IDT1338

REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM

RTC

IDT®

REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM 11

IDT1338

REV K 032910

Handling, PCB Layout, and Assembly

The IDT1338 package contains a quartz tuning-fork crystal. Pick-and-place equipment may be used, but precautions should

be taken to ensure that excessive shocks are avioded. Ultarsonic cleaning equipment should be avioded to prevent damage

to the crystal.

Avoid running signal traces under the package, unless a ground plane is placed between the package and the signal line.

All NC (no connect) pins must be connected to ground.

Moisture-sensitive packages are shipped from the factory dry-packed. Handling instructions listed on the package label must

be followed to prevent damage during reflow. Refer to the IPC/JEDEC J-STD-020 standard for moisture-sensitive device

(MSD) classifications.

Absolute Maximum Ratings

Stresses above the ratings listed below can cause permanent damage to the IDT1338. These ratings, which are

standard values for IDT commercially rated parts, are stress ratings only. Functional operation of the device at these

or any other conditions above those indicated in the operational sections of the specifications is not implied.

Exposure to absolute maximum rating conditions for extended periods can affect product reliability. Electrical

parameters are guaranteed only over the recommended operating temperature range.

Recommended DC Operating Conditions

TA = +25°C, unless otherwise noted.) (Note 1)

Item

Rating

Voltage Range on Any Pin Relative to Ground

-0.3 V to +6.0 V

Storage Temperature

-55 to +125° C

Soldering Temperature

260° C

Parameter

Symbol

Min.

Typ.

Max.

Units

Ambient Operating Temperature

-40

+85

°

C

1.3

3.0

3.7

Pull-up Resistor Voltage (SQW/OUT), Note 2

5.5

V

Logic 1, Note 2

V

Logic 0, Note 2

-0.3

V

Supply Voltage

IDT1338-18

1.8

5.5

V

IDT1338-31

3.3

5.5

Power Fail Voltage

IDT1338-18

1.40

1.62

1.71

V

IDT1338-31

2.45

2.7

2.97