DS1392U-3+ datasheet(3/26 Pages) MAXIM

Part #	DS1392U-3+

Description	Low-Voltage SPI/3-Wire RTCs with Trickle Charger

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Manufacturer	MAXIM [Maxim Integrated Products]

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Low-Voltage SPI/3-Wire RTCs with

Trickle Charger

_____________________________________________________________________

3

RECOMMENDED DC OPERATING CONDITIONS (continued)

(VCC = VCC(MIN) to VCC(MAX), TA = -40°C to +85°C, unless otherwise noted. Typical values are at nominal supply voltage and TA = +25°C,

unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

-33

115

175

-3

80

125

VCC Standby Current

(Note 11)

ICCS

-18

60

100

μA

VBACKUP Leakage Current

(VBACKUP = 3.7V,

VCC = VCC(MAX))

IBACKUPLKG

15

100

nA

DC ELECTRICAL CHARACTERISTICS

(VCC = 0V, VBACKUP = 3.7V, TA = -40°C to +85°C, unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

VBACKUP Current OSC On,

SQW Off

IBACKUP1

(Note 12)

500

1000

nA

VBACKUP Current OSC On,

SQW On (32kHz)

IBACKUP2

(Note 12)

600

1150

nA

VBACKUP Current OSC On,

SQW On, VBACKUP = 3.0V,

TA = +25°C

IBACKUP3

(Note 12)

600

1000

nA

VBACKUP Current, OSC Off

(Data Retention)

IBACKUPDR (Note 12)

25

100

nA

AC ELECTRICAL CHARACTERISTICS—SPI INTERFACE

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

PARAMETER

SYMBOL

CONDITION

MIN

TYP

MAX

UNITS

2.7V

VCC

5.5V

0

4

SCLK Frequency (Note 13)

fSCLK

1.71V

VCC

1.89V

0

1

MHz

Data to SCLK Setup

tDC

(Notes 13, 14)

30

ns

SCLK to Data Hold

tCDH

(Notes 13, 14)

30

ns

2.7V

VCC

5.5V

80

SCLK to Data Valid

(Notes 13, 14, 15)

tCDD

1.71V

VCC

1.89V

160

ns

2.7V

VCC

5.5V

110

SCLK Low Time (Note 13)

tCL

1.71V

VCC

1.89V

400

ns

2.7V

VCC

5.5V

110

SCLK High Time (Note 13)

tCH

1.71V

VCC

1.89V

400

ns

SCLK Rise and Fall

tR, tF

200

ns

CS to SCLK Setup (Note 13)

tCC

400

ns

SCLK to CS Hold (Note 13)

tCCH

100

ns

2.7V

VCC

5.5V

400

CS Inactive Time (Note 13)

tCWH

1.71V

VCC

1.89V

500

ns

CS to Output High Impedance

tCDZ

(Notes 13, 14)

40

ns

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DS1392U-3+ Datasheet(PDF) 3 Page - Maxim Integrated Products

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