SM8577BS datasheet(1/10 Pages) NPC

Part #	SM8577BS

Description	Real-time Clock IC

PDF	10 Pages

Scroll/Zoom	100%

Manufacturer	NPC [Nippon Precision Circuits Inc]

Direct Link	http://www.npc.co.jp/en

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SM8577B

NIPPON PRECISION CIRCUITS—1

NIPPON PRECISION CIRCUITS INC.

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

ORDERING INFOMATION

PINOUT

PACKAGE DIMENSIONS

Unit: mm

8-pin SOP

Device

Package

SM8577BS

8pin SOP

CE

DATA

CLK

FOUT

VDD

XTN

XT

VSS

1

4

5

8

0.4 0.1

1.27

5.2 0.3

0.15

+ 0.10

− 0.05

0 to 10

∞

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SM8577BS Datasheet(PDF) 1 Page - Nippon Precision Circuits Inc

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