V3020SO8B datasheet(7/17 Pages) EMMICRO

Part #	V3020SO8B

Description	Ultra Low Power 1-Bit 32 kHz RTC

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Manufacturer	EMMICRO [EM Microelectronic - MARIN SA]

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Timing Characteristics (standard temperature range)

VSS= 0V and TA=-40 to +85°C, unless otherwise specified

Parameter

Symbol

Test Conditions

Min.

Max.

Min.

Typ.

Max.

Unit

VDD ≥ 2V

VDD = 5.0V ±10%

Chip select duration

tCS

Write cycle

500

50

ns

RAM access time (note 1)

tACC

CLOAD = 50pF

300

50

60

ns

Time between two transfers

tW

500

100

ns

Rise time (note 2)

tR

10

200

10

200

ns

Fall time (note 2)

tF

10

200

10

200

ns

Data valid to Hi-impedance (note 3)

tDF

15

200

15

30

40

ns

Write data settle time (note 4)

tDW

80

50

ns

Data hold time (note 5)

tDH

120

25

ns

Advance write time

tADW

20

10

ns

Write pulse time (note 6)

tWC

500

50

ns

Table 4

Timing Characteristics (standard temperature range)

VSS= 0V and TA=-40 to +125°C, unless otherwise specified

Parameter

Symbol

Test Conditions

Min.

Max.

Min.

Typ.

Max.

Unit

VDD ≥ 2V

VDD = 5.0V ±10%

Chip select duration

tCS

Write cycle

500

60

ns

RAM access time (note 1)

tACC

CLOAD = 50pF

300

50

60

ns

Time between two transfers

tW

500

120

ns

Rise time (note 2)

tR

10

100

10

100

ns

Fall time (note 2)

tF

10

100

10

100

ns

Data valid to Hi-impedance (note 3)

tDF

15

200

15

30

50

ns

Write data settle time (note 4)

tDW

80

50

ns

Data hold time (note 5)

tDH

120

25

ns

Advance write time

tADW

20

15

ns

Write pulse time (note 6)

tWC

500

60

ns

Table 4 ex.

Note 1

: tACC starts from RD or CS , whichever activates last

Typically, tACC = 5 + 0.9 CEXT in ns; where CEXT (external parasitic capacitance) is in pF

Note 2

: CS ,

RD , DS , WR and R/ W rise and fall times are specified by tR and tF

Note 3

: tDF starts from RD or CS , whichever deactivates first

Note 4

: tDW ends at WR or CS , whichever deactivates first

Note 5

: tDH starts from WR or CS , whichever deactivates first

Note 6

: tWC starts from WR or CS , whichever activates last and ends at WR or CS , whichever deactivates first

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