Rainbow-electronics DS1393 Manual do Utilizador descarregar pdf (Página 5)

DS1390/DS1391/DS1392/DS1393

Low-Voltage SPI/3-Wire RTCs with

Trickle Charger

_____________________________________________________________________ 5

AC ELECTRICAL CHARACTERISTICS—3-WIRE INTERFACE

= V

CC(MIN)

to V

CC(MAX)

, T

= -40°C to +85°C.) (Note 1) (Figures 3, 4)

PARAMETER

SYMBOL

CONDITION

MIN TYP MAX

UNITS

2.7V ≤ V

≤ 5.5V 4

SCLK Frequency (Note 13) f

SCLK

1.71V ≤ V

≤ 1.89V 1

MHz

Data to SCLK Setup t

(Notes 13, 14) 30 ns

SCLK to Data Hold t

CDH

(Notes 13, 14) 30 ns

2.7V ≤ V

≤ 5.5V 80

SCLK to Data Valid (Notes 13,

14, 15)

CDD

1.71V ≤ V

≤ 1.89V 160

2.7V ≤ V

≤ 5.5V

110

SCLK Low Time (Note 13) t

1.71V ≤ V

≤ 1.89V

400

2.7V ≤ V

≤ 5.5V

110

SCLK High Time (Note 13) t

1.71V ≤ V

≤ 1.89V

400

SCLK Rise and Fall t

, t

200 ns

CS to SCLK Setup t

(Note 13)

400

SCLK to CS Hold t

CCH

(Note 13)

100

2.7V ≤ V

≤ 5.5V

400

CS Inactive Time (Note 13) t

CWH

1.71V ≤ V

≤ 1.89V

500

CS to Output High Impedance t

CDZ

(Note 13, 14) 40 ns

AC ELECTRICAL CHARACTERISTICS

= V

CC(MIN)

to V

CC(MAX)

, T

= -40°C to +85°C, unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX

UNITS

Pushbutton Debounce PB

160

200 ms

Reset Active Time t

RST

160

200 ms

Oscillator Stop Flag (OSF) Delay

OSF

(Note 16)

100

1 2 3 4 5 6 7 8 9 10 ... 23 24

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