DS17285(1998) View Datasheet(PDF) - Dallas Semiconductor -> Maxim Integrated

Part Name

Description

Manufacturer

DS17285
(Rev.:1998)

3 Volt/5 Volt Real Time Clock

Dallas Semiconductor -> Maxim Integrated 

DS17285/DS17287

POWER–UP POWER–DOWN TIMING 5 VOLT DEVICE

PARAMETER

SYMBOL

MIN

TYP

CS High to Power Fail

tPF

Recovery at Power–up

tREC

150

VCC Slew Rate Power–down

tF

300

4.0 <VCC < 4.5V

VCC Slew Rate Power–down

tFB

10

3.0 <VCC< 4.0V

VCC Slew Rate Power–up

tR

0

4.5V>VCC>4.0V

Expected Data Retention

tDR

10

MAX

0

(tA = 25°C)

UNITS NOTES

ns

ms

µs

µs

µs

years 10, 11

POWER–UP POWER–DOWN TIMING 3 VOLT DEVICE

PARAMETER

SYMBOL

MIN

TYP

MAX

(tA = 25°C)

UNITS NOTES

CS High to Power Fail

tPF

Recovery at Power–up

tREC

150

VCC Slew Rate Power–down

tF

300

2.5 <VCC < 3.0V

VCC Slew Rate Power–up

tR

0

3.0V>VCC>2.5V

Expected Data Retention

tDR

10

0

ns

ms

µs

µs

years 10, 11

WARNING:

Under no circumstances are negative undershoots, of any amplitude, allowed when device is in battery back-up

mode.

CAPACITANCE

PARAMETER

Input Capacitance

Output Capacitance

SYMBOL MIN

CIN

COUT

WAKE UP/KICKSTART TIMING

PARAMETER

SYMBOL MIN

Kickstart Input Pulse Width

Wake up/Kickstart Power On

Timeout

tKSPW

2

tPOTO

2

TYP

TYP

MAX

12

12

MAX

UNITS

pF

pF

(tA = 25°C)

NOTES

(tA = 25°C)

UNITS NOTES

µs

seconds

8

030598 26/32

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