Rainbow-electronics DS1393 Manuel d'utilisateur télécharger pdf (Page 3)

DS1390/DS1391/DS1392/DS1393

Low-Voltage SPI/3-Wire RTCs with

Trickle Charger

_____________________________________________________________________ 3

RECOMMENDED DC OPERATING CONDITIONS (continued)

= V

CC(MIN)

to V

CC(MAX)

, T

= -40°C to +85°C, unless otherwise noted. Typical values are at nominal supply voltage and T

= +25°C,

unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX

UNITS

-33

115

175

-3 80 125

Standby Current

(Note 11)

CCS

-18 60 100

µA

BACKUP

Leakage Current

BACKUP

= 3.7V,

= V

CC(MAX)

)

BACKUPLKG

15 100 nA

DC ELECTRICAL CHARACTERISTICS

= 0V, V

BACKUP

= 3.7V, T

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

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX

UNITS

BACKUP

Current OSC On,

SQW Off

BACKUP1

(Note 12)

500 1000

BACKUP

Current OSC On,

SQW On (32kHz)

BACKUP2

(Note 12)

600 1150

BACKUP

Current OSC On,

SQW On, V

BACKUP

= 3.0V,

= +25°C

BACKUP3

(Note 12)

600 1000

BACKUP

Current, OSC Off

(Data Retention)

BACKUPDR

(Note 12) 25 100 nA

AC ELECTRICAL CHARACTERISTICS—SPI INTERFACE

= V

CC(MIN)

to V

CC(MAX)

, T

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

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 (Note 13) t

400

SCLK to CS Hold (Note 13) t

CCH

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

(Notes 13, 14) 40 ns

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

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Rainbow-electronics DS1393 Manuel d'utilisateur Page 3

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