DS1391U-3 datasheet(5/24 Pages) MAXIM

Part #	DS1391U-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

_____________________________________________________________________

5

AC ELECTRICAL CHARACTERISTICS—3-WIRE INTERFACE

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

PARAMETER

SYMBOL

CONDITION

MIN

TYP

MAX

UNITS

2.7V

≤ VCC ≤ 5.5V

4

SCLK Frequency (Note 13)

fSCLK

1.71V

≤ VCC ≤ 1.89V

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

tCC

(Note 13)

400

ns

SCLK to CS Hold

tCCH

(Note 13)

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

(Note 13, 14)

40

ns

AC ELECTRICAL CHARACTERISTICS

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

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Pushbutton Debounce

PBDB

160

200

ms

Reset Active Time

tRST

160

200

ms

Oscillator Stop Flag (OSF) Delay

tOSF

(Note 16)

100

ms

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DS1391U-3 Datasheet(PDF) 5 Page - Maxim Integrated Products

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