MC146818AS 查看數據表（PDF） - Motorola => Freescale

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产品描述 (功能)

生产厂家

MC146818AS

REAL-TIME CLOCK PLUS RAM

Motorola => Freescale 

FIGURE 9 – EXTERNAL TIME-BASE CONNECTION

4.1%304 MHz

or

1.W576 MHz

VDD

$Optional

(VDD–1.O VI

I

I

2

Oscl

32.7:; kHz

3

(Open)<—

OSC2

LMC146818A

,..

,!~.-

OSC2

MC146818A

fow

RS (Maximum)

CO (Maximum)

cl

Q

Cin/Cout

R

Rf

4.1-

MHz

75 Q

7 pF

0.012 pF

50 k

15-30 pF

—

10 M

1.046576 MHz

700 n

5 pF

0.~8 pF

35 k

15-40 pF

—

10 M

32.7@ kHz

Wk

1.7 pF

0.~3 pF

30 k

10-22 pF

300-470 k

22 M

MOTOROLA

@

Semiconductor Products Inc.

9

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