DS12CR887 datasheet(4/23 Pages) MAXIM

Part #	DS12CR887

Description	RTCs with Constant-Voltage Trickle Charger

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Manufacturer	MAXIM [Maxim Integrated Products]

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RTCs with Constant-Voltage Trickle Charger

4

_____________________________________________________________________

AC ELECTRICAL CHARACTERISTICS

(VCC = 2.97V to 3.63V, TA = -40°C to +85°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Cycle Time

tCYC

280

DC

ns

Pulse Width, DS Low or R/W High

PWEL

130

ns

Pulse Width, DS High or R/W Low

PWEH

90

ns

Input Rise and Fall

tR, tF

30

ns

R/W Hold Time

tRWH

0

ns

R/W Setup Time Before DS

tRWS

15

ns

Chip-Select Setup Time Before

DS or R/W

tCS

8

ns

Chip-Select Hold Time

tCH

0

ns

Read-Data Hold Time

tDHR

5

55

ns

Write-Data Hold Time

tDHW

0

ns

Address Valid Time to AS Fall

tASL

30

ns

Address Hold Time to AS Fall

tAHL

15

ns

Delay Time DS to AS Rise

tASD

15

ns

Pulse Width AS High

PWASH

45

ns

Delay Time, AS to DS Rise

tASED

55

ns

Output Data Delay Time from DS

or R/W

tDDR

(Note 8)

20

80

ns

Data Setup Time

tDSW

70

ns

Reset Pulse Width

tRWL

5

μs

IRQ Release from DS

tIRDS

0

2

μs

IRQ Release from RESET

tIRR

0

2

μs

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DS12CR887 Datasheet(PDF) 4 Page - Maxim Integrated Products

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