DS32kHz

5 of 10

PIN DESCRIPTIONS

PIN

BGA

DIP

NAME

FUNCTION

A4, A5, B4, B5

5

+3V Batttery Supply

A7, A8, B7, B8,

C7, C8, D7, D8

10, 11

TPIN

Test Pin (must be grounded)

C2, C3, D2, D3

13

Primary Power Supply

C4, C5, D4, D5

12

32KHZ OUT

32.768kHz Output

—

1, 6–9, 14

N.C.

No Connection

All remaining balls

4

GND

Ground

Figure 1. Delta Time and Frequency vs. Temperature

FUNCTIONAL DESCRIPTION

of power. The output is accurate to ±7.5ppm (±4 min/yr) from –40°C to +85°C and ±2ppm (±1 min/yr) from 0°C to

+40°C.

The

DS32kHz is

packaged

in

a

small

36-pin

SMD

using

ball

grid

array (BGA)

technology

with dimensions 0.400" wide, 0.450" long, and 0.124" high. It also is available in a 14-pin DIP module.

The additional board space required is negligible in most applications and, therefore, the recommended land

pattern layout should be implemented on all new designs and future board revisions to satisfy applications requiring

better timekeeping accuracy.

0.00

-10.00

-20.00

-30.00

-40.00

-50.00

-60.00

-70.00

-80.00

-90.00

-100.00

TYPICAL CRYSTAL

UNCOMPENSATED

DS32kHz

OUTPUT