MCP795W20 datasheet(4/54 Pages) MICROCHIP

Part #	MCP795W20

Description	3V SPI Real-Time Clock Calendar with Enhanced Features and Battery Switchover

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Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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MCP795W1X/MCP795W2X

DS22280C-page 4

Preliminary

 2011-2012 Microchip Technology Inc.

TABLE 1-2:

AC CHARACTERISTICS

Industrial (I):

TAMB = -40°C to +85°C VCC = 1.8V to 3.6V

Param.

No.

Sym.

Characteristic

Min.

Max.

Units

Test Conditions

1FCLK

Clock Frequency

—

5

3

MHz

2.5V

Vcc  3.6V

1.8V

Vcc  2.5V

2TCSS

CS Setup Time

100

150

—

ns

2.5V

Vcc  3.6V

1.8V

Vcc  2.5V

3TCSH

CS Hold Time

100

150

—

ns

2.5V

Vcc  3.6V

1.8V

Vcc  2.5V

4TCSD

CS Disable Time

50

—

ns

—

5

Tsu

Data Setup Time

20

30

—

ns

2.5V

Vcc  3.6V

1.8V

Vcc  2.5V

6THD

Data Hold Time

40

50

—

ns

2.5V

Vcc  3.6V

1.8V

Vcc  2.5V

7TR

CLK Rise Time

—

100

ns

(Note 1)

8TF

CLK Fall Time

—

100

ns

(Note 1)

9THI

Clock High Time

100

150

—

ns

2.5V

Vcc  3.6V

1.8V

Vcc  2.5V

10

TLO

Clock Low Time

100

150

—

ns

2.5V

Vcc  3.6V

1.8V

Vcc  2.5V

11

TCLD

Clock Delay Time

50

—

ns

—

12

TCLE

Clock Enable Time

50

—

ns

—

13

TV

Output Valid from Clock

Low

—

100

160

ns

2.5V

Vcc  3.6V

1.8V

Vcc  2.5V

14

THO

Output Hold Time

0

—

ns

(Note 1)

15

TDIS

Output Disable Time

—

80

160

ns

2.5V

Vcc  3.6V (Note 1)

1.8V

Vcc  2.5V (Note 1)

16

TWC

Internal Write Cycle Time

—

5

ms

(Note 3)

17

—

Endurance

1,000,000

—

E/W

Cycles

(Note 2)

Note 1: This parameter is periodically sampled and not 100% tested.

2: This parameter is not tested but ensured by characterization. For endurance estimates in a specific

application, please consult the Total Endurance™ Model which can be obtained from Microchip’s web site:

www.microchip.com.

3: TWC begins on the rising edge of CS after a valid write sequence and ends when the internal write cycle

is complete.

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MCP795W20 Datasheet(PDF) 4 Page - Microchip Technology

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