Rainbow-electronics DS1375 Bedienungsanleitung PDF herunterladen (Seite 2)

DS1375

2-Wire Digital Input RTC with Alarm

2 _____________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

RECOMMENDED DC OPERATING CONDITIONS

= +1.7V to +5.5V, T

= -40°C to +85°C, unless otherwise noted. Typical values are at V

= 3.3V, T

= +25°C, unless other-

wise noted.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

Note 1: Limits at -40°C are guaranteed by design and not production tested.

Note 2: All voltages are referenced to ground.

Note 3: For the CLK pin, input voltages above V

+ 0.3V cause current to flow into the device. The input current must not

exceed the current drawn by the circuit that is connected to V

. Otherwise, current flows out of the DS1375, raising the

voltage level on the V

bus.

Note 4: V

IL MIN

on the CLK pin can exceed -0.3V as long as the current is limited to less than 1mA.

Note 5: I

CCA

—SCL clocking at max frequency = 400kHz.

Note 6: CLK pin running at 32,768Hz, rise and fall times at 10ns or less.

Note 7: Specified with 2-wire bus inactive.

Voltage Range on V

Relative to Ground.............................................-0.3V to +6.0V

Voltage Range on SDA, SCL, and WDS

Relative to Ground....................................-0.3V to V

+ 0.3V

Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature Range .............................-55°C to +125°C

Soldering Temperature .......................................See IPC/JEDEC

J-STD-020A Specification

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Voltage V

(Note 2) 1.7 3.3 5.5 V

Timekeeping Voltage V

(Note 2) 1.3 5.5 V

Input Logic 1 (SDA, SCL) V

(Note 2) 0.7 x V

+ 0.3 V

Supply Voltage, Pullup

(SQW/INT, CLK)

PULLUP

(Notes 2, 3) 5.5 V

Input Logic 0 V

(Notes 2, 4) -0.3

+0.3

Input Leakage (SCL, CLK) I

-1 +1 µA

I/O Leakage (SDA, SQW/INT)I

-1 +1 µA

> 2V; V

= 0.4V

SDA Logic 0 Output I

OLSDA

< 2V; V

= 0.2 x V

3.0 mA

> 2V; V

= 0.4V

1.7V < V

< 2V; V

= 0.2 x V

3.0 mA

SQW/INT Logic 0 Output I

OLSQW

1.3V < V

< 1.7V; V

= 0.2 x V

250 µA

Active Supply Current I

CCA

(Notes 5, 6) 33 150 µA

Standby Current I

CCS

(Notes 6, 7) 150 500 nA

1 2 3 4 5 6 7 ... 10 11

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