ISL12026_10 datasheet(7/24 Pages) INTERSIL

tên linh kiện	ISL12026

Giải thích chi tiết về linh kiện	Real Time Clock/Calendar with I2C Bus??and EEPROM

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nhà sản xuất	INTERSIL [Intersil Corporation]

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7

FN8231.9

November 30, 2010

Description

The ISL12026 device is a Real Time Clock with clock/

calendar, two polled alarms with integrated 512x8 EEPROM,

oscillator compensation and battery backup switch.

The oscillator uses an external, low-cost 32.768kHz crystal.

All compensation and trim components are integrated on the

chip. This eliminates several external discrete components

and a trim capacitor, saving board area and component cost.

The Real Time Clock keeps track of time with separate

registers for Hours, Minutes and Seconds. The Calendar has

separate registers for Date, Month, Year and Day-of-week.

The calendar is correct through 2099, with automatic leap

year correction.

The Dual Alarms can be set to any Clock/Calendar value for

a match. For instance, every minute, every Tuesday, or 5:23

AM on March 21. The alarms can be polled in the Status

Register or can provide a hardware interrupt (IRQ/FOUT

Pin). There is a pulse mode for the alarms allowing for

repetitive alarm functionality.

The IRQ/FOUT pin may be software selected to provide a

frequency output of 1Hz, 4096Hz, or 32,768Hz or inactive.

The device offers a backup power input pin. This VBAT pin

allows the device to be backed up by battery or SuperCap.

The entire ISL12026 device is fully operational from 2.7V to

5.5V and the clock/calendar portion of the ISL12026 device

remains fully operational down to 1.8V (Standby Mode).

The ISL12026 device provides 4k bits of EEPROM with 8

modes of BlockLock™ control. The BlockLock™ allows a

safe, secure memory for critical user and configuration data,

while allowing a large user storage area.

Pin Descriptions

Serial Clock (SCL)

The SCL input is used to clock all data into and out of the

device. The input buffer on this pin is always active (not

gated). The pull-up resistor on this pin must use the same

voltage source as VDD.

Serial Data (SDA)

SDA is a bidirectional pin used to transfer data into and out

of the device. It has an open drain output and may be wire

ORed with other open drain or open collector outputs. The

input buffer is always active (not gated).

This open drain output requires the use of a pull-up resistor.

The pull-up resistor on this pin must use the same voltage

source as VDD. The output circuitry controls the fall time of the

output signal with the use of a slope controlled pull-down. The

circuit is designed to comply with 400kHz I2C interface speed.

VBAT

This input provides a backup supply voltage to the device.

VBAT supplies power to the device in the event the VDD

supply fails. This pin can be connected to a battery, a

SuperCap or tied to ground if not used.

IRQ/FOUT (Interrupt Output/Frequency Output)

This dual function pin can be used as an interrupt or

frequency output pin. The IRQ/FOUT mode is selected via

the frequency out control bits of the INT register.

• Interrupt Mode. The pin provides an interrupt signal

output. This signal notifies a host processor that an alarm

has occurred and requests action. It is an open drain

active low output.

• Frequency Output Mode. The pin outputs a clock signal

which is related to the crystal frequency. The frequency

output is user selectable and enabled via the I2C bus. It is

an open drain output.

FIGURE 5. IDD3 vs VDD

FIGURE 6.

ΔF

OUT vs ATR SETTING

Typical Performance Curves (Continued)Temperature is +25°C unless otherwise specified.

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

1.82.3

2.83.3

3.84.3

4.8

5.3

VDD (V)

-40

-20

0

20

40

60

80

-32 -28 -24 -20 -16 -12 -8 -4 0

4

8 12 16 20 24 28

ATR SETTING

ISL12026, ISL12026A

Số phần tương tự - ISL12026_10

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Intersil Corporation	ISL12026A	9Mb / 44P	Providing high-performance solutions for every link in the signal chain
Renesas Technology Corp	ISL12026A	1,002Kb / 24P	Real Time Clock/Calendar with I2C Bus??and EEPROM
Intersil Corporation	ISL12026AIBZ	389Kb / 24P	Real Time Clock/Calendar with I2C Bus??and EEPROM
Renesas Technology Corp	ISL12026AIBZ	1,002Kb / 24P	Real Time Clock/Calendar with I2C Bus??and EEPROM
Intersil Corporation	ISL12026AIVZ	389Kb / 24P	Real Time Clock/Calendar with I2C Bus??and EEPROM

More results

Mô tả tương tự - ISL12026_10

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Intersil Corporation	ISL12025	423Kb / 27P	Real-Time Clock/Calendar with I2C Bus and EEPROM
	ISL12029_1012	580Kb / 29P	Real Time Clock/Calendar with I2C Bus??and EEPROM
	ISL12026	389Kb / 24P	Real Time Clock/Calendar with I2C Bus??and EEPROM
Renesas Technology Corp	ISL12028	1Mb / 29P	Real Time Clock/Calendar with I2C Bus??and EEPROM
Intersil Corporation	ISL12028	584Kb / 29P	Real Time Clock/Calendar with I2C Bus??and EEPROM
Intersil Corporation	ISL12028_1011	586Kb / 29P	Real Time Clock/Calendar with I2C Bus??and EEPROM
Renesas Technology Corp	ISL12026	1,002Kb / 24P	Real Time Clock/Calendar with I2C Bus??and EEPROM
Intersil Corporation	ISL12029	580Kb / 30P	Real Time Clock/Calendar with I2C Bus??and EEPROM
Renesas Technology Corp	ISL12025	1Mb / 28P	Real-Time Clock/Calendar with I2C Bus??and EEPROM
Renesas Technology Corp	ISL12029	1Mb / 29P	Real Time Clock/Calendar with I2C Bus™ and EEPROM December 16, 2010

More results

ISL12026 bảng dữ liệu(PDF) 7 Page - Intersil Corporation

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Số phần tương tự - ISL12026_10

Mô tả tương tự - ISL12026_10

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