DS17287-5 查看數據表（PDF） - Dallas Semiconductor -> Maxim Integrated

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DS17287-5

3V/5V Real-Time Clock

Dallas Semiconductor -> Maxim Integrated 

ORDERING INFORMATION

PART #

DESCRIPTION

DS17285XX-X RTC Chip

3 +3V operating range

5 +5V operating range

blank commercial temp range

N industrial temp range

blank 24-pin DIP

E 28- pin TSOP

S 24- pin SO

DS17287X-X RTC Module; 24-pin DIP

3 +3V operating rang

5 +5V operating range

blank commercial temp range

N industrial

DS17285/DS17287

PIN DESCRIPTION

X1

- Crystal Input

X2

- Crystal Output

RCLR

- RAM Clear Input

AD0–AD7 - Multiplexed Address/Data Bus

PWR

- Power-On Interrupt Output (Open Drain)

KS

- Kickstart Input

CS

- RTC Chip-Select Input

ALE

- RTC Address Strobe

WR

- RTC Write Data Strobe

RD

- RTC Read Data Strobe

IRQ

- Interrupt Request Output (Open Drain)

SQW

- Square-Wave Output

VCC

- +3V or +5V Main Supply

GND

- Ground

VBAT - Battery + Supply

VBAUX - Auxiliary Battery Supply

NC

- No Connect

DESCRIPTION

The DS17285/DS17287 are real-time clocks (RTCs) designed as successors to the industry standard

DS1285, DS1385, DS1485, DS1585, and DS1685 PC real-time clocks. These devices provide the

industry standard DS1285 clock function with either +3V or +5V operation. The DS17285 also

incorporates a number of enhanced features including a silicon serial number, power-on/off control

circuitry, 114 bytes of user NV SRAM plus 2kB of additional NV RAM, and 32.768kHz output for

sustaining power management activities.

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