2

FN8097.2

September 23, 2005

PIN DESCRIPTIONS

PIN ASSIGNMENTS

NC = No internal connection

X1

X2

IRQ

SCL

SDA

1

2

3

4

7

8

6

5

8 Ld TSSOP

X1205

X1

X2

IRQ

SCL

SDA

1

2

3

4

7

8

6

5

8 Ld SOIC

Ordering Information

PART NUMBER

PART MARKING

TEMP RANGE (°C)

PACKAGE

X1205S8*

X1205

2.7 to 5.5

0 to 70

8 Ld SOIC (150 mil)

X1205S8Z* (Note)

X1205 Z

0 to 70

8 Ld SOIC (150 mil) (Pb Free)

X1205S8I*

X1205 I

-40 to 85

8 Ld SOIC (150 mil)

X1205S8IZ* (Note)

X1205 Z I

-40 to 85

8 Ld SOIC (150 mil) (Pb Free)

X1205V8*

1205

0 to 70

8 Ld TSSOP (4.4mm)

X1205V8Z* (Note)

1205 Z

0 to 70

8 Ld TSSOP (4.4mm) (Pb-free)

X1205V8I*

1205I

-40 to 85

8 Ld TSSOP (4.4mm)

X1205V8IZ* (Note)

1205I Z

-40 to 85

8 Ld TSSOP (4.4mm) (Pb-free)

*Add “T1” suffix for tape and reel.

NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin

plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are

MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.

Pin Number

Symbol

Brief Description

SOIC

TSSOP

13

X1

X1. The X1 pin is the input of an inverting amplifier and should be connected to one pin

of a 32.768kHz quartz crystal.

24

X2

X2. The X2 pin is the output of an inverting amplifier and should be connected to one pin

of a 32.768kHz quartz crystal.

35

IRQ

Interrupt Output – IRQ. This is an interrupt signal output. This signal notifies a host proces-

sor that an alarm has occurred and requests action. It is an open drain active low output.

46

57

SDA

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.

68

SCL

Serial Clock (SCL). The SCL input is used to clock all data into and out of the device.

71

Supercap or tied to ground if not used.

82

X1205