SM8578BV Просмотр технического описания (PDF) - Nippon Precision Circuits

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Компоненты Описание

производитель

SM8578BV

Real-time Clock IC

Nippon Precision Circuits  

SM8578BV

Oscillator Characteristics

Ta = 25°C, CG = 10pF, X’tal = NPC reference crystal (CI = 30kΩ, CL = 6pF) unless otherwise noted.

Parameter

Symbol

Condition

Oscillator startup time

Oscillator stop voltage

Frequency voltage characteristic

Frequency accuracy

Output capacitance

T STA

V STO

f/V

εIC

CD

VDD = 1.6V

VDD = 1.6 to 5.5V

VDD = 5.0V

VDD = 5.0V

Rating

Unit

min

typ

max

–

–

5.0

s

–

–

1.5

V

−2

–

2

ppm/V

−10

–

10

ppm

–

15

–

pF

AC Characteristics

VSS = 0V, Ta = −40 to +85°C unless otherwise noted.

Parameter

Symbol

Condition

VDD = 5.0V ± 10%

VDD = 3.0V ± 10%

Unit

min

typ

max

min

typ

max

CLK clock cycle

CLK HIGH-level pulsewidth

CLK LOW-level pulsewidth

CE setup time

CE hold time

CE recovery time

CLK hold time

Write data setup time

Write data hold time

Read data output delay time

Output disable delay time

Input rise and fall time

Abnormal oscillation detection

time

t CLK

t WH

t WL

t CS

t CH

t CR

t CKH

t DS

t DH

t RD

CL = 50pF

t RZ

CL = 50pF

RL = 10kΩ

t RF

tOSC

600

–

–

1200

–

–

ns

300

–

–

600

–

–

ns

300

–

–

600

–

–

ns

150

–

–

300

–

–

ns

200

–

–

400

–

–

ns

300

–

–

600

–

–

ns

50

–

–

100

–

–

ns

50

–

–

100

–

–

ns

50

–

–

100

–

–

ns

–

–

200

–

–

400

ns

–

–

100

–

–

200

ns

–

–

20

–

–

40

ns

10

–

–

10

–

–

ms

NIPPON PRECISION CIRCUITS INC.—4

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