VSS

8

RESET

OUT 1

OUT 2

DECODE OUT

POWER UP

tw

^ fosc

1

2.3 Rtc C

Rs ≥ Rtc

F = Hz

R = Ohms

C = FARADS

NOTE: This circuit is designed to use the on–chip oscillation function. The oscillator frequency is deter-

mined by the external R and C components. When power is first applied to the device, Decode Out

initializes to a high state. Because this output is tied directly to the Osc–Inh input, the oscillator is

disabled. This puts the device in a low–current standby condition. The rising edge of the Reset pulse

will cause the output to go low. This in turn causes Osc–Inh to go low. However, while Reset is high,

the oscillator is still disabled (i.e.: standy condition). After Reset goes low, the output remains low

for 2n/2 of the oscillator’s period. After the part times out, the output again goes high.

Figure 11. Time Interval Configuration Using On–Chip RC Oscillator and

Reset Input to Initiate Time Interval

(Divide–by–2 Configured)

MOTOROLA CMOS LOGIC DATA

MC14536B

11

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