SM8577BS 查看數據表（PDF） - Nippon Precision Circuits

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SM8577BS

Real-time Clock IC

Nippon Precision Circuits  

NIPPON PRECISION CIRCUITS INC.

SM8577B

Real-time Clock IC

OVERVIEW

The SM8577B is a CMOS serial-interface type real-

time clock IC that operates at 32.768 kHz. It

employs a 3-line serial interface to transfer time and

date data. It incorporates a supply-voltage detect

function to determine data validity/invalidity. It

features an output interrupt with 32 kHz or 1 Hz

output frequency. It is available in 8-pin SOPs.

FEATURES

s 2.5 to 5.5 V operating voltage range

s 1.0 µA at 3.0 V (typ) current consumption

s 3-line serial interface

s 1.7 ± 0.3 V supply voltage detection threshold

s Timer counters for second, minute, hour, day, day

of the week, month, and year

s Automatic leap-year calendar adjustment

s 32.768 kHz and 1 Hz output interrupt selectable

s Crystal oscillator circuit built-in (CD built-in)

s 24-hour time mode

s 8-pin SOP

PINOUT

CE 1

8

DATA

CLK

FOUT 4

5

PACKAGE DIMENSIONS

Unit: mm

8-pin SOP

VDD

XTN

XT

VSS

+

0.15−

0.10

0.05

ORDERING INFOMATION

Device

SM8577BS

Package

8pin SOP

5.2 0.3

1.27

0.4 0.1

0 to 10∞

NIPPON PRECISION CIRCUITS—1

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